for Journals by Title or ISSN
for Articles by Keywords
help
Followed Journals
Journal you Follow: 0
 
Sign Up to follow journals, search in your chosen journals and, optionally, receive Email Alerts when new issues of your Followed Jurnals are published.
Already have an account? Sign In to see the journals you follow.
Precision Instrument and Mechanology
   [3 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 2304-1811 - ISSN (Online) 2304-182X
     Published by World Academic Publishing Homepage  [28 journals]
  • Study of Graded Index and Truncated Apertures Using Speckle Images

    • Abstract: Study of Graded Index and Truncated Apertures Using Speckle Images
      Pages 144-152
      Author Abdallah Hamed
      In this paper, apertures in the form of graded index distribution and truncated apertures are investigated. The 1st type of graded index aperture has central black zone followed by steps with increased intensity directed outwards. The second aperture has successive black and transparent annuls with central opaque zone. The third has four different truncated apertures. Digital diffuser is fabricated to get modulated speckle images for all described apertures. The profile of the speckle images and the corresponding autocorrelation profiles are plotted and the speckle sizes are computed for the different cited apertures. A Mat-lab code is written to compute and plot all of the above images.
      PubDate: 2014-01-26
       
  • Study on Digitized Measuring Technique of Thrust Line for Rocket Nozzle

    • Abstract: Study on Digitized Measuring Technique of Thrust Line for Rocket Nozzle
      Pages 153-158
      Author Lijuan Li,Jiaojiao Ren,Xin Yang,Yundong Zhu
      A digitized measurement method was detailed for nozzle thrust line of solid rocket motor based on advanced non-contact measuring technology with laser radar. The principle of this measurement method and the self-calibration technology of tolling ball are deeply researched. It proposes a new measuring scheme for thrust line which aiming at the front and back face circularity, circular zero line and the inner 3-D shape of the motor nozzle. The thrust line is obtained through the proper optimization model, and experiment testing shows that this measurement method provides higher measuring precision and efficiency which ensure the accuracy of thrust line direction.
      PubDate: 2014-01-26
       
 
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
 
About JournalTOCs
API
Help
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-2014