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浏览/检索结果: 共11条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 The detection method of sidelobe peaks parameter in weak signal regions based on NVPCA Image enhancement 会议论文  OAI收割 Beijing, China, 2023-07-25 作者:  Wang, Zhengzhou;  Wei, Jitong;  Wang, Li   |  收藏  |  浏览/下载：8/0  |  提交时间：2024/02/07 Far field measurement  NVPCA  Diffraction inversion of sidelobe beam  Angle transformation  Parameter detection of sidelobe peaks   Reasonable selection of yield criteria for quantitative analysis of unsaturated soil slope stability 期刊论文  OAI收割 Journal of Mountain Science, 2016, 卷号: 13, 期号: 7, 页码: 1304-1312 作者:  LIU Zi-zhen;  YAN Zhi-xin;  REN Zhi-hua;  QIU Zhan-hong;  DUAN Jian 收藏  |  浏览/下载：31/0  |  提交时间：2016/06/24 Unsaturated soil slope  Yield criteria  Parameter transformation  Rainfall  Safety factor   Scene transformation for detector adaptation 期刊论文  OAI收割 PATTERN RECOGNITION LETTERS, 2014, 卷号: 36, 页码: 154-160 作者:  Liu, Liwei;  Xing, Junliang;  Duan, Genquan;  Ai, Haizhou;  Junliang Xing 收藏  |  浏览/下载：36/0  |  提交时间：2015/08/12 Vehicle detection  Detector adaptation  Scene transformation  Automatic parameter estimation   Controlling reversible martensitic transformation in titanium alloys with high strength and low elastic modulus 期刊论文  OAI收割 Scripta Materialia, 2012, 卷号: 67, 期号: 5, 页码: 487-490 Y. L. Hao; S. J. Li; F. Prima; R. Yang 收藏  |  浏览/下载：33/0  |  提交时间：2013/02/05 Martensitic transformation  Titanium alloys  Elastic behavior  Strength  Lattice parameter  shape-memory  deformation behavior  plastic-deformation  alpha''  martensite  fatigue properties  youngs modulus  superelasticity  zr  sn   A novel approach for the registration of weak affine images 期刊论文  OAI收割 PATTERN RECOGNITION LETTERS, 2012, 卷号: 33, 期号: 12, 页码: 1647-1655 作者:  Li, Dong;  Zhang, Yunhua 收藏  |  浏览/下载：22/0  |  提交时间：2014/12/15 Fast least trimmed squares (Fast-LTS)  Image registration  Parameter estimation  Random sample consensus (RANSAC)  Weak affine transformation   Space camera dynamic image quality measurement and evaluation (EI CONFERENCE) 会议论文  OAI收割 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China 作者:   收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 By using analysis of the infinity image of the space camera  we intend to obtain the curve of the dynamic modulation transfer function. We extract the pixel gray values at the image edge which distribute as a knife-edge function  and make differential calculation and Fourier transformation of it  and then we can obtain the dynamic MTF curve of the optical system. The value of the curve at the Nyquist frequency is the most important parameter that reflects the image quality. We add push-scanning imaging and environmental effects to the static MTF of space camera and compare the MTF value with the dynamic MTF at Nyquist frequency. The comparison result can help us verify the accuracy of the calculating results and the feasibility of our method. (2011) Trans Tech Publications.   Miniaturize photoelectric stable platform (EI CONFERENCE) 会议论文  OAI收割 2010 International Conference on Computer Application and System Modeling, ICCASM 2010, October 22, 2010 - October 24, 2010, Shanxi, Taiyuan, China Xue W.-Q.; Wang Y.-Y.; Dai M. 收藏  |  浏览/下载：79/0  |  提交时间：2013/03/25 In order to reduce the size and weight of the gimbal in a traditional stable platform and correct the disadvantage in size of the payload  the paper first improves the gimbal which is an important component of a stable photoelectric platform  that also is an important factor in affecting the size and weight of a stability platform. In this paper  a closed-form solution of 3-DOF manipulator is designed according mechanical arm design principles. This manipulator is formed by a three joint axes whose extended line is intersected at one point. A standard orthogonal coordinate system is set up for each rod in the manipulator. And then  rotation transformation matrix expression is obtained. At last in this paper  the manipulator arm-shaped method for solving solutions is description  and also  each parameter of the gimbal is calculated when the photoelectric detection devices at bottom reach the expected position. Test results show that the photoelectric stability platform with gimbal we designed is smaller  lighter and simpler than that traditional. Also  the packaging and size of the photoelectric will not be affected with this open structure. 2010 IEEE.   Parameter identification of airborne vibrated image based on high-speed CCD (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 Shi J.; Xue X.; Guo Y. 收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25 In order to identify the vibration parameters of a vibrated image  the principle and shortage of the traditional methods that based on image derivative and image transformation are analyzed  and a new parameter identification method is proposed afterward. By placing a high-speed CCD aside the master CCD  the vibration can be sampled accurately  and more information can be obtained for parameter identification. The series frames that captured by high-speed CCD are processed by gray projection algorithm and the vibration extents between adjacent frames along x and y direction are obtained. By using simple triangle operations  the vibration parameters can be identified  and the computational complexity of which can be reduced greatly. The experiment shows that the parameter identification method based on high-speed CCD can identify the parameters of vibration with any form accurately. The precise of parameter identification for linear vibration is less than 2.95%. 2010 IEEE.   Models for extremes using the extended three-parameter Burr XII system with application to flood frequency analysis SCI/SSCI论文  OAI收割 2004 作者:  Xia J. 收藏  |  浏览/下载：20/0  |  提交时间：2012/06/08 extended Burr XII distribution  flood frequency analysis  generalized  Pareto distribution  limiting distribution  log-logistic distribution  Pareto distribution  Weibull distribution  generalized pareto distribution  maximum-likelihood-estimation  parameter-estimation  order-statistics  distributions  transformation  quantile   Microstructure and mechanical properties of Fe-Mn-Ge alloys 期刊论文  OAI收割 Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2003, 卷号: 347, 期号: 1-2, 页码: 258-264 X. Lu; B. Zhang; Z. X. Qin; Y. S. Zhang; B. Z. Ding; Z. Q. Hu 收藏  |  浏览/下载：24/0  |  提交时间：2012/04/14 Fe-Mn-Ge alloy  microstructure  lattice parameter  internal stress  gamma -> epsilon martensitic transformation  shape-memory alloys  martensitic-transformation  ni  cr  temperature  transition  behavior