线路

There are two main disadvantages in the present differential algebra equation model used in AC/DC system: one is that 'dimensional calamity' can occur with the increment of DC transmission lines

目前普遍使用的AC/DC系统的微分代数模型主要存在2大缺陷：①随着直流线路的增加可能出现"维数灾难"问题

There are two main disadvantages in the present differential algebra equation model used in AC/DC system: one is that 'dimensional calamity' can occur with the increment of DC transmission lines; another is that it is difficult to deal with the switch of DC control mode.

目前普遍使用的AC/DC系统的微分代数模型主要存在2大缺陷：①随着直流线路的增加可能出现"维数灾难"问题；②不易处理直流控制方式的切换，计算繁杂。

The main contents of this thesis are:(1) The new phase segregated current differential protection based on distributed parameter is proposed. The new protection can calculate the current at the fault point in real time, so its performance is hardly affected by distributed capacitance of transmission line.

本论文主要内容包括以下几个方面：(1)提出了基于分布参数的分相电流差动保护新原理，该原理本质在于实时计算线路的故障点电流，因此其性能基本不受分布电容的影响。

The digit phase locking circuit adopted in the plan not only made the electric circuit very simple and reliable,but also rendered the frequency standard free from the temperature coefficient of electric circuit.

该方案采用数字锁相环路，使电路十分简单且工作可靠，又不会给频标带来电子线路上的温度系数。

Circuit principles, analogue circuit, digit circuit which laid me a solid foundation of circuit for the study of communication; the study of electronic circuit of communication provided me with the working principles of analog communication system; the study on communication theory made me grasp the working methods of digital communication; the study on electromagnetic field, electromagnetic wave and aerial let me know that how signals travel through signal paths and how to apply signal and linear system, random signal and system to the research of noise's impact on signals

学习了电路原理、模拟电路、数字电路打下了学习通信的电路基础；学习了通信电子线路掌握了模拟通信系统的工作原理；学习了通信原理掌握了数字通信的工作方法；学习了电磁场与电磁波、微波与天线了解了信号如何在信道中传输；学习了信号与线性系统和随机信号与系统来研究噪声对信号的影响。

This dissertation is devoted in the study of the new principles of digital protection for HV transmission line.

探索新的保护原理和方法，以提高输电线路保护的性能，是继电保。。。

The state of the discrete input lines is transmitted back to the controller unit.

离散输入线路的状态被传回控制器单元。

At last, the data obtained in the experiments are analyzed using fuzzy mathematics tools, and results prove that the capacitance between discharge and flashover can be calculated by the acoustic signal and fuzzy discursion is very effectual. It indicated that we offered the detecting way not only being able to be used to carry out online detecting on the insulator, but also making correct judgement to the contamination level of insulator.

通过对模糊推理的深入研究以及对高电压线路绝缘子污秽放电特点的细致分析，发现模糊推理的方法对绝缘子污秽试验数据分析和处理十分有效，通过声信号可以定量地判断出此时距离发生污闪的裕度大小，这说明文中提供的声学检测法不仅能够用来对绝缘子进行在线检测，而且还能正确判断绝缘子污秽程度。

How to use the spared throughput is worthy of studying,because of the disproportion of passenger flow in different time periods.

由于各时段不均衡客流的存在，非高峰期线路余能的利用是一个值得研究的问题。

In this paper,the GIS application in alarm system monitoring power line distaff is introduced,inclding the system design scheme,and how to implement the GIS by using the MapX control .

介绍输电线路拉线防盗告警系统中的GIS应用，以及用 MapX控件来实现系统中的GIS功能。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。