PHP获取可以用GBK编码的汉字拼音首字母

Cantilever simulations in COMSOL Multiphysics

这是智能化系统设计和工作与所有项目基于单片机投射电子项目的重要准则。这是有用的。

线形表的顺序存储结构算法 ＶＣ＋＋６．０下开发～！-linear sequence storage structure VC++6.0 algorithm developed ~!

对图片进行快速傅里叶变换，输出变换后结果图片-Fast Fourier transform of the picture, the output result of the transformed image

分支定界的0/1背包问题-branch delimitation of the 0/1 knapsack problem

卡尔曼算法，封装完整，容易看懂，新手容易用于自己的程序当中，更容易移植于自己的程序当中。适用于飞思卡尔智能车、微型飞行器的姿态求解算法中。

3维FDTD算法-arithmetic for three dimensional FDTD

运筹学中常用到的算法-tacticians of the commonly used algorithms

平均因子分解法，适用于正定矩阵First, let s recall the definition of the Cholesky decomposition: Given a symmetric positive definite square matrix X, the Cholesky decomposition of X is the factorization X=U U, where U is the square root matrix of X, and satisfies: (1) U U = X (2) U is upper triangular (that is, it has all zeros below the diagonal). It seems that the assumption of positive definiteness is necessary. Actually, it is "positive definite" which guarantees the existence of such kind of decomposition. -Average factor decomposition method applied to positive definite matrix First, let s recall the definition of the Cholesky decomposition: Given a symmetric positive definite square matrix X, the Cholesky decomposition of X is the factorization X = UU, where U is the square root matrix of X, and satisfies: (1) UU = X (2) U is upper triangular (that is, it has all zeros below the diagonal). It seems that the assumption of positive definiteness is necessary. Actually, it is positive

 一元稀疏多项式计算器1、一元稀疏多项式简单计算器的功能是：1.1 输入并建立多项式；1.2 输出多项式，输出形式为整数序列：n，c1,e1,c2,e2,………cn,en,其中n是多项式的项数，ci和ei分别是第i项的系数和指数，序列按指数降序排列；1.3多项式a和b相加，建立多项式a+b；1.4 多项式a和b相减，建立多项式a-b。