中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共7条，第1-7条

帮助

条数/页：排序方式：
	Experimental Study on Bottom-Up Detection of Underwater Targets Based on Polarization Imaging 期刊论文 OAI收割 SENSORS, 2022, 卷号: 22, 期号: 8 作者: Pan, Tianfeng; He, Xianqiang; Zhang, Xuan; Liu, Jia; Bai, Yan \| 收藏 \| 浏览/下载：66/0 \| 提交时间：2022/05/07 underwater polarization imaging targets polarization parameters bottom-up observation angle of polarization (AOP)
	The gold nanoparticle springs' spectrum modulation 期刊论文 OAI收割 MATERIALS RESEARCH EXPRESS, 2018, 卷号: 5, 期号: 11, 页码: 10 作者: Wang, Zhenyu; Ouyang, Xinrong; Liu, Jing; Xiong, Bin; Wen, Xiaodong \| 收藏 \| 浏览/下载：198/0 \| 提交时间：2019/05/23 gold nanoparticles spring spectrum modulation LSPR large angle laser irradiation dark field observation
	Impact of observation angle and radiance on LWIR polarimetric images 会议论文 OAI收割 Changchun, China, July 25-27, 2018 作者: Liu HZ(刘海峥); Shi ZL(史泽林); Feng B(冯斌); Zhao YH(赵耀宏) \| 收藏 \| 浏览/下载：69/0 \| 提交时间：2019/01/13 Infrared Polarization Imaging Observation Angle Dolp Scr
	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：72/0 \| 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
	Modeling of satellite borne TDI CCD pitching imaging image motion velocity vector (EI CONFERENCE) 会议论文 OAI收割 2009 IEEE International Conference on Automation and Logistics, ICAL 2009, August 5, 2009 - August 7, 2009, Shenyang, China 作者: Zhang L.; Li S.; Zhang L. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 In order to obtain three-dimensional observation effect with single satellite borne time delay and integrate charge coupled device (TDI-CCD) pitching imaging is required. More accurate real-time image motion velocity vector computational model of space camera is also necessary to make the imaging perfect. Imaging motion velocity vector computation model must be set up on image plane at pitching imaging. According to the geometric relationship between the pitching imaging space camera and the Earth's rotation motion satellite borne TDI CCD pitching imaging motion velocity vector model is derived by mapping the ground speed to the image plane and using coordinate transformation method. The numerical simulation results show that the image velocity model can reduce deviation angle error about 33' and about 30% image motion speed error compared to traditional ground velocity model. 2009 IEEE.
	Application of CMOS APS star tracker with large FOV in attitude and angular velocity determination (EI CONFERENCE) 会议论文 OAI收割 Advanced Sensor Systems and Applications III, November 12, 2007 - November 14, 2007, Beijing, China Lu D.; Guang J.; Shaoju W.; Tao C. 收藏 \| 浏览/下载：44/0 \| 提交时间：2013/03/25 The paper deals with the spacecraft attitude determination problem using a new kind of star tracker with large FOV based on CMOS APS. Star tracker has been developed since 1970s and proved to be the most accurate sensor ever used in the spacecraft attitude determination systems. But the traditional CCD star tracker also has some disadvantages such as small FOV high power consumption low sample rate and low working angular rate limit which prevent the use of CCD star tracker in attitude large angle maneuvering process. The new kind of star tracker based on CMOS APS has no such disadvantages and is more applicable on modern low-cost agile small satellites. Its higher sample rate and working angular rate limit over traditional CCD star tracker make it more adapt for spacecraft angular velocity determination. Because of the large FOV of the star tracker the mathematical model of traditional CCD star tracker with a small FOV is not appropriate. So a new mathematical model was quoted to fit the star tracker with a large FOV. An alternative adaptive algorithm was also introduced in the paper. It can help the EKF algorithm work lacking of accurate covariance of the observation noise. An optimal estimation algorithm was used to estimate the angular velocity directly from the star tracker measurements. Mathematic simulation results indicate the CMOS APS star tracker can give accurate attitude information and estimated angular rate. The method can be used as the chief attitude determination system design of low-cost satellite without gyros or be used as a backup strategy in the event of gyro failures to enhance the reliability of the attitude determination system.
	Mountain-based GPS observations of occultation and its inversion theory 期刊论文 OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2006, 卷号: 49, 期号: 1, 页码: 22-27 作者: Hu, X; Zhang, XX; Wu, XC; Xiao, CY; Zeng, Z 收藏 \| 浏览/下载：36/0 \| 提交时间：2015/07/17 mountain-based GPS radio occultation observation atmospheric refractivity ray bending angle lower atmosphere inversion