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插入式静电传感器特性研究 被引量:3
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作者 阚哲 邵富群 +1 位作者 李成志 李庆华 《计量学报》 CSCD 北大核心 2011年第2期141-146,共6页
插入式静电传感器在测量气一固两相流参数和保证其传送安全方面有较好的应用。通过建立电极数学模型,讨论了插入式静电传感器电极的插入深度、空间滤波特性和空间灵敏度特性,得到固体颗粒位置对电极上感应电荷的影响情况、感应电极灵... 插入式静电传感器在测量气一固两相流参数和保证其传送安全方面有较好的应用。通过建立电极数学模型,讨论了插入式静电传感器电极的插入深度、空间滤波特性和空间灵敏度特性,得到固体颗粒位置对电极上感应电荷的影响情况、感应电极灵敏度分布规律和插入深度L与电极测量信号幅值之间关系。对于连续流动的固相颗粒,当插入式电极插入深度£为管道直径的1/2时为最佳尺寸,此时电极具有低通滤波特性。在利用电极数学模型对电极空间滤波特性理论推导的过程中获得了固相颗粒速度与测量信号截止频率的表达式。实测结果证实了电极的空间滤波特性和空间灵敏度特性。 展开更多
关键词 计量学 插入式静电传感器 气一固两相流 电极数学模型 空间滤波特性 空间灵敏度特性
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Based on the experimentation mathematical modeling and autoregulation realization for gas-collector pressure of coke furnace
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作者 WU Xiao-su JI Shi-ming XIE Xiao-guang 《Journal of Coal Science & Engineering(China)》 2010年第1期88-93,共6页
Technical process and pressure control system of coke furnace were introduced.The mathematical model based on experimental method of gas-collector pressure wasproposed.To a certain extent, it is more reliable and depe... Technical process and pressure control system of coke furnace were introduced.The mathematical model based on experimental method of gas-collector pressure wasproposed.To a certain extent, it is more reliable and dependable than mechanism method.Manufacturing process and experimental modeling can be finished at the same time, andfurthermore, the mathematical model can be established automatically.The realization algorithmof the total decoupling and on the line's modification for model value plays an importantrole in improving regulating quality.Finally, the DCS network structure to realizethe process was introduced.The control results show that the regulator can get reliableand robust performance. 展开更多
关键词 coke furnace gas-collector pressure mathematical model COUPLING
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Research on Common Grounding Electrode Technique in HVDC
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作者 Chenglian MA 《International Journal of Technology Management》 2015年第1期4-6,共3页
This paper discusses the characteristics of DC transmission common system ground electrode type and shared ground electrode, established the mathematical model of two circuit DC systems share ground electrode, analyze... This paper discusses the characteristics of DC transmission common system ground electrode type and shared ground electrode, established the mathematical model of two circuit DC systems share ground electrode, analyze effects of the shared loop ground DC transmission system electrode on the operation of HVDC system size under different operation modes, and compare with the independent ground electrode, ground electrode impact on environment under different operation mode, and the paper finally puts forward some solving measures for the influence of the shared ground electrode on the environment and public ground electrode effects on DC system operation problems. 展开更多
关键词 HVDC ground electrode line protection DC transmission system TRANSIENT
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