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Sexual dimorphism, temporal niche differentiation, and evidence for the Jack Sprat effect in an annual dioecious plant 期刊论文  OAI收割
JOURNAL OF SYSTEMATICS AND EVOLUTION, 2021
作者:  
Yu,Qian;  Barrett,Spencer C. H.;  Wang,Xin-Jia;  Zhong,Li;  Wang,Hong
  |  收藏  |  浏览/下载:61/0  |  提交时间:2022/04/02
Globalization and Regionalization: Empirical Evidence from Itinerary Structure and Port Organization of World Cruise of Cunard 期刊论文  OAI收割
SUSTAINABILITY, 2020, 卷号: 12, 期号: 19, 页码: 17
作者:  
Li, Xumao;  Wang, Chengjin;  Ducruet, Cesar
  |  收藏  |  浏览/下载:14/0  |  提交时间:2021/03/16
Globalization and Regionalization: Empirical Evidence from Itinerary Structure and Port Organization of World Cruise of Cunard 期刊论文  OAI收割
SUSTAINABILITY, 2020, 卷号: 12, 期号: 19, 页码: 17
作者:  
Li, Xumao;  Wang, Chengjin;  Ducruet, Cesar
  |  收藏  |  浏览/下载:16/0  |  提交时间:2021/03/16
Interactions with reconfigurable modular robots enhance spatial reasoning performance 期刊论文  OAI收割
IEEE Transactions on Cognitive and Developmental Systems, 2020, 卷号: 12, 期号: 2, 页码: 300-310
作者:  
Yu, Minjing;  YLiu, Yong-Jin;  Zhang, Yulin;  Zhao, Guozhen;  Yu, Chun
  |  收藏  |  浏览/下载:51/0  |  提交时间:2020/07/07
The influence of spatial ability and experience on performance during spaceship rendezvous and docking 期刊论文  OAI收割
FRONTIERS IN PSYCHOLOGY, 2015, 卷号: 6, 期号: 0, 页码: 955
作者:  
Du, Xiaoping;  Zhang, Yijing;  Tian, Yu;  Huang, Weifen;  Wu, Bin
收藏  |  浏览/下载:31/0  |  提交时间:2015/12/07
Predicting performance in manually controlled rendezvous and docking through spatial abilities 期刊论文  OAI收割
ADVANCES IN SPACE RESEARCH, 2014, 卷号: 53, 期号: 2, 页码: 362-369
作者:  
Wang, Chunhui;  Tian, Yu;  Chen, Shanguang;  Tian, Zhiqiang;  Jiang, Ting
收藏  |  浏览/下载:28/0  |  提交时间:2015/09/18
Imaging system effects on the measuring accuracy of the optical surface in interferometer (EI CONFERENCE) 会议论文  OAI收割
3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China
Yang W.; Liu M.; Xu W.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
In order to measure high accuracy or mid spatial frequency optical surfaces  this study investigated imaging system in Fizeau interferometer. Interferometer is a transferring phase information system. General transfer function can't evaluate the ability of imaging system in interferometer that transfers the phase information of the optical surface. So this paper deduced instrument transfer function (ITF) and used ITF to evaluate the phase information transfer ability of interferometer. We obtained some results about ITF of imaging system by numerical simulation when there are different aberrations in imaging system or measuring optical surfaces were different. Our results indicate that ITF can evaluate the ability of transferring phase information in interferometer and the distortion of imaging system evidently affects the accuracy of interferometric measurements. 2010 IEEE.  
Research on the support structure of the primary mirror of large-aperture telescope (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
Yang W.; Jingxu Z.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
Large-aperture telescope can be used in surveying battlefield  researching landform  searching object  real-time monitoring  imaging  detecting and identifying spatial targets and so on. A large-aperture telescope for achieving high resolution power is designed to monitor spatial target and image in real time. Real-time monitoring plays an important role in military conflicts. The orbit parameter of object  quantity  geometrical shape parameter and so on can be obtained by detect spatial target. With the development of optical technology  people require larger aperture in optics-electronic (OE) system. By increasing optical aperture  the ability of collecting light and resolution power in the system can be enhanced. But the support structure of the primary mirror of large-aperture telescope will be a very difficult problem. With the increase of primary mirror aperture  the weight of the primary mirror will become larger than before. The root mean square (rms) of the primary mirror is affected by many factors  such as deadweight  deformation of heat  environment and so on. Due to the primary mirror of telescope is an important component of telescope system. By reducing the weight of primary mirror  precision of the system is ensured. During the designing phase  one can consider the supporting project of the primary mirror synthetically and analyze it roundly according to technical requirement of optical system and the effect factors. The final structural design can be reasonable. In an astronomical telescope  the surface of reflector is an important part for collecting dark radiation of celestial bodies. Its surface shape will have an effect on collecting efficiency of telescope radiant energy directly. So the rms must be very high. Optical system of large aperture  small wavelength and small focus can receive maximal light intensity. For ground-based optical astronomical telescope  the design proposed in the paper can satisfy the requirement of the possible minimum atmosphere seeing at astronomical observatory site and exert the use efficiency of the telescope adequately. So the accuracy of the traditional surface of reflector can assure that 90% of all the light energy can be focused on within the angle diameter range of the minimum atmosphere seeing  then 100% of light energy should be focused on the angle diameter range of minimum atmosphere seeing. Because the rms of mirror is very high  precise surface machining and accurate the support of mirror are very important tasks during designing and manufacturing the telescope. In the paper  various support techniques of a large-aperture telescope primary mirror are discussed and a 3.5 meter telescope system at the Starfire Optical Range (SOR) overviewed simply  which was operated by the Directed Energy Directorate of the Air Force Research Laboratory  Kirtland AFB  NM  USA from the ground-based O-E system for the observations of spatial target. We also analyze Theoretical elastic deformation of the Steward Observatory 2.3 meter mirror is analyzed.