任意阶张量相乘 比如说 T2*2*2*4 与T2*2*2*4 相乘 得到T2*2*2*2*2*2(TensorFlow A tensor of any order, such as T2*2*2*4 and T2*2*2*4, is multiplied by T2*2*2*2*2*2)

包含各种常见差分格式及其精度分析，可以作为下一步流体计算的基础。(A variety of common difference schemes and their accuracy analysis can be used as the basis for the next step of fluid computation.)

高斯扩散模式适用于均一的大气条件，以及地面开阔平坦的地区，点源的扩散模式。排放大量污染物的烟囱、放散管、通风口等，虽然其大小不一，但是只要不是讨论烟囱底部很近距离的污染问题，均可视其为点源。(The Gauss diffusion model is applied to homogeneous atmospheric conditions, as well as to ground open flat regions, and to point source diffusion patterns

2018.01最新编译，matlab需要2016b以上。 将需要运行的exe文件拷贝到MATLAB文件夹下，如bellhop3d.exe(The latest compilation(2018.01). Matlab should be 2016b or later. Copy the the "exe" file that you need to run under the "MATLAB" folder, such as "bellhop3

分层的一维热传导方程的有限差分法MATLAB程序，是简单的显式差分格式，尽量使用了矩阵运算，没有符号运算。 文件chafen1.m以路面为例，假设有多层建筑材料，热传导系数已经在代码中给出。用户使用时请按自己需要修改chafen1.m文件，增减层数，修改热传导系数等即可。(One-dimensional heat conduction equation finite difference method MATLAB program, is a simple explicit differenc