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This an updated new edition of the popular elementary introduction to probability theory and information theory, now containing additional material on Markov chains and their entropy. Suitable as a textbook for beginning students in mathematics, statistics, computer science or economics, the only prerequisite is some knowledge of basic calculus.-This is an updated new edition of the popular elementary introduction to probability theory and information theory, now containing additional material on Markov chains and their entropy. Suitable as a textbook for beginning students in mathematics, statistics, computer science or economics, the only prerequisite is some knowledge of basic calculus.

C 语言中的类模拟（C++编程思想） 在面向对象的语言里面，出现了类的概念。这是编程思想的一种进化。所谓类：是对特定数 据的特定操作的集合体。所以说类包含了两个范畴：数据和操作。而C 语言中的struct 仅仅是数 据的集合。-C language of analog (C Programming thinking), the object-oriented languages inside, a kind of concept. This program is an evolutionary thinking. The so-called categories : data specific to the particular operation of the collectivity. So category contains two areas : data and operation. While the C language struct is just a collection of data.

基于单文档的画图程序 可以画直线 矩形 圆形 椭圆等 线型、粗细、颜色可任意设置， 也可选择有无填充色，可保存文件，并打开-Paint program based on single document can draw a straight line rectangle circle ellipse and line style, thickness, color can be arbitrarily set, can also choose whether the fill color, save the file, and open the

stm32 红外线遥控智能小车源代码，内部注释详细清晰，新手易上手。

NFC刷卡系统上位机驱动程序，封装成dll动态链接库，方便PB、vb等程序直接调用dll提供的借口，实现对NFC的读卡操作。已编译通过，测试可行。

function [tout, yout] = rk4(ypfun, tspan, y0, h) ％定步长四阶Runge-Kutta法求常微分方程(组)数值解 ％[tout,yout] = rk4( ypfun , tspan, y0,h) ％ 这里字符串ypfun是用以表示f(t, y)的M文件名, ％ tspan=[t0, tfinal]表示自变量初值t0和终值tf ％ y0表示初值向量y0，h是步长。 ％ 输出列向量tout表示节点 (t0 , t1 , … , tn) ％ 输出矩阵yout 表示数值解，每一列对应y的一个分量-function [tout, yout] = rk4 (ypfun. tspan, y0, h)% fixed step four-stage Runge- Kutta method for ordinary differential equations (Group) numerical solution% [tout. yout] = rk4 (ypfun, tspan, y0, h)% string ypfun here is used to indicate that f (t, y) M name, tspan% = [t0. tfinal] said variable initial and final t0 tf% y0 said initial vector y0, h is a step. % Output column vector tout said Node (t0, t1, ..., tn)% output matrix yout said numerical solution, each y counterparts out of a weight

A resizing example in visual basic best for practcal demostration in vb

一些常见的二进制编码举例，是常见的二进制位操作-Some common examples of the binary code

主要是用于大智慧的数据采集，可以定期进行采集以做成服务-Intelligence primarily for large data collection can be collected periodically in order to make services