机构

• 地理科学与资源研究所 [3]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [4]

内容类型

• SCI/SSCI论文 [3]
• 会议论文 [1]

发表日期

• 2016 [1]
• 2010 [2]
• 2007 [1]

学科主题

筛选

浏览/检索结果: 共4条，第1-4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 Warm season heavy rainfall events over the Huaihe River Valley and their linkage with wintertime thermal condition of the tropical oceans SCI/SSCI论文  OAI收割 2016 作者:  Li L. F.;  Li, W. H.;  Tang, Q. H.;  Zhang, P. F.;  Liu, Y. M.   |  收藏  |  浏览/下载：31/0  |  提交时间：2017/11/09 Heavy rainfall events  Seasonal climate prediction  Bayesian inference  on precipitation  Huaihe River Valley  Normal mixture model  Support  vector machine  asian summer monsoon  surface-temperature  western pacific  climate  variability  daily precipitation  eastern china  late 1970s  impacts  teleconnection  circulation   Determining factors in potential evapotranspiration changes over China in the period 1971-2008 SCI/SSCI论文  OAI收割 2010 Yin Y. H.; Wu S. H.; Dai E. F. 收藏  |  浏览/下载：44/0  |  提交时间：2012/06/08 potential evapotranspiration  climate change  sensitivity analysis  determining factor  radiation  wind speed  pan evaporation trends  penman-monteith  sensitivity-analysis  united-states  radiation  cloudiness  variables  1970s  model  india   Trend in pan evaporation and its attribution over the past 50 years in China SCI/SSCI论文  OAI收割 2010 Liu M.; Shen Y. J.; Zeng Y.; Liu C. M. 收藏  |  浏览/下载：22/0  |  提交时间：2012/06/08 pan evaporation  Mann-Kendall test  diurnal temperature range  wind  speed  compete correlation  China  1970s   Application of CMOS APS star tracker with large FOV in attitude and angular velocity determination (EI CONFERENCE) 会议论文  OAI收割 Advanced Sensor Systems and Applications III, November 12, 2007 - November 14, 2007, Beijing, China Lu D.; Guang J.; Shaoju W.; Tao C. 收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25 The paper deals with the spacecraft attitude determination problem using a new kind of star tracker with large FOV based on CMOS APS. Star tracker has been developed since 1970s and proved to be the most accurate sensor ever used in the spacecraft attitude determination systems. But the traditional CCD star tracker also has some disadvantages  such as small FOV  high power consumption  low sample rate and low working angular rate limit which prevent the use of CCD star tracker in attitude large angle maneuvering process. The new kind of star tracker based on CMOS APS has no such disadvantages and is more applicable on modern low-cost agile small satellites. Its higher sample rate and working angular rate limit over traditional CCD star tracker make it more adapt for spacecraft angular velocity determination. Because of the large FOV of the star tracker  the mathematical model of traditional CCD star tracker with a small FOV is not appropriate. So a new mathematical model was quoted to fit the star tracker with a large FOV. An alternative adaptive algorithm was also introduced in the paper. It can help the EKF algorithm work lacking of accurate covariance of the observation noise. An optimal estimation algorithm was used to estimate the angular velocity directly from the star tracker measurements. Mathematic simulation results indicate the CMOS APS star tracker can give accurate attitude information and estimated angular rate. The method can be used as the chief attitude determination system design of low-cost satellite without gyros  or be used as a backup strategy in the event of gyro failures to enhance the reliability of the attitude determination system.