# 电磁学作业代写Electromagnetism代考

## 电磁单元Electromagnetic units 代写

• 强相互作用Strong interaction
• 弱相互作用Weak interaction
• 分子间作用力Intermolecular force
• 磁流体力学Magnetohydrodynamics

## 电磁学的历史

Originally, electricity and magnetism were considered to be two separate forces. This view changed with the publication of James Clerk Maxwell’s 1873 A Treatise on Electricity and Magnetism [2]in which the interactions of positive and negative charges were shown to be mediated by one force. There are four main effects resulting from these interactions, all of which have been clearly demonstrated by experiments

## 电磁学课后作业代写

The scalar Wiener process $W(t)$ is defined by the following properties:

1. $W(t)$ satisfies the following initial condition:
$$W(0)=0$$
2. $W(t)-W(s)$, with $t>s \geq 0$, is a gaussian random variable with zero mean and variance $t-s$ :
$$\left\langle\left[W\left(t_{1}\right)-W\left(s_{1}\right)\right]^{2}\right\rangle=t-s$$
3. $W(t)$ has uncorrelated increments:
$$\left\langle\left[W\left(t_{1}\right)-W\left(s_{1}\right)\right]\left[W\left(t_{2}\right)-W\left(s_{2}\right)\right]\right\rangle=0$$
when $0 \leq s_{2}<t_{2} \leq s_{1}<t_{1} .$