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In South China where lightning is rather active, the tripouts of UHV transmission lines, which are caused by the failure of lightning shielding , frequently occur, so it is necessary to research the lightning shielding performance of UHV transmission line in depth.

雷害是输电线路故障的主要原因，在我国南方多雷地区，超高压输电线路频繁发生雷电屏蔽失效引起的跳闸，有必要更深入地研究超高压输电线路的雷电屏蔽性能。

In this paper, the line blocking situation, the exchange of optimal power flow analysis of the circuit system, each node under congestion pricing, as well as trends such as changes in the slip road was completed in the Matlab environment to the IEEE14 bus system route blockage occurs in case of simulation and data analysis and achieved good results.

本文针对线路的阻塞情况，用交流最优潮流分析了线路阻塞情况下系统各节点电价以及支路潮流等变化，完成了在Matlab环境下对IEEE14节点系统发生线路阻塞情况下的仿真和数据分析，取得了较好的效果。

The direction of a spiker 's approach to a set ball and the imaginary path of the spike across the net if hit in the same line as the approach angle .

如果攻手的击球线路和其进攻跑动线路一致，那么其跑动线路的方向就称为进攻角度。

Nevertheless , in Chinese railway , there is a shortage of applying heavy duty maintenance machine to conduct the track major repaair for so long time , which resulted in track mudding and hardening .

但是，由于我国长期以来一直缺少大型线路养护机械进行线路的大修作业，使目前国内大量线路处于长年失修、翻浆冒泥和严重板结的状况。

Include the following types:(1) check value car, for the railway Vehicles weighing, the actual track is a kind of moving in large weights;(2) Power generation car, the car has a small power station, they can always call on the railway line on the power supply;(3) gauge inspection vehicles, for inspection and verification of railway bridges, tunnels and other large buildings close to the limits in order to determine the safety of vehicles;(4) test cars were equipped with test equipment, used to measure and record rolling stock and railway line performance parameters;( 5) The rescue vehicles, for the train accident occurs, clear the line obstructions and incidents from re-rolling stock;(6) LTL office vehicles for the LTL freight train crew members, escort personnel work and rest;(7) Ballast cars transport and shop for the construction of lines unloading ballast;(8) long rail vehicles for the transport of long rail or recycle that old rail;(9) snow vehicles, clear the rail line, the snow outside.

包括以下几种类型：（1）检衡车，供铁路车辆称重用，实际是一种可在轨道上移动的大砝码；（2）发电车，车内设有小型电站，可随时调用于铁路线路上供电；（3）限界检查车，用于检查和核对铁路桥梁、隧道等大型建筑物的接近限界，以确定车辆通过的安全性；（4）试验车，车上装有试验设备，用于测量和记录机车车辆和铁路线路的性能参数；（5）救援车，用于列车运行发生事故时，清除线路障碍物和起复事故机车车辆；（6）零担办公车，供零担货物列车乘务人员、押运人员工作和休息；（7）石碴车，用于修建线路运送和铺卸石碴；（8）长钢轨车，用于载运长钢轨或回收旧钢轨；（9）除雪车，清除线路钢轨内、外侧积雪。

Through discussing further the reflective and refractive coefficients of line boundary, the features of line boundary are as follows: the attenuation of high frequency band (especially in band of line trap) of transient components generated by fault through line boundary is obvious, whereas the low frequency band (1~10kHz) components are hardly influenced. Moreover, the transient components below 100kHz should be adopted in purpose of outstanding the line boundary and weakening the transmission influence of transmission line.

通过对线路边界的透、反射系数的进一步分析发现：暂态信号的高频段穿越线路边界时将大为衰减，而低频段(1~10kHz)几乎不衰减；为弱化线路的传输影响而突出线路边界的作用，宜选用100kHz以下的信号分量。

That the transmission line system so that the progressive realization of the management of information technology, standardization, improved transmission line management level.

针对目前传统的线路管理存在的问题，介绍了大理供电局输电线路地理信息系统的开发方案、系统功能及应用，指出该系统使输电线路的管理逐步实现信息化、标准化，提高了输电线路的管理水平。

Conductor and ground wire splicing reinforcing bar can reinforce splice sleeves.During line maintenance and emergency repair,it can be used to fix the point of splice sleeve failure conveniently and quickly.

输电线路导、地线接续管补强接续条可以对线路的接续管进行补强，接续管补强接续条在输电线路的维护、抢修时，可方便、快捷地对接续管故障点进行补修。

At first, an outer surface electric intensity integral equation, involving the resistive coupling of earth, is put forward for the buried finite-length conductor segment.

本文研究通信线路附近存在金属导体系统时，电力线路对通信线路的电磁危险影响问题，本文研究内容和结果如下： 1。

It is competently used in distribution circuits of AC380V, 50Hz,or 60Hz,for power distribution and protection of circuits and electrical equipment from overload, undervoltage and shortcircuit, as well as for non-frequent switching under normal working conditions.

H系列塑料外壳断路器，80年代从美国西屋引进，该断路器结构新颖，性能可靠，附件齐全，分断能力高，适用于交流50Hz，或60Hz380V及以下的配电线路中，作为分配电能和保护线路及电源设备免受过载，欠电压和短路危害以及在正常工作条件下作为线路的不频繁转换之用。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。