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	High-Accurate Quantitative Phase Imaging Based on the Transport of Intensity Equation and Wavelet Transform 期刊论文 OAI收割 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2023, 卷号: 72 作者: Fan, Chen; Zhao, Hong; Zhao, Zixin; Li, Junxiang; Du, Yijun \| 收藏 \| 浏览/下载：26/0 \| 提交时间：2023/08/01 Estimation Wavelet transforms Lighting Imaging Image resolution Fitting Mathematical models Computational imaging phase retrieval quantitative phase imaging (QPI) transport of intensity equation (TIE) wavelet transform (WT)
	Impacts of mollic epipedon thickness and overloaded sediment deposition on corn yield in the Chinese Mollisol region 期刊论文 OAI收割 AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 2018, 卷号: 257, 页码: 175-182 作者: Wei Hu; Zhizhen Feng; Fenli Zheng; Guifang Li; Ximeng Xu \| 收藏 \| 浏览/下载：44/0 \| 提交时间：2018/09/25 Mollic Epipedon Thickness Overloaded Sediment Deposition Corn Yield Equation Fitting Chinese Mollisol Region
	Effects due to the anisotropic stretching of the surface-fitting grid on the traveltime computation for irregular surface by the coordinate transforming method 期刊论文 OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2012, 卷号: 55, 期号: 10, 页码: 3355-3369 作者: Lan Hai-Qiang; Zhang Zhi; Xu Tao; Bai Zhi-Ming \| 收藏 \| 浏览/下载：16/0 \| 提交时间：2018/09/26 Eikonal equation Travel time Topography Surface-fitting grid Anisotropy
	The method on the measurement of the aircraft attitude by the spatial cosines relationship of the single station and planes to the intersection the multi-station of electro-optical theodolite (EI CONFERENCE) 会议论文 OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Zhao L.-R.; Cao Y.-G. 收藏 \| 浏览/下载：16/0 \| 提交时间：2013/03/25 In order to realize the aircraft attitude measurement The paper advances electro-optical theodolite methods of measuring the aircraft attitude by using the spatial cosines relationship the single station theodolite and how to use intersection of the multi-station theodolite. The single station theodolite was introduced in a measured distance from the aircraft posture information. An exhaustive approach was used to access to the aircraft axis of the feature points and the location in the space was used to obtain space posture parameters. The multi-station theodolite was introduced to get the information of the aircraft flight attitude by method of using planes to the intersection. Two-dimensional image to obtain objective axis by fitting algorithm using Hough transform. And then Calculate the vertical distance of the origin to the target of the central axis and the origin to the target of the central axis of the angle between the normal and the X-axis obtaining the linear equation in the two-dimensional plane. Two-dimensional axis of the target image and the camera system's optical center only identified a space plane. The aircraft yaw axis angle and pitch angle can be obtained by getting the space axis using plains to the intersection method. Experimental results show that attitude angle error of the single station theodolite is less than 1 when its distance is less than 6000m and attitude angle error of the multi-station theodolite is less than 0.6 when its intersection angle is between 30 and 150. In this paper according to test result of precision comparing the mathematical model is correct and the algorithm is reasonable in extracting effective parameters of the aircraft's attitude. 2010 IEEE.
	Configuring an electrostatic membrane reflector with potentials exerted on distributed electrodes (EI CONFERENCE) 会议论文 OAI收割 2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China 作者: Zhang P.; Shi G. 收藏 \| 浏览/下载：19/0 \| 提交时间：2013/03/25 Electrostatic membrane reflector (EMR) is very promised for optical quality application with the merits of utra-lightweight and flexible. Configuring a circular membrane reflector with electrostatic potentials exerted on distributed electrodes can approximatively produce a parabolic shape. A 300mm EMR (made from polyimide) stretched by distributed electrodes below is designed and the number of concentric electrodes needed for membrane shape forming is analysed. First based on an analytical solution of Poisson's equation determine the membrane control matrix by finding influence functions of 3 concentric electrodes and 6 control points on membrane surface in order to compute the needed voltages exerted on the distributed electrodes by the method of least-squares fitting. Then the final shape solved by finite element analysis with ANSYS is contrasted with the paraboloid and deviates greatly when the central displacement of membrane is beyond 2.5mm but in this range increasing the number of electrodes and control points will get a better shape. The corresponding errors are analyzed and the control method is concluded. Only using the integrated method of analytical computation numerical analysis and experiment the membrane shape of certain central displacement can be exactly predicted and controlled. 2009 IEEE.
	Based on Householder transform of the Zernike polynomial wave front fitting method to solve active optics correction force (EI CONFERENCE) 会议论文 OAI收割 Infrared Materials, Devices, and Applications, November 12, 2007 - November 15, 2007, Beijing, China 作者: Wu X.-X. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 Corrective force solving is a critical technology of the active optics. A method to solve active optics corrective force is introduced which is based on Householder transform of Zernike polynomial wave front fitting this method is different from the traditional least square method and Gram-Schmid orthogonal method because it does not bring ill-conditioned polynomial without constructing normal equation so it can avoid calculation error wave front fitting is precision. Based on the coefficient of the Zernike polynomial and the response function of the each actuator the stiffness matrix of the primary mirror is built and then adopting the damp least square method to calculate corrective force. Based on this method cp400m test mirror is simulated many times the calculation result approve: if the Householder transform is adopted wave front fitting is precision the result is stabilization and corrective effectiveness is better.