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	京津冀城市群地区能源供需关系及影响因素研究学位论文 OAI收割北京: 中国科学院生态环境研究中心, 2019 作者: 王朝 \| 收藏 \| 浏览/下载：41/0 \| 提交时间：2020/07/27 京津冀城市群，城市化，能源供需矛盾，能源供需结构，能源利用效率 Beijing-tianjin-hebei Urban Agglomeration, Urbanization,Contradiction Between Energy Supply And demAnd, Energy Supply And demAnd Structure,Energy Efficiency
	Comments on theoretical foundation of “EM Drive” 期刊论文 OAI收割 Acta Astronautica, 2018, 卷号: 144, 页码: 214-215 作者: Wu CW(吴臣武) \| 收藏 \| 浏览/下载：15/0 \| 提交时间：2018/05/11 Em Drive Theoretical Foundation Self-contradiction
	The Mirror Control System of Parabolic Trough Solar Thermal Based on DCS 会议论文 OAI收割 2nd International Conference on Intelligent Materials and Mechatronics and 2nd International Conference on Solar Energy Materials and Energy, Hong Kong, October 29-30, 2015 作者: Wang CX(王晨曦); Liu MZ(刘明哲); Xu AD(徐皑冬); Jin N(金妮) 收藏 \| 浏览/下载：18/0 \| 提交时间：2016/09/13 Solar contradiction sustainable trough mirror Mirror urgently shortage parabolic rotation
	Nonlinear control design for system with mechanical resonance based on two tracking-differentiators (EI CONFERENCE) 会议论文 OAI收割 2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China 作者: Li J.; Li Y.; Li Y.; Li Y.; Li Y. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 A nonlinear control strategy for controlling a motion system with mechanical resonance is presented in this paper. A mathematical model of the servo system is derived according to the parameters of an actual system. By using two Tracking-Differentiators reference input and system output are tracked and their differential signals are given simultaneously. A nonlinear PD control law in velocity loop is designed based on non-smooth feedback. The simulation results show that the control law is superior remarkably in performance to linear PD control law and the classical PID control law. Tracking-Differentiator resolves the contradiction between rapidity and overshoot of system response. The nonlinear PD control law improves system dynamic performance and intensifies the ability of disturbance rejection. The control design achieved in this paper makes the servo system more robust. 2010 IEEE.
	Adaptive resolution storage system based on LOG-POLAR transform for multi-target trackers (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 作者: Zhang Y. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 The main constrained problem of the video monitoring and storage system is the contradiction between large field of view and storage space limitations. Not all of the video information introduced by the image sensors need to be recorded especially for some tracking system which has appointed functions to track specifically kinds of targets. For instance the system not only works for single target if the monitor is appointed for human face tracking but also can work for multi-targets. High reconstruction resolution in the fovea region enables the successive application of recognition modules without sacrificing their performance the best system appears to be concentrating on human face only and all the others considered being background the low reconstruction resolution in the periphery helps to reduce the video data. 2010 IEEE. the background regions needn't to be recorded in detail. For this purpose this letter presents a real-time foveate storage system which efficiently represents the video image in log-polar coordinates with the foveate point centered on the target
	SUSTAINABLE DEVELOPMENT FACING CHALLENGESIN 21ST CENTURY 期刊论文 OAI收割中国地理科学：英文版, 2001, 卷号: 000, 期号: 004, 页码: 289-7 作者: Chen Guojie \| 收藏 \| 浏览/下载：8/0 \| 提交时间：2021/03/01 sustainable development contradiction between human and the earth 21st century