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• Statistical Inference 统计推断
• Statistical Computing 统计计算
• (Generalized) Linear Models 广义线性模型
• Statistical Machine Learning 统计机器学习
• Longitudinal Data Analysis 纵向数据分析
• Foundations of Data Science 数据科学基础

## 英国补考|电动力学代写electromagnetism代考|Formulation of the iterative WCIP method

The iterative WCIP is based around the formulation in transverse waves and the information gathering at the interface, which contains the given circuit. The iterative method is summarized in two essential stages. The first stage represents the diffraction of the incident wave across the interface and the second stage the reflected waves by the closure covers of the rectangular housing with periodic walls. Hence, the use of two given operators: the diffraction operator, defined within the spatial domain, and the reflective operator defined with the spectral domain. These two operators are of a restricted type, hence the method convergence being ensured, independently of the structure studied.

FSSs are periodic structures, operating as filters and displaying spectral selectivity, which depend upon the incident wave polarization, the geometry of the planar circuit and the separation distance between the FSS elements.

To explain the WCIP method, the FSS structure in Figure $3.2$ may be studied.

In the iterative WCIP method, the FSS structure is regarded as a periodic structure and the analysis thereof breaks down to to the unit cell shown in Figure 3.2(b). The broken lines in Figure 3.2(a) represent virtual periodic walls, which are assumed to separate adjacent FSS cells. The dual media issue within the iterative method is shown in Figure 3.1(c) where the waves are on both sides of the interface $\Omega$ on which the FSS circuit is etched.

Incident waves $\vec{A}{i}$ and diffracted waves $\vec{B}{i}$ within the media $i$ are calculated from the tangential fields by [RAV 03, CON 99] using the following equations:
\begin{aligned} &\vec{A}{i}=\frac{1}{2 \sqrt{Z{0 i}}}\left(\vec{E}{i}+Z{0 i} \vec{J}{i}\right) \ &\vec{B}{i}=\frac{1}{2 \sqrt{Z_{0 i}}}\left(\vec{E}{i}-Z{0 i} \vec{J}_{i}\right) \end{aligned}

## 英国补考|电动力学代写electromagnetism代考|Determining the diffraction operator

The diffraction operator is determined from both the FSS geometry and the interface boundary conditions $\Omega$.

Two types of FSS may be considered. Those FSSs which are uncharged and those which are charged. Charges are inserted within the FSS structure to ensure a better flexibility within the FSS selectivity. Generally, there are three domains: the metallic domain, the dielectric domain and the electrical charge domain. Uncharged FSSs are obtained by associating the charge domain with the dielectric domain or the metallic domain. The charge domain may contain several lumped elements (for example resistances, capacitances, inductances). These three domains are defined by Heaviside’s functions, that is to say the equations:
\begin{aligned} &H_{I}=\left{\begin{array}{l} 1, \text { on the dielectric } \ 0, \text { otherwise } \end{array}\right. \ &H_{M}=\left{\begin{array}{l} 1, \text { on the metal } \ 0, \text { otherwise } \end{array}\right. \end{aligned} $H_{Z}= \begin{cases}1, & \text { on the surfaces occupied by the loads } \ 0, & \text { otherwise }\end{cases}$

# 电动力学代考

## 英国补考|电动力学代写electromagnetism代考|Formulation of the iterative WCIP method

FSS 是周期性结构，用作滤波器并显示光谱选择性，这取决于入射波极化、平面电路的几何形状和 FSS 元件之间的分离距离。

$$\vec{A} i=\frac{1}{2 \sqrt{Z 0 i}}(\vec{E} i+Z 0 i \vec{J} i) \quad \vec{B} i=\frac{1}{2 \sqrt{Z_{0 i}}}\left(\vec{E} i-Z 0 i \vec{J}_{i}\right)$$

## 英国补考|电动力学代写electromagnetism代考|Determining the diffraction operator

$\$ \beginaligned } \& \mathrm{H}{-}{\mid}=\backslash \operatorname{left}{ 1 , on the dielectric 0 , otherwise 正确的。 \ \text { \& } \mathrm{H}{-}{\mathrm{M}}=\backslash \text { 左 }{

1 , on the metal 0 , otherwise

$\backslash$ end ${$ 对辛 $}$
$\$ \$H_{Z}={1, \quad$ on the surfaces occupied by the loads $0, \quad$ otherwise

## 有限元方法代写

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## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。

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