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	Contrast test of the transient electromagnetic system (CASTEM) at the Dawangzhuang iron mine in Anhui province 期刊论文 OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2016, 卷号: 59, 期号: 12, 页码: 4448-4456 作者: Wu, Xin; Xue, Guo-Qiang; Chen, Wei-Ying; Wu, Kai; Qi, Lin \| 收藏 \| 浏览/下载：67/0 \| 提交时间：2017/11/20 Transient electromagnetic method CASTEM system Sensor Contrast test
	不同亮度条件下人眼对比敏感度函数形状研究会议论文 OAI收割 2016年第一届北京视觉科学会议, 北京, 2016-07 作者: Fang Hou; Yukai Zhao; Luis A. Lesmes; Zhong-Lin Lu 收藏 \| 浏览/下载：65/0 \| 提交时间：2017/01/09 Spatial Vision Contrast sensitivity Model comparison Bayesian adaptive test quick CSF
	Surface Electromagnetic Prospecting System (SEP) contrast test in Caosiyao molybdenum mine, inner mongolia 期刊论文 OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2015, 卷号: 58, 期号: 8, 页码: 2654-2663 作者: Di Qing-Yun; Xu Cheng; Fu Chang-Min; Wang Zhong-Xing; Zhang Wen-Xiu \| 收藏 \| 浏览/下载：24/0 \| 提交时间：2017/12/07 Electromagnetic exploration system Magnetic sensor Contrast test CSAMT MT
	The design of computer-generated holograms for testing unsymmetrical optical surfaces (EI CONFERENCE) 会议论文 OAI收割 2012 International Symposium on Photonics and Optoelectronics, SOPO 2012, May 21, 2012 - May 23, 2012, Shanghai, China 作者: Zhang X.; Zhang Y.; Zhang X.; Zhang X. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 It is a technical difficulty to test the unsymmtrical optical surfaces in non-contact methods. But we can do it using computer-generated holograms (CGH). The principle and design of the CGH have been discussed in the paper. Take the cubic suface as an example The order separation of the CGH is analyzed theoretically and the simulation result of the order separation is given in the paper. We develop the binary process of the continuous CGH phase function and get the sample of the amplitude CGH. A CGH for testing a cubic phase plate with duty cycle 0.5 is fabricated by using e-beam lithographic techniques. In this situation the contrast of the interference fringe pattern can achieve a level of 99.4% by calculation. 2012 IEEE.
	Mid-frequency surface error test with a Foucault apparatus (EI CONFERENCE) 会议论文 OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, July 8, 2007 - July 12, 2007, Chengdu, China 作者: Li J.; Li J.; Xuan B.; Li J. 收藏 \| 浏览/下载：17/0 \| 提交时间：2013/03/25 Testing of mid-frequency surface error is of the first importance for fast optics especially for large aperture aspherics. Foucault test plays a dominant role for surface error inspection before the digital interferometer age but it seems to have faded out these days because no quantitative results turn out. However an interferometer with high resolution CCDs is either unavailable or unaccessible in the process of manufacture. As its advantages are realized and recognized for the second time Foucault test is going back to the stage again. A new theory of calculating the contrast of the shadow pattern of Foucault test is put forward in this paper and some modifications are discussed upon the analyses of the limitation of traditional Foucault apparatus. A paraboloidal mirror was fabricated and tested by the modified Foucault apparatus whose effect has been proved to be great. The methods of controlling mid-frequency error are described in the other paper at this conference- "Multi-mode combine manufacturing technology for large aperture aspheric mirrors"1.
	Detection and tracking of low contrast targets based on integertype lifting wavelet transform (EI CONFERENCE) 会议论文 OAI收割 ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China 作者: Wang L.; Wang L.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 This paper presents a method for detecting and tracking of low contrast targets. The new method uses an integer-type lifting wavelet transform and the proposed method doesn't extract patterns similar to a template but finds parts having the same feature in the targets. We utilize one of integer-type lifting wavelet transforms that contains rounding-off arithmetic for mapping integers to integers. The lifting term contains parameters that are learned by using standard training images of targets. We assume that the targets include many high frequency components. In order to obtain the features of the targets the lifting parameters are determined by a condition that high frequency components are vanished in wavelet transform. But the condition cannot be determined by the parameters wholly. So we put an additional condition of minimizing the squared sum of the lifting parameters. The advantage of using integer-type wavelet transform is simple and robust to noise. Simulation illustrated the approach can detect and track the moving targets in dim background. We would test our algorithm in the TV tracking system.
	An edge extracting method of fuzzy thresholding value (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China Gu R.; Zhu M. 收藏 \| 浏览/下载：16/0 \| 提交时间：2013/03/25 This paper discusses image's object edge extracting of threshold value. First this paper introduces fundamental principle of gray image object edge extracting after discussing the influence of object edge image's gray scale distributing characteristic and choice of threshold value to character extracting and target identification we bring forward a sort of method which using object edge fuzzy taxonomy and maximum fuzzy entropy theory to auto choose threshold value in the case that membership function is given then we have a test of threshold value segmentation to edge gray image in different contrast the result indicates this method has preferable scene adaptive faculty.
	The replacement of dry heat in generic reliability assurance requirements for passive optical components (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China 作者: Zhang G.; Zhang G.; Zhang G. 收藏 \| 浏览/下载：23/0 \| 提交时间：2013/03/25 According to Generic Reliability Assurance Requirements for Passive Optical Components GR-1221-CORE (Issue 2 January 1999) reliability determination test of different kinds of passive optical components which using in uncontrolled environments is taken. The test condition of High Temperature Storage Test (Dry Test) and Damp Test is in below sheet. Except for humidity condition all is same. In order to save test time and cost after a sires of contrast tests the replacement of Dry Heat is discussed. Controlling the Failure mechanism of dry heat and damp heat of passive optical components the contrast test of dry heat and damp heat for passive optical components (include DWDM CWDM Coupler Isolator mini Isolator) is taken. The test result of isolator is listed. Telcordia test not only test the reliability of the passive optical components but also test the patience of the experimenter. The cost of Telcordia test in money manpower and material resources especially in time is heavy burden for the company. After a series of tests we can find that Damp heat could factually test the reliability of passive optical components and equipment manufacturer in accord with component manufacture could omit the dry heat test if damp heat test is taken first and passed.
	PSO based gabor wavelet feature extraction method (EI CONFERENCE) 会议论文 OAI收割 2004 International Conference on Information Acquisition, ICIA 2004, June 21, 2004 - June 25, 2004, Hefei, China 作者: Sun H.; Zhang Y.; Sun H. 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/25 In this paper the time of feature extraction is faster. By test in low contrast image 2D continues Gabor wavelets are adopted to realize feature extraction. By optimize Gabor wavelet's parameters of translation the feasibility and effectiveness of the algorithm are demonstrated by VC++ simulation platform in experiments. 2004 IEEE. orientation and scale to make it approximates a local image contour region. The method of Sobel edge detection is used to get the initial position and orientation value of optimization in order to improve the convergence speed. In the wavelet characteristic space we adopt PSO (particle swarm optimization) Algorithm to identify points on the security border of the system. Comparing to the LM algorithm it can ensure reliable convergence the target which can improve convergent speed