Null-type yaw probe Research on inverse time current relay based on the absolute value of zero-sequence power 对零式(三孔)方向测针采用零序功率绝对值构成反时限零序电流保护的方案探讨
Flow diagrams of algorithm for inverse time current protection and instantaneous over current protection were given as well. 给出了长延时和瞬动二段保护的算法流程。
Underreaching protection extremely inverse current relay 继电器失灵保护装置反时限电流继电保护装置
The geochemical models have experienced the development from inverse modeling to forward modeling to current reactive solute transport modeling. 地球化学模型发展经历了从反向模拟到正向模拟,以及到现在的反应性溶质运移模拟的发展过程。
Simulation of Heat Transfer of Heat Recovery Boiler with Additional Out Vents Inverse time current protection is judged by calculating the RMS of current and adding up heating effect. 余热锅炉增设放散烟道后的传热数值计算长延时采用计算电流真有效值,累计热效应判别。
A Solution to Prevent Inverse Output Current in Buck Converter 低电流负载下Buck防止输出电流回流的一种方案
A new kind of frequency converting timing system of short phase shifting current mode circuit was introduced in view of the defects of inverse circuit of series wound diode current mode, which is widely adopted in frequency converting timing systems. 针对应用较为广泛的串联二级管式电流型逆变电路变频调速系统存在的缺点,提出一种新型的短路换相式电流型逆变电路。
Solving inverse problem of ECG current field using a combining method within a three dimensional thorax 应用结合方法求解三维胸腔电流场逆问题
The basic principle of inverse fitting of direct current sounding curve is expounded, and the transfer fnuction T(λ) of fitting resistivity and apparent resistivity function ρ_s ( r) are approached respectively in this paper. 文中阐述了直流电测深曲线反演拟合的基本原理,对拟合电阻率转换函数T(λ)和视电阻率函数ρs(r)分别进行了探讨。
An Algorithm and Simulation of the Inverse Problem of a Low-frequency Current Fild 低频电流场逆问题的一种算法及模拟
Two important examples are used to explain the forward problem and the inverse problem of eddy current NDE as well as some relevant theories and experimental methods. 本文通过两个重要实例,阐明涡流无损评价技术的正向问题和逆向问题以及一些有关的理论和实验方法。
The sensitive temperature characteristics of PN junction inverse saturation current is fully utilized to obtain good temperature coefficient and PSRR with simple circuit structure. 该技术充分利用了PN结反向饱和电流是温度敏感函数的特性,使用简单的电路结构,达到了很好的温度特性和电源抑制性能。
The Analysis and Application of Trigger Rectification and Inverse Current 触发整流和逆变电路的分析及应用
New Results of Algebraic Reconstruction Techniques to Inverse Ring Current Ions Distribution 代数重建法反演环电流分布的初步结果
Theoretically EIT is an inverse problem of low frequency electric current field calculation, whose core is reconstruction algorithm. The reconstruction algorithm of EIT is not perfect so far, because it is very difficult in mathematics. EIT技术在理论上是一个电流场计算的逆问题,其核心是重建算法,但重建算法至今仍然没有得到很好的解决,这是因为完善它的理论基础非常困难。
Taking the zero probability for β particles detection into account, it is shown that the count rate varies monotonously with the anode current and tends to the inverse anode current is approaching to zero. 考虑β粒子的零几率,计数率同时随阳极电流而改变,当阳极电流的倒数趋于零时,计数率趋干衰变率。
Mechanism of Inverse Current Leakage for CCD Output Diode CCD输出二极管反向漏电机理的研究
And then, the Radial Basis Function ( RBF) neural network is used to construct the inverse model of the eddy current sensor. The input output mapping is unity after the adding the RBF network. 为此,采用径向基函数网络建立涡流传感器逆模型,使加入逆模型后涡流传感器输入输出映射单位线性化。
Analysis of Inverse Current Impulse during Short Circuit Test Of Generator with Rectifier 整流型发电机短路测试中电流反冲现象分析
Anti-inverse charge of voltage current switching over 电压切换回路防止反充电
Analysis of inverse time zero-sequence current relay and its selectivity 对输电线反时限零序电流保护选择性的分析
Contactor control is used by three-phase load motor in electric power locomotive. Current quick-break protection, inverse time over current protection and single-phase grounding protection can be realized by single chip micro-computer. 电力机车三相负载电动机采用接触器控制方式,可用微型单片机同时实现电流速断、反时限过流及单相接地等保护。
Microcomputer based inverse time negative sequence current protection and fault recorder 微机反时限负序电流保护和事故追忆装置
The effects of pulse current, frequency, duty ratio and inverse current in zincate system on the appearance and corrosion resistance of zinc coating are investigated. 研究了在锌酸盐镀锌体系中采用脉冲电流时,脉冲频率、脉冲的占空比、反向电流对镀层外观、耐蚀性的影响。
The value N_1N_2/ N_0 calculated with Cox-Isham formula varies monotonously with the anode current, but the disintegration rate can be obtained with the extrapolation of N_1N_2/ N_0 as the inverse anode current is approaching to zero. 由Cox-Isham公式计算的N1N2/Ne随阳极电流而变化,当阳极电流的倒数趋于零时,外推N1N2/Ne求得衰变率。
Analysis of Inverse Time Lag Current Protection 反时限电流保护浅析
This paper carried on the detailed analysis of many algorithm including three-step current protection algorithm 、 inverse time zero sequence current protection algorithm and voltage protection algorithm, and gave the DSP programming flow chart. 并对包括三段式电流保护、反时限零序电流保护、电压保护等算法详细分析,给出了在实现DSP编程中流程图。
This thesis proposes a two-phase soft-start method, which lets the duty cycles of the active switch and passive switch increase slowly from zero in two successional phases of time, and thus prevents the inverse current effectively. 论文提出一种新颖的两段式软起动方法,它分两个阶段分别让主控管和被控管的占空比从零开始逐渐增加,有效防止反向电流的出现。
While increasing load, the output current will decrease and once it decreased to a critical value, inverse current appears, which seriously affect the transfer efficiency and should be avoid immediately. 而随着负载的加大,输出电流会逐渐减小,当小于一定临界值时,会出现电流回流进芯片的现象,这种现象严重影响了系统的转换效率,必须得到抑制。
A sensitive electrical characterization method of Schottky Barrier Characterization combining with Schottky Barrier Hight ( SBH) fitting and inverse current testing was also introduced to indirectly perceive the influences of copper through the diffusion barrier and NiSi layer on the interfacial characteristics. 引入了较为灵敏的肖特基势垒特性测试,结合肖特基势垒高度拟和和反向漏电流测试来观察Cu经过扩散阻挡层、NiSi后对界面特性的影响。