中国科学院机构知识库网格系统: 检索

The update of BDS-2 TGD and its impact on positioning 期刊论文 OAI收割
ADVANCES IN SPACE RESEARCH, 2020, 卷号: 65, 期号: 11, 页码: 2645-2661
作者: Zhang, Yize; Chen, Junping; Gong, Xiuqiang; Chen, Qian

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收藏 | 浏览/下载：34/0 | 提交时间：2021/12/06

Timing group delay Differential code bias Signal-in-space range error Single point positioning Precise point positioning

Remote Sensing Image Registration Based on Improved KAZE and BRIEF Descriptor 期刊论文 OAI收割
International Journal of Automation and Computing, 2020, 卷号: 17, 期号: 4, 页码: 588-598
作者: Huan Liu; Gen-Fu Xiao

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收藏 | 浏览/下载：19/0 | 提交时间：2021/02/22

Remote sensing image image registration composite nonlinear diffusion filter binary code string multi-scale pyramid space.

Calibration and Impact of BeiDou Satellite-Dependent Timing Group Delay Bias 期刊论文 OAI收割
REMOTE SENSING, 2020, 卷号: 12, 期号: 1, 页码: 17
作者: Zhang, Yize; Wang, Hu; Chen, Junping; Wang, Ahao; Meng, Lingdong

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收藏 | 浏览/下载：38/0 | 提交时间：2021/09/26

BeiDou navigation satellite system broadcast ephemeris timing group delay differential code bias signal-in-space range error single point positioning

物体分类中的特征表达与样本不均衡问题研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2014
作者: 蔡慧雯

收藏 | 浏览/下载：103/0 | 提交时间：2015/09/02

基于聚类的线性判别分析特征子空间编码空间小样本样本不均衡 Cluster-based Linear Discriminative Analysis Feature Subspace Code Space Small Data Imbalanced Data

Space optical remote sensor of the CAE thermal control index calculation method (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China
作者: Li L.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

The thermal control indicators CAE methods of Space optical remote sensor are analyzed in the presented work. We sat up a thermal optical analysis model for space optical remote sensor. By assuming fully covered by in-orbit temperature load and using the finite element method for thermal deformation analysis we obtained the optical remote sensor surface deformation and displacement under various thermal loading. Using ZERNIKE polynomial wave was fitted to obtain ZERNIKE polynomial coefficients which were incorporated into the optical system design. Using CODE V optical calculation software heat-ray machines under elastic deformation of the system point spread function transfer function (MTF) wave front differential (WFE) etc. were calculated. Image quality changes of remote sensors are discussed in variety assumed cases such as temperature loads of quality change. By repeated iteration critical value of temperature fields meeting the design requirements are obtained for the optical system. Optical indicators were converged to the temperature field indicator then reasonable indicators of thermal control for remote sensors were obtained. For the thermal control design this method provided a reliable basis for design. (2011) Trans Tech Publications Switzerland.

Inspection focus technology of space tridimensional mapping camera based on astigmatic method (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
作者: Wang Z.; Wang Z.; Zhang L.; Zhang L.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

The CCD plane of the space tridimensional mapping camera will be deviated from the focal plane(including the CCD plane deviated due to camera focal length changed) under the condition of space environment and vibration impact when satellite is launching image resolution ratio will be descended because defocusing. For tridimensional mapping camera principal point position and focal length variation of the camera affect positioning accuracy of ground target conventional solution is under the condition of vacuum and focusing range calibrate the position of CCD plane with code of photoelectric encoder when the camera defocusing in orbit the magnitude and direction of defocusing amount are obtained by photoelectric encoder then the focusing mechanism driven by step motor to compensate defocusing amount of the CCD plane. For tridimensional mapping camera under the condition of space environment and vibration impact when satellite is launching if the camera focal length changes above focusing method has been meaningless. Thus the measuring and focusing method was put forward based on astigmation a quadrant detector was adopted to measure the astigmation caused by the deviation of the CCD plane refer to calibrated relation between the CCD plane poison and the asrigmation the deviation vector of the CCD plane can be obtained. This method includes all factors caused deviation of the CCD plane experimental results show that the focusing resolution of mapping camera focusing mechanism based on astigmatic method can reach 0.25 m. 2010 Copyright SPIE - The International Society for Optical Engineering.

Bootstrap loader design of aerospace payload controller based on TSC695F (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Computational Intelligence and Natural Computing, CINC 2010, September 13, 2010 - September 14, 2010, Wuhan, China
Xu W.; Piao Y.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

Anti-radiation TSC695F is usually used as aerospace payload controller in tasks to ensure the aerospace payload having extremely high reliability in abominable space environment. The processor bases on SP ARC V7 architecture with parity check and EDAC so it could design out high reliable bootstrap loader to guarantee the operation system of VxWorks and application codes loaded correctly and worked stable and high effective. First this paper put forward the system hardware composition and boot mode which apply for aerospace payload then it makes clear the related contents of register group initialization stack initialization system hardware initialization in bootstrap loader of TSC695F and give out the method to establish TRAP table. That's all through comparing different type of organize mode of program image. After that compiling of target codes have been described and the kernel code of MakeFile had been given at the same time for reference aimed at the realization of engineering. Although this paper is based on TSC695F but it could be extended to other embedded system based on SP ARC for bootstrap loader analysis and design for example the TSC697 which based on SP ARC V8 with higher performance so this paper has extremely high engineering value. 2010 IEEE.

Research into PCI express device's configuration space on PC platform (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Xu S.-Y.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

When developing BIOS or device driver on PC Platform it's necessary to access PCI configuration space and PCI Express extended configuration space. The register organization in PCI Express configuration space was detailed PCI capability structure and PCI Express Extended Capability structures were emphasized here. A way of accessing device configuration space utilizing flat memory addressing was given and its raw code was obtained on a Intel G31 chipset based PC. 2010 IEEE.

Modulation of spatial Stroop by object-based attention but not by space-based attention 期刊论文 OAI收割
QUARTERLY JOURNAL OF EXPERIMENTAL PSYCHOLOGY, 2010, 卷号: 63, 期号: 3, 页码: 516-530
作者: Luo, Chunming; Lupianez, Juan; Jesus Funes, Maria; Fu, Xiaolan

收藏 | 浏览/下载：24/0 | 提交时间：2014/06/16

Object-based attention Space-based attention Spatial Stroop effect Spatial code

基于RS编码及网格编码调制的光PPM通信纠错技术 期刊论文 OAI收割
光子学报, 2008, 卷号: 37, 期号: 7, 页码: 1361, 1364
梁波; 陈卫标

收藏 | 浏览/下载：1038/159 | 提交时间：2009/09/18

空间光通信 Communication performances RS纠错码 Effective communications TCM技术 External code PPM调制 Numerical simulations Optical channels Optical communication systems Optical- PPM modulation Reed-Solomon code RS coding Space optical communication TCM Trellis code modulations Trellis-code modulation