电流

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。

This text has analyzed the common malfunction of the asynchronous motor at first. And then it, which is based on symmetrical weight theory, has drawn accurate criterion of the trouble of the motor, confirmed the protective measures of different troubles. Finally, it has realized kinds of protection functions, such as short-circuit protection, rotate-stop protection, over-heat protection, negative current protection, zero current protection, low-voltage protection, over-voltage protection, overlong start-up time protection, frequent start-up protection, lock protection of electric leakage and so on.

本文首先分析了异步电动机的常见故障，以对称分量法为依据，采用检测过流幅值、负序电流、零序电流的方法，得出了电动机故障的准确判据，确定了各种故障的保护措施，对电动机实现了短路、堵转、过热、负序电流、零序电流、低电压、过电压、启动时间过长、频繁启动、漏电闭锁等保护功能。

Based on measured data,we advance the viewpoint that the interface trap has current conductive property besides being charged up, and the conduction is assumed to be the generation or recombination current caused by new interface traps, which can not be simply identified quantitatively from the I - V curve.

根据所测数据，明确提出了有自退火效应样品的新增界面陷阱除了电荷效应外还具有传导电流能力的观点，初步认为该电流是表面费米能级和陷阱能级相互作用导致的产生复合电流，该电流不能简单地从 I - V 曲线上定量分

The functions of the differential current sensor with magnetic modulation are analyzed when applied to the high voltage cabinet of A type metro vehicle .

分析了磁调制式差动电流传感器在A型地铁车辆高压柜电路中的功能，阐述了高导磁环形镍铁合金铁心线圈构成的差动电流传感器的电路原理，并简要介绍了该差动电流传感器的外形结构和材料特点，列出了传感器的主要技术参数，运用证明该差动电流传感器工作性能可靠、稳定。

The way to improving throwing power: the suitably high current density, polarization curve is the fine way to find suitably high current density.

解决镀层延展性的方法：尽量高的的电流密度，不高于极限电流密度。寻找尽量高的电流密度方法：测量极化曲线，从中找出极限电流密度。

The way to improving throwing power: the suitably low current density, about 1/3 limited current density; high ratio of sulfuric acid to sulfate copper.

解决深镀能力的方法：适当低的电流密度，即1/3极限电流密度大小；高酸低铜配比；寻找适当低电流密度和极限电流密度的方法：极化曲线方法。

Surge current: 10 x 8/20 s wave in total; AC current: 10 x 1 s /50 Hz in total 2 Nominal DC spark-over voltage

浪涌电流：10 x 8/20 s总电流波；工频电流：10 x 1 s /50 Hz 总电流 2 标称直流击穿电压

Considering the skin effect and skin depth, a thin wall model and a thick wall model are derived creatively with different frequencies of discharge currents, which are used to study the relation between the spark location and the potential difference for a cuboid electrode.

本文从放电电流为任意函数入手，阐述了电极电位差法的检测原理，首次利用傅立叶级数推导了电位差与放电时间的关系，证明了放电电流为阶跃函数时，电位差与放电时间成指数关系；当放电电流中含有高频振荡时，电位差与放电时间的关系为指数曲线上叠加相移后的高频振荡；根据放电电流频率的不同，考虑到趋肤效应和趋肤深度，首创了薄壁模型和厚壁模型，研究了长方体电极下表面二维放电点位置与电位差的关系。

The result shows that to improve the anodic current efficiency, we should decrease the reactions in the anodic solution between dissolving chlorine and transferring sodium hydrate and reduce a series of the reactions between the anode and the cathode.

本论文首先阐述了氯碱工业生产技术发展历史，并介绍离子膜法电解产生、发展过程以及其发展方向，考察了影响电流效率的各种因素，并提出提高电流效率的措施，得出要提高阳极电流效率，就要尽量减少在阳极液中产生的溶解氯与迁移烧碱之间发生的副反应，减少阳极上氧的析出量；要提高碱的电流效率，就要尽量减少氢氧根离子向阳极室的反渗。

At first the current sampling values pass through virtual digital CVTs. And then the voltage and current sampling values are processed by a low pass filter. According to the instantaneous value of transmission line voltage, the current instantaneous values of shunt reactors and P equivalent circuit capacitance can be calculated. After removing these two kinds of current, sampling value differential protection based on all components and fault component can be applied.

由线路电压瞬时值分别实时计算出流入并联电抗器和流入线路Π型等值电路两侧电容的电流瞬时值，再从线路每侧电流除去这两部分电流，用得到的新电流瞬时值作常规采样值差动和故障分量采样值差动保护计算。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。