机构

• 长春光学精密机械与物... [2]
• 中国科学院大学 [2]
• 国家授时中心 [2]
• 地理科学与资源研究所 [1]

采集方式

• OAI收割 [5]
• iSwitch采集 [2]

内容类型

• 期刊论文 [4]
• 会议论文 [2]
• SCI/SSCI论文 [1]

发表日期

• 2020 [2]
• 2016 [1]
• 2010 [2]
• 2009 [1]
• 2007 [1]

学科主题

筛选

浏览/检索结果: 共7条，第1-7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 北斗三号卫星共视时间比对性能分析 期刊论文  OAI收割 宇航学报, 2020, 卷号: 41, 期号: 5, 页码: 569 作者:  王威雄;  董绍武;  武文俊;  王翔;  郭栋   |  收藏  |  浏览/下载：30/0  |  提交时间：2020/09/01 BDS-3 satellite  International time comparison  Vondrak filter  北斗三号  国际时间比对  Vondrak滤波   gps多接收机组合的共视时间比对技术研究 期刊论文  OAI收割 宇航计测技术, 2020, 卷号: 40, 期号: 1, 页码: 38 作者:  张健;  董绍武;  武文俊;  王威雄;  郭栋   |  收藏  |  浏览/下载：13/0  |  提交时间：2020/09/02 GPS Common View (CV)  Time service center  Multi-receiver system  International time comparison  GPS  共视  时间基准  多接收机系统  时间比对   Modelling the basic research competitiveness index (br-ci) with an application to the biomass energy field 期刊论文  iSwitch采集 Scientometrics, 2016, 卷号: 108, 期号: 3, 页码: 1221-1241 作者:  Zhang, Yi;  Kou, Mingting;  Chen, Kaihua;  Guan, Jiancheng;  Li, Yuchen 收藏  |  浏览/下载：47/0  |  提交时间：2019/05/09 Basic research performance  International comparison  Basic research competitiveness index  Modelling and empirical study  Biomass energy field   Combination of skip-flat test with Ritchey-Common test for the large rectangular flat (EI CONFERENCE) 会议论文  OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China 作者:  Zhang L.;  Xuan B.;  Zhang L. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 The Skip-Flat test and Ritchey-Common test are the well-known methods for large flat mirrors measurement. This paper describes the theories of two methods. The combination of the Skip-Flat test with Ritchey-Common test is proposed. Simulations and experiments of the combination method for testing the large rectangular flat of high aspect ratio are shown. The results of the combination test and direct measurement are presented. In comparison of the methods  the combination test is in good agreement with the direct measurement. 2010 Copyright SPIE - The International Society for Optical Engineering.   Experiments of second harmonic generation output in pulsed TEA CO 2 laser (EI CONFERENCE) 会议论文  OAI收割 High-Power Lasers and Applications V, October 18, 2010 - October 19, 2010, Beijing, China 作者:  Li D. 收藏  |  浏览/下载：52/0  |  提交时间：2013/03/25 It is always the hot subject to realize the output of high-power laser in the range of 3-5m wavelength. This rang of wave band has greatly important applications in military because it located in the atmosphere window. Generally there are two ways to obtain this range of laser wavelength. One way is through optical parameter oscillation (OPO) from shorter laser wavelength and the other is through second harmonic generation (SHG) from longer laser wavelength. Firstly  the comparison between tow nonlinear crystals ZnGeP2 and AgGaSe2 is conducted for their nonlinear coefficient and damaging threshold in theory. The theoretical results show that the crystal AgGaSe 2 is more suitable for the SHG of pulsed TEA CO2 laser. When using pulsed TEA CO2 laser with wavelength of 9.3m to pumping AgGaSe2 SHG crystal  the wavelength of 4.65m is obtained. In the condition of repetition rate 100Hz  the upmost output power of single pulse is up to level of 1W  which corresponding efficiency of SHG is about 6%. The experimental results show that the polarization of laser beam has greatly influence on the SHG output of the crystal. Under the radiation of 3MW/cm 2 from fundamental wave and the right position for maximal SHG output in the crystal  when polarization of laser beam rotates 4.5  the SHG output of energy decrease about 30%. The research of this paper will make a foundation for further development of mid-infrared laser. 2010 Copyright SPIE - The International Society for Optical Engineering.   A Comparative Study of International Insurance Markets SCI/SSCI论文  OAI收割 2009 Zheng W.; Liu Y. D.; Deng Y. T. 收藏  |  浏览/下载：31/0  |  提交时间：2012/06/08 insurance industry  growth level  international comparison  countries  growth   Managing expected return of investors: convertible bonds in china 期刊论文  iSwitch采集 International journal of information technology & decision making, 2007, 卷号: 6, 期号: 1, 页码: 141-161 作者:  Yang, Ruyan;  Meng, Hui;  Xu, Feng 收藏  |  浏览/下载：25/0  |  提交时间：2019/05/10 Management of expected return  Convertible bonds  International comparison