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浏览/检索结果: 共18条,第1-10条 帮助

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无线数传在线石油含水量测定仪 专利  OAI收割
专利类型: 发明, 专利号: CN201210339606.9, 申请日期: 2012-12-19, 公开日期: 2012-12-19
郑大钧; 郑志东; 高育宏
收藏  |  浏览/下载:64/0  |  提交时间:2014/08/04
无线数传在线海水密度盐度计 专利  OAI收割
专利类型: 发明, 专利号: CN201210339522.5, 申请日期: 2012-12-12, 公开日期: 2012-12-12
郑大钧; 郑志东; 高育宏
收藏  |  浏览/下载:38/0  |  提交时间:2014/08/04
光纤时间传递延迟补偿实验进展 会议论文  OAI收割
第二届中国卫星导航学术年会, 中国上海, 2011
陈法喜; 梁双有; 赵侃; 李孝峰; 张首刚
收藏  |  浏览/下载:37/0  |  提交时间:2012/10/19
Energy transfer in Y3Al5O12:Ce 3, Pr3+ and CaMoO4:Sm3, Eu 3 phosphors (EI CONFERENCE) 会议论文  OAI收割
作者:  
Wang L.;  Wang X.-J.;  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:41/0  |  提交时间:2013/03/25
Non-radiative energy transfers (ET) from Ce3 to Pr3+ in Y3Al5O12:Ce3  Pr3+ and from Sm3 to Eu3 in CaMoO4:Sm3  Eu3 are studied based on photoluminescence spectroscopy and fluorescence decay patterns. The result indicates an electric dipoledipole interaction that governs ET in the LED phosphors. For Ce3 concentration of 0.01 in YAG:Ce3  Pr3+  the rate constant and critical distance are evaluated to be 4.510-36 cm 6 s-1 and 0.81 nm  respectively. An increase in the red emission line of Pr3+ relative to the yellow emission band of Ce 3  on increasing Ce3 concentration is observed. This behavior is attributed to the increase of spectral overlap integrals between Ce3 emission and Pr3+ excitation due to the fact that the yellow band shifts to the red spectral side with increasing Ce3 concentration. In CaMoO4:Sm3  Eu3  Sm 3Eu3 transfer occurs from 4G5/2 of Sm3 to 5D0 of Eu3. The rate constant of 8.510-40 cm6 s-1 and the critical transfer distance of 0.89 nm are evaluated. 2010 Elsevier B.V. All rights reserved.  
Slip motor speed control system based on LPC2136 and low cost CMOS camera (EI CONFERENCE) 会议论文  OAI收割
2010 IEEE International Conference on Advanced Computer Control, ICACC 2010, March 27, 2010 - March 29, 2010, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States
作者:  
Yang S.-W.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
利用GPS资料解算地球自转参数 会议论文  OAI收割
2009全国时间频率学术会议, 中国四川成都, 2009-10-22
何战科; 杨旭海; 李志刚; 程宗颐
收藏  |  浏览/下载:21/0  |  提交时间:2012/10/19
地球自转参数  GPS  GAMIT/GLOBK|Abstract  与IERS C04比较  本文选取速率稳定  极移在X方向差值小于±0.025 mas  分布好  其RMS为0.0203 mas  资料稳定的ITRF2005框架下的IGS跟踪站(IGS05)的观测资料  极移在Y方向差值小于±0.025 mas  用GAMIT/GLOBK软件  其RMS为0.0354mas  每24小时的数据以12小时步长"滚动"  UT1-UTC差值小于±5μs  估计了UTC 12时和UTC 0时的地球自转参数  其RMS为0.0016ms。其差别均在IERS精度范围之内。  经参数转换后  分别与IGS(UTC 12时)和IERS C04(UTC 0时)同时刻的值进行比较。结果表明  与IGS EOP比较  极移在X方向差值小于±0.05 mas  其RMS为0.0214 mas  极移在Y方向小于±0.04 mas  其RMS为0.0662 mas  UT1-UTC差值小于±0.07 ms  其RMS为0.0260 ms  
Optimizing control mode of optical payloads based on multi-population genetic algorithm (EI CONFERENCE) 会议论文  OAI收割
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
Xu W.; Jin G.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
Optimizing the control mode of optical payload could improve the payload's work efficiency. When the mathematic model of payload's control mode was established  optimization problems could be boiled down to seek the maximal value of the function with many variables. This paper put forward a calculational method to base the mathematic model  the calculational method was multi-population genetic algorithm (MPGA). After the 0-1 variables and real multidimensional ones had been coded separately  the algorithm established the populations independently  made the multidimensional variables as the centrosome and combined 0-1 ones to work out the maximal value of the function which was established to describe the control mode of the optical payload. Moreover  the emulational experiment had been done with the material arithmetic operators. The result indicates that the method using MPGA can hurdle the disadvantage of traditional ones which calculate slowly and get into local best value trap easily . It has the characters that not only fits large scale area scout  but also gets the best value in full scale rapidly  so this algorithm can better satisfy the technology demand for the intelligent control of optical payload. 2009 IEEE.  
Mechanisms of energy transfer in Pr3+ and Cr3+ codoped SrAl12O19 phosphor (EI CONFERENCE) 会议论文  OAI收割
209th ECS Meeting, May 7, 2006 - May 12, 2006, Denver, CO, United states
作者:  
Zhang J.;  Wang X.-J.;  Zhang G.;  Zhang G.;  Zhang G.
收藏  |  浏览/下载:31/0  |  提交时间:2013/03/25