中国科学院机构知识库网格系统: 检索

International Round-Robin Test of Critical Current of Superconducting Cable Sample 期刊论文 OAI收割
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2024, 卷号: 34
作者: Matsushita, T.; Kiuchi, M.; Masuda, T.; Mukoyama, S.; Funaki, K.

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收藏 | 浏览/下载：18/0 | 提交时间：2024/11/20

Superconducting cables Current measurement Standards Cable shielding Power cables Temperature measurement Electric fields Critical current experimental standard deviation n-value round-robin test superconducting cable

Design and characterization of the non-uniform solar flux distribution measurement system 期刊论文 iSwitch采集
Applied thermal engineering, 2019, 卷号: 150, 页码: 294-304
作者: Wang, Yanjuan; Liu, Qibin; Lei, Jing; Liu, Feng

收藏 | 浏览/下载：606/0 | 提交时间：2019/05/08

Experimental investigation Solar flux distribution Parabolic trough solar collector Solar flux measurement system

Urban-scale SALSCS, Part I: Experimental Evaluation and Numerical Modeling of a Demonstration Unit 期刊论文 OAI收割
AEROSOL AND AIR QUALITY RESEARCH, 2018, 卷号: 18, 期号: 11, 页码: 2865-2878
作者: Cao, Qingfeng; Kuehn, Thomas H.; Shen, Lian; Chen, Sheng-Chieh; Zhang, Ningning

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收藏 | 浏览/下载：50/0 | 提交时间：2020/06/23

SALSCS demonstration unit Air pollution remediation Experimental measurement Model validation Solar chimney

Measurements of emission factors of PM2.5, OC, EC, and BC for household stoves of coal combustion in China 期刊论文 OAI收割
ATMOSPHERIC ENVIRONMENT, 2015, 卷号: 109, 页码: 190-196
作者: Chen, Yingjun; Tian, Chongguo; Feng, Yanli; Zhi, Guorui; Li, Jun

收藏 | 浏览/下载：62/0 | 提交时间：2015/07/31

Emission factor Experimental measurement Fine particle Black carbon Elemental carbon Residential coal combustion

Experimental measurement of radiation dose in a dedicated breast CT system 期刊论文 OAI收割
CHINESE PHYSICS C, 2014, 卷号: 38, 期号: 3, 页码: 38201
作者: Shen SW(申善威); Wang YF(王燕芳); Shu H(舒航); Shen, SW; Wang, YF

收藏 | 浏览/下载：41/0 | 提交时间：2016/04/08

dedicated breast CT radiation dose experimental measurement

Optimum design of laser encoding and decoding on laser beam-riding guidance (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2011, December 11, 2011 - December 13, 2011, Taichung, Taiwan
作者: Yang L.

收藏 | 浏览/下载：39/0 | 提交时间：2013/03/25

Operating principle of laser beam-riding guidance was set forth. Based on the principle of spatial frequency-encoding experimental results demonstrated that the receiver can receive correctly the encoded signal and can decode the signal an optimum laser encoding mode was designed measurement for the missdistance is feasible and all the performance parameters satisfy the demand. (2012) Trans Tech Publications which can transfer continuous laser into pulse laser that represents different position information. Then the mathematic model of deviation from target is built Switzerland. a modified encoding pattern was presented which is composed of two light paths crossed 90. Azimuth information of target is given in orthogonal coordinate system and deviation from target is linearity. As well as characteristic distribution of spatial laser field is analyzed. Corresponding decoding mode was presented by testing in 2 kilometers outdoor

Design of a miniature axial flux flywheel motor with PCB winding for nanosatellites (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
Wu J.

收藏 | 浏览/下载：45/0 | 提交时间：2013/03/25

This paper presents the design and analysis of an axial flux permanent-magnet (AFPM) machine for nanosatellites application. It is a miniature axial flux surface mounted permanent magnet flywheel motor using a printed circuit board (PCB) stator winding. The PCB stator has simplified the design and construction and avoids unnecessary space since size reduction has become one of the most important aspects of flywheel motor design for nanosatellites. The performances of the machine are estimated by combination method of three-dimensional (3D) electromagnetic finite element analysis (FEA) and approximate theoretical analysis. The back EMF and electromagnetic torque are derived. A comparison between the analysis and experimental measurement results of the prototype machine is also presented. Both simulated and experimental results show that the proposed motor would be an acceptable solution for the nanosatellite applications with advantages such as simple structure and low-cost as multi-layer circuit board production techniques have made the production of printed circuit coils cheaper and easier. 2012 IEEE.

Laser pulse coded signal frequency measuring device based on DSP and CPLD (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, May 24, 2011 - May 26, 2011, Beijing, China
作者: Zhang H.-B.; Wang T.-F.; Guo R.-H.; Li Y.; Li Y.

收藏 | 浏览/下载：46/0 | 提交时间：2013/03/25

Laser pulse code is an anti-jamming measures used in semi-active laser guided weapons. On account of the laser-guided signals adopting pulse coding mode and the weak signal processing it need complex calculations in the frequency measurement process according to the laser pulse code signal time correlation to meet the request in optoelectronic countermeasures in semi-active laser guided weapons. To ensure accurately completing frequency measurement in a short time it needed to carry out self-related process with the pulse arrival time series composed of pulse arrival time calculate the signal repetition period and then identify the letter type to achieve signal decoding from determining the time value number and rank number in a signal cycle by Using CPLD and DSP for signal processing chip designing a laser-guided signal frequency measurement in the pulse frequency measurement device improving the signal processing capability through the appropriate software algorithms. In this article we introduced the principle of frequency measurement of the device described the hardware components of the device the system works and software analyzed the impact of some system factors on the accuracy of the measurement. The experimental results indicated that this system improve the accuracy of the measurement under the premise of volume real-time anti-interference low power of the laser pulse frequency measuring device. The practicality of the design reliability has been demonstrated from the experimental point of view.

Data processing method of multi-position strap-down north seeking system based on SVD (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
Shen C.-W.; Liu C.; Yu S.-B.; Wang Z.-Q.; Li J.-R.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

With the aim to fit the sin wave curve of a multi-position strap-down north seeking system and to calculate the real north angle accurately the principles of the system and the algorithm of singular value decomposition(SVD) are introduced. The factors influencing the measuring precision are also analyzed. Then the algorithm is adopted to fit curves. Experimental results indicate that the singular value decomposition is very precise for its error sum is 1.1102V and the squared error is 2.8mV. Moreover for phase angle measurement measured six times in same direction the squared error is 24 (1). The method based on SVD can satisfy the system precision requirements of curve-fitting north seeking systems. 2011 IEEE.

The research of the accurate measure of static transfer function for the TDI CCD camera (EI CONFERENCE) 会议论文 OAI收割
3rd International Photonics and OptoElectronics Meetings, POEM 2010, November 2, 2010 - November 5, 2010, Wuhan, China
Guo-Ning L.; Long-Xu J.; Jian-Yue R.; Wen-Hua W.; Shuang-Li H.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

In the test course of static transfer function of TDI CCD camera because of the influence that gets environmental and artificial etc. factor the value of static transfer function measured at any time is between unceasing fluctuation so make accuracy reduce. To solve this problem a kind of accurate measurement technique of static transfer function is put forward. First before carrying out the measure of static quiet of transfer function the best test point of transfer function of the TDI CCD camera must be determined it is parallel to guarantee the rectangle target surface of parallel optical pipe and camera focal plane maintenance parallel and again guarantee target strip in rectangle target and TDI CCD in camera focal plane maintenance vertical. TDI CCD catches rectangle target image per 1000 lines of target mark image as a measures sample of static transfer function exclude because of atmosphere tremble twisted vague rectangle target mark image retain 500 distinct and steady target mark image as measure sample set. Then calculate the static transfer function of each measure sample respectively take the average of all static quiet transfer function in measure sample set as the static transfer function of camera. Finally the measure of the static transfer function for TDI CCD camera makes error analysis. Experimental results indicate that the value of the static transfer function of TDI CCD camera measured with this kind of method is 0.2923 with before measurement technique comparison the value of static transfer function has raised 0.02 makes the accuracy of the measure of static transfer function have gotten raising.