阻抗

Secondly, the relationship between the coil impedance and its liftoff for different materials are obtained using separation of variables and numerical calculation methods.

为考察电涡流传感器中等效电路的适用性，本文从被测体材料角度出发，在分析等效电路基础上，采用分离变量法和数值计算法，得到不同被测材料下探头线圈阻抗与提离高度的关系，并与从等效电路得出的结论比较，确定等效电路的适用性，同时考察被测体厚度对线圈阻抗的影响，最后对得出的结论进行理论分析。

Seams can be modeled in the EMC simulation software by this method. First, the thesis introduces the basic theories of shiel...

然后介绍了转移阻抗方法基本原理，并阐述了缝隙转移阻抗等效建模方法的具体含义及其等效原理，同时提出了等效缝隙模型中结构尺寸及材料属性的确定规则；最后通过仿真案例验证了该方法的准确性。

This circuit is more simple, convenient connectivity, the choice of its parameters with the speaker impedance has a direct relationship, and the speaker impedance is a function of frequency, with larger deviation from the nominal value, so the error is also large, is not conducive to adjust.

此电路较为简单，连接方便，它参数的选择与扬声器阻抗有直接的关系，而扬声器的阻抗又是频率的函数，与标称值偏离较大，因此误差也大，不利于调整。

The main factor affecting weld quality of spot welding is net voltage fluctuation and the change of secondary loop impedance.

影响点焊电流恒定输出的主要因素是网压波动和二次回路阻抗的变化，二次回路阻抗变化会导致负载功率因数角变化。

By analyzing the characteristics of the several common load harmonic sources, this paper inducted the resistance formulas, sequence resistance and sequence impedance matrixes of tri-phase universe loads, star and triangle connection loads under harmonics condition.

在分析几种常用负载谐波源特性的基础上，推导出了在谐波环境下三相通用负载、星形和三角形联结负载谐波源的阻抗计算公式、序阻抗和序导纳矩阵。

We can therefore refer to this statistical estimate taken from the evolutive impedance distribution as a 'stationary impedance' estimate.

因此，我们可以参考这个统计估计，采取从演化阻抗分布作为一个'静止阻抗估计。

In this condition, the parallel transformer can exhibit nearly zero impedance to harmonic current and very high primary self-impedance to fundamental current and thus lead harmonic current in power systems to flow into the transformer branch. With a step-down transformer, the power semiconductor switches of the active power filter are always worked in relatively low voltage, which ensure the security and reliability of the active filtering device.

实时检测并联变压器一次侧的谐波电流，根据谐波补偿条件，得到谐波补偿电流的指令信号，通过电力电子变流器跟踪产生谐波补偿电流注入到二次侧补偿绕组中，使得并联变压器对谐波电流呈现近似为零的低阻抗，对基波电流呈现很大的一次侧自阻抗，从而输导系统中的谐波电流流入并联变压器支路。

Using linear network characteristic, theorem and variable structure and variable parameter,nodal current sources and impedance matrix element can be changed, thus the universal model and algorithm is derived, just like short-circuit fault happened in each side of circuit breaker at different time.

同时，还能考虑各种不同的运行方式的影响。2变结构短路电流计算原理如图2所示，在有源网络N中，有一条支路，其阻抗为Zij，该支路阻抗取值只有下列两种情况：当Zij=0时，节点i与节点j合成一

To solve the problem, a method used to analyze the proximity effect in rectangular loss transmission line is proposed and applined in full transverse electromagnetic frecuency Additionally, AC resistances are calculated to correct the parameters in telegraphist's equation, so it is feasible to do transmission characteristics analysis in wide band.

针对传统磁准静态方法无法进行高频段邻近效应分析的缺陷，提出一种可适用于横电磁波下整个频段的矩形有损传输线邻近效应分析方法，并推导了邻近效应影响下的交流阻抗，进而对电报方程的阻抗参数进行修正，为宽频域信号传输特性分析提供了新思路。

The RF power of this oscillator is enough to sustain the CO discharge at pressure lower than 1 torr.

虽然在一般的情况下无法观察到光阻抗讯号，但在使用CO、N2及Ar的混合气体时可观察到光阻抗讯号。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。