电流

The development process and statistical particularity of lightning discharge are presented.

介绍了雷电放电的发展过程和放电的统计特性，统计表明，17％的雷电流具有不大于1μs上升时间；90％的不大于8μs的上升时间；50％的雷电流波长约为（26～50）μs。

Note 2- in the presence of a lightning protection system the discharge current will be substantially higher and an assessment will lead to the choice of a higher rated discharge current for the SPD.

注2：有雷击防护系统的情形下，放电电流会明显较高，因而应选择更高额定放电电流的 SPD。

Produces the red flash under the computer F-V signal function which supple gently changes, in the start process electric current is smaller than the normal work electric current, the voltage imitates 20V to start gradually to elevate until 220V, completely has avoided to the photosource electricity impact; The digital electric circuit board installs the radiator, the light bulb service life may enhance above three times; Canada supposes the lightning protector, further enhances the lamp equipment the service life.

在电脑F-V讯号作用下产生柔和缓变的红色闪光，启动过程中的电流小于正常工作电流，电压从120V开始逐渐升高直到220V，完全避免了对光源的电冲击；数码电路板加装散热器，灯泡的使用寿命可以提高三倍以上；加设避雷装置，进一步提高灯器的使用寿命。

Another way to limit I〓 is using fault current limiters , which under normal operation have negligible influence on a power system, but in case of a fault will limit I〓 to several times of the normal current.

限制短路电流的另一方法是在电力系统中加入限流器，它在正常工作状态下对系统无影响，而当发生短路故障时，可以迅速将短路电流限制在额定值的几倍范围内。

It is an effective approach to ensure the non-exceeding of the breaking capacity of line breaker by adopting fault current limiter to restrain short-circuit current when the grid is in fault.

采用故障电流限制器来抑制电网故障时的短路电流是保证断路器遮断容量不致超限的有效方法。

Thermochemical Hole Burning memory uses the STM heating effect to induce a localized thermochemical decomposition of Charge Transfer Complexes, evolving the low-boiling point donor component and creating nanometer-sized holes on the crystal surface. In this thesis, we focus our research on the material synthesis and storage mechanism of THB memory.

热化学烧孔(Thermochemical Hole Burning，THB)技术是基于STM的超高密度信息存储技术，它利用STM针尖产生的隧道电流或场发射电流的焦耳热效应，诱导二元电荷转移复合物材料发生局域热化学气化分解反应，使低沸点组分从样品表面逸出，形成纳米尺度的信息孔。

The pivot of this rated is the microcomputer current protection of the low-voltage protection' current protection.

本设计的重点是电流保护中低压开关的微机电流保护部分。

The pivot of this rated is the microcomputer current protection ofthe low-voltage protection' current protection.

本设计的重点是电流保护中低压开关的微机电流保护部分。

The objective of design optimization for the current loop is to maximize the cross-over frequency. The results show the stability is improved and the capability of suppressing the switching noise is far better than the original. The objective of design optimization for the voltage loop is to minimize the gain of the line ripple voltage.As a result the bandwidth minishes obviously and optimization design excelles in restraining the ripple.

主电路以总体积最小为优化目标，优化结果表明电路的体积减少了0.5%；电流环以开环穿越频率最大为目标，优化结果表明电流环的稳定性能得到了改善，开关噪声抑制能力明显优于优化前的；电压环以线纹波电压增益最小为目标，优化结果表明电压环的带宽明显减小，纹波抑制能力远远优于优化前的。

In MVNn, the activation of muscarinic cholinergic receptors leads to a decrease in a voltage-insensitive K+ current,which corresponds to the leak K+ current.

在MVNn中，毒蕈碱引发的M受体去极化效应是由钾电导的减少所介导，并证明所抑制的离子电流是漏钾电流。

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。