matlab有限元分析1D杆结构，2D热扩散问题，2D弹性问题，2D梁受力问题-matlab finite element analysis of 1D bar structure, 2D thermal diffusion problem, 2D elasticity problems, 2D Beams problem

一个树状数组各种改造姿势的模板。除了常规用法单点查询求前缀和外，支持区间修改单点查询、区间修改区间求和、RMQ、离线平衡树以及多维扩展-Many improved versions of binary indexed tree. Which can be used to do these kinds of work in a 1D array: Change one point+k and get the prefixsum Change a range+k and get value

FDTD CPML 1D absorption boundary conditions div hr div B 文件列表 B ： div()