计算电路

Based on the theory of uniform transmission line and four-terminal net circuit, this paper presents a simulation model of ZPW-2000 jointless track circuit shunt current. A kind of numerical algorithm of shunt current is established with MATLAB.

运用均匀传输线和电路四端网理论，建立了ZPW-2000无绝缘轨道电路分路电流的计算模型，利用MATLAB软件实现了分路电流的数值算法。

ABSTRACT Analysis of the time-domain response of multiconductor transmission lines is important for the design of interconnects in high-speed integrated circuits, in electrical power distribution systems, and in electromagnetic pulse investigations.

高速电路中的连接线通常是由多导体传输线构成，其时域响应的分析对高速电路系统的总体性能指标的保证及系统的设计关系极为重要，同时其理论和计算方法也可用于电力传输系统中的瞬态分析及电磁脉冲的研究等多个领域。

The result is a largely nonmathematical treatment that encourages circuit intuition, brainstorming, and simplified calculations of circuit values and performance.

这样就产生了一种鼓励对电路的直觉、发散思维以及电路参数和性能简化计算，主要采用非数学手段的方法。

By sampling echo signal demodulated and A/D transform, sampling value is transmitted to SCM for compare, division, calculation, and exporting gain code to control signal range; furthermore controlling the AGC circuit, realizing amplification control to echo signal, consequently stabilitate the signal range in a window for the later circuit.

通过对检波后的回波信号进行采样，经过A/D变换，采样值送入单片机内部进行比较、判别、计算，然后输出可控制信号幅度的增益码去控制AGC电路的受控级，实现对回波信号的增益控制，从而使得输出信号幅值稳定在一个窗口内，供后续电路处理。

Firstly, the antenna's equivalent circuit and quality factor will be calculated, then the capacitance value of matching circuit can be worked out.

匹配电路设计首先需测出天线的等效电路，再计算出天线的品质因子，然后得出匹配电路的电容值。

This action of charging the capacitor is shown in the following equation: ADC Clock resistor RSW 式决定的:(1 K ) and RIN for the period S1 is closed; this period is controlled by ACQ_PS setting.

时间。然而这个时间远远大于外部的电阻和电容电路所消耗的时间，同时在计算电阻和电容电路时候的时间常数时，要考虑到外在附加的贴片电容和插针电容，对ACQ_PS 是一个非常高的值，而系统需要低采样频率。

At first, I collect and analyze the relative dates, and statistics fault models. Then I finish the analysis from three aspects, instruction of circuit, stress of surrounding, and tolerance, thus providing basis of design. The following designs are in progress from four aspects, which are circuit design, thermal design, derating using and screening. At last, I make the update generator in batch process, and collect and analyze reliability dates again. I proved that the life of the improved HF electrodless light is over to 60,000 hours.

首先进行了与可靠性相关的数据收集与分析，对故障模式进行统计；然后从电路结构、环境应力及容差三个方面进行可靠性分析，从而为关键的可靠性设计提供了依据；接下来的可靠性设计，从电路设计、热设计、降额使用、筛选四个方面逐一解决了可靠性分析阶段发现的问题；最后，我将改良的发生器批量生产，并从中重新收集了可靠性数据进行计算，事实证明改良后高频无极灯的平均寿命已达到6万小时。

Other conclusion include: the trip of transient protection must be locked when the power circuit breaker of transimission line operated,because the trip is incorrect at this time;the features of transient current and its energy is different between the fault and thunder over- voltage in transimission line,and them can be identified;the ratio of high frequency component of current in serise capaciters compensation line , SVC and HVDC system is far little than fault transient current, so all of them do not affect the working of trasient current protection.

研究了在串联补偿电容的输电线路上发生故障时，串联补偿电容的MOV非线性保护电路对暂态保护的影响。串补电容MOV保护电路的非线性电流高频分量含量很小。静止补偿器、高压直流输电系统换流器的非线性特性产生的谐波分量含量极少。仿真计算表明，在与暂态保护判据中高频分量对应的频率范围内，其电流对应的功率谱估计值大大低于线路故障时故障电流的功率谱估计值，因此它们都不会对暂态电流保护的正常工作产生影响。

By using the way of equivalent transforming which uses resistor Y connection and triangular connection and the way of equipotential point equivalently transform the same one symmetric linear resistor circuits.

通过用电阻星形联接与三角形联接等效变换法和等电位点变换法对同一对称线性电阻电路进行等效变换，可以发现，在对对称性电阻电路进行等效变换时，等电位点变换法可使等效变换过程和等效变换计算都大为简化。

Therefore at low temperature, the fluctuations of charge and current in the RLC circuit are quantum mechanical effects, which is a quantum phenomenon originating from fluctuations of zero point vibration of the system.

在给出了介观RLC电路的动力学运动方程的基础上，计算了电路中电荷和电流的量子涨落，并研究了温度对量子涨落的影响。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。