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Analysis of Unmanned Aerial Vehicle (UAV) Hyperspectral Remote Sensing Monitoring Key Technology in Coastal Wetland 会议论文
作者:  Ma Yi;  Zhang Jie;  Zhang Jingyu
收藏  |  浏览/下载：5/0  |  提交时间：2019/08/19
Analysis of Unmanned Aerial Vehicle (UAV) Hyperspectral Remote Sensing Monitoring Key Technology in Coastal Wetland 会议论文
作者:  Ma Yi;  Zhang Jie;  Zhang Jingyu;  Lv, Y;  Bao, W
收藏  |  浏览/下载：7/0  |  提交时间：2018/12/07
Analysis of Unmanned Aerial Vehicle (UAV) hyperspectral remote sensing monitoring key technology in coastal wetland 会议论文
Chengdu and Suzhou, China, 11 15, 2015 - 11 28, 2015
作者:  Ma, Yi;  Zhang, Jie;  Zhang, Jingyu
收藏  |  浏览/下载：6/0  |  提交时间：2018/12/12
Physical layer design for free space optical communication (EI CONFERENCE) 会议论文
2012 International Conference on Control Engineering and Communication Technology, ICCECT 2012, December 7, 2012 - December 9, 2012, Shenyang, Liaoning, China
Wang H.; Guo J.; Wang T.; Zhang Q.; Shao J.
收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25
A small size Free Space Optical Communication System is introduced  including the hardware and the hardware specified physical layer protocol. In detail  the rapid synchronization method to reduce the handshake bandwidth requirement is demonstrated. The hardware of the system includes the laser driver system  the signal amplifying and shaping system  the data interface system. The hardware specified physical layer protocol is used to interface the outer data  serialize and deserialize the data stream  check transmission errors and schedule the data transmission. The overall system is a FIFO-like system and the user can use it as if he's operating a FIFO. The system is designed mainly for terrestrial FSO link whose signal channel is the atmosphere. Due to the complex composition and activity of the atmosphere  this signal channel brings in great influence on the transmitting laser in it  for example  the absorption and scattering of the atmosphere molecules and aerosols  the scintillation of received laser power caused by the turbulence of the atmosphere  all of which results in a much higher Bit Error Rate (BER) of the communication system than wired communication systems leading to frequent resynchronization. In our system  the sampling clock is generated locally using multi-phase sampling technique rather than PLLbased clock recovery  which helps to rapid synchronization. 2012 IEEE.  
A study on atmospheric turbulence effects in full-optical free-space communication systems (EI CONFERENCE) 会议论文
2010 6th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2010, September 23, 2010 - September 25, 2010, Chengdu, China
Wu X.; Liu P.; Matsumoto M.
收藏  |  浏览/下载：14/0  |  提交时间：2013/03/25
Next generation free-space optical communication systems have used fiber-optic technology as the seamless connection between free-space and optical fiber. The full-optical free-space optical communication systems use optical fiber as the receiver to get faster communication speed. The atmospheric turbulence deeply influenced on the optical wave propagated in terrestrial application. As the active receiving area of the full-optical free-space optical communication systems is very small  it is important to research on the atmospheric turbulence effects on the full-optical free-space optical communication system. In this paper  we discuss about both the turbulence-induced intensity fluctuations and the angle-of-arrival effects in full-optical free-space optical communication systems which are used in a few kilometers communication. We gave the numerical results of the atmosphere turbulence effects on the free-space optical communication systems. In order to minimize the atmospheric turbulence influence on the full-optical free-space optical communications system  we also investigate the use of fine tracking system in the communication system. We have set up a full-optical free-space communication system in Tokyo and received useful data from the experiment. We compared the receiving power of the experiment  when the fine tracking system is On and Off. From the experiment results  we can see that the fine tracking system effectively mitigates the atmospheric turbulence and increases the receiving power of the communication system. 2010 IEEE.  
Microalgal Biofuels and Biorefinery –Status, Opportunities and Challenges 会议论文
FOOD, HEALTH AND FUEL: PLANTS FOR THE FUTURE, 马来西亚, 2009-11-2
张卫
收藏  |  浏览/下载：15/0  |  提交时间：2011/07/11
Microalgal Biofuels and Biorefinery: Current Status and Future Opportunities 会议论文
2009 international conference for bioeconomy, 中国, 2009-6-26
张卫
收藏  |  浏览/下载：14/0  |  提交时间：2011/07/11
Transceiving protocol designc for a free space optical communication system (EI CONFERENCE) 会议论文
2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, November 16, 2008 - November 19, 2008, Beijing, China
Hualong W.; Wanxin S.; Zhongbao X.
收藏  |  浏览/下载：41/0  |  提交时间：2013/03/25
A new transceiving protocol is demonstrated for a Free Space Optical (FSO) communication system  and it's discussed in two parts: the transmitting protocol and the receiving protocol. During the discussion of these two parts  the cooperation of them is also discussed. Different from wired communication  an FSO system modulates the data on a narrow beam of laser transmitting through the free space or the atmosphere  and the protocol presented in this paper is mainly optimized for terrestrial Free Space Optical links  in which the signal channel of the system is mainly the atmosphere. Due to the complex composition and activity of the atmosphere  this signal channel brings in great influence on the transmitting laser in it  for example  the absorption and scattering of the atmosphere molecules and aerosols  the scintillation of received laser power caused by the turbulence of the atmosphere  all of which results in a much higher Bit Error Rate (BER) of the communication system. Thus in designing a protocol for an FSO system  more effort should be taken in the encoding of the data stream  the synchronization of the data stream  error checking and exception handling. The main function of the transmitting protocol includes interfacing the outer input data with a parallel port  buffering the input data  encoding the input data stream  serializing the parallel data and output the serialized data. It also has an output management unit to manage the activity of each part of the transmitting protocol. The main function of the receiving protocol includes filtering and synchronizing the input serial data stream  paralleling the serial data stream  decoding the input data  error checking  exception handling and interfacing the outer receiver with a parallel port. The entire transceiving protocol could be programmed into a single FPGA chip to improve system integrity and reduce the system cost. The presented protocol could be taken as "protocol transparent" for outer interfaces  meaning that when interfacing the presented system to an outer system  you don't have to consider what protocol the outer system transceiving data stream is under  for example  the TCP/IP protocol or anything else  in the case that its I/O interface is a parallel port. Simulation and final experiment prove that the protocol presented is working fine at a certain bit rate scale. 2009 SPIE.  
Microalgal bioenergy and biofuel:solar energy utlization and sustainable biomass feedstock 会议论文
the nternational conference on biorefinery, 中国, 2007-10-20
张卫
收藏  |  浏览/下载：16/0  |  提交时间：2011/07/11
Modelling the spatial distribution of actual terrestrial evapotranspiration using a hydrological and meteorological approach 会议论文
Iahs Publication
作者:  Xia J.
收藏  |  浏览/下载：6/0  |  提交时间：2012/06/30

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