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single-phase
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  single-phase
The single-phase SmCoO3 changes from an insulator to a semi-conductor and transition occurs around 470 K.
      
The thermal expansion coefficient (2.17 × 10-5 K-1) of the single-phase SmCoO3 is approximately equal to that of doped LaGaO3, but much bigger than that of SDC(Ce0.85Sm0.15O2) above 873 K.
      
The result shows that structure size plays the most important role in mass flow distribution, and the influence of core power could be neglected under single-phase flow.
      
In the first part we consider a model of single-phase filtration of gas in gas-field developing; in the second, a model of two-phase filtration of oil and water, i.e., oil fields.
      
The density, isothermal compressibility, and thermal expansion coefficient of macroscopically single-phase n-heptane-water-sodium dodecyl sulfate-n-pentanol microemulsions are measured by a precision dilatometric method at 25°C.
      
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ID recent years the wide application of node impedance matrix method has proved itself as an effective tool in solving power system short circuit calculation problems (including zero sequence mutual induction effect) by electronic digital computers. This paper describes the fundamental concept of node impedance matrix and different methods to formate them.Special attention being paid to the topological method of matrix transformation. It further extends the application of node impedance method to solve simultaneous...

ID recent years the wide application of node impedance matrix method has proved itself as an effective tool in solving power system short circuit calculation problems (including zero sequence mutual induction effect) by electronic digital computers. This paper describes the fundamental concept of node impedance matrix and different methods to formate them.Special attention being paid to the topological method of matrix transformation. It further extends the application of node impedance method to solve simultaneous ground fault problems, single phase reclosing problems, transient stability calculations and loss coefficient calculations. All programs hare been verified on electronic digital computers.

近年来,在数字计算机上应用结点阻抗矩阵法计算电力系统短路电流(包括零序互感)显示出快速精确的效果。本文就结点阻抗矩阵的概念以及形成方法进行一次探讨。文中着重分析了一种利用网络几何原理进行的矩阵变换法。此外,还介绍了将结点阻抗矩阵推广应用于电力系统其他计算问题(异相两点接地、动态稳定、单相重合阐以及线损系数等)中的一些经验。文中所介绍的方法均在数字机上经过了检验。

This paper presents an analysis and comparison of vaious types of single phase saturable reactors, recommends rational types of construction used in A. C. speed regulation system and derives an optimum-ratio of principal core dimensions. ,This paper also suggests a practical design method to attain minimum weight of the saturable reactor, and the application of that method when using known types of standard core stampings.

本文对单相饱和电抗器的各种结构进行了分析比较,推荐了在交流调速系就中使用的合理结构形式;推导出了铁心的两个主要尺寸h与c之间的最佳比值,并指出此值与结构形式有关。 从饱和电抗器的重量最小观点出发,本文提出了最小重量设计方法,并根据铁心的标准冲片系列提出了工程计算方法。

The specialized transformer, which converts from an A.C. single-phase high-voltage to a three-phase low-votage output, could be found wide application in the A.C. electrical railroad.

单-三相变压器是一种能将单相高压交流电变換为三相低压交流电输出的特种变压器,它在交流电气化铁道上有广阔的应用前途。本文是对该种变压器的电磁关系、分相原理、电压的自调性等问题进行了具体分析。在通过电磁关系复数方程数学推算之后,并用向量图直观地阐明了分相的电磁过程,借以得出“互感”在分相中的作用。

 
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