中国科学院机构知识库网格系统: 检索

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	Leveraging intergovernmental data sharing for digital transformation in ecological and environmental protection 期刊论文 OAI收割 JOURNAL OF CLEANER PRODUCTION, 2024, 卷号: 477, 页码: 143780 作者: Sun, Yong; He, Jiarui; Xiang, Qingping; Zhou, Kan \| 收藏 \| 浏览/下载：15/0 \| 提交时间：2024/11/19 Ecological and environmental protection Digital transformation Data sharing Government management Evolutionary game
	Research on Large Caliber FSM Digital Control System Based on Voice Coil Motor 会议论文 OAI收割 Chengdu, China, 2019-12-20 作者: Cao, Yu; Wang, Haitao; Lv, Tao; Wang, Rui; Jing, Feng \| 收藏 \| 浏览/下载：82/0 \| 提交时间：2020/03/23 large-scale network Fast-steering Mirror Control Displacement Coordinate Transformation Digital Notch Filter Closed-loop Control
	A Novel Robust Digital Image Watermarking Algorithm based on Two Level DCT 会议论文 OAI收割 Hokkaido,Japan, 2014.4.26-2014.4.28 作者: Hu Guan; Zhi Zeng; Jie Liu; Shuwu Zhang \| 收藏 \| 浏览/下载：32/0 \| 提交时间：2017/09/20 Digital Image Watermarking Discrete Cosine Transformation Invisibility Robustness
	Research on computer control strategy for optical electric tracking system (EI CONFERENCE) 会议论文 OAI收割 2011 IEEE International Conference on Mechatronics and Automation, ICMA 2011, August 7, 2011 - August 10, 2011, Beijing, China 作者: Li M. 收藏 \| 浏览/下载：31/0 \| 提交时间：2013/03/25 In this paper mathematic model and computer control strategy for optical electrical tracking system have been researched and discussed. First the system's structure and its work process have been analyzed. Second according to the system's moving law the system's mathematic model has been built. As to the computer control strategy trigger guiding two closed loop PID control method as well as compound control method have been applied to satisfy the tracking accuracy. Third we apply the bilinear transformation to get the digital system and the sample time is 800Hz. The simulation results indicate that the maximum tracking error can be limited to less than 0.5 and the regulator time can be 0.04s. Then the control project resonance frequency should be more than 200Hz and the sample frequency should be more than 400Hz to meet the control accuracy requirement. So we can conclude that the system indexes such as swiftness high accuracy as long as real time have been satisfied. And the requirement of mechanical property has been present which is very useful to mechanical working. 2011 IEEE.
	A small thickness measurement system based on PSD and FPGA (EI CONFERENCE) 会议论文 OAI收割 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China 作者: Guo J.; Guo J.; He X. 收藏 \| 浏览/下载：33/0 \| 提交时间：2013/03/25 Considering that the requirement of industrial manufacture An AT89S51 singlechip works as the core processor of the system. By two laser triangulation a small thickness measurement system based on PSD and FPGA is presented. It takes S3931 PSD of one dimension as position detection device A FPGA produces logic control signals for the whole system the small displacement is converted to differential voltages which is made by Hamamatsu in Japan and after amplification and A/D transformation 8-bit parallel data is send to singlechip from FPGA by external interrupts and the final calculation results output to the LCD display module. After digital micro meter calibration we get the small thickness. Experiments show that the detection accuracy of the system is not less than 10um.
	A solution model of System's Interior Orientation Parameters (SIOP) of the Multi-digital Cameras System based on the DLT algorithm 会议论文 OAI收割 Mippr 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications Sun, Tao; Fang, Junyong; Liu, Xue; Wang, Jinnian; Tong, Qingxi 收藏 \| 浏览/下载：27/0 \| 提交时间：2014/12/07 SIOP Multi-digital cameras system Direct Linear Transformation Match of Control Points Inside Control Field CALIBRATION
	数字媒体内容版权保护关键技术研究学位论文 OAI收割工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2010 作者: 唐小军收藏 \| 浏览/下载：203/0 \| 提交时间：2015/09/02 数字水印数字版权管理数字媒体几何攻击仿射变换混淆攻击扩频水印加权系数加解密白盒AES算法 Digital watermark Digital copyrights management Digital media Geometric attacks Affine transformation attacks Ambiguity attacks Spread spectrum watermark Weighting factors Encryption and decryption White-box AES implementation
	Matrix transformation of digital image and its periodicity 期刊论文 OAI收割 PROGRESS IN NATURAL SCIENCE, 2001, 卷号: 11, 期号: 7, 页码: 542-549 作者: Qi, DX; Wang, DS; Yang, DL \| 收藏 \| 浏览/下载：23/0 \| 提交时间：2019/12/16 digital image scrambling transformation Arnold transformation periodicity matrix transformation security
	Digital image analysis technique - 2DFT and its application 期刊论文 OAI收割 CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE, 1997, 卷号: 18, 期号: 11, 页码: 1869-1874 作者: Zhang, JW; Zhang, HD; Yan, D; Chen, ZHO; Yang, YLA \| 收藏 \| 浏览/下载：26/0 \| 提交时间：2019/04/09 Digital Image Analysis Technique (Dia) Two-dimensional Fourier Transformation (2dft) Phase Separation Dynamics Light-scattering