polarity reversal

Effect of Polarity Reversal of Electric Field on Soil Microbial Community

土壤电动修复中电极切换对土壤微生物群落的影响

Constraint on the polarity reversal of the earth 's magnetic field

地球磁场极性倒转的限制

Numerical Computation of Polarity Reversal Electric Field in the Converter Transformer Ending and Its Insulation Design

换流变压器端部极性反转电场的数值算法及其绝缘设计

This new concept gives a simple and clear explanation for the dynamic cause of geomagnetic polarity reversal .

这是一个新的思路，它给地磁极性倒转提出了一个简明的动力机制解释。

Thinking about the mechanism of geomagnetic polarity reversal

关于地球磁场极性反转机制的思索

Geomagnetic polarity reversal records and susceptibility variations of the laterite in South China

南方红土中的磁极倒转以及磁化率变动记录

Elongating the time of polarity reversal can reduce the field strength under polarity reversal .

延长极性反转时间可降低极性反转时的场强。

Nonlinear analysis of geomagnetic polarity reversal and Cretaceous normal superchron

地球磁极倒转与白垩纪超静磁带的非线性分析

Study on Electric Field Distribution of ± 800 kV Converting Transformer Bushing Outlet Terminal during Polarity Reversal Test

极性反转试验中，±800kV换流变压器套管尾部的电场分布研究

Theory , observation and application of the geomagnetic polarity reversal and secular variation , magnetostratigraphy ;

地磁场倒转和长期变的理论、观测和应用以及磁性地层学；

In the DC voltage and polarity reversal voltage under the action of electric field distribution in converter transformer is different from the common power transformer .

在直流电压和极性反转电压作用下的换流变压器内部电场分布规律不同于普通电力变压器，对其进行深入研究具有重要意义。

Compared to AC transmission power transformer , converter transformer not only to be under AC voltage effect , also under DC voltage and polarity reversal voltage effect .

相对于交流输电所用的电力变压器，换流变压器不仅承受交流电压的作用，还承受直流电压和极性反转电压的作用。

The magnetic polarity reversal polarity reversal record is often illustrated by means of a column with black and white intervals depicting the two polarity .

地磁板性反转纪录通常用代表两种极性的黑白间隔所组成的极性柱来表示。

However , in coaxial oil-paper combination insulation when the thickness of insulation exceeds a certain value the field strength within the pressboard under polarity reversal will increase instead .

但在同轴油纸复合绝缘中，当绝缘厚度超过一定值后，纸中极性反转场强反而增加。

At least in the Phanerozoic , the geomagnetic intensity and polarity reversal frequency show evident changes and contain alternating stages of activeness and of quiescence .

地磁场的强度和地磁极倒转频率在显生宙有明显变化，有高峰期和平静期。

The operating converter transformer not only withstands AC voltage , lightning impulse and switching overvoltage , but also withstands DC voltage , superimposed AC-DC voltage and polarity reversal voltage .

运行中的换流变压器除承受交流电压、雷电冲击和操作过电压外，还要承受直流、交流叠加直流及极性反转电压的作用。

Transient process and distribution of the electric field in converter transformer under polarity reversal are analyzed based on the space charge , the speciality of such a field in multi-dielectric insulation is demonstrated by an example .

本文基于界面空间电荷的观点，分析了极性反转时换流变压器绝缘电场的过渡过程和分布特征，并通过算例说明了多介质绝缘中极性反转电场的特殊性。

Get the actual model of the converter transformers in the insulation test voltage polarity reversal in the transient structural changes in the distribution of electric field for accurate converter transformer insulation structure for the design of useful applications conclusions .

得到了实际换流变压器模型在极性反转试验电压下绝缘结构中瞬态电场变化的分布规律，为准确进行换流变压器绝缘结构设计提供了可参考的应用性结论。

And impulse function was introduced into the input part of the state equation , to simulate the step change of boundary potential when a polarity reversal occurred . The strength of the impulse presents the variation of the step change .

同时为了模拟极性反转时边界电位发生的阶跃变化，在状态方程的输入项中引入冲激函数，冲击函数的强度代表了边界电位发生阶跃变化时的变化量。

During 121 ~ 83Ma it is a cause of occurring Cretaceous normal superchron that there is non-dynamic effect of a collision with a celestial body which bring a geomagnetic polarity reversal .

在121~83Ma期间，无外星撞击地球引起地磁极性倒转，可能是白垩纪超静磁带出现的原因之一。

The operating converter transformer ? not only withstands superimposed AC-DC voltage , but also subjected to various operative-over voltage , lightning impulse voltage and polarity reversal voltage effects , these will bring serious challenges to valve side winding insulation .

运行中的换流变压器除受到交直流叠加电压外，还要承受各种操作和雷电冲击过电压以及极性反转电压的作用，给阀侧绕组的绝缘带来严重挑战。

The results showed that using 20 Hz in frequency to carry out target-oriented processing can best reflect the seismic response to the gas-bearing bed , such as dim spot , plat spot , event downwarping , low-frequency effect and polarity reversal etc.

经分析，可以认为采用主频20Hz进行目标处理最能反映气层地震响应特征，如暗点、平点、同相轴下弯、低频效应和极性反转等。

Converter transformer is weak link in the process of the long-distance DC transmission system , compared to the ordinary transformer , it has to bear the DC voltage and polarity reversal voltage , and other kinds of voltage , so some insulation problems are easy to generate .

换流变压器是远距离直流传输系统中的薄弱环节，因其与普通的变压器相比还要承受直流和极性反转等多种电压，所以更容易出现问题。

The intensity of palaeomagnetic field , the proportion and frequency of palaeomagnetic polarity reversal , and the rate of true polar wandering may display the periodic changes in the geological history and are closely related to the opening and closing , and may be restricted to the global factors .

古地磁场强度、古地磁场极性倒转比例、古地磁场极性倒转频率和真极移速率在地史上均呈周期变化，与开合构造关系密切，同受全球性因素制约。

The amplifier , which consists of an OPA and precisely matched resisters , is the key part of Subscriber Line Interface Circuits ( SLIC ) . The circuit includes battery feed and voice signal transmission functions and can enable SLIC polarity reversal and programmable SLIC AC impedance functions .

该电流放大器是用户线接口电路（SLIC）的关键部分，它由运算放大器和精密匹配的电阻组成，能较好地实现馈电和语音信号传输功能，易于SLIC实现极性反转和用户线交流阻抗调整。

Detection Performance of Digital Polarity Sampled Phase Reversal Coded Pulse Compressors

极性采样倒相编码数字脉冲压缩处理器的检测性能

Random of reversal geomagnetic polarity has the self-reversion characteristic of chaos and Chaos theory gives a simple and clear explanation for the dynamic cause of geomagnetic polarity reversal .

地球磁场极性的随机倒转具有混沌运动的自逆转特性，混沌理论给地磁极性倒转提出了一个简明的动力机制解释。