中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共6条，第1-6条

帮助

条数/页：排序方式：
	An accurate and fast forward model of three-dimensional electromagnetic wave scattering in a layered structure with multilayer rough interfaces 期刊论文 OAI收割 RADIO SCIENCE, 2015, 卷号: 50, 期号: 3, 页码: 6279-6290 作者: Wu, Chao; Zhang, Xiaojuan; Fang, Guangyou; Shi, Jiancheng; Liu, Shiyin 收藏 \| 浏览/下载：19/0 \| 提交时间：2016/04/20 bistatic scattering multilayer rough interfaces remote sensing radiation and propagation scattering mechanism high-order small perturbation method
	Spatiotemporal variability analysis of diffuse radiation in China during 1981-2010 期刊论文 OAI收割 ANNALES GEOPHYSICAE, 2013, 卷号: 31, 期号: 2, 页码: 277-289 作者: Yu, GR; Zhang, L; Zhang, L; Fan, JW; He, HL 收藏 \| 浏览/下载：43/0 \| 提交时间：2013/07/03 Atmospheric composition and structure Transmission and scattering of radiation Meteorology and atmospheric dynamics Radiative processes
	Spatiotemporal variability analysis of diffuse radiation in China during 1981-2010 SCI/SSCI论文 OAI收割 2013 作者: Zhang L.; Zhang L. 收藏 \| 浏览/下载：24/0 \| 提交时间：2014/12/24 Atmospheric composition and structure Transmission and scattering of radiation Meteorology and atmospheric dynamics Radiative processes net ecosystem exchange hourly global radiation solar-radiation atmospheric particles horizontal surface pinatubo eruption aerosols fraction impact productivity
	The research of digltal CR medicine image adapitive enhancement method (EI CONFERENCE) 会议论文 OAI收割 4th International Conference on Mechanical and Electrical Technology, ICMET 2012, July 24, 2012 - July 26, 2012, Kuala Lumpur, Malaysia Ming-Hui Z.; Yao-Yu Z. 收藏 \| 浏览/下载：65/0 \| 提交时间：2013/03/25 Digital CR medicine radiation image is in doctor's favor and has became medicine imaging technology new hot spot because of its high gray contrast powerful computer disposal function little radiation dosage non-film diagnosis different area consultation. But degradation of digital X-ray medical image such as low contrast and blurring during radiographic imaging caused by complexity of body tissue and effects of X-ray scattering and electrical noise etc. can worsen the results of analysis and diagnosis. So it is usually needed that CR medicine image is enhanced to improve its vision quality and easy to doctor's more accurate diagnosis. The general enhancement algorithms over enhancing the contrast and lose image details aiming at the defects an enhancement algorithm for CR image is proposed based on the ratio of deviation to mean of domain. The arithmetic enhance CR image edge details by adjusting factor K based on the ratio of deviation to mean of domain of CR image. Experiment results demonstrate that the algorithm enhances CR image detail and CR image enhanced has good visual effect the adaptive enhancement method is fit for CR medicine image. (2012) Trans Tech Publications Switzerland.
	Design of optical elements for imaging the earth's plasmasphere (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings, September 9, 2007 - September 12, 2007, Beijing, China 作者: Chen B.; Chen B.; Wang X.-K. 收藏 \| 浏览/下载：32/0 \| 提交时间：2013/03/25 Studying the distribution of He+ in Earth's plasmasphere by detecting its resonantly-scattered emission at 304A will record the structure and dynamics of the cold plasma in Earth's plasmasphere on a global scale. EUV imaging systems usually utilizes near normal incidence optics including multilayer mirror and filter. In this paper the space condition of the Earth's plasmasphere to confirm the expected performance of mirror and filter for this task were analyzed and some guidelines for the design of the optical elements were introduced. In order to achieve higher response at 304A and reduce 584A radiation for the optical system a new multilayer coating of Mo/Si with UOx (x=2-3) was developed and it is indicated that promising filter material is Al/C with a nickel mesh. In addition we compute the reflectance of multilayer mirror based on optical constants and the transmission of the filter based on atomic scattering factor. The results show the multilayer mirror has high reflectance of 26.27% at 304 Aand low reflectance of 0.60% at 584A. Finally the conversion efficiency of mirror coupled with filter is 6.88% at 304A and 0.01% at 584 A.
	Interaction of oblique waves with an array of long horizontal circular cylinders 期刊论文 OAI收割 science in china series e-technological sciences, 2007, 卷号: 50, 期号: 4, 页码: 490-509 作者: Shen YongMing; Zheng YongHong; Ng Chiu-On 收藏 \| 浏览/下载：18/0 \| 提交时间：2016/10/27 scattering and radiation water waves analytical technique hydrodynamic characteristics