for-anderson-CFD-code

一个表达式计算库，支持算术，逻辑运算，位运算，支持多层级的if/then/else，功能强大。(Calculation of an expression library, support for arithmetic, logic operations, bit computing, multi-level support if/then/else, powerful.)

平面波与涡旋光束干涉的干涉图样，可以用来制作全息图，从而产生涡旋光束(Interference pattern of plane wave and vortex beam interference, can be used to produce hologram, resulting in vortex beam)

说明：  多维随机数的生成方法，一维随机数生成方法，高维随机数的生成方法(Generation methods of multidimensional random number, one-dimensional random number and high-dimensional random number)

北京航空航天大学数值分析大作业第二题，有难度，这可是历年北航研究生转载最多的代码了(Beijing University of Aeronautics and Astronautics numerical analysis of large operating the second question, there is difficulty, this is the most over the years Beihang University Graduate reproduced the code)

说明：  自己编的，实现l-bfgs解无约束优化问题(Own, and the realization of l-bfgs Unconstrained optimization problems)

Ⅰ层模型声波波场数值模拟源程序,对各向异性介质中的地震波进行研究，无论是进行野外施工技术研究，还是进 行岩层岩性参数与波动方程之间的关系的研究，或者是进行各向异性介质中地震波 场处理与分析的研究，都离不开各向异性的地震波场数值模拟。(Ⅰ layer model numerical simulation of acoustic wave source for seismic waves in anisotropic media research, whether in carrying out field work research, or to rock lithology parameters and the wave equation of the relationship between research, or to the anisotropy of seismic wave fields in media processing and analysis of the study, are inseparable from anisotropy of seismic wave field numerical simulation.)

说明：  简单地实现了一、二、三维的K均值聚类，效果还不错，适合初步学习模式识别的同志们(Simple implementation of one, two, three - dimensional k-means clustering, the effect is not bad, it is suitable for the initial learning pattern recognition comrades)

最小二乘估计法在直流电机参数估计中的一个应用，在只已知输入输出数据的情况下，就可以获得电机的内部参数。(DC motor parameter estimation least squares estimation method, in the case of known input and output data only, you can get the internal parameters of the motor.)

山农的通信的数学方法。是信息论的奠基性文章。(Shannong mathematical methods of communication. Is the foundation of information theory article.)

压缩包包含三个文件： 全主元高斯-约当消元法程序AGJDN.m；基于全主元高斯-约当消元法的迭代求解病态矩阵方法AGJDNM.m；AGJDN.m的测试方程。 程序参考自：Fortran常用算法程序集（第二版） 徐世良编。AGJDN.m能求解部分病态矩阵，而AGJDNM.m对于我的测试矩阵效果不佳，但也一并上传，仅供参考。 错漏之处，还望指正。 (Gaussian-Jordan elimination base on all principal element.)