中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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The relationship between interannual dry/wet changes and nomadic wars in the Hexi Corridor region of China during the period 241-1912 AD 期刊论文  OAI收割
SCIENCE CHINA-EARTH SCIENCES, 2024, 卷号: N/A
作者:  
Tang, Fei;  Shi, Zhilin;  Tian, Qinhua;  Du, Xiaogang;  Zhang, Yong
  |  收藏  |  浏览/下载:19/0  |  提交时间:2024/06/17
The possibilities of internationalism: Producing traveling geographies in a time of trouble 期刊论文  OAI收割
DIALOGUES IN HUMAN GEOGRAPHY, 2023
作者:  
Cheng, Han
  |  收藏  |  浏览/下载:6/0  |  提交时间:2023/07/14
The Global South political economy of health financing and spending landscape - history and presence 期刊论文  OAI收割
JOURNAL OF MEDICAL ECONOMICS, 2021, 卷号: 24, 页码: 25-33
作者:  
Jakovljevic, Mihajlo;  Liu, Yansui;  Cerda, Arcadio;  Simonyan, Marta;  Correia, Tiago
  |  收藏  |  浏览/下载:31/0  |  提交时间:2022/09/21
China's Detonation-driven Shock Tube Wind Tunnels: A Case Study of Transnational Science in Aeronautics during the Cold War 期刊论文  OAI收割
EAST ASIAN SCIENCE TECHNOLOGY AND SOCIETY-AN INTERNATIONAL JOURNAL, 2021, 页码: 28
作者:  
Zhihu, Zhang;  Seely, Bruce E.
  |  收藏  |  浏览/下载:15/0  |  提交时间:2022/07/01
Characteristics of convective structures of sodium layer in lower thermosphere (105-120 km) at Haikou (19.9 degrees N, 110.34 degrees E), China 期刊论文  OAI收割
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2017, 卷号: 164, 页码: 132-141
作者:  
Jiao, Jing;  Yang, Guotao;  Wang, Jihong;  Zhang, Tiemin;  Peng, Hongyan
  |  收藏  |  浏览/下载:28/0  |  提交时间:2018/02/28
Re-interpretation of the classical geopolitical theories in a critical geopolitical perspective SCI/SSCI论文  OAI收割
2016
作者:  
Hu Z. D.;  Lu, D. D.
  |  收藏  |  浏览/下载:25/0  |  提交时间:2017/11/09
Analysis of zenith pass problem in a roll-pitch optics seeker (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
作者:  
Jiang H.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
There are mainly two kind of structures for a missile two-axes seeker  which is always mentioned as elevate-azimuth and roll-pitch. The elevate-azimuth structured seeker has been studied for a long time  and it is applied in all sort of missiles. Not only structure design but also control algorithm of the elevate-azimuth seeker are deeply developed. But for elevate-azimuth seeker there are several disadvantages such as big size and large abaxial angle blind. So the elevate-azimuth seeker gimbal angle is designed up to 65 according to relative references. In modern air war  it is important for a missile to have the ability of "first recognize" and "first attack". That means the air to air missile seeker is required to be a system with large gimbal angle and large abaxial launch angle. With the mentioned requirement  roll-pitch seeker with its advantages smart size and large gimbal angle is studied widely and deeply. The pitch angle of roll-pitch is up to 90 while its roll angle up to n 360. But there are also some disadvantages for the roll-pitch seeker  the most troublesome one is the zenith pass problem. The zenith pass problem is brought about from the gimbal kinematics  it is said that when target moves in the center of image plane  roll servo command gotten from the kinematics algorithm will go to infinite. Math model of zenith pass problem is proposed in this paper and two ways to solve the problem are brought forward. 2011 IEEE.  
Force-velocity relations for multiple-molecular-motor transport 期刊论文  OAI收割
PHYSICAL REVIEW E, 2009, 卷号: 80, 期号: 4, 页码: -
作者:  
Wang, Ziqing;  Li, Ming;  Wang, ZQ , NW A&F Univ, Coll Sci, Yangling 712100, Shaanxi, Peoples R China
  |  收藏  |  浏览/下载:26/0  |  提交时间:2012/08/02
Environmental impact assessment of chemical process using the green degree method 期刊论文  OAI收割
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2008, 卷号: 47, 期号: 4, 页码: 1085-1094
作者:  
Zhang, Xiangping;  Li, Chunshan;  Fu, Chao;  Zhang, Suojiang
收藏  |  浏览/下载:31/0  |  提交时间:2013/10/08
Global climate change, war, and population decline in recent human history 期刊论文  iSwitch采集
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2007, 卷号: 104, 期号: 49, 页码: 19214-19219
作者:  
Zhang, David D.;  Brecke, Peter;  Lee, Harry F.;  He, Yuan-Qing;  Zhang, Jane
收藏  |  浏览/下载:26/0  |  提交时间:2019/10/08