中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共9条，第1-9条

帮助

条数/页：排序方式：
	Linear-FM random radar waveform compressed by dechirping method 期刊论文 OAI收割 IET RADAR SONAR AND NAVIGATION, 2019, 卷号: 13, 期号: 7, 页码: 1107-115 作者: Liu, Jiafang; Zhang, Yunhua; Dong, Xiao \| 收藏 \| 浏览/下载：52/0 \| 提交时间：2019/08/26 radar resolution FM radar random noise radar imaging frequency modulation synthetic aperture radar radar detection jamming dechirping compression method digital radio frequency memory repeat jammer random noise waveforms random radar echo signal low-speed analogue-to-digital converter LFM waveform compression high-resolution circular synthetic aperture radar imaging experiment linear-FM random radar waveform linear frequency modulation random radar waveform
	Performance Analysis of Circular Antenna Array for Microwave Interferometric Radiometers 期刊论文 OAI收割 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2017, 卷号: 55, 期号: 6, 页码: 3261-3271 作者: Wu, Ji; Zhang, Cheng; Liu, Hao; Yan, Jingye 收藏 \| 浏览/下载：34/0 \| 提交时间：2017/09/14 Antenna arrays circular arrays microwave radiometry synthetic aperture imaging
	Microwave Interferometric Radiometer with Uniform Circular Antenna Array 会议论文 OAI收割 36th IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Beijing, PEOPLES R CHINA, JUL 10-15, 2016 作者: Wu, Ji; Zhang, Cheng; Liu, Hao; Yan, Jingye 收藏 \| 浏览/下载：33/0 \| 提交时间：2017/04/07 Microwave radiometry synthetic aperture imaging antenna arrays circular arrays
	Imaging Analysis and First Results of the Geostationary Interferometric Microwave Sounder Demonstrator 期刊论文 OAI收割 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2015, 卷号: 53, 期号: 1, 页码: 207-218 作者: Zhang, Cheng; Liu, Hao; Wu, Ji; Zhang, Shengwei; Yan, Jingye 收藏 \| 浏览/下载：27/0 \| 提交时间：2015/09/28 Circular array geostationary earth orbit (GEO) millimeter-wave sounder rotating scan synthetic aperture
	DESIGN OF X degrees ROTATING-SCANNING CIRCULAR ANTENNA ARRAY FOR SYNTHETIC APERTURE RADIOMETER 会议论文 OAI收割 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Quebec, CANADA, JUL 13-18, 2014 作者: Sun, Weiying; Liu, Hao; Zhang, Cheng; Wu, Ji 收藏 \| 浏览/下载：37/0 \| 提交时间：2015/09/18 synthetic aperture radiometer rotating-scanning circular antenna array design
	Terahertz FSS for space borne passive remote sensing application 期刊论文 OAI收割 ELECTRONICS LETTERS, 2013, 卷号: 49, 期号: 22, 页码: 1398-1399 作者: Xia, Bu Gang; Zhang, De Hai; Meng, Jin; Huang, Jian; Yao, Chang Fei 收藏 \| 浏览/下载：50/0 \| 提交时间：2014/05/04 aerospace instrumentation antenna arrays circular waveguides electromagnetic wave polarisation frequency selective surfaces geophysical equipment radiometers receiving antennas remote sensing resonators spatial filters submillimetre wave devices terahertz wave devices terahertz metamaterials frequency 0 1 THz to 0 5 THz Earth observation radiometers space-borne passive remote sensing application scanning antenna split ring resonator subwavelength circular ring micromachined metallic pattern periodic aperture unit cells ultra-thin high conductivity aluminium layer quartz wafer FSS array incident angle variation polarisation variation high sensitivity receiver spatial filtering front-end terahertz FSS metamaterial terahertz frequency selective surface
	Vectorial structure of a hard-edged-diffracted four-petal Gaussian beam in the far field 期刊论文 OAI收割 optics communications, 2010, 卷号: 283, 期号: 23, 页码: 4586-4593 作者: Long, Xuewen; Lu, Keqing; Zhang, Yuhong; Guo, Jianbang; Li, Kehao 收藏 \| 浏览/下载：263/37 \| 提交时间：2011/07/08 Four-petal Gaussian beam Vectorial structure Circular aperture Far field
	Anomalous spectral behavior of vectorial apertured ultrashort pulsed beams beyond the paraxial approximation 期刊论文 OAI收割 optics communications, 2008, 卷号: 281, 期号: 4, 页码: 521-526 作者: Yang, Yuanjle; Duan, Kailiang; Li, Yude 收藏 \| 浏览/下载：23/0 \| 提交时间：2011/09/30 vectorial nonparaxial ultrashort pulse spectral switch circular aperture vector Rayleigh diffraction integrals f-parameter
	Recent progress on asphere manufacturing and testing at CIOM (EI CONFERENCE) 会议论文 OAI收割 Advanced Optical Manufacturing and Testing Technology 2000, November 1, 2000 - November 3, 2000, Chengdu, China 作者: Zhang X.; Yu J.; Zhang X.; Zhang X. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 The manufacturing procedure of a 500 mm in diameter f/2 hyperbolic primary mirror based on Computer-Controlled Polishing is introduced in detail. The mirror was finally polished to the shape accuracy of 13 nm rms and the surface roughness of 2 nm Ra. Testing methods and data analysis for different stages ranging from grinding to polishing are discussed. Some critical factors affecting the efficiency and accuracy of the grinding/polishing procedure are summarized. In addition the preliminary work to make large off-axis asphere mirrors is presented. The difficulties in polishing and testing for both circular aperture and rectangular aperture mirrors are previewed and a possible solution is given. To control the geometrical parameters such as radius of curvature and conic constant a new profiler has been built and it has proven very useful to improve the grinding efficiency. Finally the manufacturing of small aspheres using deterministic grinding tool is also introduced. The fine grinding procedure of LOH's asphere grinding machine is presented.