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COMPUTER SCIENCE (1124 journals)                  1 2 3 4 5 6 7 8 | Last

3D Printing and Additive Manufacturing     Full-text available via subscription  
Abakós     Full-text available via subscription  
Academy of Information and Management Sciences Journal     Full-text available via subscription   (Followers: 34)
ACM Computing Surveys     Full-text available via subscription   (Followers: 16)
ACM Journal on Computing and Cultural Heritage     Full-text available via subscription   (Followers: 3)
ACM Journal on Emerging Technologies in Computing Systems     Full-text available via subscription   (Followers: 9)
ACM Transactions on Accessible Computing (TACCESS)     Full-text available via subscription   (Followers: 4)
ACM Transactions on Algorithms (TALG)     Full-text available via subscription   (Followers: 12)
ACM Transactions on Applied Perception (TAP)     Full-text available via subscription   (Followers: 5)
ACM Transactions on Architecture and Code Optimization (TACO)     Full-text available via subscription   (Followers: 5)
ACM Transactions on Autonomous and Adaptive Systems (TAAS)     Full-text available via subscription   (Followers: 6)
ACM Transactions on Computation Theory (TOCT)     Full-text available via subscription   (Followers: 10)
ACM Transactions on Computational Logic (TOCL)     Full-text available via subscription   (Followers: 3)
ACM Transactions on Computer Systems (TOCS)     Full-text available via subscription   (Followers: 9)
ACM Transactions on Computer-Human Interaction     Full-text available via subscription   (Followers: 6)
ACM Transactions on Computing Education (TOCE)     Full-text available via subscription   (Followers: 2)
ACM Transactions on Design Automation of Electronic Systems (TODAES)     Full-text available via subscription   (Followers: 2)
ACM Transactions on Economics and Computation     Full-text available via subscription  
ACM Transactions on Embedded Computing Systems (TECS)     Full-text available via subscription   (Followers: 2)
ACM Transactions on Information Systems (TOIS)     Full-text available via subscription   (Followers: 10)
ACM Transactions on Intelligent Systems and Technology (TIST)     Full-text available via subscription   (Followers: 6)
ACM Transactions on Interactive Intelligent Systems (TiiS)     Full-text available via subscription   (Followers: 3)
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)     Full-text available via subscription   (Followers: 7)
ACM Transactions on Reconfigurable Technology and Systems (TRETS)     Full-text available via subscription   (Followers: 4)
ACM Transactions on Sensor Networks (TOSN)     Full-text available via subscription   (Followers: 7)
ACM Transactions on Speech and Language Processing (TSLP)     Full-text available via subscription   (Followers: 4)
ACM Transactions on Storage     Full-text available via subscription  
ACS Applied Materials & Interfaces     Full-text available via subscription   (Followers: 13)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 2)
Acta Electrotechnica et Informatica     Open Access  
Acta Informatica     Hybrid Journal   (Followers: 3)
Ad Hoc Networks     Hybrid Journal   (Followers: 11)
Adaptive Behavior     Hybrid Journal   (Followers: 8)
Advanced Engineering Materials     Hybrid Journal   (Followers: 17)
Advanced Science Letters     Full-text available via subscription   (Followers: 6)
Advanced Technology for Learning     Full-text available via subscription   (Followers: 242)
Advances in Adaptive Data Analysis     Hybrid Journal   (Followers: 5)
Advances in Artificial Intelligence     Open Access   (Followers: 10)
Advances in Artificial Neural Systems     Open Access   (Followers: 4)
Advances in Calculus of Variations     Full-text available via subscription   (Followers: 4)
Advances in Catalysis     Full-text available via subscription   (Followers: 4)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 13)
Advances in Computing     Open Access   (Followers: 3)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 133)
Advances in Engineering Software     Hybrid Journal   (Followers: 19)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 12)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 10)
Advances in Human-Computer Interaction     Open Access   (Followers: 14)
Advances in Materials Sciences     Open Access   (Followers: 9)
Advances in Operations Research     Open Access   (Followers: 9)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 7)
Advances in Porous Media     Full-text available via subscription   (Followers: 3)
Advances in Remote Sensing     Open Access   (Followers: 7)
Advances in Science and Research (ASR)     Open Access   (Followers: 7)
AEU - International Journal of Electronics and Communications     Hybrid Journal   (Followers: 5)
African Journal of Mathematics and Computer Science Research     Open Access   (Followers: 1)
AGE     Hybrid Journal   (Followers: 4)
Age and Ageing     Hybrid Journal   (Followers: 23)
AI EDAM     Hybrid Journal   (Followers: 1)
Air, Soil & Water Research     Open Access   (Followers: 6)
AIS Transactions on Human-Computer Interaction     Open Access   (Followers: 4)
Algebras and Representation Theory     Hybrid Journal  
Algorithmica     Hybrid Journal   (Followers: 4)
Algorithms     Open Access   (Followers: 9)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 2)
American Journal of Computational Mathematics     Open Access   (Followers: 1)
Anais da Academia Brasileira de Ciências     Open Access   (Followers: 2)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 4)
Analysis in Theory and Applications     Hybrid Journal  
Animation Practice, Process & Production     Hybrid Journal   (Followers: 6)
Annals of Combinatorics     Hybrid Journal   (Followers: 5)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 6)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Software Engineering     Hybrid Journal   (Followers: 7)
Annual Reviews in Control     Hybrid Journal   (Followers: 4)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applied and Computational Harmonic Analysis     Full-text available via subscription  
Applied Artificial Intelligence: An International Journal     Hybrid Journal   (Followers: 5)
Applied Categorical Structures     Hybrid Journal   (Followers: 1)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 9)
Applied Computer Systems     Open Access   (Followers: 1)
Applied Environmental Education & Communication     Hybrid Journal   (Followers: 11)
Applied Intelligence     Hybrid Journal   (Followers: 6)
Applied Mathematics and Computation     Hybrid Journal   (Followers: 117)
Applied Medical Informatics     Open Access   (Followers: 6)
Applied Numerical Analysis & Computational Mathematics     Hybrid Journal   (Followers: 5)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 7)
Applied Soft Computing     Hybrid Journal   (Followers: 8)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 2)
Architectural Theory Review     Hybrid Journal   (Followers: 1)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 3)
Archives and Museum Informatics     Hybrid Journal   (Followers: 153)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
arq: Architectural Research Quarterly     Hybrid Journal   (Followers: 9)
Artifact     Hybrid Journal   (Followers: 2)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 4)
Artificial Intelligence in Medicine     Hybrid Journal   (Followers: 8)
Artificial Intelligence Review     Hybrid Journal   (Followers: 8)
Artificial Life     Hybrid Journal   (Followers: 4)

        1 2 3 4 5 6 7 8 | Last

Journal Cover Assembly Automation
   [3 followers]  Follow    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
     ISSN (Print) 0144-5154
     Published by Emerald Homepage  [308 journals]   [SJR: 0.301]   [H-I: 18]
  • A new assembly variation analysis model based on the method of power
           balance for auto-body parts
    • Authors: (Yanfeng Xing; Wang Yansong
      Abstract: Abstract

      Purpose - The purpose of this paper is to propose a new assembly variation analysis model to analyze assembly variation for sheet metal parts. The main focus is to analyze assembly processes based on the method of power balance. Design/methodology/approach - Starting with issues in assembly variation analysis, the review shows the critical aspects of tolerance analysis. The method of influence coefficient cannot accurately analyze the relationship between part variations and assembly variations as the welding point is not a point but a small area. Therefore new sensitivity matrices are generated based on the method of power balance. Findings - Two cases illustrate the processes of assembly variation analysis and the results indicate that new method has higher accuracy than the method of influence coefficient.Research limitations/implications - This study is limited to assembly variation analysis for sheet metal parts, which can be used in auto-body and airplane body.Originality/value - This paper provides a new assembly variation analysis based on the method of power balance.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • A posture evaluation method for a large component with thermal deformation
           and its application in aircraft assembly
    • Authors: (Liang Cheng; Qing Wang, Jiangxiong Li, Yinglin Ke
      Abstract: Abstract

      Purpose - The purpose of this paper is to propose a posture evaluation approach based on temperature compensation and 3-D tolerance for the key points.Design/methodology/approach - A large component 3-D compensation model of thermal deformation considering characteristics of the assembly object is developed. Then, the thermal deformation compensation model is used to modify the nominal coordinates for the key points. By using a combination of relative deviations of key points as the objective and 3-D tolerance as the constraints, an optimization model for posture evaluation is established. Findings - Deviations of posture and key points' coordinates are obtained by solving the non-linear constrained optimization problem. The posture evaluation method is demonstrated in both a simulation case and practical implication of the aircraft components assembly system with the result that a good performance is obtained.Practical implications - The proposed method has been used in several aircraft assembly projects in China, and gained a good effect. Originality/value - This paper proposes a method for eliminating the affection of thermal deformation during posture evaluation process and improving the consistency and stability of posture evaluation results. And the results of this research will help to systematically improve the manufacturing process and tolerance allocation efficiency in large aircraft assembly.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • Non-destructive evaluation of stacking sequence in textile composite:
           different techniques and experimental verification
    • Authors: (Abbas Saboktakin; Toan Vu-khanh, Yoann Bonnefon
      Abstract: Abstract

      Purpose - The aerospace industry has been the primary driving force in the use of textile composites. The goal of this paper is to experimentally investigate the capability of four non-destructive testing techniques to detect the layer orientation in textile composite laminates. Design/methodology/approach - Woven Glass fiber composite samples were inspected using C-scan ultrasonic, vibration analyzer, X-ray micro-tomography and ultraviolet technique. In a complementary study, mechanical testing was carried out to investigate the effect of mid layer orientation on in-plane tensile strength and their failure modes using microscopic imagining.Findings - During C-scan ultrasonic, the high attenuation and scattering of ultrasonic waves caused by the textile fabric layers limited its application to only detect the first layer of samples. Frequency response tests of composite samples were also conducted to investigate the effect of mid layer orientation on dynamic responses. The same trend was observed in the finite element modeling results with a clear effect of the fiber orientation defect seen in FRF response and higher mode shapes. Moreover, the results of micro computed tomography demonstrates that this technique could definitely detect the orientation of each layer, however, X-ray imaging at small scales introduced some challenges. Images obtained from ultraviolet technique did not reveal mid layer orientation. Originality/value - In this paper, the application of different NDT techniques along with finite element modeling to inspect 2D textile composite were presented. Hopefully, the research results presented here will lead to much published papers in inspection of textile composites.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • Fitting optimization based on weighted Gaussian imaging method for auto
           body taillight assembly
    • Authors: (Xiang Gao; Hua Wang, Chen guanlong
      Abstract: Abstract

      Purpose - Fitting evenness is one key characteristic for three dimensional objects optimal fit. The weighted Gaussian Imaging method is developed for fitting evenness of auto body taillight fitting optimization. Design/methodology/approach - Fitting boundary contours are extracted from scanning data points. Optimal fitting target is represented with Gap and Flushness between taillight and auto body. By optimizing the fitting position of the projected boundary contours on the Gaussian sphere, the weighted Gaussian imaging method accomplishes optimal requirements of Gap and Flushness. A scanning system is established and the fitting contour of taillight assembly model is extracted to analyse the quality of the fitting process.Findings - The proposed method accomplishes the fitting optimization for taillight fitting with higher efficiency.Originality/value - Weighted Gaussian Imaging method is employed to optimize the taillight fitting. The proposed method optimized the fitting objects 3-D space while the traditional fitting methods are based on 2-D algorithm. Its time complexity is O(n3) while those of the traditional methods are O(n5). The results of this research will enhance the understanding of the three dimensional optimal fitting, and help systematically improving the productivity and the fitting quality in automotive industry.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • Automatic disassembly navigation for accurate virtual assembly path
    • Authors: (Wanbin Pan; Yigang Wang, Peng Du
      Abstract: Abstract

      Purpose - The purpose of this work is to develop an automatic disassembly navigation approach for human interactions in the virtual environment to achieve accurate and effective virtual assembly path planning.Design/methodology/approach - First, to avoid the error-prone human interactions, a constraint-based disassembly method is presented. Second, to automatically provide the next operable part(s), a disassembly navigation mechanism is adopted. Finally, the accurate assembly path planning can be obtained effectively and automatically by inversing the ordered accurate disassembly paths, which are obtained interactively in the virtual environment aided with the disassembly navigation matrix.Findings - The applications present that our approach can effectively avoid the error-prone interactive results and generate accurate and effective virtual assembly path planning.Research limitations/implications - There are several works could be conducted to make our approach more general in the future: (1) to further study the basic disassembly direction deducing rules to make the process of determining disassembly direction totally automatic, (2) to consider the hierarchy of the parts in VR system, and (3) to consider the space for assembly/disassembly tools or operators.Originality/value - The approach has the following characteristics: (1) a new approach to avoid the error-prone human interactions for accurate assembly path planning obtaining, (2) a new constraint deducing method for determining the disassembly semantics automatically or semi-automatically is put forward, and (3) a new method for automatically identifying operable parts in virtual assembly path planning is set forward.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • An improved vision calibration method for coaxial alignment microassembly
    • Authors: (Xin Ye; Jun Gao, Zhijing Zhang, Chao Shao, Guangyuan Shao
      Abstract: Abstract

      Purpose - The purpose of this paper is to propose a sub-pixel calibration method for a microassembly system with coaxial alignment function (MSCA)because traditional sub-pixel calibration approaches cannot be used in this system.Design/methodology/approach - The in-house microassembly system is comprised of a 6-DOF large motion serial robot with microgrippers, a hexapod 6-DOF precision alignment worktable and a vision system whose optical axis of the microscope is parallel with the horizontal plane. A prism with special coating is fixed in front of the objective lens, thus, two parts’ figures can be acquired simultaneously. The relative discrepancy between the two parts can be calculated from image plane coordinate instead of calculating space transformation matrix. Therefore, the traditional calibration method cannot be applied in this microassembly system. An improved calibration method including the check corner detection solves the distortion coefficient conversely. This new way can detect the corner at sub-pixel accuracy. The experiment proves that the assembly accuracy of the coaxial micro assembly system which has been calibrated by the new method can reach micro meter level. Findings - The calibration results indicate that solving the distortion conversely could improve the assembly accuracy of MSCA.Originality/value - The paper provides certain calibration methodological guidelines for devices with 2 dimensions or 2.5 dimensions, such as MEMS devices, using MSCA.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • Development of an adaptive part feeder for handling sector shaped parts
    • Authors: (UDHAYAKUMAR SADASIVAM; MOHANRAM P V, Yeshwanth S, Biswal Manas Ranjan, Sabareeswaran A
      Abstract: Abstract

      Purpose - Part feeders have been used in the industries for a long time to present the parts in a desired orientation. Robert Paul Berretty et al (1999) discussed a class of mechanical filters that are capable of removing polygonal sections from the track of the feeder which are referred to as traps. The traps eliminate or reorient the parts until they reach the final desired orientation. In this paper, a linear vibratory part feeder for handling brakeliners, typical sector shaped components, is discussed. A part feeder was developed using traps, to reorient the sector shaped part to desired orientation. The desired orientation was the most probable natural resting orientation. The trap was mounted on a linear vibratory feeder. The adaptive part feeder developed was capable of identifying the size of the incoming part and adjust the trap to accommodate that. This set-up eliminates the use of different traps for different sized sector shaped parts and wastage of productive time in changing the traps for different sizes. A regression model was developed to predict the conveying velocity of part on the feeder.Design/methodology/approach - A part feeder was developed using traps, to reorient the sector shaped part to desired orientation. Acrylic material was found to be suitable for trap compared to aluminium. The adaptive part feeder developed was capable of identifying the size of the incoming part using proximity sensors. Depending on the size of the incoming part, the track width was adjusted dynamically with the help of a stepper motor, rack & pinion arrangement. A regression model was developed to predict the conveying velocity.Findings - Typical brake liners in the size range of 40mm to 60mm (radius) were considered for developing the adaptive part feeder. Based on performance studies, the acrylic trap was found better than aluminium traps. The appropriate frequency and amplitude of vibration for maximum conveying velocity of the adaptive part feeder was found experimentally. Regression equation was developed to determine the conveying velocity based on input frequency and amplitude. The regression results were found to be in close agreement with the experimental results. Research limitations/implications - The developed part feeder is suitable for handling sector shaped parts only. Originality/value - This paper demonstrates an inexpensive adaptive part feeding device for handling sector shaped parts which can be extended for handling other asymmetric parts also
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • Random bin picking: has its time finally come'
    • Authors: (Robert Bogue
      Abstract: Abstract

      Purpose - This paper aims to provide details of recent developments in random bin picking (RBP) technologies and products, together with an insight into its commercial status and prospects. Design/methodology/approach - Following an introduction to RBP, this article discusses the technology, benefits and limitations of RBP. It then considers a number of products and applications and concludes with a brief discussion. Findings - This article shows that RBP offers significant economic and operational benefits but it is a complex technology and applications remain limited. It is underpinned by advanced machine vision and sophisticated image processing algorithms and continues to be the topic of academic research. Many RBP products have been launched in the past but the latest generation of dedicated vision systems, software packages and fully integrated robotic systems suggest that more widespread applications are imminent. Originality/value - This paper provides a timely introduction to the rapidly developing field of RBP by discussing the technologies and a range of products and applications.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • HARM type MEMS based reed switch innovations address medical, automotive
           and other micro switching applications not previously possible
    • Authors: (Richard Bloss
      Abstract: Abstract

      Purpose - Review of the advancements in development of High Aspect Ratio Microfabrication (HARM) type of MEMS reed switch sensors for much improved performance in a much more compact package.Design/methodology/approach - In-depth review of a number of applications of HARM built MEMS reed switches and consultation with a manufacturer.Findings - One manufacturer has introduced a totally new way to fabricate reed switches which brings numerous benefits such as reliability, higher voltage capability, lower contact resistance and other features in a new tiny package.Practical implications - Manufacturers of devices needing the benefits of the reed switch concept but who need a much smaller and compact switch now have a new option to exploreOriginality/value - An expert insight into how to solve reed switching problems where space is at a premium.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
  • The repeatability positioning analysis of the industrial robot arm
    • Authors: (Rafal Kluz; Tomasz Trzepiecinski
      Abstract: Abstract

      Purpose - The goal of the following work was to work out the dependency to allow for the determination of the repeatability positioning error value of the robot at any given point in its workspace, without the necessity of conducting time consuming measurements while routing a precise surface of repeatability positioning.Design/methodology/approach - The presented dependency permits for the possibility to determine, even at the planning phase, the optimal connection point in the workspace, ensuring the best parameters for the process of machine assembly, without needless overestimation of precision of the utilized equipment. To solve the task the sequential quadratic programming (SQP) method implemented in the MATLAB(R) environment was used. To verify the hypothesis of the compatibility of the empirical distribution with the hypothetical distribution of the robot’s positioning error, the Kolmogorov test was used.Findings - In this paper, it has been demonstrated theoretically and experimentally that the industrial robot accuracy can vary over a very wide range in the workspace. This provides an additional opportunity to increase reliability of the assembly process through the appropriate choice of the point of parts joining. The methodology presented herein allows the designer of assembly workstations to rapidly estimate the repeatability of robot positioning and to allocate at the design stage of assembly process the optimal position in the robot workspace to ensure the required precision, without unnecessarily high accuracy of equipment used and, therefore, without inflated costs.Originality/value - An alternative solution to the stated problem can be the proposed method for determining the robot’s positioning errors, requiring a much smaller amount of measurements to be taken that would be necessary to determine the parameters of the random variable errors of the joint coordinates of the robot and for their verification by the repeatability of positioning in randomly selected points in the workspace. Additionally discussed in the study, the methodology of identifying connection place was designed for typical combinations of machine parts, most frequently encountered in assembly process and was taken into account typical limitations occurring in actual manufacturing conditions.
      PubDate: Tue, 29 Jul 2014 00:00:00 +010
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