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Particle swarm Optimized Density-based Clustering and Classification: Supervised and unsupervised learning approaches 期刊论文
Swarm and Evolutionary Computation, 2019, 卷号: 44, 页码: 876-896
作者:  Guan, Chun;  Yuen, Kevin Kam Fung;  Coenen, Frans
收藏  |  浏览/下载：15/0  |  提交时间：2019/11/19
Measuring spatial differences of informatization in China 期刊论文
CHINESE GEOGRAPHICAL SCIENCE, 2014, 卷号: 24, 期号: 6, 页码: 717-731
作者:  Song Zhouying;  Liu Weidong;  Ma Li;  Dunford, Michael
收藏  |  浏览/下载：12/0  |  提交时间：2019/09/26
Public participatory risk mapping for community-based urban disaster mitigation 会议论文
2013 International Conference on Vehicle and Mechanical Engineering and Information Technology, VMEIT 2013, Zhengzhou, Henan, China, August 17, 2013 - August 18, 2013
作者:  Jing, Li;  Liu, Xue Mei;  Gang, Liu
收藏  |  浏览/下载：5/0  |  提交时间：2017/01/18
Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Yu L.; Wang S.-R.; Lin G.-Y.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding  the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror  a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror  coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected  and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system  a deuterium lamp  a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.  
Spatial morphology evolution and formative mechanism of the southern town groups in Huangshan City, China based on remote sensing 会议论文
2010 18th International Conference on Geoinformatics, Geoinformatics 2010, Beijing, China, June 18, 2010 - June 20, 2010
作者:  Xia, Yongjiu;  Zhu, Xigang;  Wei, Boxian;  Chen, Xingpeng
收藏  |  浏览/下载：3/0  |  提交时间：2017/01/18
ECT flow regime identification technology based on 2­D Maximum Entropy Threshold Image Segmentation with Chaos­Particle Swarm optimization algorithm 会议论文
作者:  Luo, Zhengyuan;  Hu, Hongli;  Xu, Tongmo;  Tan, Houzhang
收藏  |  浏览/下载：9/0  |  提交时间：2019/12/10
Response of glacier and lake covariations to climate change in Mapam Yumco basin on Tibetan plateau during 1974-2003 SCI/SSCI论文
2008
作者:  Wang Y.
收藏  |  浏览/下载：17/0  |  提交时间：2012/06/08
Study on land use and land cover change with the integration of RS, GIS and GPS technologies-the case of baotou city in the ecotone of agriculture-animal husbandry, China 会议论文
2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings, Boston, MA, United states, July 6, 2008 - July 11, 2008
作者:  Cheng, Yu;  Nie, Junsheng;  Li, Gang;  Zhang, Chunhui;  Wang, Wenrui,
收藏  |  浏览/下载：3/0  |  提交时间：2017/01/18
Super-resolved imaging system with oversampling technology (EI CONFERENCE) 会议论文
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
Zhang X.; Liu Y.; Zhang J.-P.; Wang L.-J.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
It has been a significant issue in the imaging filed to provide the highest possible resolution of an electro-optical imaging system(E-O imaging system). CCD arrays are inherently undersampled and spatial frequency above Nyquist frequency is distorted so as to create ambiguity and Moire patterns for targets imaged by E-O system.. As to this drawback  a system-design project is introduced and discussed in the paper. It's well known that many image quality metrics are linked to MTF. However  CCDs don't satisfy MTF condition  namely  the shift-invariant property  so MTF synthesis can't appraise the whole system simply by the MTF product of the few sub-system ones in E-O imaging system. Then it is depicted how to solve this problem in the following. Finally the analyses and comparisons of the imaging performance parameters with and without super-resolved technologies are shown.  
Mobile geoinformation services - Concept, reality & problems 会议论文
作者:  Huang, JN;  Zhang, JT;  Xie, ZY;  Li, QQ
收藏  |  浏览/下载：2/0  |  提交时间：2019/12/05

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