LOGAN_XIONG

摘要： 2维波动方程初边值问题:2维波动方程如下, \begin{equation} \frac{\partial^2u}{\partial t^2} = D\left(\frac{\partial^2u}{\partial x^2} + \frac{\partial^2 u}{\partial y^2}\ 阅读全文

摘要： 二维泊松方程边值问题: 静电场中二维泊松方程如下,\begin{equation}\left( \frac{\partial^2}{\partial x^2} + \frac{\partial^2}{\partial y^2} \right)u = -\frac{\rho(x, y)}{\varep 阅读全文