查询词典 overhead line

In using the FDTD method to research the transient process of the overhead line, for the convenience of the time domain convolution, the Vector Fitting method is adopted to expend the frequency domain form of ground return impedance into a sum of finite exponential functions which are easy to be treated and test to be valid.

提出了应用矢量匹配法逼近传输线频变阻抗的时域处理方法，从而解决了时域有限差分法难以处理频变问题的困难。

In addition,theprecondition of valid protection in the substation is discussed,only with the lightning arrester at the overhead-line entrance.

另外还对在哪些条件下可仅在线路入口处装避雷器即可对整个变电站内的雷电过电压提供有效保护进行了探讨。

Combine with the analysis of the effect that caused by the shielding of topography and the conditions when lightning occurred on the top of the transmission tower, this paper bring forward a synthetical scheme that on the AnNan overhead transmission line, can use long life resistance reducer to reduce the ground resistance of the transmission tower,set up a shielding pull- line on the body of some tower,set up lightning arrester and take unbalance insulated method to improve the level of the line's ability of preventing lightning.

结合地面屏蔽效果分析和雷击杆塔塔顶情况分析，提出了在安南线采用降低杆塔冲击接地电阻、对部分杆塔塔身安装防雷拉线、加装线路避雷器、在双回路共架杆段采用不平衡绝缘配置等措施来提高安南线耐雷水平的综合方案。使用长效降阻剂，降低杆塔的接地电阻，这是提高线路耐雷水平、降低雷击跳闸率的有效措施。

Starting from the main meteorological factors impacting vibration of overhead line, the impact of conductor tension variety on self-damping feature of conductors is analyzed according to state equations of overhead line, and by use of energy balance principle the variation of vibration level is calculated and the vibration life under different meteorological conditions are obtained.

文章提出了一种基于短期测量数据评估线路全年振动状态和寿命的方法，从气象影响线路振动的主要因素出发，根据导线的状态方程分析导线因张力变化对导线自阻尼特性的影响，并采用功率平衡法计算出振动水平的变化，得到了不同气象条件下的振动寿命。

Analysis of Short Circuit Distribution as Dangerous Interference Source and the Calculation of Short Overhead Line Impedance .

危险影响源短路电流分布的分析和架空短线阻抗参数的计算。

Based on the hypothesis of Brands, this thesis presents two off-line electronic cash system applied to small payment: one is an off-line nondivisible electronic cash system with complete anonymity, and the other is an off-line nondivisible electronic cashsystem with repealed anonymity. The two systems can solve the bottleneck problem of bank server. Furthermore, based on the concept of virtual debit as well as the payment demand of pay-per-use electronic commerce and mobile commerce, this paper designs a micro-system NPAY, which can solve the problem of extra-consuming, greatly reduce the system communication overhead, and the consumer can anonymously consume.

基于Brands假设，设计了两个适用于小额支付的离线电子现金系统：一个是具有完全匿名性的离线不可分电子现金系统，另一个是可撤消匿名性的离线不可分电子现金系统，这两个系统都较好地解决了银行服务器的瓶颈问题；针对即付即用(pay-per-use)类型电子商务和移动商务的支付需求，基于&虚借记&的概念，设计了一个微支付系统NPAY，较好地解决了消费者超额消费问题，系统的通讯开销也大大减少，并且消费者可以匿名消费。

Can be used to test a variety of telephone cable, high-frequency communication cables and metal place on the open-circuit overhead line, short circuit, poor contact and other cabling problems.

可用于测试各种市话电缆、高频通信电缆及金属架空电缆上发生的开路、短路、接触不良等各种电缆故障。

Introduces several technologies such as overhead insulated cable、small scale iron tower and steel pipe pole to solve a difficult problem for modification of 10 kV overhead line.

提出了采用架空绝缘电缆、特殊设计的小型铁塔和钢管杆等几种技术，解决了10kV线路改造的难题。

Introduces several technologies such as overhead insulated cable、small scale iron tower and steel pipe pole to solve a difficult problem for modification of 10 kV overhead line.

随着太钢生产生活系统的发展，太钢东点，与普通环型预应力水泥杆一道完成架设山地区工业负荷和尖草坪地区民用负荷大量任务。

For high voltages,overhead-line construction is generally used with suspension-type insulators.Steel towers,called pylons,serve to carry the insulators,with each conductor suspended from the bottom of a group or string of insulator units.

对于高电压、overhead-line普遍采用的建设与suspension-type绝缘体塔塔钢铁、服务、叫的绝缘体，每个导体停赛的底部或串绝缘子单位组。

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。