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长春光学精密机械与物... [6]
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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
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浏览/下载:64/0
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提交时间:2014/08/04
一种无线数传在线石油含水量测定仪
其特征在于:包括机壳及位于其内的硬件电路
所述硬件电路包括处理模块
应变传感器及与之相连的无线数传模块
所述应变传感器的应变梁上安装有伸出机壳的吊钩
所述应变传感器测量吊钩上被悬挂物的拉力后通过处理模块处理
所述处理模块将接收的拉力通过公式S=|(PX?P0)|k1*k2输出石油含水量
其中
S为石油的含水量
PX?为所述探头体积所占的含水石油的重量
P0?为所述探头体积所占的纯石油的重量
k1为石油的含水量修正值
k2为单位换算比值常数。
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
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  |  
浏览/下载:38/0
  |  
提交时间:2014/08/04
一种无线数传在线海水密度盐度计
其特征在于:包括机壳及位于其内的硬件电路
所述硬件电路包括处理模块
应变传感器及与之相连的无线数传模块
所述应变传感器的应变梁上安装有伸出机壳的吊钩
所述应变传感器测量吊钩上被悬挂物的拉力或通过处理模块处理
所述处理模块用以将接收的拉力通过公式S=|(PX?P0)|k1*k2输出海水盐度
其中
S为被测海水的盐度
PX?为探头体积所占的海水重量
P0为探头体积所占的净水的重量
k1是海水密度盐度修正值
k2是单位转换比例常数。
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
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浏览/下载:37/0
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提交时间:2012/10/19
光纤时间传输
延迟补偿
温度漂移
频率稳定度|Abstract
其次
再次
本文介绍了国家授时中心光纤时间频率传递研究的新进展。近年来
进行了实际光纤链路7.2 km传输延迟的补偿实验
在温度一2 0℃~+60℃变化情况下
国家授时中心在此方面
补偿精度为25.2ps
进行50km光纤时间延迟温度漂移实验
进行了多项实验
频率稳定度达到4.7 5×1 0~(-15)/10~4 s
补偿后150ns的漂移被消除
取得了很大的进展。首先
精度为0.3ns。
进行了实验室100km光纤闭环传输延迟的初步补偿实验
补偿后时延被完全消除
精度为0.2 7ns(1σ)
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.
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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.
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浏览/下载:23/0
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提交时间:2013/03/25
In this paper
Slip motor speed is in the precision of 1 percent in scope of 0 to 1400rpm. Practical application shows that the system is reliable
designed the slip motor speed control system for packing rubber strip which is used in plastic steel door and window. The system
stable and higher precision of control. The system design provides reference for similar control system and builds the basis for the design of intelligent control system. 2010 IEEE.
32-bit embedded microprocessor LPC2136 as the control core
PWM speed control
velocity feedback from tachogenerator
rubber strip position feedback from the CMOS camera
has proved that CMOS camera's image quality meets the engineering requirement
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
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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.
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浏览/下载:30/0
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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.
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浏览/下载:31/0
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提交时间:2013/03/25
A two-step energy transfer was observed in Pr3+ and Cr 3+ codoped SrAl12O19 phosphor
which results in a two-photon luminescence for one UV/vacuum-UV photon absorbed. For one Pr 3+ ion excited to the lowest 4f5d states
two Cr3+ ions may be excited and emit two red photons due to 2E- 4A2 transitions of the Cr3+ ions
Cr 3+ ions can be excited into the 4T1(F) levels by cross relaxation of Pr3+ 1S0- 1I6 or by direct energy transfer from Pr3+ 3P0
1 states. The mechanisms of the two-step energy transfer process were studied based on spectra and lifetime measurements. copyright The Electrochemical Society.