机构

• 地理科学与资源研究所 [1]
• 长春光学精密机械与物... [1]
• 上海药物研究所 [1]
• 遥感与数字地球研究所 [1]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• EI期刊论文 [1]
• 期刊论文 [1]

发表日期

• 2013 [1]
• 2009 [1]
• 2008 [2]

学科主题

筛选

浏览/检索结果: 共4条，第1-4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 Reflections on the Bridging Methods in the Early Exploratory General Toxicology Study 期刊论文  OAI收割 Chinese Pharmaceutical Journal, 2013, 卷号: 48, 期号: 21, 页码: 1785-1788 作者:  Liu Yongzhen;  Gong Likun;  Ren Jin   |  收藏  |  浏览/下载：18/0  |  提交时间：2019/01/08 acute toxicity study  maximum tolerated dose  dose range finding study   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：18/0  |  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.   Climate, agricultural production and hydrological balance in the North China Plain EI期刊论文  OAI收割 2008 作者:  Yu Qiang;  Xia Jun 收藏  |  浏览/下载：33/0  |  提交时间：2012/06/11 Biochemical oxygen demand  Climate change  Crops  Ecosystems  Evapotranspiration  Grain (agricultural product)  Groundwater  Hydrogeology  Irrigation  Plants (botany)  Range finding  Underground reservoirs  Water conservation  Water supply   A new method to retrieve soil moisture at bare soil surface using ERS scatterometer data 会议论文  OAI收割 2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings, Boston, MA, United states, July 6, 2008 - July 11,2008 Sun, Ruijing; Shi, Jiancheng; Jiang, Lingmei; Du, Jinyang 收藏  |  浏览/下载：23/0  |  提交时间：2014/12/07 Geologic models  Antennas  Backscattering  Groundwater  Meteorological instruments  Moisture determination  Permittivity  Photoresists  Range finding  Remote sensing  Soil moisture  Soil testing  Surface properties  Surface roughness