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	Black Locust Transpiration Responses to Soil Water Availability as Affected by Meteorological Factors and Soil Texture 期刊论文 OAI收割 PEDOSPHERE, 2015, 卷号: 25, 期号: 1, 页码: 57-71 作者: Wu Yuan-Zhi; Huang Ming-Bin; Warrington, David N. 收藏 \| 浏览/下载：27/0 \| 提交时间：2016/01/19 dry soil layer evaporative demand loamy clay Loess Plateau reference evapotranspiration sandy loam temperature vapor pressure deficit
	Research on model reference sliding mode control in roll stabilization of aerocraft (EI CONFERENCE) 会议论文 OAI收割 2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China Chu H.-R. 收藏 \| 浏览/下载：40/0 \| 提交时间：2013/03/25 Aimed at aerospace roll stabilization control arithmetic based on model reference sliding mode variable structure theory and chattering reduction arithmetic are formulated. Correctness and validity of arithmetic are analyzed. With flight dynamics the roll-loop mathematic model and reference model are established. Sliding hyperplane is deduced based on model reference sliding mode variable structure theory. Combing with reaching law control law is derived and stability of roll-loop is analyzed. Chattering of aileron instructions is alleviate by using boundary layer approach. Digital flying simulation result shows that variable structure control arithmetic realized roll stabilization control the roll angle is less than 5.3 under powered flight and that of unpowered flight is less than 0.5 respectively. The command fin angle is less than 1.5. High frequency chattering of fin command nearby the minimum velocity was trailed off by chattering reduction arithmetic. The sliding mode control arithmetic show good performance when aerodynamic coefficients varies 20%. The control arithmetic is easy to be implemented for its simplicity. 2011 IEEE.
	Influence of spatial temperature distribution on high accuracy interferometric metrology (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: Yang H.; Zhang J.; Zhang J.; Zhang J.; Yan F. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 We calculate the influence of temperature change on the refractive index of air establish a model of air temperature distribution and analyze the effect of different temperature distribution on the high accuracy interferometric metrology. First a revised Edlen formula is employed to acquire the relation between temperature and refractive index of air followed by introducing the fixed temperature gradient distribution among the spatial grid within the optical cavity between the reference flat and the test flat of the Fizeau interferometer accompanied by a temperature change random function within each grid. Finally all the rays through the air layer with different incident angles are traced by Matlab program in order to obtain the final output position angle and OPD for each ray. The influence of different temperature distribution and the length of the optical cavity in on the testing accuracy can be analyzed through the RMS value that results from repeatable rays tracing. As a result the horizontal distribution (vertical to optical axis) has a large effect on the testing accuracy. Thus to realize the high accuracy figure metrology the horizontal distribution of temperature must be rigorously controlled as well as to shorten the length of the optical cavity to a large extent. The results from our simulation are of great significant for the accuracy analysis of interferometric testing and the research of manufacturing a interferometer. 2010 Copyright SPIE - The International Society for Optical Engineering.
	Color image quality assessment based on quaternion singular value decomposition (EI CONFERENCE) 会议论文 OAI收割 1st International Congress on Image and Signal Processing, CISP 2008, May 27, 2008 - May 30, 2008, Sanya, Hainan, China 作者: Liu W.; Wang Y.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：19/0 \| 提交时间：2013/03/25 An effective assessment method for color image is proposed. It is based on the quaternion description for the structural information of color image. The local variance of the luminance layer of color image is taken as the real part of a quaternion then the three RGB channels of the color image are encoded into the three imaginary parts of the quaternion. The angle between the singular value feature vectors of the quaternion matrices correspond to the reference image and the distorted image is used to measure the structural similarity of the two images. Results from experiments show that the proposed method is better consistent with the human visual characteristics than MSE PSNR and SSIM. The images whose size is different from that of the reference image can also be assessed by this method. 2008 IEEE.
	4H-SiC基底Al_2O_3/SiO_2双层减反射膜的设计和制备期刊论文 OAI收割光学学报, 2008, 卷号: 28, 期号: 12, 页码: 2431, 2435 黄火林; 张峰; 吴正云; 齐红基; 姚建可; 范正修; 邵建达收藏 \| 浏览/下载：1196/189 \| 提交时间：2009/09/22 薄膜光学 Al2O3/SiO2双层减反射膜电子束蒸发 4H-SiC基底折射率 4H-SiC substrate Al2O3/SiO2 double-layer anti-reflection coatings Deposited layers Electron beam evaporation Layer coatings Layer thicknesses Physical thicknesses Reference wavelengths Reflection spectrums Scanning electron microscopes SEM images Single layers Thin film optics UV optoelectronic devices Wavelength selectivities
	Chernobyl nuclear accident revealed from the 7010 m Muztagata ice core record 期刊论文 OAI收割 CHINESE SCIENCE BULLETIN, 2007, 卷号: 52, 期号: 10, 页码: 1436-1439 作者: Tian LD(田立德); Yao TD(姚檀栋); Wu GJ(邬光剑) 收藏 \| 浏览/下载：18/0 \| 提交时间：2010/05/24 Muztagata ice core reference layer total activity Chernobyl nuclear accident
	The low latitude ionospheric effects of the April 2000 magnetic storm near the longitude 120 degrees E 期刊论文 OAI收割 EARTH PLANETS AND SPACE, 2004, 卷号: 56, 期号: 6, 页码: 607-612 作者: Liu, LB; Wan, WX; Lee, CC; Ning, BQ; Liu, JY \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2018/09/26 geomagnetic storm ionospheric storm F-layer low latitude perturbed electric field International Reference Ionosphere
	The low latitude ionospheric effects of the April 2000 magnetic storm near the longitude 120 degrees E 期刊论文 OAI收割 EARTH PLANETS AND SPACE, 2004, 卷号: 56, 期号: 6, 页码: 607-612 作者: Liu, LB; Wan, WX; Lee, CC; Ning, BQ; Liu, JY \| 收藏 \| 浏览/下载：12/0 \| 提交时间：2018/09/26 geomagnetic storm ionospheric storm F-layer low latitude perturbed electric field International Reference Ionosphere