句子类型-教诲的近义词是什么

y there are a number of elements connected to the chassis, which is often then connected to the earth.

许多实际电路是建立在一个金属底座或底盘，通常有一连接到机箱，它经常被连接到大地的元素数。

The chassis may then be called ground,and it becomes the logical choice for the reference node.

底盘然后可以称为地面，并成为该参考节点的合理选择。

For this reason,the reference node is frequently referred to as ground.

由于这个原因，通常称为参考节点为基础。

The reference node is thus at ground potential or zero potential,and the other nodes may be considered to be at some potential above zero.

该参考节点因此，在地电位或零电位，与其他节点可能被认为是一些在零以上的潜力。







SECTION1

第一段

To say that we live in an age of electronics is an understatement.

如果说，我们生活在一个电子时代生活是轻描淡写。

Form the omnipresent integrated circuit to the equally omnipresent digital computer,we encounter electronic devices and systems on daily basis.

形成了无所不在的集成电路，电子计算机的同样无所不在，我们遇到了电子设备的日常基础和制度。

In every aspect of our increasingly technological society--whether it is science,engineering,medicine,music,maintenance,or even espionage--the role of electronics is large,and it is growing.

凡在我国越来越多的技术社会的方方面面 - 无论是科学，工程，医学，音乐，维修，甚至是间谍 - 电子技术的作用是很大，而越来越大。

第二段

In general, all of the tasks with which we shall be concerned can be classified as "signal-processing"tasks.

一般来说，与我们有关的所有任务，应可归类为 “ 信号处理 ” 的任务。

Let us explore the meaning of this term.

让我们探讨这个词的含义。

第三段

A signal is any physical variable whose magnitude or variation with time contains information.

一个信号是任何物理变量，它的大小或随时间变化包含的信息。

This information might involve speech and music ,as in radio broadcasting,a physical quantity such as the temperature of the air in a room,or numerical data ,such as the record of stock market transactions.

这些信息可能会涉及语音和音乐，如无线电广播，如在一个房间里的空气温度，或数字数据，如股票的市场交易记录，物理量。

The physical variable that can carry information in an electrical system are voltage and current.

物理变量，它可以携带在电力系统信息是电压和电流。

When we speak of "signals",therefore,we refer implicitly to voltages or currents.

当我们的 “ 信号 ” 说话，因此，我们指的电压或电流的含蓄。

However ,most of the concepts we discuss can be applied directl
y to systems with different information-carrying variables.

然而，我们讨论的概念大都可以直接应用到不同的信息系统进行变量。

Thus,the behavior of a mechanical system (in which force and velocity are the variables )or a hydraulic system (in which pressure and flow rate are the variables)can often be modeled or represented by an equivalent electrical system.

因此，机械系统（在这种力量和速度是变量）或液压系统（在这种压力和流量是变量）的行为往往可以模拟或等效电气系统的代表。

An understanding of the behavior of electrical systems,therefore,provides a basis for understanding a much broader range of phenomena.

作者：电力系统行为的理解，因此，提供了一个了解的现象更广泛范围的基础。









CHAPTER7

第一段

The steady-state operation of a power system is frequently disturbed by various faults on electrical equipment.

一个电力系统稳态运行经常感到不安的是电气设备的各种故障。

To maintain the proper operation of the power system ,an effective efficient and reliable protection scheme is required .

为了维持电力系统正常运行，有效的高效率和可靠的保障计划是必需的。

Power system components are designed to operate under normal operating conditions.

电力系统组件的设计运行在正常的操作条件。

However,if due to any reason,say a fault,there is an abnormality,it is necessary that there should be a device which senses these abnormal conditions and if so,the element or component where such an abnormality has taken place is removed,i.e. deleted from the rest of the system as soon as possible.

但是，如果由于某种原因，比如说一个故障，有一个异常，这是必要的，应该有一个可以感应这些不正常的情况，如果是这样，如该元素或成分已经发生的异常被删除，即设备删除从尽快系统的其余部分。

This is necessary because the power system component can never be designed to withstand the worst possible conditions due to the fact that this will make the whole system highly uneconomical.

这是必要的，因为电力系统的组件可以永远能承受最糟糕的原因在于这会令整个系统非常不经济的可能条件。

And therefore,if such an abnormality takes place in any element or component of the power system network ,it is desirable that the affected element / component is removed from the rest of the system reliably and quickly in order to restore power in the remaining system under the normal condition as soon as possible.

因此，如果这种异常发生在任何元素或者电力系统的网络组件的地方，这是可取的，受影响的元素 / 组件删除从系统的其余部分，并迅速可靠，以恢复在其余下的系统电源为尽快正常状态。



第二段

The protection sc
heme includes both the protective relays and switching circuits, i.e. circuit breakers.

该保障计划包括保护继电器和开关电路，即断路器。

The protective relay which functions as a brain is a very important component.

保护继电器的功能，作为大脑是一个非常重要的组成部分。

The protective relay is a sensing device, which senses the fault, determines its location and then send command to the proper circuit breaker by closing its trip coil.

保护继电器是一个传感装置，可以感应故障，确定其位置，然后发送命令关闭其脱扣线圈到正确的断路器。

The circuit breaker after getting command from the protective relay, disconnects only the faulted element.

后得到命令从保护继电器断路器，只有断开故障因素。

This is why the protective relay must be reliable , maintainable and fast in operation.

这就是为什么保护继电器必须是可靠的，易于维护，操作快捷。

第三段

In early days, there used to be electromechanical relay of induction disk-type.

在早期的日子里，曾经是感应盘型机电式继电器。

However,very soon the disk was replaced by inverted cup, i.e. hollow cylinder and the new relay obtained was known as an induction cup or induction cylinder relay.

然而，很快的磁盘取代了倒杯，即空心圆柱和获得新的继电器作为一个感应或感应缸杯接力而闻名。

This relay, which is still in use,possesses several important features such as higher speed,higher torque for a given power input and more uniform torque.

该继电器，它仍然在使用，如具有较高的速度，更高的转矩给定的输入功率和扭矩更均匀的几个重要特点。

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