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浏览/检索结果: 共13条，第1-10条 帮助

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The research of single point diamond turning Fresnel lens technology 会议论文  OAI收割
Chengdu, China, June 26, 2018 - June 29, 2018
作者:  Huang, Yuetian;  Fan, Bin;  Wan, Yongjian;  Li, Shijie
  |  收藏  |  浏览/下载：20/0  |  提交时间：2021/05/06
Influence of water cooling on microstructure and mechanical properties of friction stir welded 2014Al-T6 joints 期刊论文  OAI收割
Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2014, 卷号: 614, 页码: 6-15
Z. Zhang; B. L. Xiao; Z. Y. Ma
收藏  |  浏览/下载：107/0  |  提交时间：2015/01/14
Non-point source pollution modelling using Soil and Water Assessment Tool and its parameter sensitivity analysis in Xin'anjiang catchment, China SCI/SSCI论文  OAI收割
2014
作者:  Xia J.;  Liang T.
收藏  |  浏览/下载：35/0  |  提交时间：2014/12/24
Microstructure and mechanical properties of Al-Mg-Er sheets jointed by friction stir welding 期刊论文  OAI收割
Materials & Design, 2013, 卷号: 52, 页码: 706-712
H. L. Hao; D. R. Ni; Z. Zhang; D. Wang; B. L. Xiao; Z. Y. Ma
收藏  |  浏览/下载：22/0  |  提交时间：2013/12/24
Effect of Temperature on Material Transfer Behavior at Different Stages of Friction Stir Welded 7075-T6 Aluminum Alloy 期刊论文  OAI收割
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2013, 卷号: 29, 期号: 10, 页码: 955-960
作者:  Ji S D;  Jin Y Y;  Yue Y M;  Gao S S;  Huang Y X
  |  收藏  |  浏览/下载：14/0  |  提交时间：2021/02/26
The sequence measurement system of the IR camera (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者:  Zhang H.-B.;  Han H.-X.;  Geng A.-H.
收藏  |  浏览/下载：36/0  |  提交时间：2013/03/25
Currently  the IR cameras are broadly used in the optic-electronic tracking  optic-electronic measuring  fire control and optic-electronic countermeasure field  but the output sequence of the most presently applied IR cameras in the project is complex and the giving sequence documents from the leave factory are not detailed. Aiming at the requirement that the continuous image transmission and image procession system need the detailed sequence of the IR cameras  the sequence measurement system of the IR camera is designed  and the detailed sequence measurement way of the applied IR camera is carried out. The FPGA programming combined with the SignalTap online observation way has been applied in the sequence measurement system  and the precise sequence of the IR camera's output signal has been achieved  the detailed document of the IR camera has been supplied to the continuous image transmission system  image processing system and etc. The sequence measurement system of the IR camera includes CameraLink input interface part  LVDS input interface part  FPGA part  CameraLink output interface part and etc  thereinto the FPGA part is the key composed part in the sequence measurement system. Both the video signal of the CmaeraLink style and the video signal of LVDS style can be accepted by the sequence measurement system  and because the image processing card and image memory card always use the CameraLink interface as its input interface style  the output signal style of the sequence measurement system has been designed into CameraLink interface. The sequence measurement system does the IR camera's sequence measurement work and meanwhile does the interface transmission work to some cameras. Inside the FPGA of the sequence measurement system  the sequence measurement program  the pixel clock modification  the SignalTap file configuration and the SignalTap online observation has been integrated to realize the precise measurement to the IR camera. Te sequence measurement program written by the verilog language combining the SignalTap tool on line observation can count the line numbers in one frame  pixel numbers in one line and meanwhile account the line offset and row offset of the image. Aiming at the complex sequence of the IR camera's output signal  the sequence measurement system of the IR camera accurately measures the sequence of the project applied camera  supplies the detailed sequence document to the continuous system such as image processing system and image transmission system and gives out the concrete parameters of the fval  lval  pixclk  line offset and row offset. The experiment shows that the sequence measurement system of the IR camera can get the precise sequence measurement result and works stably  laying foundation for the continuous system. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
Design and calibration of the solar irradiance monitor (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者:  Yang D.-J.;  Gong C.-H.;  Wang Y.-P.;  Ye X.;  Fang W.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
The solar irradiance monitor (SIM)  with the design accuracy of 5  used to monitor the secular changes of the total solar irradiance on FY-3 satellite  takes the sun-scanning measurement method on-orbit. Compared to the sun-tracking measurement method  this method simplifies the structure and cuts the cost  but the measuring accuracy is affected by the sun-synchronous orbit  sunlight incidence angle and the installing angle of the SIM in the satellite. Through the ground calibration experiment  studies on the affection of different sunlight incidence angles to the measurement accuracy. First  by the satellite tool kit (STK) simulation software  simulates the orbital parameters of the sun-synchronous satellite  and calculates the Sun ascension and declination at any time. By the orbit coordinate transformation matrix gets the components of the Sun vectors to the axes of the satellite  and base on the components designs the field of view and the installing angles of the SIM. Then  designs and completes the calibration experiment to calibrate the affection of the incidence angles. Selecting 11 different angles between the sunlight and the satellite X-axis  measures the total solar irradiance by the SIM at each angle  and compares to the irradiances of the SIAR reference radiometers  and gets the coefficient curves of the three channels of the SIM. Finally  by the quadratic fitting  gets the correction equations on the incidence angles: R 1=5.7110-52 -2.45310 -3+1.0302  R2=2.8410-5-1. 96510-3+1.0314 and R3 =1.7210 -52-4.18410-4+0.9946. The equations will aimprove the on-orbit measurement accuracy of the solar irradiance  and are very important to the on-orbit data processing after the satellite launched. 2011 SPIE.  
The design of chisel-edge ruling tool for diffraction gratings (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
作者:  Zhang F.;  Zhang F.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
The process of parameters design on chisel-edge ruling tool of diffraction grating  which is inefficient and highly costive  needs plenty ruling experience came from a series of ruling test to optimize and design it. In order to reduce the choosing range of experiential design parameters on chisel-edge grating ruling tool  to improve efficiency  and to reduce costs  this paper summarize the experimental results of several gratings ruling process for the experiential design on parameters of chisel-edge ruling tool. Provide the specific parameters choosing range as follows: that the blaze angle and directional angle difference in less than 3  the bottom angle and apex angle difference in less than 5. Apex angle larger than the groove bottom angle in conventional grating  while apex angle smaller than the bottom angle in echelle grating  and the directional angle smaller than blaze angle in both condition. 2011 IEEE.  
Effect of Alclad Layer on Material Flow and Defect Formation in Friction-Stir-Welded 2024 Aluminum Alloy 期刊论文  OAI收割
Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science, 2011, 卷号: 42A, 期号: 6, 页码: 1717-1726
Z. Zhang; B. L. Xiao; D. Wang; Z. Y. Ma
收藏  |  浏览/下载：33/0  |  提交时间：2012/04/13
A Transient Thermal Model for Friction Stir Weld. Part I: The Model 期刊论文  OAI收割
Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science, 2011, 卷号: 42A, 期号: 10, 页码: 3218-3228
X. X. Zhang; B. L. Xiao; Z. Y. Ma
收藏  |  浏览/下载：25/0  |  提交时间：2012/04/13