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麦克斯韦

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However,there are also slow polarization effects,which can not be described using Maxwell's theory.For the description of both fast and slow polarizations,a concept of boundary screen charges is introduced to avoid the complex electric displacement in dielectrics.Using quantum statistics,the excitation theory of screen charges can explain many properties of electrets and ferroelectrics.

慢极化效应使电介质的极化偏离了麦克斯韦方程组描述的规律,引入边界屏蔽电荷的概念来描述介质的极化过程,可以回避电介质内部复杂的电位移运动,从而能用屏蔽电荷激发的量子统计理论来说明驻极体和铁电体的许多性质。

From research,It is known that the flux of single-phase transformer would offset and exciting current of single-phase transformer would be distorted under DC current inrushing.

直流电流通过两个Y0连接的变压器中性点侵入电力系统,故针对三相三柱变压器直流入侵情况建立了直流入侵下的三相三柱变压器的电路模型和相应的方程,结合三柱磁路的麦克斯韦方程和非线性的B—H曲线方程,利用数字迭代法,在MATLAB环境下编程计算了三相三柱变压器直流入侵下的变压器励磁电流和谐波特征。

We deduce the basic differential equation of light spreading in photonic crystal and the theory of one dimensional optical transfer matrix from the Maxwell's equation in chapter Ⅱ.

第二章从麦克斯韦方程出发,推导了光在光子晶体中传播的基本微分方程和一维光学传输矩阵理论。

"Parents need to model good relationships for their children," Maxwell says.

&家长需要模型的良好关系,为他们的子女,&麦克斯韦说。

The waveguide propagation condition and analytical methods are deduced from Maxwells equations.

麦克斯韦电磁方程组出发阐述了光波导的传输条件和理论分析方法。

Firstly, the basic principle of Finite-Difference Time-Domain is introduced and the 2-dimensional FDTD equation is derived from the Maxwells equations, calculated by setting up the appropriate excitation source, cell size, the interval of space and time.

首先,介绍了时域有限差分法的基本原理,从麦克斯韦方程出发,建立二维空间中的时域有限差分方程,通过设置合适的激励源、网格尺寸、空间和时间步长进行计算。

To investigate the detecting capability of GPR in the dispersive medium, we propose a Finite Difference Time Domain method to solve Maxwells equations. We give an iterative method for calculation of the electrical displacement and magnetic fields in the Debye medium, and a method to compute the electric field from electrical displacement.

为了研究地质雷达在频散介质中的探测能力,提出了频散介质中时间域有限差分法计算麦克斯韦方程的方法,给出了满足Debye关系的频散介质中的电位移和磁场的迭代算法,以及由电位移计算电场的算法。

In this paper, by means of finding the solutions of Maxwells equitions which have a tensor dielectric permittivity,the wave equitions were obtained in rotation dielectric under the condition of longitudinal direct current magnetic field.

本文求解张量介质电常数条件下的麦克斯韦方程,导出了纵向场作用下旋光材料的波动方程。由于电场与磁场是互相耦合不能单独存在,因而引入了孪生标量波的概念,并证明了该标量波满足亥姆霍兹方程。

Based on the theoretical model coupling Maxwells equation with the rate equation of 4 level inverted population, the numerical simulation is made via the FDTD method and MATLAB programs. The simulation results show that 1. With the increase of the pumping rate, both the localization of the electric field and the spectrum mode numbers will change; 2. The lasing threshold decreases by increasing the size or concentration of the scatters; 3. The lasing threshold also decreases by increasing the size of samples or strengthening the sample randomness.

在理论和实验研究的基础上,利用麦克斯韦方程与四能级反转粒子数的速率方程相耦合的理论模型,采用时域有限差分方法和MATLAB程序对随机激光泵浦阈值特性进行了数值模拟与计算,模拟结果显示:随着泵浦速率的增大,出现了阈值前后电场强度局域态及频谱模式数的改变;随着散射体粒径的增大,浓度的增大,阈值呈现下降的趋势;随着样品长度的增大,随机强度的增强,阈值也呈现下降的趋势。

Kinetic models describe the particle velocity distribution function at each point in the plasma, and therefore do not need to assume a Maxwell Boltzmann distribution .

动力学模型描述粒子速度分布函数在每一个点的血浆,因此,不需要承担麦克斯韦,玻尔兹曼分布。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。