查询词典 dielectric current

In Chapter 2,the polarization and loss mechanism of fruit in the alternating current arestudied,and dielectric parameters such as dielectric constant、equivalent impedance andequivalent capacitance are put forward to analyze the interaction between fruit internalquality and alternating current.

第二章 研究了水果生物介质在交变电场作用下的极化和损耗机制，提出了复介电常数、等效阻抗及等效电容几个相互联系又有所区别的电特性参数是研究交变电场与水果相互作用的基本参数。

The relations of inducing skin current of shielding layer, core voltage and core current with the environment field were obtained. The change of shield layer current wave with grounding state of external shield and core voltage with loading resistance was analyzed. According to the dependence of shield layer current oscillating frequency on electromagnetic wave propagation velocity, conception of transporting line of shield layer-ground with equivalent relative dielectric constant was presented. fited equation of equivalent relative dielectric constant with change of cable height was given.

试验得到九芯电缆屏蔽层感应电流、芯线感应电压、芯线感应电流以及环境场之间的关系；分析了皮电流波形随外皮接地状态的变化，芯电压随负载电阻的变化；基于皮电流振荡频率与电磁波传播速度的关系，提出了屏蔽层-大地"传输线"等效相对介电常数概念，给出了等效相对介电常数随电缆高度变化的拟合式；皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。

Mathematics model of dielectric under uniform electric field is built up, and total current is separated into three parts such as conductive current, instantaneous current and relaxation polarization current, then polarization and depolarization of linear and non-linear dielectric are simulated under step excitation, the results show that nonlinearity of non-linear conductivity is reflected by measuring surface potential attenuation during the process of self-discharge of non-linear dielectric.

论文首先对处于均匀电场下的电介质进行电路建模，把电介质的总电流分为电导电流、位移极化电流和松弛极化电流三部分来分析，然后以此为基础利用Matlab软件中的Simulink平台对直流阶跃激励下线性和非线性绝缘介质的极化和退极化过程进行了仿真，结果表明可以通过测试非线性绝缘介质自放电过程的表面电位衰减来反映其非线性电导的非线性程度信息。

In order to make clear the phenomenon of current zero in the arc-quenching chamber of deion plates, the process of dielectric recovery and reignition of short arc between iron plates is investigated, and then the dielectric recovery strengths of various chambers are measured and compared. The different characteristics near current zero in the deion plate chambers are also analyzed based on experiments in the paper.

为弄清栅片灭弧室内电弧电流的过零过程，专门研究了不同条件下栅片间低压短弧的介质强度恢复过程和电弧重燃过程，然后测量了多纵缝和栅片灭弧室的介质恢复强度，对比了它们的熄弧性能，在试验的基础上，分析了栅片灭弧室中电弧电流的过零特征。

Recently, much attention has been paid to an unusual material CaCu_3Ti_4O_(12) because of its giant dielectric constant , The current study focus on the origin of the giant dielectric, however, its little high dielectric loss limits application, how to reduc.

近年来具有巨介电常数材料的CaCu_3Ti_4O_(12)引起了人们很大的关注，目前研究主要集中在CCTO巨介电常数的来源问题，但其较大的介电损耗限制了应用，对如何降低其介电损耗的研究很少。

Aiming at the shortage of measuring mechanism for electrical equipment fault caused by dielectric in current electrical power system,the authors analyze the measurement theory for dielectric loss,propose an on-line measurement system for dielectric loss based on the single chip,and use LMS adaptive filtering algorithm in the design system.

针对目前电力系统中因绝缘材料造成的电气设备故障检修机制的不足，本文作者在分析介质损耗测量原理的基础之上，提出了基于单片机的绝缘介质损耗在线测量系统，设计中采用LMS类自适应滤波算法。

Circular electric current is a classical physical model. The researches on the magnetic field distribution characteristics of the circular current are helpful for the further study on magnetic characteristics of magnetic dielectric. The ellipse electric current is a typical physical model of ring-like electric current. The researches on the magnetic field distribution of it make us obtain more understandings of magnetic problem of ring-like electric current.

圆电流是一个经典的物理模型，对圆电流磁场分布特性的研究有助于进一步研究磁介质的磁性特征；而椭圆形电流又是环形电流中一个典型的物理模型，对椭圆形电流磁场分布情况的研究，将让我们进一步认识环形电流的磁场问题。

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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。