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  Subjects -> PSYCHOLOGY (Total: 871 journals)
Showing 1 - 174 of 174 Journals sorted alphabetically
Acción Psicológica     Open Access   (Followers: 2)
Acta Colombiana de Psicología     Open Access   (Followers: 4)
Acta Comportamentalia     Open Access   (Followers: 3)
Acta de Investigación Psicológica     Open Access   (Followers: 2)
Acta Psychologica     Hybrid Journal   (Followers: 21)
Activités     Open Access   (Followers: 1)
Actualidades en Psicologia     Open Access   (Followers: 1)
Ad verba Liberorum : Journal of Linguistics & Pedagogy & Psychology     Open Access   (Followers: 8)
Addictive Behaviors Reports     Open Access   (Followers: 5)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 20)
ADHD Report The     Full-text available via subscription   (Followers: 6)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 38)
Advances in Mental Health     Hybrid Journal   (Followers: 68)
Advances in Physiotherapy     Hybrid Journal   (Followers: 50)
Advances in Psychology     Full-text available via subscription   (Followers: 56)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 28)
African Journal of Cross-Cultural Psychology and Sport Facilitation     Full-text available via subscription   (Followers: 3)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 390)
Aggressive Behavior     Hybrid Journal   (Followers: 16)
Aging, Neuropsychology, and Cognition     Hybrid Journal   (Followers: 33)
Ágora - studies in psychoanalytic theory     Open Access   (Followers: 3)
Aletheia     Open Access   (Followers: 1)
American Behavioral Scientist     Hybrid Journal   (Followers: 15)
American Imago     Full-text available via subscription   (Followers: 3)
American Journal of Applied Psychology     Open Access   (Followers: 33)
American Journal of Community Psychology     Hybrid Journal   (Followers: 24)
American Journal of Health Behavior     Full-text available via subscription   (Followers: 23)
American Journal of Orthopsychiatry     Hybrid Journal   (Followers: 4)
American Journal of Psychoanalysis     Hybrid Journal   (Followers: 20)
American Journal of Psychotherapy     Full-text available via subscription   (Followers: 33)
American Psychologist     Full-text available via subscription   (Followers: 163)
Anales de Psicología     Open Access   (Followers: 2)
Análise Psicológica     Open Access   (Followers: 1)
Análisis y Modificación de Conducta     Open Access   (Followers: 2)
Analysis     Full-text available via subscription   (Followers: 4)
Annual Review of Clinical Psychology     Full-text available via subscription   (Followers: 66)
Annual Review of Organizational Psychology and Organizational Behavior     Full-text available via subscription   (Followers: 25)
Annual Review of Psychology     Full-text available via subscription   (Followers: 196)
Anuario de Psicología / The UB Journal of Psychology     Open Access   (Followers: 1)
Anuario de Psicología Jurídica     Open Access   (Followers: 1)
Anxiety, Stress & Coping: An International Journal     Hybrid Journal   (Followers: 22)
Applied and Preventive Psychology     Hybrid Journal   (Followers: 13)
Applied Cognitive Psychology     Hybrid Journal   (Followers: 65)
Applied Neuropsychology : Adult     Hybrid Journal   (Followers: 32)
Applied Neuropsychology : Child     Hybrid Journal   (Followers: 18)
Applied Psychological Measurement     Hybrid Journal   (Followers: 17)
Applied Psychology     Hybrid Journal   (Followers: 126)
Applied Psychology: Health and Well-Being     Hybrid Journal   (Followers: 48)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 6)
Archive for the Psychology of Religion / Archiv für Religionspychologie     Hybrid Journal   (Followers: 16)
Archives of Clinical Neuropsychology     Hybrid Journal   (Followers: 26)
Archives of Scientific Psychology     Open Access   (Followers: 3)
Arquivos Brasileiros de Psicologia     Open Access   (Followers: 1)
Asia Pacific Journal of Counselling and Psychotherapy     Hybrid Journal   (Followers: 8)
Asia-Pacific Psychiatry     Hybrid Journal   (Followers: 3)
Asian American Journal of Psychology     Full-text available via subscription   (Followers: 5)
Asian Journal of Business Ethics     Hybrid Journal   (Followers: 7)
Assessment     Hybrid Journal   (Followers: 9)
At-Tajdid : Jurnal Ilmu Tarbiyah     Open Access   (Followers: 2)
Attachment: New Directions in Psychotherapy and Relational Psychoanalysis     Full-text available via subscription   (Followers: 16)
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 10)
Australian and Aotearoa New Zealand Psychodrama Association Journal     Full-text available via subscription  
Australian Educational and Developmental Psychologist, The     Full-text available via subscription   (Followers: 6)
Australian Journal of Psychology     Hybrid Journal   (Followers: 16)
Australian Psychologist     Hybrid Journal   (Followers: 11)
Autism Research     Hybrid Journal   (Followers: 31)
Autism Research and Treatment     Open Access   (Followers: 29)
Autism's Own     Open Access  
Autism-Open Access     Open Access   (Followers: 5)
Avaliação Psicológica     Open Access  
Avances en Psicologia Latinoamericana     Open Access   (Followers: 1)
Aviation Psychology and Applied Human Factors     Hybrid Journal   (Followers: 17)
Balint Journal     Hybrid Journal   (Followers: 3)
Barbaroi     Open Access  
Basic and Applied Social Psychology     Hybrid Journal   (Followers: 31)
Behavior Analysis in Practice     Full-text available via subscription   (Followers: 6)
Behavior Analysis: Research and Practice     Full-text available via subscription   (Followers: 2)
Behavior Analyst     Hybrid Journal   (Followers: 3)
Behavior Modification     Hybrid Journal   (Followers: 9)
Behavior Research Methods     Hybrid Journal   (Followers: 17)
Behavior Therapy     Hybrid Journal   (Followers: 45)
Behavioral Development Bulletin     Full-text available via subscription  
Behavioral Interventions     Hybrid Journal   (Followers: 7)
Behavioral Neuroscience     Full-text available via subscription   (Followers: 49)
Behavioral Sciences & the Law     Hybrid Journal   (Followers: 20)
Behavioral Sleep Medicine     Hybrid Journal   (Followers: 6)
Behaviour     Hybrid Journal   (Followers: 13)
Behaviour Research and Therapy     Hybrid Journal   (Followers: 17)
Behavioural and Cognitive Psychotherapy     Hybrid Journal   (Followers: 110)
Behavioural Processes     Hybrid Journal   (Followers: 6)
Biofeedback     Hybrid Journal   (Followers: 4)
BioPsychoSocial Medicine     Open Access   (Followers: 6)
BMC Psychology     Open Access   (Followers: 15)
Body, Movement and Dance in Psychotherapy: An International Journal for Theory, Research and Practice     Hybrid Journal   (Followers: 9)
Boletim Academia Paulista de Psicologia     Open Access  
Boletim de Psicologia     Open Access  
Brain Informatics     Open Access   (Followers: 1)
British Journal of Clinical Psychology     Full-text available via subscription   (Followers: 123)
British Journal of Developmental Psychology     Full-text available via subscription   (Followers: 35)
British Journal of Educational Psychology     Hybrid Journal   (Followers: 31)
British Journal of Health Psychology     Full-text available via subscription   (Followers: 42)
British Journal of Mathematical and Statistical Psychology     Full-text available via subscription   (Followers: 19)
British Journal of Psychology     Full-text available via subscription   (Followers: 56)
British Journal of Psychotherapy     Hybrid Journal   (Followers: 66)
British Journal of Social Psychology     Full-text available via subscription   (Followers: 31)
Burnout Research     Open Access   (Followers: 7)
Cadernos de psicanálise (Rio de Janeiro)     Open Access  
Cadernos de Psicologia Social do Trabalho     Open Access  
Canadian Art Therapy Association     Hybrid Journal  
Canadian Journal of Behavioural Science     Full-text available via subscription   (Followers: 6)
Canadian Journal of Experimental Psychology     Full-text available via subscription   (Followers: 11)
Canadian Psychology / Psychologie canadienne     Full-text available via subscription   (Followers: 10)
Cendekia : Jurnal Kependidikan dan Kemasyarakatan     Open Access  
Child Development Perspectives     Hybrid Journal   (Followers: 26)
Child Development Research     Open Access   (Followers: 13)
Ciencia Cognitiva     Open Access   (Followers: 2)
Ciencia e Interculturalidad     Open Access  
Ciências & Cognição     Open Access  
Ciencias Psicológicas     Open Access  
Clínica y Salud     Open Access  
Clinical Medicine Insights : Psychiatry     Open Access   (Followers: 9)
Clinical Practice in Pediatric Psychology     Full-text available via subscription   (Followers: 10)
Clinical Psychological Science     Hybrid Journal   (Followers: 11)
Clinical Psychologist     Hybrid Journal   (Followers: 15)
Clinical Psychology & Psychotherapy     Hybrid Journal   (Followers: 67)
Clinical Psychology and Special Education     Open Access   (Followers: 1)
Clinical Psychology Review     Hybrid Journal   (Followers: 33)
Clinical Psychology: Science and Practice     Hybrid Journal   (Followers: 20)
Clinical Schizophrenia & Related Psychoses     Full-text available via subscription   (Followers: 8)
Coaching Psykologi - The Danish Journal of Coaching Psychology     Open Access   (Followers: 1)
Cogent Psychology     Open Access  
Cógito     Open Access  
Cognition & Emotion     Hybrid Journal   (Followers: 36)
Cognitive Behaviour Therapy     Hybrid Journal   (Followers: 14)
Cognitive Neuropsychology     Hybrid Journal   (Followers: 26)
Cognitive Psychology     Hybrid Journal   (Followers: 58)
Consciousness and Cognition     Hybrid Journal   (Followers: 26)
Construção Psicopedagógica     Open Access  
Consulting Psychology Journal : Practice and Research     Full-text available via subscription   (Followers: 3)
Contagion : Journal of Violence, Mimesis, and Culture     Full-text available via subscription   (Followers: 8)
Contemporary Educational Psychology     Hybrid Journal   (Followers: 21)
Contemporary School Psychology     Hybrid Journal   (Followers: 4)
Contextos Clínicos     Open Access  
Counseling Outcome Research and Evaluation     Hybrid Journal   (Followers: 10)
Counseling Psychologist     Hybrid Journal   (Followers: 14)
Counseling Psychology and Psychotherapy     Open Access   (Followers: 7)
Counselling and Psychotherapy Research : Linking research with practice     Hybrid Journal   (Followers: 19)
Counselling and Values     Hybrid Journal   (Followers: 2)
Counselling Psychology Quarterly     Hybrid Journal   (Followers: 10)
Couple and Family Psychoanalysis     Full-text available via subscription   (Followers: 1)
Couple and Family Psychology : Research and Practice     Full-text available via subscription   (Followers: 4)
Creativity Research Journal     Hybrid Journal   (Followers: 20)
Creativity. Theories - Research - Applications     Open Access   (Followers: 1)
Criminal Justice Ethics     Hybrid Journal   (Followers: 6)
Cuadernos de Neuropsicología     Open Access   (Followers: 1)
Cuadernos de Psicologia del Deporte     Open Access  
Cuadernos de Psicopedagogía     Open Access  
Cultural Diversity and Ethnic Minority Psychology     Full-text available via subscription   (Followers: 12)
Cultural-Historical Psychology     Open Access  
Culturas Psi     Open Access  
Culture and Brain     Hybrid Journal   (Followers: 3)
Current Addiction Reports     Hybrid Journal   (Followers: 9)
Current Behavioral Neuroscience Reports     Hybrid Journal   (Followers: 2)
Current Directions In Psychological Science     Hybrid Journal   (Followers: 46)
Current Opinion in Behavioral Sciences     Hybrid Journal   (Followers: 1)
Current Opinion in Psychology     Hybrid Journal   (Followers: 3)
Current Psychological Research     Hybrid Journal   (Followers: 13)
Current Psychology     Hybrid Journal   (Followers: 14)
Current psychology letters     Open Access   (Followers: 2)
Current Research in Psychology     Open Access   (Followers: 20)
Cyberpsychology, Behavior, and Social Networking     Hybrid Journal   (Followers: 13)
Decision     Full-text available via subscription   (Followers: 2)
Depression and Anxiety     Hybrid Journal   (Followers: 14)
Depression Research and Treatment     Open Access   (Followers: 13)
Developmental Cognitive Neuroscience     Open Access   (Followers: 16)
Developmental Neuropsychology     Hybrid Journal   (Followers: 15)
Developmental Psychobiology     Hybrid Journal   (Followers: 9)
Developmental Psychology     Full-text available via subscription   (Followers: 44)
Diagnostica     Hybrid Journal   (Followers: 2)
Dialectica     Hybrid Journal   (Followers: 1)
Discourse     Full-text available via subscription   (Followers: 8)
Diversitas: Perspectivas en Psicologia     Open Access  
Drama Therapy Review     Hybrid Journal   (Followers: 1)
Dreaming     Full-text available via subscription   (Followers: 11)
Drogues, santé et société     Full-text available via subscription  
Dynamics of Asymmetric Conflict: Pathways toward terrorism and genocide     Hybrid Journal   (Followers: 12)
E-Journal of Applied Psychology     Open Access   (Followers: 7)
Ecopsychology     Hybrid Journal   (Followers: 6)
ECOS - Estudos Contemporâneos da Subjetividade     Open Access  
Educational Psychology Review     Hybrid Journal   (Followers: 25)
Educational Psychology: An International Journal of Experimental Educational Psychology     Hybrid Journal   (Followers: 46)
Educazione sentimentale     Full-text available via subscription  
Electronic Journal of Research in Educational Psychology     Open Access   (Followers: 6)
Elpis - Czasopismo Teologiczne Katedry Teologii Prawosławnej Uniwersytetu w Białymstoku     Open Access  
Emotion     Full-text available via subscription   (Followers: 33)
Emotion Review     Hybrid Journal   (Followers: 17)
En-Claves del pensamiento     Open Access   (Followers: 1)
Enseñanza e Investigacion en Psicologia     Open Access  
Epiphany     Open Access   (Followers: 3)
Escritos de Psicología : Psychological Writings     Open Access   (Followers: 2)

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Journal Cover Asia-Pacific Psychiatry
  [SJR: 0.377]   [H-I: 7]   [3 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1758-5864 - ISSN (Online) 1758-5872
   Published by John Wiley and Sons Homepage  [1587 journals]
  • Barriers and facilitators for psychiatrists in managing mental health
           patients in Hong Kong—Impact of Chinese culture and health system
    • Authors: Kai Sing Sun; Tai Pong Lam, Kwok Fai Lam, Tak Lam Lo
      Abstract: IntroductionThis study investigated the barriers and facilitators for psychiatrists in managing mental health patients under a Chinese context and a mixed private-public health system.MethodsTwo focus group interviews were conducted to explore the in-depth opinions of psychiatrists in Hong Kong. The themes identified from the focus groups were investigated in a questionnaire survey with data from 83 psychiatrists working in public and private sectors.ResultsNo insurance coverage of mental health problems, patients' poor compliance of medication, and stigma of seeing psychiatrists were rated as the top barriers in the survey. Some psychiatrists mentioned in focus groups that they might write down the associated physical symptoms of the patients rather than the mental disorder diagnoses on the medical certificate. They observed some patients suspecting that psychiatric drugs were prescribed to control their behavior and make them more muddleheaded. The survey also found that consultation time constraint, long patient waiting list, and difficulty in discharging patients to primary care mostly affected public psychiatrists rather than private ones. However, they perceived similar facilitators, including public campaign to promote positive results of help-seeking, adequate explanation by other health professionals to the patients before referrals, handling severe cases by casework approach, and having a regular primary care physician.DiscussionThe top barriers are related to insufficient public awareness and negative attitudes towards mental illness and its treatment. Major solutions include promoting positive results of help seeking, enhancing collaboration with primary care physicians, and follow-up of severe cases by a casework approach.
      PubDate: 2017-03-28T08:55:22.672254-05:
      DOI: 10.1111/appy.12279
       
  • Validation of an informant-based cognitive screening tool for Parkinson
           disease
    • Authors: Kok-Yoon Chee; Kheng-Yee Ong, Chin-Yeat Mak, Sapini Yacob, Shen-Cheng Yeo, Nathisha Thrichelam, Deepa Darshini Amarnath, Kai-Shin Thong, Chee-Hoong Moey, Thanam Ponusamy, Shanthi Viswanathan, Santhi Puvanarajah
      Abstract: IntroductionThe objective of this study was to establish the psychometric properties of the AD8 Dementia Screening Interview in patients with Parkinson disease (PD) with or without cognitive impairment using the Montreal Cognitive Assessment Tool (MoCA) for comparison.MethodsThe AD8 was translated into Malay for Malay-speaking participants. A correlation analysis and a receiver operator characteristic curve were generated to establish the psychometric properties of the AD8 in relation to the MoCA.ResultsOne hundred fifty patients and their caretakers completed the AD8 and MoCA. Using a cutoff score of 1/8, the AD8 had 81% sensitivity and 59% specificity for the detection of cognitive impairment in PD. With a cutoff score of 2/8, the AD8 had 83% specificity and 64% sensitivity. The area under the receiver operator characteristic curve was 80%, indicating good-to-excellent discriminative ability.DiscussionThese findings suggest that the AD8 can reliably differentiate between cognitively impaired and cognitively normal patients with PD and is a useful caregiver screening tool for PD.
      PubDate: 2017-03-21T22:01:39.900171-05:
      DOI: 10.1111/appy.12278
       
  • Comparison of treatment patterns in schizophrenia between China and Japan
           (2001-2009)
    • Authors: Yu-Tao Xiang; Takahiro A. Kato, Taishiro Kishimoto, Gabor S. Ungvari, Helen F.K. Chiu, Tian-Mei Si, Shu-Yu Yang, Senta Fujii, Chee H. Ng, Naotaka Shinfuku
      Abstract: IntroductionTo date no study has compared the treatment patterns for schizophrenia specifically between China and Japan. This study examined the cross-national differences in the use of psychotropic drugs and electroconvulsive therapy (ECT) in schizophrenia.MethodData on 3248 schizophrenia inpatients (n = 1524 in China and n = 1724 in Japan) were collected by either chart review or interviews during the designated 3 study periods between 2001 and 2009. Patients' socio-demographic and clinical characteristics, prescriptions of psychotropic drugs, and ECT use were recorded using a standardized protocol and data collection procedure.ResultsMultivariate analyses revealed that compared to their Japanese counterparts, Chinese inpatients had a shorter length of current hospitalization, were significantly less frequently prescribed second-generation antipsychotics (except clozapine), antipsychotic polypharmacy, benzodiazepines, and mood stabilizers, and more likely to receive clozapine, antidepressants, and ECT.DiscussionSubstantial variations in inpatient treatment patterns for schizophrenia were found between China and Japan. The common use of ECT and clozapine in Chinese inpatients and the frequent use of antipsychotic polypharmacy and high antipsychotic doses in Japanese inpatients need to be addressed.
      PubDate: 2017-02-20T22:30:26.664466-05:
      DOI: 10.1111/appy.12277
       
  • Issue Information
    • Abstract: No abstract is available for this article.
      PubDate: 2017-02-01T18:36:06.437491-05:
      DOI: 10.1111/appy.12256
       
  • Decreased blood urea nitrogen reveals polydipsia in a vegetarian with
           schizophrenia
    • Authors: Hsuan-Te Chu; Pei-Shen Ho, Yao-Wen Liu, Chih-Sung Liang
      PubDate: 2017-02-01T18:36:05.713012-05:
      DOI: 10.1111/appy.12263
       
  • H∞ Preview Control of A Class of Uncertain Discrete-Time Systems
    • Authors: Li Li; Fucheng Liao, Jiamei Deng
      Abstract: This paper investigates the problem of H∞ preview tracking control with robust performance for uncertain discrete-time systems. In order to avoid applying the difference operator to the time-varying matrix, by taking advantage of the difference between the system state variables, input variables, and the corresponding auxiliary variables, instead of the usual difference between system states, an augmented error system including previewed information is constructed, which converts the tracking problem into a regulator problem. A sufficient condition based on the free-weighting matrices technique and the Lyapunov stability theory is derived for the robust asymptotic stability of uncertain systems. Moreover, a state feedback control law with preview action design method is obtained via the linear matrix inequality approach. Based on these, a state observer for preview control systems is formulated. Previewable reference signals are fully utilized through reformulation of the output equation while designing the state observer. The proposed construction method of augmented error system is applicable to uncertain discrete-time systems in which the uncertainties are general. Also an integrator is introduced to ensure the closed-loop system tracking performance with no static error. The numerical results also show the effectiveness of the preview control law for uncertain systems in the paper.
      PubDate: 2017-01-27T05:21:00.315188-05:
      DOI: 10.1002/asjc.1466
       
  • Early menarche and risk-taking behavior in Korean adolescent students
    • Authors: Hyun Soo Kim; Byeong Moo Choe, Jae Hong Park, Seong Hwan Kim
      Abstract: IntroductionThe aim of this study is to assess the correlation between early menarche and risk-taking behavior in a representative sample of Korean adolescent students.MethodsData were drawn from a cross-sectional, nationally representative sample of 33 829 female adolescents (grades 7-12) from the 2014 Korean Youth Risk Behavior Web-based Survey. Logistic regression analysis was conducted to test the association between early menarche and risk-taking behavior.ResultsFemale adolescents who experienced menarche at an earlier age tended to have an earlier initiation of sexual intercourse (odds ratio [OR] 4.61, 95% CI, 3.05-6.98, P = .001), smoking (OR 4.29, 95% CI, 3.75-4.9, P 
      PubDate: 2017-01-27T04:23:14.039652-05:
      DOI: 10.1111/appy.12273
       
  • Gender differences in exposure and vulnerability to psychosocial and
           behavioral factors of suicide attempt among Korean adolescents
    • Authors: Gyeong-Suk Jeon; Kyungwon Choi, Sung-il Cho
      Abstract: IntroductionThis study examined gender differences in suicide attempts and their association with exposure and vulnerability to psychosocial, behavioral, and structural factors among Korean adolescents.MethodsData of 74 854 adolescents, taken from the 2010 Korea Youth Risk Behavior Survey, were used. Logistic regression analysis was used to assess the contribution of differential exposure to psychosocial, behavioral, and structural factors for gender differences of suicidal attempt.ResultsGender differences were observed in the degree of exposure to the various factors. Females were more likely to report psychosocial problems, whereas males were more likely to report experience of smoking and drinking alcohol and to engage in vigorous physical activity. Stress and unhappiness were significantly associated with suicide attempts in both males and females, and gender differences in these variables were nonsignificant. Depressive symptoms were associated with a higher risk of suicide attempts, and this relationship was significantly stronger for males. The effects of cigarette smoking and risky drinking were significantly stronger in females.DiscussionGreater exposure to perceived stress, feelings of unhappiness, depression, and higher vulnerability of smoking and heavy drinking accounted for higher suicide attempts of female adolescents. Higher exposure to health-related behaviors and greater vulnerability to depressive symptoms in male were also noted. In conclusion, differences in exposure and vulnerability to psychosocial and behavioral factors may partly explain gender differences in suicide attempts among Korean adolescents.
      PubDate: 2017-01-27T04:17:03.073194-05:
      DOI: 10.1111/appy.12272
       
  • Adaptive Impulsive Observers for a Class of Switched Nonlinear Systems
           with Unknown Parameter
    • Authors: Jinghan Li; Ruicheng Ma, Georgi M. Dimirovski
      Abstract: This work investigates and solves the design of adaptive impulsive observers for a class of uncertain switched nonlinear systems with unknown parameter. Sufficient conditions are derived for designing such observers for each subsystem to reconstruct asymptotically and update system states in real time. The state observer is represented in terms of impulsive differential equations. The parameter estimation law is modelled by an impulse-free, time-varying differential equation associated with the impulse time sequence in order to determine when the observer estimated state is updated. The asymptotic convergence to zero of the observation errors is established by applying the method of multiple time-varying Lyapunov functions. Sufficient conditions are derived that guarantee the convergence of parameter estimation. An example of switched Lorenz system along with numeric and simulation results is presented to demonstrate the effectiveness of the proposed method.
      PubDate: 2017-01-23T02:25:48.088156-05:
      DOI: 10.1002/asjc.1464
       
  • Pattern Recognition Based Dynamics Description of Production Processes in
           Metric Spaces
    • Authors: Mushu Wang; Zhengguang Xu, Lingli Guo
      Abstract: A new type of modeling method is put forward based on pattern recognition (PR) technology for some industrial production processes. The proposed method is a pure data-driven modeling method since the model is independent of the controlled plant, and it is based on the measured input and output (I/O) data of the controlled plant in a closed loop. Different from the traditional modeling method, the system dynamics is described by I/O classes, which are obtained from raw I/O data through partitioning of the data space respectively and I/O orders of the model resort to the conditional entropy. The covering algorithm based pattern classification (PC) is used to establish the mapping between input and output of the proposed model in metric spaces. The experimental results illustrate the feasibility of the modeling method.
      PubDate: 2017-01-20T13:40:36.578572-05:
      DOI: 10.1002/asjc.1471
       
  • Output Feedback Robust MPC Based on Off-line Observer for LPV Systems via
           Quadratic Boundedness
    • Authors: Xubin Ping
      Abstract: For the linear parameter varying (LPV) system with available scheduling parameter and bounded disturbance, a synthesis approach to output feedback robust model predictive control (OFRMPC) is considered. By applying the technique of quadratic boundedness, the on-line method with the refreshment of the bounds of estimation error guarantees the robust stability of the augmented closed-loop system. For reducing the on-line computational burden, the look-up table that stores off-line optimized control laws and the corresponding regions of attraction is constructed. The on-line control law is searched based on the bounds of estimation error set and the region of attraction with the closest containment of the real-time estimated state. A continuous stirred tank reactor (CSTR) model is given to illustrate the effectiveness of the method.
      PubDate: 2017-01-20T13:30:37.222195-05:
      DOI: 10.1002/asjc.1469
       
  • Weighted Pseudo Anti-Periodic Solutions for Cellular Neural Networks with
           Mixed Delays
    • Authors: Qiyuan Zhou
      Abstract: A model of cellular neural networks with mixed delays is proposed. Applying contraction mapping fixed point theorem and differential inequality technique, several sufficient conditions are derived to ensure the existence and exponential stability of weighted pseudo anti-periodic solutions for the proposed neural networks. Finally, a numerical simulation example is given to illustrate the effectiveness of the obtained results.
      PubDate: 2017-01-20T13:30:28.280442-05:
      DOI: 10.1002/asjc.1468
       
  • Approximation Optimal Vibration for Networked Nonlinear Vehicle Active
           Suspension with Actuator Time Delay
    • Authors: Shi-Yuan Han; Cheng-Hui Zhang, Gong-You Tang
      Abstract: This paper is concerned with the modelling and vibration control problem for networked nonlinear vehicle active suspension (NNVAS) with actuator time delay. Inserting in-vehicle communication network to active suspension, a novel model for NNVAS is established based on the Takagi-Sugeno fuzzy fusion technology first. By introducing a transformation vector, NNVAS with actuator time delay is reformed as a delay-free nonlinear system. Then, an approximation optimal vibration controller (AOVC) is proposed by using an iterative algorithm, which consists of suspension state item, a road disturbance state item, and a compensated item for nonlinear response. Dependant on the control performance in each iteration, the computability of proposed AOVC is realized. A reduced-order observer is designed to solve the physical unrealizable problem of road disturbances. Finally, compared with the open-loop system and H∞ control scheme without network setting, the capability of improving control performance under AOVC is illustrated.
      PubDate: 2017-01-20T13:25:34.969238-05:
      DOI: 10.1002/asjc.1419
       
  • Stable Delayed Bilateral Teleoperation of Mobile Manipulators
    • Authors: Diego D. Santiago; Emanuel Slawiñski, Vicente A. Mut
      Abstract: This paper proposes a control scheme for a stable teleoperation of non-holonomic mobile manipulator robots. This configuration presents high-coupled dynamics and motion redundancy. The problem approached in this work is the teleoperation of the end effector velocity of the Mobile Manipulator, while system redundancy is used to achieve secondary control objectives. We considered variable asymmetric time delays as well as non-passive models of operator and environment. From this study, it is possible to infer the control parameters, depending on the time delay, in order to assure stability. Finally, the performance of the delayed teleoperation system is evaluated through simulations of human-in-the-loop internet teleoperation.
      PubDate: 2017-01-20T06:06:08.380029-05:
      DOI: 10.1002/asjc.1461
       
  • Applicability of the Chinese version of the Personal and Social
           Performance scale in patients with severe mental disorders
    • Authors: Ying Qiao; Shen He, Liang Su, Jian-Zheng Zhu, Jian-Hua Sheng, Hua-Fang Li
      Abstract: IntroductionThis study was designed to determine the reliability and validity of the Chinese version of the Personal and Social Performance scale (PSP-CHN) and assess the applicability of using the PSP-CHN in patients with severe mental disorders.MethodsA total of 285 outpatients with severe mental disorders, 220 with schizophrenia and 65 with major depressive disorder, were enrolled into the study. Both diagnoses were made using the DSM-IV. All the patients were assessed with the PSP-CHN, the GAF, and the CGI-S. In addition, the PANSS and the MADRS were used to assess the patients with schizophrenia and major depressive disorder, respectively.ResultsThe PSP-CHN showed good internal consistency (Cronbach α = 0.839, n = 285), high interrater reliability for total scores (intraclass correlation coefficient, ICC = 0.865, n = 48), and good test-retest reliability (ICC = 0.892, n = 130). The PSP-CHN total score showed a statistically significant positive correlation with the GAF score (r = 0.927, P 
      PubDate: 2017-01-16T23:50:29.809851-05:
      DOI: 10.1111/appy.12271
       
  • ZD, ZG and IOL Controllers and Comparisons for Nonlinear System Output
           Tracking with DBZ Problem Conquered in Different Relative-Degree Cases
    • Authors: Jian Li; Mingzhi Mao, Yunong Zhang, Dechao Chen, Yonghua Yin
      Abstract: This paper considers the output tracking control of general-form single-input single-output (SISO) nonlinear system, which may encounter the problem of division by zero (DBZ). First, via the Zhang dynamics (ZD) method, a ZD controller is proposed. Then, based on the ZD controller with the aid of gradient dynamics (GD) method, a Zhang-gradient (ZG) controller is proposed. For comparison, the conventional input-output linearization (IOL) controller is presented. The ZD, ZG and IOL controllers are compared in different relative-degree cases (i.e., the standard relative-degree case, the loose relative-degree case and the DBZ relative-degree case). Note that the ZG controller is valid in three relative-degree cases, while the ZD and IOL controllers are valid only in the standard relative-degree case and the loose relative-degree case. In addition, performances of ZD and ZG controllers are guaranteed via theoretical analyses and computer simulations for the output tracking of general-form nonlinear system with the DBZ problem conquered.
      PubDate: 2017-01-13T10:00:53.393602-05:
      DOI: 10.1002/asjc.1460
       
  • The Controllability of Fractional Damped Stochastic Integrodifferential
           Systems
    • Authors: T. Sathiyaraj; P. Balasubramaniam
      Abstract: In this paper, the complete controllability is investigated for nonlinear fractional damped stochastic integrodifferential system in finite dimensional space. Using linear controllability theory, sufficient conditions ensuring complete controllability are derived based on controllability Grammian matrix which is defined by Mittag-Leffler matrix function and fixed-point techniques. Finally, two numerical examples are given to verify the proposed conditions.
      PubDate: 2017-01-13T09:56:00.252852-05:
      DOI: 10.1002/asjc.1453
       
  • NON-PDC Observer-Based T-S Fuzzy Tracking Controller Design and its
           Application in CHAOS Control
    • Authors: Mohammad Hassan Asemani; Ramin Vatankhah
      Abstract: In many mechanical devices with chaotic behavior, stabilizing unstable periodic orbits (UPOs) of the system has positive effects in the lifetime and effectiveness of these devices. In this study, a new non-parallel distributed compensation (non-PDC) observer-based tracking controller is presented for Takagi–Sugeno fuzzy systems to control the chaotic behavior of such systems. Asymptotic stability synthesis of the closed-loop system is investigated using a fuzzy Lyapunov function to derive less conservative conditions than common quadratic Lyapunov function-based approaches. To tackle the main drawback of the fuzzy Lyapunov-based approaches, which assume some upper bounds on the derivatives of the fuzzy grade functions, we propose a new procedure by considering a constraint on the control signal. The new design conditions are given in the form of linear matrix inequalities (LMIs). The proposed control structure is applied to spinning disks in which chaos phenomena appear in lateral vibration. Simulation results are given to show the applicability of the proposed tracker to the UPO problem.
      PubDate: 2017-01-12T03:11:00.512042-05:
      DOI: 10.1002/asjc.1451
       
  • Robust Stability and Stabilization Of TCP-Networked Control Systems with
           Multiple Delay System Modeling
    • Authors: Masoumeh Azadegan; Mohammad T. H. Beheshti
      Abstract: This paper presents a new model for networked control systems (NCSs) under transmission control protocol (TCP) as a multiple-delay system by considering both sensor to controller and controller to actuator delays. An analytical TCP model has been considered for the network part, and an active queue management (AQM) controller is designed to regulate the desired queue length, which ensures holding the network induced delay and its variation within their lower bounds. The model is assumed to possess structured uncertainties due to the stochastic nature of the network. Robust stability and stabilization conditions are derived in terms of linear matrix inequalities (LMIs) by applying the Lyapunov-Krasovskii stability criterion. Illustrative examples are presented and it has been shown that the proposed method will obtain less conservative results compared to the existing approaches in the literature.
      PubDate: 2017-01-12T03:06:15.908082-05:
      DOI: 10.1002/asjc.1435
       
  • Adaptive Control Scheme for Large-Scale Interconnected Systems Described
           by Hammerstein Models
    • Authors: Mourad Elloumi; Samira Kamoun
      Abstract: This paper proposes an adaptive algorithm for the online control of discrete-time large-scale nonlinear systems, which reduces the noise effects acting on the system output (regulation problem) and allows the system output to keep track of a time-varying trajectory (tracking problem). We consider a large-scale nonlinear system that can be decomposed into single-input single-output (SISO) interconnected nonlinear subsystems with known structure variables (orders, delays) and unknown time-varying parameters. Each interconnected subsystem is described by block-oriented models, specifically a discrete-time Hammerstein model. Parameter adaptation is performed using a recursive parametric estimation algorithm based on the adjustable model method and the least squares techniques. Simulation results of an interconnected petroleum process are provided to demonstrate the effectiveness of the developed control scheme.
      PubDate: 2017-01-12T03:06:11.569131-05:
      DOI: 10.1002/asjc.1443
       
  • Mixed-Objective Robust Dynamic Output Feedback Controller Synthesis for
           Continuous-Time Polytopic Lpv Systems
    • Authors: Wei Jiang; Hongli Wang, Jinghui Lu, Guangbin Cai, Weiwei Qin
      Abstract: A robust dynamic output feedback controller synthesis algorithm considering H∞/H2 performance and regional pole placement is addressed for a nonlinear system with parameter uncertainties and external disturbance. First, the formulation of a gain-scheduled mixed-objective robust dynamic output feedback controller for continuous-time polytopic linear parameter varying (LPV) systems is presented. To reduce conservativeness, some auxiliary slack variables and parameter-dependent Lyapunov functions are employed in addition to well-established performance conditions. Then, sufficient conditions for the desired gain-scheduled mixed-objective robust dynamic output feedback controllers are cast into an efficiently tractable finite-dimensional convex optimization problem in terms of linear matrix inequalities (LMIs). Finally, numerical simulation shows the validity of the proposed controller, which has good stability, strong robustness, satisfied disturbance attenuation ability, and smooth dynamic properties.
      PubDate: 2017-01-12T03:05:54.344376-05:
      DOI: 10.1002/asjc.1440
       
  • Structural Properties of Networked Control Systems With Bandwidth
           Limitations and Delays
    • Authors: Mohammad Mahdi Share Pasand; Mohsen Montazeri
      Abstract: The structural properties of networked control systems with both bandwidth limitations and delays are investigated. Sufficient conditions are given for controllability (stabilizability) and reconstructibility (detectability). Our results enhance previous works by capturing bandwidth limitations and delays simultaneously. The adopted modeling framework could be readily used in control and estimation methods, including optimal and predictive schemes. It also facilitates the use of scheduling optimization algorithms in conjunction with the control scheme presented.
      PubDate: 2017-01-12T03:00:53.517101-05:
      DOI: 10.1002/asjc.1447
       
  • Distributed Three-Dimensional Formation Containment Control of Multiple
           Unmanned Aerial Vehicle Systems
    • Authors: Tao Han; Ming Chi, Zhi-Hong Guan, Bin Hu, Jiang-Wen Xiao, Yuehua Huang
      Abstract: This paper concentrates the distributed formation containment problems for multiple unmanned aerial vehicle (UAV) systems under both fixed directed and switching directed topologies. The objective is to introduce the formation control into the containment control research, where master UAVs should exchange information with each other to achieve and maintain a desired formation. Then, two different control protocols are proposed for the master UAVs and slave UAVs, respectively. Utilizing the algebraic graph theory and stability theory, some sufficient conditions are derived to guarantee the master UAVs complete a prespecified formation, while the states of the slave UAVs converge to a convex hull formed by those of the master UAVs. Finally, some numerical simulations are provided to verify the effectiveness of the theoretical results.
      PubDate: 2017-01-11T07:46:38.881739-05:
      DOI: 10.1002/asjc.1445
       
  • Membership Function Dependent Observer-Based Controller Design for A T-S
           Fuzzy System
    • Authors: Wen-Bo Xie; Yu-Long Wang, Jian Zhang, Ling Huang
      Abstract: The problems of observer-based feedback control and stability analysis for a T-S fuzzy system are investigated in this paper. Based on system output variable, a membership function dependent observer and a controller subject to observer errors are constructed to estimate the unknown system state and establish the closed-loop feedback control system. The derived stability criteria, which is not numerically solvable, is converted to a solvable optimization problem. An improved membership function dependent approach is proposed to reduce the conservativeness. The approximated values of membership functions and their derivatives are calculated based on the proposed piecewise-function method. Then, a piecewise decaying rate setting technique is presented to adjust the error convergent speed. A three-rule fuzzy system stability analysis example is given to show the conservativeness reduction effects, while an inverted pendulum cart control process is used to show the effectiveness of the proposed observer-based control scheme.
      PubDate: 2017-01-06T05:06:02.684201-05:
      DOI: 10.1002/asjc.1459
       
  • Model Reduction of Large Scale Descriptor Systems Using Time Limited
           Gramians
    • Authors: Khawaja Shafiq Haider; Abdul Ghafoor, Muhammad Imran, Fahad Mumtaz Malik
      Abstract: A new technique for model order reduction of large scale continuous linear time invariant descriptor systems in limited time interval is proposed. The concept of time limited Gramians for descriptor systems is introduced for applications involving analysis, design or optimization in specific time interval. Balanced truncation based on magnitudes of Hankel singular values of the computed Gramians is performed to obtain the reduced order models in limited time interval. An approximate solution of time limited projected Lyapunov equations is developed and Cholesky factorisation of time limited Gramians is performed. Moreover, stability conditions for reduced order system are stated and two algorithms for stability preservation of reduced order models are presented. Results certify the successful application of the proposed techniques.
      PubDate: 2017-01-06T04:45:42.908694-05:
      DOI: 10.1002/asjc.1444
       
  • Crossed Synchronization of Multiple Subnets Complex Network System with
           Time-Varying Delay
    • Authors: Zhou Bi-feng; Lou Yi-ping, Zhong Yao-xiang
      Pages: 606 - 613
      Abstract: A dual-time varying delay complex network system is formed by a plurality of sub-networks. This paper discusses the crossed synchronization stability of such systems on the basis of crossed synchronization definition between the sub-nets. By the Lyapunov stability theory with the Zero Theorem, we obtained a sufficient condition that a synchronization exponentially stable controller exists in the complex network system, with characteristic variable delay. The relationship between the complex network nodes are discussed, and the two nodes must be connected and can interact with each other so it has the actual coupling strength. Finally, combining the given conditions, a numerical simulation illustrates its effectiveness.
      PubDate: 2017-01-06T04:45:29.151383-05:
      DOI: 10.1002/asjc.1421
       
  • Effectiveness of the repeated administration of scopolamine ointment on
           clozapine-induced hypersalivation in patients with treatment-resistant
           schizophrenia: A preliminary study
    • Authors: Ippei Takeuchi; Manako Hanya, Junji Uno, Kiyoshi Fujita, Hiroyuki Kamei
      Abstract: IntroductionThis study investigated the efficacy of scopolamine (an anticholinergic agent) ointment against clozapine-induced hypersalivation.MethodsThe patients enrolled in this study consisted of 10 clozapine-treated schizophrenia patients and 10 healthy adult men. A prospective, randomized, double-blind, crossover, placebo-controlled clinical trial was designed.ResultsA total of 10 patients and 10 healthy adult men completed the study. No significant reduction in the saliva production of the clozapine-treated patients was observed; however, that of the healthy adult men decreased significantly.DiscussionScopolamine ointment was not effective against clozapine-induced hypersalivation. A further study is necessary for confirming its effect.
      PubDate: 2016-12-19T14:50:23.32993-05:0
      DOI: 10.1111/appy.12269
       
  • Early improvement predicts 8-week treatment outcome in patients with
           generalized anxiety disorder treated with escitalopram or venlafaxine
    • Authors: Mincai Qian; Zhongxia Shen, Min Lin, Tiefeng Guan, Jianhong Yang, Liang Li, Xinhua Shen, Yonggui Yuan
      Abstract: IntroductionTo investigate whether early improvement can predict 8-week treatment outcome in generalized anxiety disorder (GAD) patients.MethodsFor 8 weeks, 226 GAD patients were randomly treated with escitalopram or venlafaxine. Early improvement was defined as a ≧20% reduction from baseline in Hamilton anxiety rating scale at week 1 or 2. The positive and negative predictive values were calculated.ResultsThe positive and negative predictive values of early improvement in escitalopram or venlafaxine group at week 1 were (85.19%, 67.53%) vs (84.62%, 65.33%)DiscussionThe early improvement achieved within the first week treatment can predict a good 8-week treatment outcome in GAD patients.
      PubDate: 2016-12-19T14:50:21.39738-05:0
      DOI: 10.1111/appy.12270
       
  • Preliminary study of personality traits in Chinese lung cancer patients:
           Modification by neurotensin receptor 1 polymorphisms
    • Authors: Hui Ma; Zhengtu Cong, Hongyu Zhang, Jiangang Tao, Chao Yang, Zhijie Song
      Abstract: This study recruited 148 lung cancer patients and 157 healthy Chinese individuals to evaluate the personality traits of Chinese lung cancer patients using the Tridimensional Personality Questionnaire and to investigate the associations between these traits and the rs6090453C/G and rs6011914C/G polymorphisms of the neurotensin receptor 1 gene. The results demonstrated significant differences in the Tridimensional Personality Questionnaire total and subscale scores between the 2 groups. Significant differences were found in the reward dependence 2 (RD2) score between the rs6090453C/G genotypes and in the total harm avoidance (HA), HA1, HA2, HA4, and RD2 scores between the rs6011914C/G genotypes. Thus, patients with lung cancer have specific personality traits, and variations in the neurotensin receptor 1 gene may be involved in the biological mechanisms of the HA and RD personality traits.
      PubDate: 2016-11-28T03:30:22.4244-05:00
      DOI: 10.1111/appy.12268
       
  • Validity study of Patient Health Questionnaire-9 items for Internet
           screening in depression among Chinese university students
    • Authors: Na Du; Kexin Yu, Yan Ye, Shulin Chen
      Abstract: BackgroundInternet intervention in Chinese university students would be a possible approach to overcome the gap between high rate of depression and high rates of underdiagnosis and undertreatment. As a popular measure of screening, the feasibility and user satisfaction of Patient Health Questionnaire-9 items for online program were tested.MethodsThe subjects were enrolled based on an email list from the students' office of a Chinese university, and 300 undergraduate students were randomly invited of which 230 (76.7%) students were willing to participate in the study and completed the first test. After 2 weeks, a subsample of 150 (65.2%) subjects were randomly chosen to retake the test for the test-retest reliability. And 81 (35.2%) among the 230 subjects were randomly selected to undergo the Mini International Neuropsychiatric Interview within 48 hours. Among 150 subjects, 120 (52.2%) completed client satisfaction questionnaire about this online screening program.Results(1) The Cronbach alpha was 0.80 and the test-retest reliability was 0.78. (2) The optimal cutoff score of 10 revealed a sensitivity of 0.74 and specificity of 0.85, with an area under the curve of 0.897 (95% confidence interval, 0.823-0.970). (3) The mean duration of administration was 3.5 minutes. (4) Satisfaction with the online screening program was highly appreciated.ConclusionsThe results indicated potential value of the online screening program for further Internet-administrated programs of depression among Chinese university students.
      PubDate: 2016-11-07T03:55:49.022232-05:
      DOI: 10.1111/appy.12266
       
  • Perceptions of stigma and its correlates among patients with major
           depressive disorder: A multicenter survey from China
    • Authors: Feng Shi-Jie; Gao Hong-Mei, Wang Li, Wang Bin-Hong, Fang Yi-Ru, Wang Gang, Si Tian-Mei
      Abstract: BackgroundThe stigma of major depressive disorder (MDD) is an important public health problem. This study evaluated stigma in MDD patients in China using explanatory model interview catalogue (EMIC) questionnaire and the demographic and clinical symptom factors associated with the stigma of these patients.MethodsA total of 158 MDD patients from domestic 3 mental health centers were surveyed. We used the EMIC questionnaire to assess stigma of these patients, Montgomery and Asberg depression rating scale (MADRS) to assess depressive severity, self-reporting inventory (SCL-90) to assess mental health level, Sheehan disability scale (SDS) to assess social function, and fatigue severity scale (FSS) to assess degree of fatigue.ResultsThe stigma scores were significantly higher in the 18- to 30-year-old (z = 2.875, P = .024) and 31- to 40-year-old (z = 3.204, P = .008) groups than the 51- to 65-year-old group; in the full-time employment group than the retired group (z = 3.163, P = .016). The stigma scores exhibited significant negative correlation with age (r = −0.169, P = .034) but positive correlations with the scores of MADRS (r = .212, P = .007), total scores (r = .273, P = .001) and subscales of interpersonal sensitivity (r = .233, P = .003), depression (r = .336, P 
      PubDate: 2016-11-02T23:36:46.158134-05:
      DOI: 10.1111/appy.12260
       
  • Cortisol and ACTH levels in drug-naive adolescents with first-episode
           early onset schizophrenia
    • Authors: Şeref Şimşek; Salih Gençoğlan, Tuğba Yüksel, Hüseyin Aktaş
      Abstract: The aim of this study was to investigate serum levels of cortisol and adrenocorticotropic hormone in adolescents with first-episode early onset schizophrenia. A total of 23 adolescent patients, who did not receive prior therapy and who were diagnosed with psychosis according to DSM-IV, were included. Kiddie-Schedule for Affective Disorders and Schizophrenia-Present and Lifetime Version, Positive and Negative Symptom Scale, and Clinical Global Impression Scale were conducted with the participants. No significant differences were found between the patients and the control subjects in serum cortisol and adrenocorticotropic hormone levels (P > .05). Our study's findings do not support the hypothesis of increased hypothalamic-pituitary-adrenal axis activity in first-episode early onset schizophrenia.
      PubDate: 2016-11-02T01:05:42.06387-05:0
      DOI: 10.1111/appy.12264
       
  • Prescribing patterns of psychotropic medications and clinical features in
           patients with major depressive disorder with and without comorbid
           dysthymia in China
    • Authors: Yuan Feng; Sha Sha, Chen Hu, Gang Wang, Gabor S. Ungvari, Helen F.K. Chiu, Chee H. Ng, Tian-Mei Si, Da-Fang Chen, Yi-Ru Fang, Zheng Lu, Hai-Chen Yang, Jian Hu, Zhi-Yu Chen, Yi Huang, Jing Sun, Xiao-Ping Wang, Hui-Chun Li, Jin-Bei Zhang, Yu-Tao Xiang
      Abstract: IntroductionLittle has been reported about the demographic and clinical features of major depressive disorder (MDD) with comorbid dysthymia in Chinese patients. This study examined the frequency of comorbid dysthymia in Chinese MDD patients together with the demographic and clinical correlates and prescribing patterns of psychotropic drugs.MethodsConsecutively collected sample of 1178 patients with MDD were examined in 13 major psychiatric hospitals in China. Patients' demographic and clinical characteristics and psychotropic drugs prescriptions were recorded using a standardized protocol and data collection procedure. The diagnosis of dysthymia was established using the Mini International Neuropsychiatric Interview. Medications ascertained included antidepressants, antipsychotics, benzodiazepines, and mood stabilizers.ResultsOne hundred and three (8.7%) patients fulfilled criteria for dysthymia. In multiple logistic regression analyses, compared to non-dysthymia counterparts, MDD patients with dysthymia had more depressive episodes with atypical features including increased appetite, sleep, and weight gain, more frequent lifetime depressive episodes, and less likelihood of family history of psychiatric disorders. There was no significant difference in the pattern of psychotropic prescription between the 2 groups.ConclusionsThere are important differences in the demographic and clinical features of comorbid dysthymia in Chinese MDD patients compared with previous reports. The clinical profile found in this study has implications for treatment decisions.
      PubDate: 2016-10-19T04:30:22.013707-05:
      DOI: 10.1111/appy.12261
       
  • Traditional Chinese medicine for schizophrenia: A survey of randomized
           trials
    • Authors: Hongyong Deng; Clive E. Adams
      Abstract: ObjectiveTo survey the reports of randomized trials of traditional Chinese medicine (TCM) interventions for schizophrenia and produce a broad overview of this type of research activity in this area.MethodWe searched the Cochrane Schizophrenia Group's comprehensive Trials Register (January 2016), selected all relevant randomized trials, and extracted the data within each study. Finally, we sought relevant reviews on the Cochrane Library.ResultsWe initially screened 423 articles from which we identified 378 relevant studies randomizing 35 341 participants (average study size 94, SD 60). There were 7 herbs used as single medicine, 4 compositions or extractions, more than 144 herbal mixes, and 7 TCM principles reported for schizophrenia. Nonpharmacological interventions of TCM included acupuncture and exercise. The most commonly evaluated treatments are Ginkgo biloba, acupuncture, Wendan decoction, and Shugan Jieyu Capsule. There are 3 directly relevant Cochrane reviews.ConclusionsMost treatment approaches—and some in common use—have only one or two relevant small trials. Some coordination of effort would help ensure that further well-designed appropriately sized randomized trials are conducted. Systematic reviews should be performed in this field but with titles that take into account the complexity of TCM.
      PubDate: 2016-10-13T00:18:23.586376-05:
      DOI: 10.1111/appy.12265
       
  • Prevalence of probable posttraumatic stress disorder and determination of
           its relationship with everyday functioning in children and adolescents by
           using generalized estimating equations
    • Authors: Ye Zhang; Jun Zhang, Shenyue Zhu, Changhui Du, Wei Zhang
      Abstract: IntroductionWe investigated the prevalence rates for probable PTSD and used generalized estimating equations to identify risk factors for probable PTSD in children and adolescents exposed to the Lushan earthquake.MethodsA total of 1623 participants completed 3 assessments, including the Children's Revised Impact of Event Scale, at 2 weeks, 3, and 6 months after experiencing the Lushan earthquake. Additionally, demographic variables and variables related to everyday functioning were evaluated at 2 weeks after the earthquake via a self-constructed questionnaire.ResultsThe percentages of children and adolescents who changed from having no PTSD to probable PTSD and probable PTSD to no PTSD at each time point were approximately 8% and 20% of the sample, respectively. The percentage of participants without PTSD increased from 41.1% at the 2-week to 3-month time point to 54.3% at the 3-month to 6-month time point, and the percentage with persistent probable PTSD decreased from 29.6% to 16.4% at the 2 time points, respectively. Female gender, a sedentary lifestyle, and actively helping others were significant risk factors for probable PTSD, whereas initiating communications with others, actively playing with classmates and friends, and the ability to concentrate on academic studies after resuming class were factors that helped protect against probable PTSD.DiscussionResistance to PTSD and persistent PTSD symptoms were both common occurrences in child and adolescent survivors. Specific variables related to everyday functioning may be risk factors for probable PTSD. These findings have implications for agencies that provide mental health services after an earthquake.
      PubDate: 2016-10-10T03:30:56.306555-05:
      DOI: 10.1111/appy.12262
       
  • The delaying effect of stigma on mental health help-seeking in Sri Lanka
    • Authors: Sunera M. Fernando; Frank P. Deane, Hamish J. McLeod
      Abstract: BackgroundMental health stigma has been associated with delays in seeking treatment.AimsTo describe perceived stigma experienced by patients and carers in Sri Lanka and to determine the effects of stigma on help-seeking delay.MethodsSurvey of outpatients and family carers (n = 118 dyads) attending two psychiatric hospitals in Sri Lanka, using the Disclosure and Discrimination subscales of the Stigma Scale.ResultsStigma was positively related to help-seeking delay for carers but not patients. Public stigma experienced by carers accounted for 23% of the variance in help-seeking delay.ConclusionReducing stigma may reduce help-seeking delays during the course of treatment.
      PubDate: 2016-08-24T12:40:29.935765-05:
      DOI: 10.1111/appy.12255
       
  • Lost in transition: A review of the unmet need of patients with attention
           deficit/hyperactivity disorder transitioning to adulthood
    • Authors: Tamás Treuer; Kwok Ling Phyllis Chan, Bung Nyun Kim, Ganesh Kunjithapatham, Dora Wynchank, Bengi Semerci, William Montgomery, Diego Novick, Héctor Dueñas
      Abstract: This review discusses the unmet needs of patients with attention deficit/hyperactivity disorder (ADHD) who are transitioning into adulthood. Although awareness and recognition of ADHD in children, adolescents, and adults have improved in recent years, there is often an interruption in management of the disorder when adolescent patients transition to adult health care services. This review has the following objectives: (1) to identify key issues patients with ADHD (with or without an early diagnosis) face during transition into adulthood; (2) to review the current clinical practice and country-specific approaches to the management of the transition into adulthood for patients with ADHD; (3) to discuss challenges facing clinicians and their patients when drug treatment for ADHD is initiated; (4) to review current ADHD guidelines on transition management in Hong Kong, Singapore, South Korea, Turkey, and Africa; and (5) to examine economic consequences associated with ADHD. The review suggests that the transition period to adult ADHD may be an underresearched and underserved area. The transition period plays an important role regarding how ADHD symptoms may be perceived and acted upon by adult psychiatrists. Further studies are needed to explore the characteristics of the transition period. If only a fraction of adolescents go on to have mental disorders during adulthood, especially ADHD, it is crucial to identify their characteristics to target appropriate interventions at the beginning of the course of illness. There continues to be low recognition of adult ADHD and a severe lack of medical services equipped to diagnose and care for patients with ADHD transitioning from child to adult services.
      PubDate: 2016-08-23T13:35:27.140895-05:
      DOI: 10.1111/appy.12254
       
  • Diagnostic accuracy of Japanese posttraumatic stress measures after a
           complex disaster: The Fukushima Health Management Survey
    • Authors: Yuriko Suzuki; Hirooki Yabe, Naoko Horikoshi, Seiji Yasumura, Norito Kawakami, Akira Ohtsuru, Hirobumi Mashiko, Masaharu Maeda,
      Abstract: BackgroundThe Posttraumatic Stress Disorder (PTSD) Checklist (PCL) has been widely used among traumatized populations to screen people with PTSD; however, the Japanese version of the PCL has yet to be validated. We examined the diagnostic accuracy of the Japanese version PCL-Specific (PCL-S) and the abbreviated versions of the PCL-S among the evacuees of the Fukushima Daiichi Nuclear Power Plant accident.MethodsFifty-one participants were recruited from an evacuee and clinical sample. The PCL-S, Impact of Event Scale-Revised (IES-R), and World Health Organization Composite International Diagnostic Interview were administered. Screening properties of the PCL-S, IES-R, and abbreviated PCL-S against PTSD diagnosis, including sensitivity, specificity, and diagnostic efficiency, were calculated. Receiver operating characteristic curves were drawn, and optimal cutoff points were examined.ResultsThe sensitivity, specificity, and diagnostic efficiency of the PCL-S were 66.7%, 84.9%, and 79.2%, respectively (at 52, the area under the curve was 0.83). The cutoff point method for the PCL-S performed better than did the symptom cluster method. The screening properties of the abbreviated versions were comparable with those of the full version.ConclusionsThe Japanese version of the PCL-S showed moderate diagnostic accuracy and improved performance over the IES-R for PTSD diagnosis based on the Diagnostic and Statistical Manual of Mental Disorders, fourth edition. The Japanese version of the PCL-S was a reliable and valid measure, and its diagnostic accuracy was reasonable for both full and abbreviated versions.
      PubDate: 2016-08-09T07:52:20.761365-05:
      DOI: 10.1111/appy.12248
       
  • Neuropsychiatric disorders in patients with neurocysticercosis
    • Authors: Jesus Ramirez-Bermudez; Jesus Higuera-Calleja, Mariana Espinola-Nadurille, Teresa Corona
      Abstract: Introduction:The purpose of this study was to explore the presence of neuropsychiatric disorders in patients with neurocysticercosis (NCC).Method:Patients with untreated NCC (n = 45) and healthy controls (n = 45) underwent psychiatric and neuropsychological assessments.Results:The majority of patients in the NCC group (64.4%) had at least 1 psychiatric diagnosis, compared with a minority in the control group (31.1%). The frequency of neurocognitive disorders, and particularly dementia (major neurocognitive disorder), was significantly higher in the group of patients with NCC.Discussion:This study confirms the relationship between NCC and cognitive disorders.
      PubDate: 2016-08-05T09:48:22.561424-05:
      DOI: 10.1111/appy.12250
       
  • Mental health status following severe sulfur mustard exposure: a long-term
           study of Iranian war survivors
    • Authors: Shahriar Khateri; Mohammadreza Soroush, Naghmeh Mokhber, Mohammadreza Sedighimoghaddam, Ehsan Modirian, Batool Mousavi, Seyed Javad Mousavi, Maryam Hosseini
      Abstract: IntroductionThis study aimed to describe the mental health status of sulfur mustard–exposed survivors suffering from severe respiratory and ophthalmological problems.MethodsOut of 450 invited Iran-Iraq War survivors of sulfur mustard exposure with severe symptoms, 350 participated in this cross-sectional study. Mental health status was assessed using the Diagnostic and Statistical Manual of Mental Disorders, fourth edition, criteria. Fisher exact test, Pearson chi-square test, and chi-square test were used to assess any relationship, and the independent-sample t test was employed to compare differences between the veterans with ocular and pulmonary injuries.ResultsThere were 60.9% (n = 213) survivors who suffered from mental disorders. Among them, 39.7% (n = 139) were previously untreated and required the initiation of psychiatric treatment. The prevalence of anxiety and mood disorders among all survivors was 40.6% (n = 142) and 32.0% (n = 112), respectively. The most common anxiety and mood disorders were posttraumatic stress disorder (32.9%, n = 115) and major depressive disorder (22.3%, n = 78), respectively. Psychiatric disorders were more prevalent in cases with severe pulmonary chemical injury than in subjects with severe ophthalmologic chemical injury. Significant relationships were found between the types of psychiatric disorders and age, education, and occupation (P 
      PubDate: 2016-08-05T08:25:24.044311-05:
      DOI: 10.1111/appy.12252
       
  • Alcohol consumption, smoking, and drug use in pregnancy: Prevalence and
           risk factors in Southern Thailand
    • Authors: Sawitri Assanangkornchai; Darika Saingam, Nualta Apakupakul, J Guy Edwards
      Abstract: IntroductionSubstance use during pregnancy contributes to the risk of adverse health outcomes in mothers and children—in utero and during later development. In this study, we investigated the prevalence of substance use and associated factors in pregnant women receiving antenatal care in public hospitals in Thailand.MethodsWomen (3578) attending 7 antenatal care clinics in Songkhla for the first time during their current pregnancy were interviewed with a structured questionnaire focusing on demographic data, obstetric history, use of alcohol, tobacco, and other substances, and the General Health Questionnaire was administered. The use of substances was confirmed with the ultrarapid version of the Alcohol, Smoking, and Substance Involvement Screening Test and urine tests, which were also administered to 1 in 5 to 10 randomly selected women whose screening results were negative.ResultsBased on self-reports and General Health Questionnaire results, the weighted prevalence of alcohol, tobacco, or illicit substance use and that of “mental health problems” were 5.6% (95% confidence interval [CI], 4.9-6.4) and 29.2% (95% CI, 27.5-30.9), respectively. On the basis of the ultrarapid version of the Alcohol, Smoking, and Substance Involvement Screening Test and urine tests, the prevalence of likely substance use disorder during the 3 months prior to assessment was 1.2% (95% CI, 0.8-1.5) and 7.7% (95% CI, 4.6-10.7), respectively. Factors associated with substance use were religion, unmarried status, unplanned pregnancy, previous abortion, and current mental health problem.DiscussionOur results emphasize the need for identification of substance use and mental health problems, with the help of questionnaires and biological markers, followed by early intervention.
      PubDate: 2016-08-05T06:35:40.437179-05:
      DOI: 10.1111/appy.12247
       
  • The relationships between symptoms and quality of life over the course of
           cognitive-behavioral therapy for panic disorder in Japan
    • Authors: Sei Ogawa; Masaki Kondo, Jynya Okazaki, Risa Imai, Keiko Ino, Toshi A Furukawa, Tatsuo Akechi
      Abstract: IntroductionThis study examined the relationships between changes in symptoms and changes in quality of life (QOL) during cognitive-behavioral therapy (CBT) for panic disorder (PD).MethodsWe treated 198 PD patients with group CBT in Japan. Using multiple regression analysis, we examined the associations between changes in QOL and changes in PD symptoms or comorbid psychological symptoms during CBT.ResultsChanges in anticipatory anxiety, agoraphobic fear/avoidance, and somatization were significant predictors of changes in some aspects of QOL.DiscussionIt might be useful to decrease somatization, anticipatory anxiety, and agoraphobic fear to improve QOL in CBT for PD.
      PubDate: 2016-08-01T22:05:31.972536-05:
      DOI: 10.1111/appy.12249
       
  • Rail-suicide prevention: Systematic literature review of evidence-based
           activities
    • Authors: Emma Barker; Kairi Kolves, Diego De Leo
      Abstract: BackgroundRail-related suicide is a relatively rare but extremely lethal method of suicide that can have far-reaching consequences.ObjectiveThe aim of the systematic literature review was to analyze the existing literature on the effectiveness of rail-suicide prevention activities.Data sourcesDatabases used were Scopus, Medline, and ProQuest.Search termsThe search terms used were “suicid*,” “prevent*,” “rail*,” or “train.”Eligibility criteriaEnglish-language studies published in peer-reviewed journals between 1 January 1990 and 30 April 2015 that presented an overview of rail-related suicide prevention activities and included an analysis of effectiveness were used.ResultsWe retrieved 1,229 results in the original search with nine papers presenting empirical evidence. Three studies in the review analyzed the effectiveness of platform screen doors and another three analyzed the installation of blue lights, two papers analyzed the effectiveness of suicide pits, and one included the influence of media reporting guidelines.ConclusionPlatform screen doors, suicide pits, blue lights, and improved media guidelines all have the potential to reduce rail-related suicide events and deaths.LimitationsThe review was restricted to English-language peer-reviewed papers published within the chosen time period.
      PubDate: 2016-07-14T07:06:01.880788-05:
      DOI: 10.1111/appy.12246
       
  • Assessment of anxiety levels of patients awaiting surgery for suspected
           thyroid cancer: A case-control study in a Chinese-Han population
    • Authors: Yu Yang; Hui Ma, Man Wang, Aiping Wang
      Abstract: IntroductionThe objective of this study was to evaluate levels and prevalence of anxiety in thyroid tumor patients awaiting surgery and diagnosis and to investigate whether significant differences existed in preoperative anxiety levels between patients with postoperative pathological diagnosis of benign thyroid tumors (BTT) or thyroid cancer (TC) in a Chinese-Han population.MethodsFive hundred and twenty-nine patients awaiting surgery and diagnosis were chosen as the patient group, and 419 healthy Chinese were chosen as the control group. Anxiety levels were assessed by the State-Trait Anxiety Inventory.ResultsThe cytological and histopathologic examinations showed BTT in 390 patients and TC in 139 patients. Moderate and high state-anxiety prevalence were 63.3%, 66.9%, and 38.9%, and moderate and high trait-anxiety prevalence were 53.6%, 56.1%, and 20.5% for BTT, TC, and healthy groups, respectively. There were significant differences in sample distributions between low and moderate/high anxiety levels among the three groups (state-anxiety, χ2 = 60.95, P 
      PubDate: 2016-05-26T23:45:26.680132-05:
      DOI: 10.1111/appy.12245
       
  • Methionine synthase 2756AA polymorphism is associated with the risk of
           cognitive impairment in patients with late-life depression
    • Authors: Ya-Hsu Yang; Chih-Chiang Chiu, Hao-Wei Teng, Chih-Pang Chu, Ching-Jui Chang, Wei-Che Chiu, Chin-Hsin Chen, Mong-Liang Lu, Shen-Ing Liu, Shih-Yi Huang, Hsing-Cheng Liu, I-Wen Sun
      Abstract: BackgroundsApolipoprotein E epsilon-4 (APOE ε4) allele, methylenetetrahydrofolate reductase (MTHFR C677T), and methionine synthase (MTR A2756G) were tested their associations with cognitive impairment in people with late-life depression (LLD).MethodsPeople with LLD were assessed by mini-mental state examination and were examined the distribution of APOE ε4 allele, MTHFR, and MTR polymorphisms.ResultsOdds ratio of MTR 2756 AA to MTR 2756 AG and GG genotypes for the risk of cognitive impairment was 5.80 (95% confidence interval = 1.18–28.50; P = 0.03).ConclusionPeople with LLD carrying MTR2756 AA genotype have higher risk of cognitive impairment than those carrying G allele.
      PubDate: 2016-04-25T12:50:37.811293-05:
      DOI: 10.1111/appy.12242
       
  • Interpersonal–psychological theory and parental bonding predict suicidal
           ideation among soldiers in Taiwan
    • Authors: Kai-Cheng Huang; Dong-Sheng Tzeng, Chi-Hung Lin, Wei-Ching Chung
      Abstract: IntroductionSuicide is an important issue among military personnel, who have higher suicide rates compared with the general population. The interpersonal–psychological theory of suicide (IPTS) might provide an empirical explanation of this phenomenon, and parental bonding influences social adjustment and suicide. To investigate the relevance of IPTS and parental bonding for suicide among Taiwanese soldiers, a case–control study was conducted.MethodsUsing a suicide-reporting system in a teaching general hospital in Southern Taiwan, 226 at-risk maladjusted soldiers and 229 well-adjusted controls were enrolled. We collected basic information, and participants answered four IPTS-based questions. Suicide risk was assessed using the Brief Symptom Rating Scale item 6. A four-factor model of the Parental Bonding Instrument assessed parental bonding. All participants were interviewed using the Mini International Neuropsychiatric Interview for primary screening and to recheck the accuracy of the Brief Symptom Rating Scale item 6 score.ResultsA parsimonious model obtained by regression analysis of risk factors indicated that poor academic performance, conduct-related issues in childhood, and exposure to life-threatening situations are risk factors for suicide intention. Maladjusted suicidal soldiers showed a sense of thwarted belongingness (β = 0.145; P 
      PubDate: 2016-03-02T03:38:20.884425-05:
      DOI: 10.1111/appy.12236
       
  • L2–Optimal Fopdt Models of High–Order Transfer Functions
    • Authors: Daniele Casagrande; Wieslaw Krajewski, Umberto Viaro
      Pages: 428 - 437
      Abstract: Necessary conditions for the L2 optimality of a first order plus dead time (FOPDT) model of a high-order plant are derived using classic analytic function theory. They are expressed as a set of three nonlinear equations that partly resemble the interpolation conditions valid for rational approximation. From these conditions a simple procedure to find the optimal FOPDT model is obtained. Examples taken from the relevant literature are worked out to show the performance of the method in comparison with alternative techniques.
      PubDate: 2016-07-20T10:01:07.878017-05:
      DOI: 10.1002/asjc.1354
       
  • Hysteresis-Based Design of Dynamic Reference Trajectories to Avoid
           Saturation in Controlled Wind Turbines
    • Authors: Christian Tutivén; Yolanda Vidal, Leonardo Acho, José Rodellar
      Pages: 438 - 449
      Abstract: The main objective of this paper is to design a dynamic reference trajectory based on hysteresis to avoid saturation in controlled wind turbines. Basically, the torque controller and pitch controller set-points are hysteretically manipulated to avoid saturation and drive the system with smooth dynamic changes. Simulation results obtained from a 5MW wind turbine benchmark model show that our proposed strategy has a clear added value with respect to the baseline controller (a well-known and accepted industrial wind turbine controller). Moreover, the proposed strategy has been tested in healthy conditions but also in the presence of a realistic fault where the baseline controller caused saturation to finally conduct to instability.
      PubDate: 2016-10-04T08:25:36.840321-05:
      DOI: 10.1002/asjc.1383
       
  • Improved control performance of the 3-DoF aeroelastic wing section: a TP
           model based 2D parametric control performance optimization
    • Authors: Alexandra Szollosi; Peter Baranyi
      Pages: 450 - 466
      Abstract: Based on the most recent Tensor Product model transformation solutions, the paper presents an improved control performance for the most recent version of the three Degree of Freedom aeroelastic wing section model including Stribeck friction, according to signals pitch, plunge, trailing edge and control value, based on practical engineering criteria such as overshoot, undershoot, signal end values and settling time. This is achieved through proposing a novel two dimensional parametric convex hull manipulation based method for Tensor Product model transformation based Control Design Frameworks. The approach provides two TP model representations for the different requirements of the controller and observer of a given model, opening the possibility to utilize the TP model transformation's convex hull manipulation potential in control performance optimization for a separate optimization of the two TP model representations. Numerical simulation results are provided to illustrate the control performance improvements of the aeroelastic wing section model through the proposed 2D parametric convex hull manipulation based design method.
      PubDate: 2016-12-07T08:25:56.287852-05:
      DOI: 10.1002/asjc.1418
       
  • More Relaxed Non-Quadratic Stabilization Conditions Using Ts Open Loop
           System and Control Law Properties
    • Authors: Navid Vafamand; Mokhtar Shasadeghi
      Pages: 467 - 481
      Abstract: This paper proposes more relaxed stabilization conditions based on a non-quadratic Lyapunov function (NQLF) and parallel distributed compensator (PDC) controller. The conditions are derived in terms of linear matrix inequalities (LMIs) by introducing three slack matrices based on the properties of TS membership functions, an open loop system and a PDC controller. These slack matrices are utilized to decouple the LMI variables from the TS system and the input matrices. Therefore, the proposed approach greatly reduces the number of LMI conditions and improves feasibility by providing more degrees of freedom compared to recently published studies. Moreover, local stability and stabilization conditions are considered to handle the time derivatives of membership functions appearing in the stabilization synthesis of the TS closed-loop system with PDC controller. Finally, several examples are presented to demonstrate the advantages of the proposed approaches.
      PubDate: 2016-12-21T04:50:48.209711-05:
      DOI: 10.1002/asjc.1429
       
  • Alignment Motion Control for an Automated Human Ear Surgery via
           Vision-Servoing
    • Authors: Wenchao Gao; Wenyu Liang, Kok Kiong Tan
      Pages: 482 - 493
      Abstract: To treat a worldwide common ear disease called Otitis Media with Effusion, a robotic device allowing fast and automatic grommet tube insertion has been designed in our earlier works. However, the previous version has to be manually placed close to the tympanic membrane before the insertion procedures. For the purpose of realizing a fully automated surgical process, locating and realizing a suitable insertion path from outside the ear forms a crucial step. It is then desirable to control the working channel to be aligned to the axial direction of auditory canal from the vision channel. In this paper, a fast and robust vision-based servomechanism is proposed to achieve the planar alignment. To detect and track the region of auditory canal through the image sequences, an image segmentation algorithm based on the phase information and combining with the hough transformation technique is proposed. With the help of Kalman filter, a new look-and-move servomechanism can be achieved by utilizing the visual and motion measurements simultaneously, resulting in an effective and robust servoing performance.
      PubDate: 2016-08-16T03:05:46.244006-05:
      DOI: 10.1002/asjc.1356
       
  • Stability of Local On-Ramp Metering Control Laws
    • Authors: Luis Alvarez-Icaza; Oscar Rosas-Jaimes, María Elena Lárraga
      Pages: 494 - 509
      Abstract: A framework for stability analysis of local on-ramp metering control strategies based on the cell transmission model is presented. Within this framework, it is possible to formulate Lyapunov and input-state stability results for on-ramp metering control strategies in an open section of highway with on-ramps. Using this analysis, recommendations for the design of on-ramp metering control laws set points are derived. Two examples on the use of such analysis are presented. One deals with the stability analysis of a local on-ramp metering control law and the other with the design of a disturbance observer that, used in combination with the local on-ramp metering control law, provides a more robust response to traffic regulation. Simulation results are included that confirm the possibility of using this framework to test the impact of local on-ramp metering control strategies.
      PubDate: 2016-08-11T09:05:30.077594-05:
      DOI: 10.1002/asjc.1360
       
  • Synchronization of General Linear Multi-Agent Systems With Measurement
           Noises
    • Authors: Wenhui Liu; Chunjie Yang, Feiqi Deng, Jiarong Liang
      Pages: 510 - 520
      Abstract: This paper studies the synchronization of general linear multi-agent systems with measurement noises in mean square. It shows that the conventional consensus protocol is efficient and robust to the additive and multiplicative measurement noises in mean square. For the additive measurement noises which are independent of the relative-states, it shows that the multi-agent systems can achieve synchronization in practical mean square. For the multiplicative measurement noises which are dependent of the relative-states, it shows that the multi-agent systems can achieve synchronization in (strict) mean square. Furthermore, the new consensus protocol is better than the conventional one at some specific situations, i.e., the multi-agent systems with additive measurement noises can also achieve synchronization in (strict) mean square. Numerical simulations are also provided and the results show highly consistent with the theoretical results.
      PubDate: 2016-08-03T05:56:45.721463-05:
      DOI: 10.1002/asjc.1357
       
  • Fractional Order Modeling And Nonlinear Fractional Order Pi-Type Control
           For PMLSM System
    • Authors: Bao Song; Shiqi Zheng, Xiaoqi Tang, Wenjun Qiao
      Pages: 521 - 531
      Abstract: In this paper, firstly a fractional order (FO) model is proposed for the speed control of a permanent magnet linear synchronous motor (PMLSM) servo system. To identify the parameters of the FO model, a practical modeling algorithm is presented. The algorithm is based on a pattern search method and its effectiveness is verified by real experimental results. Second, a new fractional order proportional integral type controller, that is, (PIμ)λ or FO[FOPI], is introduced. Then a tuning methodology is presented for the FO[FOPI] controller. In this tuning method, the controller is designed to satisfy four design specifications: stability requirement, specified gain crossover frequency, specified phase margin, flat phase constraint, and minimum integral absolute error. Both set point tracking and load disturbance rejection cases are considered. The advantages of the tuning method are that it fully considers the stability requirement and avoids solving a complex nonlinear optimization problem. Simulations are conducted to verify the effectiveness of the proposed FO[FOPI] controller over classical FOPI and FO[PI] controllers.
      PubDate: 2016-07-22T08:01:22.5966-05:00
      DOI: 10.1002/asjc.1353
       
  • Observability and Controllability Analysis for Micro-Positioning Stage
           Described by Sandwich Model with Hysteresis
    • Authors: Na Luo; Yonghong Tan, Ruili Dong
      Pages: 532 - 542
      Abstract: In this paper, an approach for analyzing the observability and controllability of micro-positioning stage with piezoelectric actuator described by sandwich model with hysteresis is proposed. As hysteresis inherent in piezoelectric actuator is a non-smooth nonlinear function with multi-valued mapping, the positioning system is also a non-smooth dynamic system. The Prandtl-Ishlinksii (PI) submodel is employed to describe the characteristic of hysteresis embedded in the sandwich system. A linearization method based on non-smooth optimization is proposed to derive a generalized linearized state-space function to approximate the non-smooth sandwich systems within a bounded region around the equilibrium points the system works at. Then, both observability and controllability matrices are constructed and the methods to analyze the observability as well as the controllability of sandwich system with hysteresis are derived. Finally, a simulation example and an application of the proposed method to a micro-positioning stage with piezoactuator are presented to validate the proposed method.
      PubDate: 2016-09-23T08:15:35.802514-05:
      DOI: 10.1002/asjc.1367
       
  • A Delay-Dependent Approach to Robust Fast Adaptive Fault Estimation Design
           for Uncertain Neutral Systems with Time-Varying Interval Delay
    • Authors: Fuqiang You; Hui Li, Fuli Wang, Shouping Guan
      Pages: 543 - 553
      Abstract: This paper studies the problem of robust fault estimation for neutral systems, which are subjected to uncertainties, actuator fault, time-varying interval delay, and norm-bounded external disturbance. Based on the fast adaptive fault estimation (FAFE) algorithm, we focus on the design of a fault estimation filter that guarantees stability in the filtering error system with a prescribed H∞ performance. A novel Lyapunov-Krasovskii functional is employed, which includes time delay information. A delay-dependent criterion of robust fault estimation design is obtained by employing the free-weighting matrices technique, and the proposed result has advantages over some existing results, in that it is less conservative and it enlarges the application scope. An improved sufficient condition for the existence of such a filter is proposed in terms of the linear matrix inequality (LMI) by the Schur complements and the cone complementary linearization algorithm. Finally, illustrative examples are provided to show the effectiveness of the proposed method.
      PubDate: 2016-08-19T10:20:29.493596-05:
      DOI: 10.1002/asjc.1363
       
  • An Efficient Finite Difference Method for The Time-Delay Optimal Control
           Problems With Time-Varying Delay
    • Authors: Amin Jajarmi; Mojtaba Hajipour
      Pages: 554 - 563
      Abstract: In this paper, an efficient finite difference method is presented for the solution of time-delay optimal control problems with time-varying delay in the state. By using the Pontryagin's maximum principle, the original time-delay optimal control problem is first transformed into a system of coupled two-point boundary value problems involving both delay and advance terms. Then the derived system is converted into a system of linear algebraic equations by using a second-order finite difference formula and a Hermite interpolation polynomial for the first-order derivatives and delay terms, respectively. The convergence analysis of the proposed approach is provided. The new scheme is also successful for the optimal control of time-delay systems affected by external persistent disturbances. Numerical examples are included to demonstrate the validity and applicability of the new technique. Some comparative results are included to illustrate the effectiveness of the proposed method.
      PubDate: 2016-08-19T10:15:35.501466-05:
      DOI: 10.1002/asjc.1371
       
  • Event-Based Semiglobal Consensus of Homogenous Linear Multi-Agent Systems
           Subject to Input Saturation
    • Authors: Bo Zhou; Xiaofeng Liao, Tingwen Huang, Huaqing Li, Guo Chen
      Pages: 564 - 574
      Abstract: In this paper, we consider the semiglobal leader-following consensus of general linear multi-agent systems subject to input saturation. First, an event-triggered control protocol is provided to ensure semiglobal consensus of the multi-agent systems, in which the agents should continuously monitor the information of their neighbors. Second, a self-triggered control protocol is proposed to guarantee the semiglobal consensus of the multi-agent systems, in which the agents only have access to the information of their neighbors in discrete time instants. Moreover, both event-triggered control protocol and self-triggered control protocol are proved to be Zeno-free, that is, the inter-event times for such two protocols have positive lower bounds. Finally, two numerical examples are provided to illustrate the effectiveness of the proposed event-based semiglobal consensus protocols.
      PubDate: 2016-08-24T02:05:35.144693-05:
      DOI: 10.1002/asjc.1378
       
  • Robust Finite-Time H∞ Control of a Class of Disturbed Systems using
           Lmi-Based Approach
    • Authors: Xiaoyu Zhang; Jihong Zhong, Quan Zhang, Kemao Ma
      Pages: 575 - 586
      Abstract: In this paper, the definition of robust finite-time H∞ control is presented for a class of disturbed systems. Time-varying norm-bounded exogenous disturbance is considered in the system. A state feedback controller is designed, via a Linear Matrix Inequalities (LMIs) approach, which ensures that the closed-loop system is finite-time bounded (FTB) and reduces the effect of the disturbance input on the controlled output to a prescribed level. The main result, derived by Lyapunov functions, is a sufficient condition for FTB of disturbed systems and the sufficient condition can be reduced to a feasibility problem involving LMIs. Then a DC motor position control problem is simulated as a demonstration for this study. Simulation results are presented to show the effectiveness of the proposed method as a promising approach for controlling similar disturbed systems.
      PubDate: 2016-09-15T07:56:10.959639-05:
      DOI: 10.1002/asjc.1381
       
  • Smith Predictor Based Fractional-Order-Filter PID Controllers Design for
           Long Time Delay Systems
    • Authors: Maamar Bettayeb; Rachid Mansouri, Ubaid Al-Saggaf, Ibrahim Mustafa Mehedi
      Pages: 587 - 598
      Abstract: In this paper, an original model-based analytical method is developed to design a fractional order controller combined with a Smith predictor and a modified Smith predictor that yield control systems which are robust to changes in the process parameters. This method can be applied for integer order systems and for fractional order ones. Based on the Bode's ideal transfer function, the fractional order controllers are designed via the internal model control principle. The simulation results demonstrate the successful performance of the proposed method for controlling integer as well as fractional order linear stable systems with long time delay.
      PubDate: 2016-09-13T04:21:26.321926-05:
      DOI: 10.1002/asjc.1385
       
  • Output Feedback Control of Surge and Rotating Stall in Axial Compressors
    • Authors: Hanlin Sheng; Wei Huang, Tianhong Zhang
      Pages: 599 - 605
      Abstract: Active control has been widely studied to expand the stable operating range of axial flow compressors in aero-engines.In this paper, a nonlinear active state feedback controller is proposed first based on bifurcation analysis results of MG model.Then by taking pressure ratio as output parameter, a state observer is designed to estimate the compressor's flow coefficient. An output feedback controller is thus established by combining the observer with the state feedback controller.Finally, digital simulation shows that the proposed output feedback controller not only eliminates the hysteresis loop associated with rotating stall and emergence of surge, but also extends the stable operating range of axial flow compressors effectively.Furthermore, being flexible in using pressure transducer and throttle valve as sensor and actuator respectively, which have been equipped in common engines, the proposed controller has good applicability.
      PubDate: 2016-09-21T04:56:01.165003-05:
      DOI: 10.1002/asjc.1384
       
  • Distributed Consensus of Multi-Agent Networks Via Event-Triggered Pinning
           Control
    • Authors: Dan Liu; Aihua Hu, Dan Zhao
      Pages: 614 - 624
      Abstract: This paper is concerned with distributed consensus between two multi-agent networks with the same topology structure. Considering one network as the leaders' network and the other one as the followers' network, a new event-triggered pinning control scheme is proposed to realize distributed consensus between these two networks. By utilizing the graph theory and Lyapunov functional method, consensus criteria are derived in the form of linear matrix inequalities. Moreover, distributed consensus of multi-agent networks with Lipschitz nonlinear dynamics is also discussed. Numerical simulations are provided to demonstrate the effectiveness of the theoretical analysis.
      PubDate: 2016-09-15T08:10:43.453648-05:
      DOI: 10.1002/asjc.1389
       
  • Robust Output Feedback Controller Design for Time-Delayed Teleoperation:
           Experimental Results
    • Authors: I. Sharifi; H. A. Talebi, M. Motaharifar
      Pages: 625 - 635
      Abstract: In this paper, a robust output feedback control strategy is proposed for a nonlinear teleoperation system which can deal with stability as well as transparency despite the variable time-delay and uncertain dynamics. The proposed approach is composed of two steps. First, local Lyapunov based adaptive controllers are applied to both master and slave sides in order to suppress the nonlinearities in the system dynamics. Afterwards, a new observer-based controller scheme is proposed to achieve stability and performance (transparency) of the teleoperation system. Using the Lyapunov techniques, stability and performance objectives are cast as some linear matrix inequality (LMI) feasibility conditions. To evaluate the performance of the proposed controller, a set of simulations and experiments are performed. Through simulation results, it is demonstrated that the proposed approach significantly outperforms the existing methodologies reported in the literature.
      PubDate: 2016-09-09T09:53:02.681743-05:
      DOI: 10.1002/asjc.1387
       
  • Fault Diagnosis and Sliding Mode Fault Tolerant Control for Non-Gaussian
           Stochastic Distribution Control Systems Using T-s Fuzzy Model
    • Authors: Yao Lina; Lei Chunhui
      Pages: 636 - 646
      Abstract: For the non-Gaussian stochastic distribution control system using Takagi-Sugeno fuzzy model, a new fault diagnosis and sliding mode fault tolerant control algorithm is presented. First, a new adaptive fault diagnosis algorithm is adopted to diagnose the fault that occurred in the system, and the observation error system is proven to be uniformly bounded. Second, the sliding mode control algorithm is used to reconfigure the controller, based on the fault estimation information. The post-fault probability density function can still track the given distribution, leading to fault tolerant control of non-Gaussian stochastic distribution control systems using Takagi-Sugeno fuzzy model. Finally, simulation results show the effectiveness of the proposed method.
      PubDate: 2016-10-04T08:10:59.151597-05:
      DOI: 10.1002/asjc.1390
       
  • Performance Analysis of The Auxiliary-Model-Based Multi-Innovation
           Stochastic Newton Recursive Algorithm for Dual-Rate Systems
    • Authors: Pengfei Cao; Xionglin Luo
      Pages: 647 - 658
      Abstract: The stochastic Newton recursive algorithm is studied for dual-rate system identification. Owing to a lack of intersample measurements, the single-rate model cannot be identified directly. The auxiliary model technique is adopted to provide the intersample estimations to guarantee the recursion process continues. Intersample estimations have a great influence on the convergence of parameter estimations, and one-step innovation may lead to a large fluctuation or even divergence during the recursion. In the meantime, the sample covariance matrix may appear singular. The recursive process would cease for these reasons. In order to guarantee the recursion process and to also improve estimation accuracy, multi-innovation is utilized for correcting the parameter estimations. Combining the auxiliary model and multi-innovation theory, the auxiliary-model-based multi-innovation stochastic Newton recursive algorithm is proposed for time-invariant dual-rate systems. The consistency of this algorithm is analyzed in detail. The final simulations confirm the effectiveness of the proposed algorithm.
      PubDate: 2016-10-18T02:11:10.325902-05:
      DOI: 10.1002/asjc.1395
       
  • Non-Fragile Observer-Based ℋ∞ Control for Uncertain Neutral-Type
           Systems via Sliding Mode Technique
    • Authors: Zhen Liu; Cunchen Gao, Huimin Xiao, Yonggui Kao
      Pages: 659 - 671
      Abstract: This paper is concerned with the problem of observer-based ℋ∞ control for a class of uncertain neutral-type systems subjected to external disturbance by utilizing sliding mode technique. A novel sliding mode control (SMC) strategy is proposed based on the state estimate and the output. A new sufficient condition of robust asymptotic stability with ℋ∞ disturbance attenuation level for the overall systems composed of the original system and error system in the sliding mode is derived in terms of a linear matrix inequality (LMI). Then, a new adaptive controller is designed to guarantee the reachability of the predefined sliding surface in finite-time. Finally, numerical examples are provided to verify the effectiveness of the proposed method.
      PubDate: 2016-10-11T02:00:41.114645-05:
      DOI: 10.1002/asjc.1391
       
  • L2-gain analysis and anti-windup design of switched linear systems subject
           to input saturation
    • Authors: Xinquan Zhang
      Pages: 672 - 680
      Abstract: The problem of L2-gain analysis and anti-windup compensation gains design is studied for a class of switched linear systems with actuator saturation via the multiple Lyapunov functions approach. When a set of anti-windup compensation gains are given, a sufficient condition on tolerable disturbances is obtained, under which the state trajectory starting from the origin will remain inside a bounded set. Then over this set of tolerable disturbances, we obtain the upper bound of the restricted L2-gain. Furthermore, the anti-windup compensation gains and the switched law, which aim to determine the maximum disturbance tolerance capability and the minimum upper bound of the restricted L2-gain, are presented by solving a convex optimization problem with linear matrix inequality (LMI) constraints. Finally we give a numerical example to demonstrate the effectiveness of the proposed method.
      PubDate: 2016-10-03T02:11:09.118162-05:
      DOI: 10.1002/asjc.1398
       
  • Event-Triggered Control for Couple-Group Multi-Agent Systems with
           Logarithmic Quantizers and Communication Delays
    • Authors: Mei Yu; Chuan Yan, Dongmei Xie
      Pages: 681 - 691
      Abstract: This paper mainly investigates the event-triggered control for couple-group multi-agent systems with communication delay. Logarithmic quantization is considered in the communication channels. Event-triggered control laws are adopted to reduce the frequency of individual actuation updating for discrete-time agent dynamics. The proposed protocol is efficient as long as the quantization levels are dense enough, i.e. the density of quantization levels goes to infinity is a sufficient condition for the asymptotic consensus of the multi-agent systems. It turns out that the bounded consensus depends on not only the density of quantization levels, but also the updating strategy of events. Finally, a simulation example is given to demonstrate the effectiveness of the proposed methods.
      PubDate: 2016-12-26T23:35:33.316733-05:
      DOI: 10.1002/asjc.1397
       
  • Modeling and Control Approach to Coupled Tanks Liquid Level System Based
           on Function-Type Weight RBF-ARX Model
    • Authors: Feng Zhou; Hui Peng, Xiaoyong Zeng, Xiaoying Tian, Jun Wu
      Pages: 692 - 707
      Abstract: A multi-input multi-output (MIMO) FWRBF-ARX model, which adopts radial basis function (RBF) neural networks with function-type weights (FWRBF) to approximate the coefficients of the state-dependent AutoRegressive model with eXogenous input variables (SD-ARX), is utilized for describing the dynamics of a coupled tanks liquid system. Based on local linearization information of the MIMO FWRBF-ARX model, a predictive control strategy is proposed. In the algorithm, the control actions of the model predictive control (MPC) are calculated based on the local linearization of the MIMO FWRBF-ARX model at current working point. Real-time control experiments are carried out on the coupled tanks liquid system. The detailed comparative experiments demonstrate the feasibility and effectiveness of the proposed modeling and model-based control strategy for the coupled tanks plant.
      PubDate: 2016-10-18T03:31:00.108125-05:
      DOI: 10.1002/asjc.1393
       
  • Delay-Dependent Stability Criterion for Discrete-Time Systems with
           Time-Varying Delays
    • Authors: Changchun Hua; Shuangshuang Wu, Zhenhua Bai, Xinping Guan
      Pages: 708 - 716
      Abstract: The stability analysis problem is considered for linear discrete-time systems with time-varying delays. A novel summation inequality is proposed, which takes the double summation information of the system state into consideration. The inequality relaxes the recently proposed discrete Wirtinger inequality and its improved version. Based on construction of a suitable Lyapunov-Krasovskii functional and the novel summation inequality, an improved delay-dependent stability criterion for asymptotic stability of the systems is derived in terms of linear matrix inequalities. Numerical examples are given to demonstrate the advantages of the proposed method.
      PubDate: 2016-11-11T08:45:29.426015-05:
      DOI: 10.1002/asjc.1409
       
  • A Matrix Approach to the Analysis and Control of Networked Evolutionary
           Games with Bankruptcy Mechanism
    • Authors: Shihua Fu; Yuzhen Wang, Guodong Zhao
      Pages: 717 - 727
      Abstract: This paper investigates the evolutionary dynamic and control problem for a kind of networked evolutionary games with bankruptcy mechanism by using semi-tensor product of matrices, and presents a number of new results. First, this kind of games are expressed as logical dynamic networks and converted into their algebraic forms, based on which, the evolutionary dynamics of the given games can be discussed. Second, the control problem is considered, and a control sequence is designed to guarantee that none of players goes bankrupt as the control target requires. Finally, an illustrative example is given to show the effectiveness of our main results.
      PubDate: 2016-11-04T10:36:03.395596-05:
      DOI: 10.1002/asjc.1412
       
  • Modal Kalman Filter
    • Authors: Gh. Mohammaddadi; N. Pariz, A. Karimpour
      Pages: 728 - 738
      Abstract: In the Extended Kalman Filter (EKF), only the first-order term of the Taylor series is employed. Hence, the nonlinearities in the system dynamics are not fully considered. In the proposed method, to overcome this drawback, the higher-order terms of the Taylor series are considered and a new filter, based on the Modal series, is designed. In this paper, based on the Modal series and careful approximations, a nonlinear filter is converted to a series of linear filters, and the extracted filter is named the Modal Kalman Filter (MKF). The efficiency and advantage of MKF are analytically proven and its applicability examined with some simulations.
      PubDate: 2016-12-28T21:10:31.601731-05:
      DOI: 10.1002/asjc.1425
       
  • New Upper Matrix Bounds with Power Form for the Solution of the Continuous
           Coupled Algebraic Riccati Matrix Equation
    • Authors: Jianzhou Liu; Yanpei Wang, Juan Zhang
      Pages: 739 - 747
      Abstract: In this paper, using the structure and coefficient matrix of the continuous coupled algebraic Riccati matrix equation (CCARE), we firstly construct positive definite matrices with power form. Then, applying the variant of the CCARE and inequalities of positive definite matrices, utilizing the characteristics of special matrices and eigenvalue inequalities, we propose new upper matrix bounds with power form for the solution of the CCARE, which improve and extend some of the recent results. Finally, we give corresponding numerical examples to illustrate the effectiveness of the derived results.
      PubDate: 2016-10-18T02:15:31.105688-05:
      DOI: 10.1002/asjc.1400
       
  • Vector-Based Adaptive Attitude Observer and Controller on Special
           Orthogonal Group
    • Authors: Xuhui Lu; Yingmin Jia, Fumitoshi Matsuno
      Pages: 748 - 764
      Abstract: An adaptive attitude observer-controller scheme is proposed for attitude tracking of a rigid body. In the derived observer, the vector measurements are directly utilized to estimate gyro bias, and thus estimates of gyro bias are obtained independent to attitude estimates. The proposed observer is even robust towards fluctuation of gyro bias. Then an adaptive controller is proposed on the Special Orthogonal Group to track the reference trajectory subject to uncertain inertia parameters. This controller belongs to the non-certainty-equivalent framework, and the vector signals are also utilized into estimation of inertia parameters. It is ensured that the estimates of inertia parameters can converge towards real values to some degrees. Simulation results compared with previous observer and controller schemes verify the effectiveness of the proposed scheme.
      PubDate: 2016-10-24T02:10:38.225296-05:
      DOI: 10.1002/asjc.1401
       
  • Fault-Tolerant Finite Frequency H∞ Control for Uncertain Mechanical
           System with Input Delay and Constraint
    • Authors: Shidong Xu; Guanghui Sun, Weichao Sun
      Pages: 765 - 780
      Abstract: In this paper, a novel fault-tolerant finite frequency H∞ controller (FFHC) is developed for uncertain mechanical system with input delay and constraint. First, the mathematical model of uncertain mechanical system is derived, where the uncertainties occur in mass, damping and stiffness matrices, respectively. Then, in view of the fact that the dominant resonance energies are caused by low-order vibration modes of mechanical system, the finite frequency control algorithm is investigated to suppress these low-order resonances peaks. By virtue of Lyapunov-Krasovskii functional (LKF) and generalized Kalman-Yakubovich-Popov (GKYP) lemma, the desirable fault-tolerant controller can be obtained by convex optimization. Numerical simulations verify the improvements and advantages of proposed cotroller in disturbance rejection when compared with the classic entire frequency H∞ controller (EFHC).
      PubDate: 2016-10-10T08:16:56.385324-05:
      DOI: 10.1002/asjc.1399
       
  • Iterative Path Integral Approach to Nonlinear Stochastic Optimal Control
           Under Compound Poisson Noise
    • Authors: Okumura Yuta; Kenji Kashima, Yoshito Ohta
      Pages: 781 - 786
      Abstract: Nonlinear stochastic optimal control theory has played an important role in many fields. In this theory, uncertainties of dynamics have usually been represented by Brownian motion, which is Gaussian white noise. However, there are many stochastic phenomena whose probability density has a long tail, which suggests the necessity to study the effect of non-Gaussianity. This paper employs Lévy processes, which cause outliers with a significantly higher probability than Brownian motion, to describe such uncertainties. In general, the optimal control law is obtained by solving the Hamilton–Jacobi–Bellman equation. This paper shows that the path-integral approach combined with the policy iteration method is efficiently applicable to solve the Hamilton–Jacobi–Bellman equation in the Lévy problem setting. Finally, numerical simulations illustrate the usefulness of this method.
      PubDate: 2016-10-18T02:35:26.5417-05:00
      DOI: 10.1002/asjc.1402
       
  • What is Early View'
    • PubDate: 2010-08-30T20:14:20.724514-05:
      DOI: 10.1111/j.1758-5872.2010.00082.x
       
  • Exponential Stability for Multi-Area Power Systems with Time Delays Under
           Load Frequency Controller Failures
    •  
 
 
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