中国科学院机构知识库网格系统: 检索

Visible light driven low temperature photoactive energy storage materials for high rate thermal output system 期刊论文 OAI收割
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2021, 卷号: 231, 页码: 8
作者: Yang, Xiangyu; Li, Shijie; Zhao, Jianguo; Wang, Xiaomin; Huang, Hongyu

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收藏 | 浏览/下载：62/0 | 提交时间：2021/10/27

PCHS materials Visible light isomerization Remarkable storage performance Fatigue resistance High rate heat output

Input-Output Production Structure and Non-Linear Production Possibility Frontier 期刊论文 OAI收割
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2020, 页码: 18
作者: Jiang, Weimin; Fan, Jin; Tian, Kailan

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收藏 | 浏览/下载：27/0 | 提交时间：2021/01/14

Input output analysis marginal rate of transformation non-substitution theorem production possibility frontier

Development of economical-running strategy for multi-lamp UV disinfection reactors in secondary water supply systems with computational fluid dynamics simulations 期刊论文 OAI收割
CHEMICAL ENGINEERING JOURNAL, 2018, 卷号: 343, 页码: 317-323
作者: Qiang, Zhimin; Li, Mengkai; Li, Wentao; Wen, Dong

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收藏 | 浏览/下载：35/0 | 提交时间：2019/06/24

UV disinfection Secondary water supply Economical running Flow rate Lamp mode Lamp output power

One-Bit Precoding and Constellation Range Design for Massive MIMO With QAM Signaling 期刊论文 OAI收割
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, 2018, 卷号: 12, 期号: 3, 页码: 557-570
作者: Sohrabi, Foad; Liu, Feng; Yu, Wei

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收藏 | 浏览/下载：31/0 | 提交时间：2018/07/30

Low-resolution digital-to-analog converter (DAC) massive multiple-input multiple-output (MIMO) one-bit precoding quadrature amplitude modulation (QAM) symbol error rate (SER) symbol-level precoding zero-forcing (ZF)

Recursive identification of FIR systems with binary-valued outputs and communication channels 期刊论文 OAI收割
AUTOMATICA, 2015, 卷号: 60, 页码: 165-172
作者: Guo, Jin; Zhao, Yanlong; Sun, Chang-Yin; Yu, Yao

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收藏 | 浏览/下载：26/0 | 提交时间：2018/07/30

System identification Binary-valued output Communication channel Convergence Convergence rate

Development of fiber laser system for a photocathode gun 期刊论文 OAI收割
HIGH POWER LASER AND PARTICLE BEAMS, 2015, 卷号: 27, 期号: 5, 页码: 51002
作者: Xu JQ(徐金强); Sun DR(孙大睿); Xu; Jinqiang; Sun

收藏 | 浏览/下载：24/0 | 提交时间：2016/04/18

Kinds of lasers Laser products Laser systems Main amplifiers Output power Repetition rate Second harmonics Test systems

Communication synchronization in wireless optical link (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: Guo J.; Guo J.; Wang H.; Wang H.; Wang H.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

An FPGA based transceiving synchronization method is demonstrated for Free Space Optical (FSO) communication system which is discussed separately as the transmitting protocol and the receiving protocol. During the discussion of these two parts the co-operation of them is also discussed. The transmitting protocol interfaces the outer input data with a parallel port buffers the input data encodes the input data stream serializes the parallel data and outputs the serialized data. It also has an output management unit to manage the activity of each part of the transmitting protocol. The receiving protocol filters and synchronizes the input serial data stream parallels the serial data stream decodes the input data checks received error handles transmission exception and interfaces 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 users 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 a working solution at a certain bit rate scale. 2012 IEEE.

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：53/0 | 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 driving circuit for binocular CCD image system (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：43/0 | 提交时间：2013/03/25

The paper designs a driving circuit of high sensitive wide dynamic and high signal-to-noise ratio for binocular CCD imaging system which adopts a Dalsa-made high resolution full-frame 33-mega pixels area CCD FTF5066M. Inner structure and driving timing of the FTF5066M sensor are presented. Field Programmable Gate Array (FPGA) is used as the main device to accomplish the timing design of the circuits and power driver control of the two sensors. By using the Correlated Double Sampling (CDS) technique the video noise is reduced and the SNR of the system is increased. A 12- bit A/D converter is used to improve the image quality. The output rate of the imaging system designed with integrated chip can reach to 1.3 frames per second through bi-channel. For its good performance low power consumption and small volume the driving system can be applied to aeronautics and astronautics field. With a further improvement a maximum data output rate of 2.7 frames per second can be reached through all the eight channels of the two CCDs. 2010 Copyright SPIE - The International Society for Optical Engineering.

United steering of control moment gyros for small satellite with limited gimbal rate (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China
Xu K.; Jin G.; Chen C.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

Single Gimbal Control Moment Gyroscopes (SGCMG) can could provide large control torque and quick attitude maneuver rate to small satellites without any increase in power volume and mass which will help small satellites become more powerful. Singularity avoidance and failure steering are two important problems to SGCMGs and also the main focus in this field. A new united steering law for SGCMGs with capabilities of singularity avoidance and quick transition of singularity surfaces is developed in this paper. To ensuring the existence of null motion the commanded output of controller was changed real-timely as the variation of singularity measurement of SGCMGs which can avoid the gimbal angle rate saturation. This developed steering law could help the SGCMGs provide real-time control toques in spite of limitation of gimbal angle rate. Simulation analysis is conducted for a certain 4-SGCMG system mounted on a small satellite. Simulation results indicate that the steering law is very effective in singularity avoidance. 2010 IEEE.