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	Field test and semi-analytical simulation of unsaturated road subgrade in various water content subjected to a heavy duty truck 期刊论文 OAI收割 SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 2021, 卷号: 144, 期号: -, 页码: 12 作者: Lu, Zheng; Tang, Chuxuan; Duan, Yahui; Fang, Ran; Yao, Hailin \| 收藏 \| 浏览/下载：35/0 \| 提交时间：2021/09/14 Field test Unsaturated soil Dynamic response Stiffness matrix method Analytical simulation
	Field evaluation and analysis of road subgrade dynamic responses under heavy duty vehicle 期刊论文 OAI收割 INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING, 2018, 卷号: 19, 期号: 12, 页码: 1077-1086 作者: Lu, Zheng; Hu, Zhi; Yao, Hai-lin; Liu, Jie \| 收藏 \| 浏览/下载：49/0 \| 提交时间：2018/12/29 Field evaluation road vibration heavy vehicle stiffness matrix method analytical simulation Fast Fourier Transform (FFT)
	Field evaluation and analysis of road subgrade dynamic responses under heavy duty vehicle 期刊论文 OAI收割 INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING, 2018, 卷号: 19, 期号: 12, 页码: 1077-1086 作者: Lu, Zheng; Hu, Zhi; Yao, Hai-lin; Liu, Jie \| 收藏 \| 浏览/下载：38/0 \| 提交时间：2020/04/08 Field evaluation road vibration heavy vehicle stiffness matrix method analytical simulation Fast Fourier Transform (FFT)
	An analytical method for evaluating highway embankment responses with consideration of dynamic wheel-pavement interactions 期刊论文 OAI收割 SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 2016, 卷号: 83, 页码: 135-147 作者: Liu, Jie; Lu, Zheng; Hu, Zhi; Yao, Hailin; Zhan, Yongxiang \| 收藏 \| 浏览/下载：32/0 \| 提交时间：2018/06/05 Highway Pavement unevenness Wheel-pavement interaction Stiffness matrix method Moving vehicle
	Stiffness and elastic deformation of a 3-leg 5-dof parallel manipulator with one composite leg 期刊论文 OAI收割 International Journal of Robotics and Automation, 2014, 卷号: 29, 期号: 1, 页码: 23-31 作者: Lu Y(路懿); Yu JJ(于晶晶); Chen LW(陈立伟); Hu B(胡波); Zhang XL(张秀礼) 收藏 \| 浏览/下载：47/0 \| 提交时间：2014/04/16 Finite element method Manipulators Stiffness Stiffness matrix
	A parametric study of effective phase velocity of surface waves in layered media 期刊论文 OAI收割 COMPUTERS AND GEOTECHNICS, 2012, 卷号: 44, 页码: 176-184 作者: Cui, Yu-Jun; Wei, Chang-Fu; Chai, Hua-You \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2018/06/05 Thin layer stiffness matrix method Surface waves Mode Dispersion Effective phase velocity Mode incompatibility
	Research of active supporting technology based on 400mm thin mirror (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China 作者: Liu X.-Y.; Wang J.-L.; Wang J.-L.; Liu X.-Y. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 Using a spherical mirror of 400mm diameter and 12mm thickness active supporting technology of thin mirror is researched. The axial support of the mirror is composed of 12 active supports and 3 fixed supports. The force actuator which is composed of displacement actuator and force sensor is installed in the active support. The mirror surface is tested by Zygo interferometer. For calibration each actuator exerts unit force alone and the surface variation is tested and taken as the response function of the actuator. The response functions of all actuators compose the stiffness matrix. Then the stiffness matrix is used by damped least square method to determine the correction force of each active support. In order to analyze the correction capability of the active supports 14 Zernike modes of the mirror surface are generated and tested respectively and 7 modes are selected for correction. Initially the RMS error of mirror surface is 1.16 I( =0.6328nm)when all actuators exert the same force. After 5 iterations the RMS error of mirror surface is reduced to 0.13 close to the original surface quality. 2010 Copyright SPIE - The International Society for Optical Engineering.
	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：26/0 \| 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.