实现base64编解码运算，实现base64编解码运算

应用背景顶盖驱动流是计算流体与计算传热学一个经典问题，常用作不可压缩流动的校核算例，同时也是很好的lbm模拟学习的入门算例。对于刚开始接触的入门者有很大帮助。关键技术该程序采用了不可压缩的D2Q9模型以及标准的碰撞迁移规则，边界处理则采用了非平衡外推格式。虽然程序针对顶盖驱动而编写，但读者可以通过改变初始条件边界条件来计算其他的物理量。

数字带通滤波器的设计过程。共3个源程序。其中，dos.cpp为带通FIR的源程序，其中的滤波器阶数n，滤波器的低频fln，滤波器的高频fhn，窗函数w，可以按照自己的要求改变。这里采用的是汉宁窗。主函数main.cpp实现输入与fir的h(n)的卷积，输出结果Y(n)，并将其存储在y.txt中。最后，graphics.cpp从y.txt读取数据，再由语句画出波形，可以清楚地看出计算结果是否正确，并进行比较。-digital band-pass filter design process. A total of three sources. Among them, dos.cpp FIR bandpass to the source, the filter order n, the low-frequency filter FLN, the high-frequency filter fhn, window function w, in accordance with the requirements change. Here is the Hanning window. The main function main.cpp achieve the input and fir h (n) convolution, the output Y (n), and store them in y.txt China. Finally, graphics.cpp y.txt read data from and then draw waveform statement, we can clearly see whether calculations are correct, and comparisons.

流形学习，一种数值变换的前沿技术，广泛用于数据压缩，降维等-Manifold learning, a numerical transform the forefront of technology, widely used in data compression, dimensionality reduction, etc.

这是一个基于模拟退火算法的混沌神经网络模型-This is an algorithm based on simulated annealing chaotic neural network model

用语计算光子晶体的透射率和反射率以及能带结构-Term calculation of photonic crystal transmittance and reflectance as well as the energy band structure

研究生期间上《数值计算方法》课的作业，所有代码都是C语言实现并调试通过，现在上传为大家服务。这是西普生算法-simpson algorithm with c language

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在这我们实行轮转调度算法，随机函数用来创建过程的突发时间，到达时间。后该周转时间和等待时间的计算。

fft的文件，fortran环境下运行！欢迎指正！-fft documents, fortran environment running! Please correct me!

使用递归方法与非递归方法求解迷宫问题。内容涉及递归的消去、属于数据与算法课程。可以求解大型迷宫，输出迷宫路径