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浏览/检索结果: 共5条，第1-5条 帮助 限定条件 发表日期：2010     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 马海-大红沟凸起油气勘探成果与柴达木盆地北缘的勘探方向 期刊论文 2010, 2010 汪立群; 徐凤银; 庞雄奇; 陈琰; 彭立才; WANG Li-qun; XU Feng-yin; PANG Xiong-qi; CHEN Yan; PENG Li-cai 收藏  |  浏览/下载：4/0 广西北部湾经济区发展战略探析 期刊论文 2010, 2010 唐琮沅; 景保峰; TANG Cong-yuan; JING Bao-feng 收藏  |  浏览/下载：1/0 Nonlinear analysis method for predicting optical surface deformations resulted from assembly process (EI CONFERENCE) 会议论文 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China Dong W.; Yong Y.; Guang J. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 There are three main nonlinear elements in the large mirror assemblies  which are screw pretension  adhesive stress and state changes in the assembly process. The optical shape will be influenced seriously by these factors. But the impacts will not be shown in linear analysis results  because as the simplification  these factors have been ignored. The nonlinear analysis method for predicting optical surface deformations resulted from assembly process is discussed in detail. Take a typical mirror support structure for example  the nonlinear analysis model was established. Comparing the calculation results with the optical shape test  it is illustrated that nonlinear analysis is more accurate and closer to the test result. And according to the simulation result  the bowl-shaped depression which was discovered in the test can also be explained reasonably. 2010 Copyright SPIE - The International Society for Optical Engineering.   Position servo control of a DC electromotor using a hybrid method based on model reference adaptive control (MRAC) (EI CONFERENCE) 会议论文 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Guo R.; Chen J.; Hao X. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 This paper dealed with position control problems of a DC motor servo system that had nonlinear friction and was subject to parametric uncertainties  external disturbances  etc. In order to overcame those unfavourable factors mentioned above  a model reference adaptive control method was proposed to regulate the important and main speed loop in the positioning system which was designed with three closed control loop  where a compensatory measure was given so as to counterbalance the friction torque disturbances. In addition  the other two close loops were built in adjusting the position and the current of the servo system respectively that aimed to achieve the fast and precise positioning and increase dynamic stiffness against load disturbances. Experimental results illustrate satisfactory performances in steady state error  load capability  high rapidity and so on. 2010 IEEE.   ANALYSIS ON INFLUENCE FACTORS OF THE CALCULATION OF HORIZONTAL WAVE FORCES ACTING ON MAIN GIRDERS OF BRIDGE 会议论文 International Symposium on Life-Cycle Performance of Bridges and Structures, JUL 27-29, 2010 作者:  Zhang, Xiantang;  Chen, Airong 收藏  |  浏览/下载：2/0  |  提交时间：2019/12/31 bridge engineering  main girder  horizontal wave force  influence  factors