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场强计算     
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  field strength calculation
     On the basis of the field strength test on radio train dispatching for electric railways in mountain areas, this paper provides a statistical analysis of fading margin, which is an importent parameter for field strength calculation and design, and puts forward the value of fading margin in the 450MHz frequency band, thus providing the basis for defining the fading margin of radio train dispatching.
     本文在山区电气化铁路无线列调场强测试的基础上,对场强计算、设计的重要参数之一——衰落储备进行统计分析,提出450MHz频段的衰落储备值。 为确定无线列调的衰落储备提供依据。
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     Beginning with the consideration on GSM/CDMA indoor signal distribution system design, it discusses and analyzes signal source, selecting principles and scheme for indoor signal distribution system, indoor coverage field strength calculation, co-construction of GSM/CDMA networks and issues on repeaters used for signal source.
     从GSM/CDMA室内分布系统的设计思路出发对信号源室内信号分布系统选取原则和方案室内,、、覆盖场强计算两网共建以及直放站作为信号源时应考、虑的相关问题进行了详细的论述和分析。
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  calculation of field intensity
     The problem of calculation of field intensity on charged or current-carrying surface is discussed with the help of symmetric and logic method, and the general conclusion about this problem is obtained.
     应用对称分析与逻辑推理方法讨论了荷电或载流界面处的场强计算问题,并给出了此类题的一般结论.
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  elecreical field intensity computation
     The BEM Elecreical Field Intensity Computation Problems of 3D Electrostatic Field Analysis
     三维静电场分析的边界元场强计算问题
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  electric field intensity computation
     THE BEM ELECTRIC FIELD INTENSITY COMPUTATION PROBLEMS OF 2D ELECTROSTATIC FIELD ANALYSIS
     二维静电场分析的边界元场强计算问题
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      field strength calculation
    Electron kinetics in a collision-dominated SiH4 rf plasma including self-consistent rf field strength calculation
          


    The streamer propagation in rod-plate air gap under positive impulse votage is studied with the aid of the Lichtenberg figure technique. On the area of study, external field criterion for sustaining streamer propegation is evaluated statistically and relationship between streamer voltage and break-down voltage is also found out. As a consequence, a partly empiric formular is founded and the break-down voltage of interest wilt be predicatable.The charge simulation method for the calculation of the electric field...

    The streamer propagation in rod-plate air gap under positive impulse votage is studied with the aid of the Lichtenberg figure technique. On the area of study, external field criterion for sustaining streamer propegation is evaluated statistically and relationship between streamer voltage and break-down voltage is also found out. As a consequence, a partly empiric formular is founded and the break-down voltage of interest wilt be predicatable.The charge simulation method for the calculation of the electric field intensity in the rod-plate gap is also briefly introduced.

    本文叙述了用电花图法研究棒——板间隙在正冲击电压下的流注发展规律。取得了在所研究的间隙形状和电压波形下流注发展的统计临界外场强判据;找出了流注电压与击穿电压之间的关系;应用上述结果所建立的公式,可以预测击穿电压。 为了进行外加场强的计算,文中还简介了用模拟电荷法计算棒——板间隙场强的方法。

    As an aid to the study of coupling microstrip structures,this paperanalyzes and computes the radial dependencc,along the dielectric subst-rate,of the magnetic field Green's function of a horizontaI magneticdipole.The analysis is based on the contour integration of the exactspectral Green's function.From the results it is observed that the rad-ial dependence can easily be approximated by the corresponding freespace Green's function with a small cerrection term.

    本文分析和计算了水平磁偶极子磁场格林函数沿着介质衬底方向的值。这个分析可以用于研究微带结构之间的耦合。本文的分析是基于精确的频谱域格林函数的线积分。根据所得的结果,可以看到场强的计算可以很容易用相应的自由空间格林函数加上一个修正项来得到。

    Illustrated by the design of electrode geometry of a SF6 gas circuit breaker, (220kV piston type), the automatic optimal algorithm using the simplex method in nonlinear programing is disscussed in connection with the finite element method, automatic element subdivision and optimal nodal relabeling introduced here help reduce the computer storage and the number of date prepared for caculation. This method can also be applied to the designing of other electric apparatus which has arbitrary boundary figuration...

    Illustrated by the design of electrode geometry of a SF6 gas circuit breaker, (220kV piston type), the automatic optimal algorithm using the simplex method in nonlinear programing is disscussed in connection with the finite element method, automatic element subdivision and optimal nodal relabeling introduced here help reduce the computer storage and the number of date prepared for caculation. This method can also be applied to the designing of other electric apparatus which has arbitrary boundary figuration and multi-dielectric field.

    本文以220千伏单压式定开距SF_6断路器为例,讨论了用非线性规划的单纯形法进行触头形状的自动优化设计问题。电位和场强的计算采用有限元素法。为解决有限元素法存在的准备数据工作量大、占用计算机内存多等困难,采用了元素自动细分和节点标号优化等措施。本文提出的元素细分后的编号方法,对多种介质和任意边界形状的问题都适用。本文所述的优化计算方法和框图,也可用于其它电气设备的优化设计。

     
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