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	Quantitative simulating experiment of atmospheric turbulence scintillation for light field imaging 会议论文 OAI收割 Kunming, China, 2021-12-07 作者: Cheng, Zhiyuan; Ma, Qing; Li, Zhiguo; Xia, Aili; Ji, Zhou \| 收藏 \| 浏览/下载：115/0 \| 提交时间：2022/04/27 atmosphere scintillation quantitative scintillation simulating experiment imaging quality light field imaging
	The bright star survey telescope for the planetary transit survey in Antarctica 期刊论文 OAI收割 SCIENCE BULLETIN, 2016, 卷号: 61, 期号: 5, 页码: 383 作者: Tian Qiguo; Jiang Peng; Du Fujia; Wang Jian; Li Zhengyang \| 收藏 \| 浏览/下载：25/0 \| 提交时间：2021/12/06 DIGITAL SKY SURVEY K-DWARF DOME-C PHOTOMETRY MASS SCINTILLATION ATMOSPHERE COMPANION Instrumentation Exoplanet Photometry Antarctic Site
	Physical layer design for free space optical communication (EI CONFERENCE) 会议论文 OAI收割 2012 International Conference on Control Engineering and Communication Technology, ICCECT 2012, December 7, 2012 - December 9, 2012, Shenyang, Liaoning, China 作者: Wang H.; Zhang Q.; Guo J.; Guo J.; Wang H. 收藏 \| 浏览/下载：29/0 \| 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.
	Transceiving protocol designc for a free space optical communication system (EI CONFERENCE) 会议论文 OAI收割 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：57/0 \| 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.
	Optical spectroscopy of undoped PbWO4 powders with different annealing atmospheres 期刊论文 OAI收割 Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment, 1999, 卷号: 426, 期号: 2-3, 页码: 464-468 F. X. Liu; X. Y. Zhang; J. M. Zhao; J. Y. Wang; L. Liu; Z. Z. Xu; S. Z. Jin; R. Ji 收藏 \| 浏览/下载：24/0 \| 提交时间：2012/04/14 PbWO4 crystal optical spectroscopy annealing atmosphere color center single-crystals scintillation origin