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浏览/检索结果: 共3条，第1-3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 中国气候与环境演变评估(Ⅱ):气候与环境变化的影响与适应、减缓对策 期刊论文 2010, 2010 陈宜瑜; 丁永建; 佘之祥; 林而达; 潘家华; 周广胜; 王守荣; 周大地; 李从先; 张建云; 徐国弟; 刘春蓁; 吴宗鑫; CHEN Yiyu; DING Yongjian; SHE Zhixiang; LIN Erda; PAN Jiahua; ZHOU Guangsheng; WANG Shourong; ZHOU Dadi; LI Congxian; ZHANG Jianyun; XU Guodi; LIU Chunzhen; WU Zongxin 收藏  |  浏览/下载：3/0 Athermalization of coaxial reflective space telescope (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 Lei Z.; Guang J. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 This paper focuses on thermal effects  which caused by environmental temperature changes  on coaxial reflective space telescope and its solution. Curvature radius and center thickness of optical elements  and the space distance between optical elements may be changed by thermal effects. And the optical performance of the telescope may be impacted. Based on the analysis of thermal effects on coaxial reflective space telescope  athermalized design techniques are emphatically presented  the advantages and the disadvantages of the three athermalizations used currently are compared in the paper. The feasibility and effectiveness are verified by an example of a cassegrain space telescope. 2010 Copyright SPIE - The International Society for Optical Engineering.   论省市共建“以省为主”和“以市为主”之利弊----新建地方本科院校管理体制改革研究 学位论文 2010, 2009 黄海群 收藏  |  浏览/下载：1/0  |  提交时间：2016/02/14 newly-upgraded local universities  management system  advantages and disadvantages  新建地方本科院校  管理体制  利弊