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	The angular velocity estimation principal of -- filter based on high sampling rate (EI CONFERENCE) 会议论文 OAI收割 2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China 作者: Zhang Y. 收藏 \| 浏览/下载：34/0 \| 提交时间：2013/03/25 In order to get angular velocity of stabilization servo mechanism from angular position sensors -- filter and its angular velocity transfer function were predigested. Combing with optimum parameters -- filter based on high sampling rate was established the effect of and sample rate on filter nature frequency were evaluated. According to the requirements of stabilization platform the principle of steady and transient tracking filter differential were proved. With the hypothesis of constant acceleration the frequency characteristics of angular velocity transfer function were analyzed three-dimensional Kalman filter was simplified and the filter parameters were designed. The results show that when the spectrum of input signal was lower than 6rad/s parameters was 0.02 and sampling period were 0.08ms and 0.1ms respectively the filter can realize differential exactly when the spectrum was 9rad/s the precision was no less than 1.1% the phase leading of angular position was no less than 70 the natural frequency should be higher than the cut-off frequency of stabilization platform was two or three times. In the engineering of electro-optical stabilization servo mechanism -- filter has properties of tracking differential and reached the requirement of platform angular velocity estimation. Also it is one of the effective methods to get angular velocity from angular position sensors. 2011 IEEE.
	Spectroscopy and Energy Transfer in Yb3+ and Tm3+ Co-doped Gd3Ga5O12 Crystal 期刊论文 OAI收割 Chinese Journal of Structural Chemistry, 2010, 卷号: 29, 期号: 3, 页码: 449-458 G. T. Chen, H. Zhou, W. C. Lv, Y. Wang, Z. Y. You, J. F. Li, Z. J. Zhu and C. Tu 收藏 \| 浏览/下载：33/0 \| 提交时间：2012/11/02 Yb3+/Tm3+ co-doped Gd3Ga5O12 crystal Judd-Ofelt (J-O) theory spectrum characteristics energy transfer rare-earth ions judd-ofelt analysis optical characterization absorption intensities spectral properties mu-m laser ho3+ fluorescence garnets
	Preparation and optical spectrum characteristics of BaHfO3 : Ce nano-powder 期刊论文 OAI收割 ACTA METALLURGICA SINICA, 2008, 卷号: 44, 期号: 3, 页码: 381-384 作者: Liu Jing; Ma Weimin; Wen Lei; Li Xikun; Shen Shifei \| 收藏 \| 浏览/下载：30/0 \| 提交时间：2021/02/02 scintillantor BaHfO3 : Ce nano-powder co-deposition optical spectrum characteristics
	Temperature characteristics of high power vertical cavity surface emitting lasers (EI CONFERENCE) 会议论文 OAI收割 Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China 作者: Qin L. 收藏 \| 浏览/下载：32/0 \| 提交时间：2013/03/25 By using oxidation confinement technology high power vertical-cavity surface-emitting lasers are fabricated in experiment. The electrical and optical performance characteristics such as threshold current efficiency emission wavelength and output power are measured under continuous wave (CW) condition at room temperature. The maximum output power is up to watt regime at wavelength of about 980nm. The temperature characteristics of the device are investigated experimentally in detail. The variation in lasing threshold current with temperature is studied. The characteristic temperature T0 of the device is derived and the value is about 211K. Such a high characteristic temperature T0 of threshold current can lead to good temperature sensitivity of the device. At the same time the lasing spectrum characteristics with temperature are also measured. The wavelength shift with temperature is just about 0.06nm/K. From the measured results it is shown that the device can still operate at high temperature condition.