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Mechanical Analysis of Shape Memory Alloy Beams under Asymmetric Bending 期刊论文
Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University, 2020, 卷号: 38, 期号: 4, 页码: 881-888
作者:  Yang, Jingning;  Wang, Yongxiang;  Ma, Liansheng
收藏  |  浏览/下载：5/0  |  提交时间：2020/11/14
确定斜拉屋盖结构拉索预应力的逐步去约束法 期刊论文
2016, 2016
朱博莉; 郭彦林; 马建勋; Zhu Boli; Guo Yanlin; Ma Jianxun
收藏  |  浏览/下载：6/0
A管道燃气公司市场营销方案的优化研究 学位论文
2016, 2015
陈复超
收藏  |  浏览/下载：4/0  |  提交时间：2017/06/20
磨削加工光学元件亚表面损伤探究 期刊论文
2014
叶卉; 杨炜; 胡陈林; 毕果; 彭云峰; 许乔
收藏  |  浏览/下载：5/0  |  提交时间：2016/05/17
An auto-focus algorithm of fast search based on combining rough and fine adjustment (EI CONFERENCE) 会议论文
3rd international Conference on Manufacturing Science and Engineering, ICMSE 2012, March 27, 2012 - March 29, 2012, Xiamen, China
Lin Z.; Liu X.; Zhang Y.; Zhang S.
收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25
A coarse and fine combined fast search and auto-focusing algorithm was suggested in this paper. This method can automatically search and find the focal plane by evaluating the image definition. The Krisch operator based edge energy function was used as the big-step coarse focusing  and then the wavelet transform based image definition evaluation function  which is sensitivity to the variation in image definition  was used to realize the small-step fine focusing in a narrow range. The un-uniform sampling function of the focusing area selection used in this method greatly reduces the workload and the required time for the data processing. The experimental results indicate that this algorithm can satisfy the requirement of the optical measure equipment for the image focusing. (2012) Trans Tech Publications.  
The Non-equidistant new information optimizing MGM(1,n) based on a step by step optimum constructing background value 期刊论文
Applied Mathematics and Information Sciences, 2012, 卷号: 6, 期号: 3, 页码: 745-750
作者:  Zou, Ruibiao*
收藏  |  浏览/下载：7/0  |  提交时间：2019/12/23
Structure buckling reliability analysis of supercavitating projectile (EI CONFERENCE) 会议论文
2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China
Zhou L.; Yang C.; Jia H.
收藏  |  浏览/下载：11/0  |  提交时间：2013/03/25
Because the underwater velocity of supercavitating projectile is very high  its structure undergo high longitudinal force. It is necessary to perform structure buckling reliability analysis because the randomicity of structural own parameters and flow parameters should be considered. Critical buckling load of supercavitating projectile is calculated by Galerkin method. The partial matrixes of critical buckling load implicit function to each random variable are deduced  and structural buckling reliability index is calculated by limit step length iteration method. Numerical results show that the critical buckling load and structural buckling reliability index increase with the increase of the ratio of base diameter to cavitator diameter. And structural buckling reliability index increase with the decrease of velocity coefficient. 2011 IEEE.  
Design and demonstration of micro multi-step mirrors and light source in micro FTIR (EI CONFERENCE) 会议论文
6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2011, February 20, 2011 - February 23, 2011, Kaohsiung, Taiwan
Liang Z.; Fu J.; Feng C.; Liang J.
收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25
To obtain high resolution  high signal-to-noise ratio (SNR)  high reliability and real time in wide spectral range  we study the space modulation Micro Fourier Transform Spectrometer (FTS) based on multi-step mirrors covering the spectral range of 3-5m and 8-12 m in theory and experiment. The influences of spectrum reconstruction caused by the diffraction and extended light source in Fourier Transform Infrared Spectrometer (FTIR) are analyzed. A method to reduce the noises in spectrum reconstruction and the relationship between coherent intensity and solid angle of light source are discussed. An extended light source with suitable size is chosen  considering the requirement of SNR and spectrum resolving power in the optical design. Furthermore  the fabrication of micro multi-step mirrors  which is the core part of FTS  is investigated. Three methods for fabricating multi-step micro mirrors are demonstrated. 2011 IEEE.  
Analysis of seismic vibration reduction of latticed shell with bucking restrained braces 会议论文
Guilin, China, April 9, 2011 - April 11, 2011
作者:  Yin, Zhan Zhong;  Wang, Xiu Li
收藏  |  浏览/下载：0/0  |  提交时间：2020/11/15
Inspection focus technology of space tridimensional mapping camera based on astigmatic method (EI CONFERENCE) 会议论文
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
Wang Z.; Zhang L.
收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25
The CCD plane of the space tridimensional mapping camera will be deviated from the focal plane(including the CCD plane deviated due to camera focal length changed)  under the condition of space environment and vibration  impact when satellite is launching  image resolution ratio will be descended because defocusing. For tridimensional mapping camera  principal point position and focal length variation of the camera affect positioning accuracy of ground target  conventional solution is under the condition of vacuum and focusing range  calibrate the position of CCD plane with code of photoelectric encoder  when the camera defocusing in orbit  the magnitude and direction of defocusing amount are obtained by photoelectric encoder  then the focusing mechanism driven by step motor to compensate defocusing amount of the CCD plane. For tridimensional mapping camera  under the condition of space environment and vibration  impact when satellite is launching  if the camera focal length changes  above focusing method has been meaningless. Thus  the measuring and focusing method was put forward based on astigmation  a quadrant detector was adopted to measure the astigmation caused by the deviation of the CCD plane  refer to calibrated relation between the CCD plane poison and the asrigmation  the deviation vector of the CCD plane can be obtained. This method includes all factors caused deviation of the CCD plane  experimental results show that the focusing resolution of mapping camera focusing mechanism based on astigmatic method can reach 0.25 m. 2010 Copyright SPIE - The International Society for Optical Engineering.  

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