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	Retrieval of Oil-Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar 期刊论文 OAI收割 REMOTE SENSING, 2019, 卷号: 11, 期号: 7, 页码: 21 作者: Li, Haiyan; Perrie, William; Wu, Jin \| 收藏 \| 浏览/下载：79/0 \| 提交时间：2019/07/08 oil-water mixture ratio compact polarization SAR (CP SAR) hybrid-polarized SAR (HP SAR) oil spill polarization SAR
	Retrieval of Oil-Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar 期刊论文 OAI收割 REMOTE SENSING, 2019, 卷号: 11, 期号: 7, 页码: 21 作者: Li, Haiyan; Perrie, William; Wu, Jin \| 收藏 \| 浏览/下载：57/0 \| 提交时间：2019/09/24 oil-water mixture ratio compact polarization SAR (CP SAR) hybrid-polarized SAR (HP SAR) oil spill polarization SAR
	Estimation of Melt Pond Fractions on First Year Sea Ice Using Compact Polarization SAR 期刊论文 OAI收割 JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2017, 卷号: 122, 期号: 10, 页码: 8145-8166 作者: Li, Haiyan; Perrie, William; Li, Qun; Hou, Yijun \| 收藏 \| 浏览/下载：42/0 \| 提交时间：2019/07/15 compact polarization (CP) SAR melt pond fraction co-pol ratio CP parameter first sea ice FYI "compact polarization and quad-pol" ("CPQP") model
	Estimation of Melt Pond Fractions on First Year Sea Ice Using Compact Polarization SAR 期刊论文 OAI收割 JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2017, 卷号: 122, 期号: 10, 页码: 8145-8166 作者: Li, Haiyan; Perrie, William; Li, Qun; Hou, Yijun \| 收藏 \| 浏览/下载：35/0 \| 提交时间：2018/09/06 Compact Polarization (Cp) Sar Melt Pond Fraction Co-pol Ratio Cp Parameter First Sea Ice Fyi "compact Polarization And Quad-pol" ("cpqp") Model
	Effects of china's urban form on urban air quality 期刊论文 iSwitch采集 Urban studies, 2016, 卷号: 53, 期号: 12, 页码: 2607-2623 作者: Lu, Chen; Liu, Yi 收藏 \| 浏览/下载：66/0 \| 提交时间：2019/05/09 Boyce-clark shape index Compact ratio Fractal dimension Geographically weighted regression analysis Urban air pollution
	Application of precision harmonic gear drive in focusing mechanism of space camera (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China 作者: Zhang X.; Zhang X.; Zhang X. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 A kind of precision harmonic gear drive in the focusing mechanism of space camera is studied which adopt external meshing complex wave transmission mode. Wave generator is combined with an elliptic cam and a flexible bearing around it. Flexspline is a structure of single wave with the same teeth. The output shaft is supported by a single cross-roller bearing. Ball screws connected the output shaft translate the rotational motion to the linear motion and drive the focusing mirror repeated moving along the linear guide. The output rigid wheel is connected with absolute encoder to detect displacement of focusing movement. It has the characteristics of big transmission ratio high precision compact structure high efficiency and smooth running etc. According to the practical application of this harmonic gear drive in the space camera the location relationship between the displacement of focusing structure and the focal plane movement is derived and the system error is analyzed its accuracy is tested with the open-loop control method. Experimental results show that transmission ratio of the instrument is 1:70 repeated positional accuracy is 2m which meet the requirements for use. 2010 SPIE.
	The calibration of faint simulation star magnitude based on single photon count technique (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, June 17, 2009 - June 19, 2009, Beijing, China 作者: Xu S.-Y.; Guo J.; Guo J. 收藏 \| 浏览/下载：33/0 \| 提交时间：2013/03/25 A calibration method of faint star magnitude of the star scene simulation device is proposed in this paper. In the research of simulation star magnitude luminometers and CCD devices are the general calibration devices which are used to measure the illumination intensity and calibrate its magnitude. But if the simulation magnitude is only sixth magnitude its illumination intensity is only 1.010-8 Lux. This illumination intensity level is the lowest illumination intensity that the commercial luminometer can detect. Hence the simulation star magnitude lower than six magnitude cannot be calibrated by luminoters. Likewise CCD devices also need an additive cooler in this case. When the single photon characteristic is presented due to the low luminosity of simulating light sources the simulation star magnitude can be calibrated by detecting its photon flux of radiation with the method of single photon count. In this paper the detection principle of single photon based on a compact designed PMT detecting of the radiation level of simulation star magnitude is advanced. Especially a spectrum match method is proved theoretically to be an effective means for selecting PMT photosensitive type. In the case of the detection object of the simulation star in visible wavelength a analysis indicates that the material of tri-alkali cathode materials its best choice after being compared the Signal-to-Noise of photon detector of several PMT photosensitive materials based on the different spectrum match ratio of different object light sources and different cathode materials. An experiment is employed to show the relationship of control voltage of PMT and its dark counter the relationship of the environment temperature of PMT and its dark counter which proves its only decades of CPS at room temperature. The so low dark counter avoids a bulky cooler and is convenient for installing it on the star scene simulation equipment. Finally in the experiment of calibrating the simulation star magnitudes the ability of its calibration is confirmed to reaches up to 12m meanwhile its calibration error is within 0.2m. 2009 SPIE.
	Analysis on urban expansion and spatial morphology evolution of Nanchang based on GIS and RS in the recent three decades - art. no. 679009 会议论文 OAI收割 Remote Sensing and Gis Data Processing and Applications; and Innovative Multispectral Technology and Applications, Pts 1 and 2, Bellingham Zuo, Lijun; Mu, Fengyun; Zhang, Zengxiang; Dong, Tingting 收藏 \| 浏览/下载：80/0 \| 提交时间：2014/12/07 main build-up area spatial morphology compact ratio shape index fractal Nanchang
	Influence of powder-size matching on the surface quality of ceramic mould shell for investment casting of titanium alloys 期刊论文 OAI收割 International Journal of Materials & Product Technology, 2001, 页码: 793-798 Q. Jia; Y. Y. Cui; R. Yang 收藏 \| 浏览/下载：17/0 \| 提交时间：2012/04/14 compact density viscosity powder-size matching powder/solution ratio mould shell