格林函数

In the past 30 years, the Green's function method has been applied in many problems in condensed matter physics, and achieved great successes.

这是传统的迭代格林函数方法的一种推广，具有普适性，可以适用于任意的边界条件和形状效应等具体问题。

Vector partial differential operator ; Dyadic Green function ; Heteromophic waveguide ; Cutoff frequency

矢量偏微分算子；并矢格林函数；异形波导；截止频率

In this course we shall develop theoretical methods suitable for the description of the many-body phenomena, such as Hamiltonian second-quantized operator formalism, Greens functions, path integral, functional integral, and the quantum kinetic equation.

在本课程中，我们将会建立一种适合描述多体问题的理论方法，诸如哈密顿二次量子化算子形式、格林函数、路径积分、泛函积分和量子动力方程等。

A Starting from a path integral representation, obtain the Greens function of a harmonic

从路径积分表示式，得到谐振子的格林函数

A Starting from a path integral representation, obtain the Greens function of a harmonic oscillator

从路径积分表示式，得到谐振子的格林函数

Through a series of illation , it can be proved that progression Green function is prior to integral Green function.

公式推导表明，使用级数形式的格林函数可以使计算更加快捷。

A self-adaptation method to sample the unknown variables in the Green's function and in the generalized Sommerfeld integral in high frequency domain is proposed.

同时，还提出了对恒定电场中格林函数待定系数和高频下半无限大导电媒质中广义索末菲积分待定系数进行采样的自适应方法。

From the Maxwell equation in EMT sensing subsystem, two kinds of 3D electromagnetic integral solutions are obtained under material field distribution and with Dyadic Green function as integral kernel.

从EMT传感子系统的Maxwell方程出发，得到了两类物场分布情况下的以并矢格林函数为积分核的三维电磁积分解。

The numerical results demonstrate that the MEI coefficients obtained using the technique,which takes dipole layer excitation as the "Metron" and the Green function in free space as the integral Kernel,are of higher precision over other techniques.

数值结果表明，利用电偶极子层激励作为测试子和自由空间格林函数作为积分核确定MEI系数的方法，比之其它方法具有更高的精度和明显的优点。

Green quasifunction method is applied to Poisson's equations. Fredholm integral equations of the second kind are obtained. Irregularity of the kernel of integral equations is overcome by choosing a suitable form of the normalized boundary equation.

应用准格林函数方法，可将Poison方程化为第二类Fredholm积分方程，通过边界方程的适当选择，积分方程核的奇异性被克服了。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。