中国科学院机构知识库网格系统: 检索

Cabled seafloor observation technology : a case study of the submarine seismic station in Wuyu Island 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2019, 卷号: 62, 期号: 11, 页码: 4323-4338
作者: Hao TianYao; Guo YongGang; Zhang YiFeng; You QingYu; Xie ZhiZhao

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收藏 | 浏览/下载：35/0 | 提交时间：2020/05/18

Submarine cabled seismic station Wuyu Island Seabed base Underwater connection device Real time transmission

开放式数字印刷控制系统中的关键技术研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2014
作者: 胡建华

收藏 | 浏览/下载：65/0 | 提交时间：2015/09/02

开放式大幅面多通道数字印刷控制系统阈值噪声调制误差扩散高实时性数字印刷传输协议 Large format multi-channel open digital printing control system Threshold noise modulation Error diffusion High real-time performance digital printing transmission protocol

Filament growth dynamics in solid electrolyte-based resistive memories revealed by in situ TEM 期刊论文 OAI收割
NANO RESEARCH, 2014, 卷号: 7, 期号: 7, 页码: 1065
Tian, XZ; Wang, LF; Wei, JK; Yang, SZ; Wang, WL; Xu, Z; Bai, XD

收藏 | 浏览/下载：19/0 | 提交时间：2015/04/14

resistive switching conductive filaments in situ transmission electron microscope real-time observation computer simulation

Research and optimization on media access control delay of CAN (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Information Technology and Management Innovation, ICITMI 2012, November 10, 2012 - November 11, 2012, Guangzhou, China
作者: Zhang H.; Zhang W.; Zhang W.; Zhang H.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

With data quantity increasing dramatically and signal transmission period becoming more and more fast the media access control delay has proved to be one of the main influence factors of CAN network real-time. Firstly an equivalent numerical simulation model of CAN bus network is built to derivate the mathematical expression of media access control delay. Secondly optimization measures are further proposed to improve the data communication real-time. At last the optimization measures tested by experiments are proved to be correct and effective. (2013) Trans Tech Publications Switzerland.

Development of Vehicle Management Platform Based on ArcGIS 会议论文 OAI收割
International Conference on Computer, Networks and Communication Engineering (ICCNCE), Beijing, MAY 23-24, 2013
作者: Mei J(梅晶); Song H(宋宏); Shang WL(尚文利); Zhou XF(周晓锋)

收藏 | 浏览/下载：13/0 | 提交时间：2014/04/16

Vehicle management platform ArcGIS real-time monitoring Data transparent transmission History track replay

Design of high speed and parallel compression system used in the big area CCD of high frame frequency (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Precision Engineering and Non-Traditional Machining, PENTM 2011, December 9, 2011 - December 11, 2011, Xi'an, China
作者: Li G.-N.; Jin L.-X.; Zhang R.-F.; Wang W.-H.; Li G.-N.

收藏 | 浏览/下载：46/0 | 提交时间：2013/03/25

According to the area CCD camera of characteristics such as high resolution capacity and high frame frequency this paper puts forward a high speed and parallel image compression system of high integration degree. Firstly according to the work principle of the area CCD FPGA is adopted to realize the timing driving and multichannel and parallel analog signal handling to raise the export frame frequency of the area CCD. Secondly with an image compression scheme based on FPGA embedded processor MicroBlaze and ADV212 compression chip real time image compression and the high speed area CCD are realized. Finally by detecting the analog signal of the area CCD output the real time compression of the big area CCD image is carried out in different compression ratios and the compression performance is analyzed. Experiment result shows that this scheme can realize real time image compression with the biggest data rate of 520Mbps. When compression bit ratio is 0.15 the signal-to-noise ratio of peak value can reach 36 dB. Image collection and image compression are integrated which reduces the data transmission between them and improves systematic integration degree.

Efficient rate control technique for CCSDS image encoding (EI CONFERENCE) 会议论文 OAI收割
IEEE 2nd International Conference on Computing, Control and Industrial Engineering, CCIE 2011, August 20, 2011 - August 21, 2011, Wuhan, China
Jin L.

收藏 | 浏览/下载：85/0 | 提交时间：2013/03/25

For the limitation of data transmission bandwidth and real time transmission demand generally image compression is required to implement the precise and flexible rate control algorithm. Rate control is an important issue in the image compression field. This paper considers the problem of rate allocation to each encoded segment for CCSDS image compression. One straightforward method is to allocate an equal amount of rate to each segment based on the average of the total number of compressed bytes. The obvious drawback of this method is that different segment will be reconstructed to different quality so the overall quality of the reconstructed image will not be optimized. For the shortage of the original rate control method as to improve the overall quality of the reconstructed image an improved rate control algorithm is proposed for CCSDS image encoding. The key component of the proposed rate control method is the appropriate rate allocation. Experiments on the test images show that the PSNR can be increased at about 0.3dB on average compared to the original algorithm. Therefore experimental results confirm the effectiveness of the proposed algorithm in terms of objective evaluation and the rate-distortion performance of the reconstructed image is improved. 2011 IEEE.

Development situation and trend of domestic and international aerial mapping camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
Ming L. W.; Xue L.; Hui C. X.; Jun L. Q.

收藏 | 浏览/下载：11/0 | 提交时间：2013/03/25

In the modern military affairs especially in the complex field the acquirement of real-time battlefield information and intelligence is getting more and more important most of this work is completed by aerial reconnaissance or aerial mapping equipment. Aerial mapping camera with time-sensitive and flexible features is playing an increasingly important role in modern warfare. With the development of technology aerial mapping camera has also gone through several generations gradually from film-based type to transmission type. The theory and composition of domestic and international typical aerial mapping camera is introduced from the development situation and trend in this paper. Finally with the domestic research status the development trend of aerial mapping camera is proposed. 2011 IEEE.

DVI interface, optical fiber video transceiver used in LED display system (EI CONFERENCE) 会议论文 OAI收割
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011, May 27, 2011 - May 29, 2011, Xi'an, China
作者: Wang R.; Li S.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

A professional DVI-Video optical fiber transceiver was designed based on FPGA (Field Programmable Gate Array) in order to meet the need of real-time LED display. The system could be used to transmit a non-loss real-time video source whose resolution was 1024 768 and refresh rate was 60Hz in a single mode optical fiber. The top-down design method was used while programming FPGA. Some module design ideas were discussed including video data acquisition caching framing frame detecting and video reproducing. The required bandwidth of each module was analyzed and calculated in details. Some relevant simulation results were also given. In practical test real-time video display was achieved. And the transmission rate of coded data was up to 2Gbps and the transmission distance could reach 10km. 2011 IEEE.

Dynamic closed-loop test for real-time drift angle adjustment of space camera on the Earth (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者: Xu S.; Wang D.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

In order to eliminate the influence of aircraft attitude angle to the image quality of space camera and assure that the drift angle of space camera could be accurately adjusted at the orbit a novel closed-loop test method is provided for real-time drift angle adjustment of space camera on the Earth. A long focal length dynamic aim generator is applied to simulate the image motion and the variety drift angle and to detect the precision of the image motion compensation machinery and the capability of the drift angle control system. The computer system is used to control the dynamic aim generator accomplish the data processing transmit and receive the data information. The seamless connection and the data transmission between the aim generator and the aircraft simulation devices are constituted. The command parameter and drift angle data transmitted by the simulation devices are received by the space camera at the real time then the photos are taken and the draft angle is adjusted simultaneously. It is shown that the drift angle can be accurately tracked by the space camera at the real time and the detective method satisfies the test requirement. 2010 Copyright SPIE - The International Society for Optical Engineering.