中国科学院机构知识库网格系统: 检索

Research and progress of Intelligent Drilling Technology System and related theories 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2023, 卷号: 66, 期号: 1, 页码: 1-15
作者: Zhu RiXiang; Jin ZhiJun; Di QingYun; Yang ChangChun; Chen WenXuan

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收藏 | 浏览/下载：36/0 | 提交时间：2023/03/30

Intelligent Drilling System Equipment research and development Rotary Steering System Geosteering System High Speed Transmission System Test platform

Research on High-Definition and High-Speed Video Transmission Technology Based on Double SDI 会议论文 OAI收割
Changsha, China, 2019-09-20
作者: Zhang, Hai Feng; Xie, Qing Sheng; Wang, Hua; Bian, He; Feng, Jia

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收藏 | 浏览/下载：30/0 | 提交时间：2020/06/18

Double SDI High-definition and high-speed Video transmission Lossless Private protocol

First prototype of high-speed data acquisition system of ion source for neutral beam injection on EAST 期刊论文 OAI收割
FUSION ENGINEERING AND DESIGN, 2018, 卷号: 129, 期号: 无, 页码: 183-189
作者: Liu, Wei; Hu, Chundong; Wang, Yan; Liu, Sheng; Song, Shihua

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收藏 | 浏览/下载：82/0 | 提交时间：2019/08/23

Neutral beam injection High-speed data acquisition FPGA Isolation transmission

An investigation of the aerodynamic noise of long-grouped high speed trains 会议论文 OAI收割
Cagliari, Sardinia, Italy , 5-8 April 2016
作者: Sun ZX(孙振旭); Yang GW(杨国伟); Guo DL(郭迪龙)

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收藏 | 浏览/下载：39/0 | 提交时间：2018/11/08

Acoustic noise Acoustic variables measurement Acoustic wave transmission Aerodynamics Architectural acoustics Computational aeroacoustics Numerical models Railroad transportation Railroads Speed Turbulence Vehicles Aerodynamic noise High speed train (HST) Non linear acoustics Sound power Sound pressure level

Design of data transmission for a portable DAQ system 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2014, 卷号: 25
作者: Zhou Wen-Xiong; Wang Yan-Yu; Nan Gang-Yang; Zhang Jian-Chuan

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收藏 | 浏览/下载：29/0 | 提交时间：2018/07/05

Field Programmable Gate Array (Fpga) Advanced Risc Machines (Arm) High-speed Transmission Driver Data Acquisition (Daq)

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：55/0 | 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.

Design of transmission of high-speed CCD driving signals (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
作者: Zhang S.

收藏 | 浏览/下载：77/0 | 提交时间：2013/03/25

In order to overcome the distortion problem of CCD driving signals caused by signal transmission the detail implementation of transmission of high-speed CCD driving signals based on transmission line theory is discussed. The CCD driving signals are critical to the CCD to produce high quality images. In high speed application these drivers will occupy more circuit board areas and can not be put very close to the CCD. So the driving signals must be transmitted. Because the CCD exhibits capacitive load the driving signals distortion problem is much severe. Transmission line theory is used to analyze the problem. The method of source termination is adopted to avoid signal reflections. Meanwhile the characteristic impedance of the circuit board and the resistance of terminal resistor are designed small enough to decrease the rising and falling time of the driving signals. Experimental results show that there is no distortion of the high speed driving signals after transmission. 2011 IEEE.

The design of high speed image acquisition system over Gigabit Ethernet (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Wireless Communications, Networking and Information Security, WCNIS 2010, June 25, 2010 - June 27, 2010, Beijing, China
作者: Zhang W.; He X.; Zhang W.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

The applications based on traditional digital cameras have been limited by distance cost and networking. Gigabit Ethernet is a data transmission standard based on the IEEE 802.3 protocol brings several benefits to image transmission. In this paper we compare the main features of Gigabit Ethernet and traditional digital camera interfaces. And we design a high speed image acquisition system which overcomes these application limitations by allowing cameras to send imaging data over Gigabit Ethernet. In this system we design a highly efficient bidirectional conversion device based on FPGA converts imaging data from a camera to IP packets based on UDP protocol and sends it to PCs over inexpensive Cat-5 copper LAN cable. At the PC the Cat-5 cable plugs into a standard Gigabit Ethernet NIC(network interface card) eliminating the need for a frame grabber. An communications application software is used to acquire the network data construct and display the image. A simple and efficient acknowledge and resend mechanism was used to guarantee packet delivery. The system architecture and the communication protocol are discussed in details the experiment and results are presented in this paper. 2010 IEEE.

An advanced LEO satellite network model based on MPLS-TP (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Advanced Intelligence and Awareness Internet, AIAI 2010, October 23, 2010 - October 25, 2010, Beijing, China
作者: Zhang Y.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

LEO (Low Earth Orbit) satellite networks are capable of providing broadband access to end users in any part of the world. With the characteristics of high-speed movement and rapid dynamic topology of LEO satellites networking has always been one of the key issues in LEO satellite network. MPLS-TP (Multi-Protocol Label Switching-Transport Profile) is an excellent packet transport network (PTN) technology in terrestrial networks which can support multi-service and have perfect function of QoS (Quality of Service) OAM (Operation Administration Maintenance) and survivability. In this paper the characteristics of LEO satellite network and functional architecture of MPLS-TP are introduced. Then an advanced LEO satellite network model based on MPLS-TP (ALSN-M) is proposed which can guarantee a connection-oriented seamless data transmission. Furthermore topology and routing algorithms of proposed LEO satellite network model is analyzed. In the end the paper describes how to setup and remove a LSP (Label Switched Path) and how to maintain an exiting LSP when a handover happens.

OFDM baseband modulation technology based on VHDL (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Advanced Computer Control, ICACC 2010, March 27, 2010 - March 29, 2010, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States
Lin L.; Qiao Y.-F.; Su W.-X.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

In order to improve the transmission velocity in mulitipath fading wireless channel two main advantages are obtained via discussing spectrum utilization ratio of OFDM. Then the high speed OFDM technology receives increasing attentions in mobile communication. Modulation programs are designed with VHDL based on the principle of OFDM in the paper. First from the results of VHDL simulation after OFDM fundamental is introduced the realization of baseband operations such as interleaver subcarrier modulation IFFT and adding CP are presented. Finally implemented programs are validated on the actual implement system. Experimental results indicate that setup time corresponding to transmission velocity is only 71.05s and steady time is approximately 6 times as setup time that is not only achieving the high speed transmission but also supplying adequate modulation time. 2010 IEEE.