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A Design of High-precision High-Voltage Fiber-Optic Analog Signal Isolation Converter 被引量:1
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作者 李建伟 许留伟 +1 位作者 刘小宁 杨雷 《Plasma Science and Technology》 SCIE EI CAS CSCD 2002年第3期1281-1287,共7页
This paper introduces a design of high-precision high-voltage fiber-optic analog sig-nal isolation converter based on the technology of Voltage-to-Frequency (V/F) and Frequency-to-Voltage (F/V) conversion. It describe... This paper introduces a design of high-precision high-voltage fiber-optic analog sig-nal isolation converter based on the technology of Voltage-to-Frequency (V/F) and Frequency-to-Voltage (F/V) conversion. It describes the principle, system configuration and hardware design. 展开更多
关键词 In design A design of High-precision High-Voltage Fiber-Optic Analog Signal isolation Converter FVC VFC
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Research on Structural Design of Coal Crusher House in Thermal Power Plant
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作者 Junhu Wang 《Journal of Architectural Environment & Structural Engineering Research》 2020年第2期14-17,共4页
This paper takes the specific characteristics of pulverized coal room in thermal power plant as the starting point,firstly,this paper analyzes the process layout and structure selection,and then the structural design ... This paper takes the specific characteristics of pulverized coal room in thermal power plant as the starting point,firstly,this paper analyzes the process layout and structure selection,and then the structural design and vibration design requirements of coal crusher house are introduced in this paper.Finally,based on the engineering example,a new structure form of vibration isolation design is creatively proposed,which provides a new design idea for the practical engineering design. 展开更多
关键词 Coal-fired power plant Coal crusher house Vibration calculation Vibration isolation design
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EFFECTS OF INCOMING FLOW ASYMMETRY ON SHOCK TRAIN STRUCTURES IN CONSTANT-AREA ISOLATORS 被引量:2
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作者 王成鹏 张堃元 程克明 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2006年第1期1-7,共7页
To simulate the actual flowfield at the exit of the supersonic/hypersonic inlet, a wind tunnel is designed to study the flow in the scramjet isolator under the asymmetric incoming flow. And compression fields in the i... To simulate the actual flowfield at the exit of the supersonic/hypersonic inlet, a wind tunnel is designed to study the flow in the scramjet isolator under the asymmetric incoming flow. And compression fields in the isolator are investigated using wall static and pitot pressure measurements. Three incoming Mach numbers are considered as 1.5, 1.8 and 2. Results show that the increase of the asymmetry of the flow at the isolator entrance leads to the increase of the shock train length in the isolator for a given pressure ratio. Based on the analysis of the flow asymmetry effect at the isolator entrance on the shock train length, a modified correlation is proposed to calculate the length of the shock train. Predicted results of the proposed correlation are in good agreement with the experimental data. 展开更多
关键词 asymmetric supersonic flow shock train isolator design SCRAMJET wind tunnel test
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Control of coal and gas outbursts in Huainan mines in China: A review 被引量:19
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作者 Liang Yuan 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2016年第4期559-567,共9页
An investigation was conducted on the overall burst-instability of isolated coal pillars by means of the possibility index diagnosis method(PIDM). First, the abutment pressure calculation model of the gob in side di... An investigation was conducted on the overall burst-instability of isolated coal pillars by means of the possibility index diagnosis method(PIDM). First, the abutment pressure calculation model of the gob in side direction was established to derive the abutment pressure distribution curve of the isolated coal pillar. Second, the overall burst-instability ratio of the isolated coal pillars was defined. Finally, the PIDM was utilized to judge the possibility of overall burst-instability and recoverability of isolated coal pillars.The results show that an overall burst-instability may occur due to a large gob width or a small pillar width. If the width of the isolated coal pillar is not large enough, the shallow coal seam will be damaged at first, and then the high abutment pressure will be transferred to the deep coal seam, which may cause an overall burst-instability accident. This approach can be adopted to design widths of gobs and isolated coal pillars and to evaluate whether an existing isolated coal pillar is recoverable in skip-mining mines. 展开更多
关键词 Width design Skip-mining Isolated coal pillar Overall burst-instability ratio Abutment pressure
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