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编写程序，统计出大、小写字母、空格、 数字和其它字符个数 (Programming, the statistics of large, lowercase letters, spaces, numbers and other number of characters)

说明：  C++DES加密之源程序解释，精典，应该有人需要(DES encryption of the source explained that the classical, someone should be required)

Spring AOP 面向切面编程 开发工具IDEA, TomCat, Sql(Introduction to SpringAOP , Development tools IDEA, TomCat, SQL)

五级流水CPU设计 流水线是数字系统中一种提高系统稳定性和工作速度的方法，广泛应用于高档CPU的架构中。根据MIPS处理器的特点，将整体的处理过程分为取指令（IF）、指令译码（ID）、执行（EX）、存储器访问（MEM）和寄存器会写（WB）五级，对应多周期的五个处理阶段。一个指令的执行需要5个时钟周期，每个时钟周期的上升沿来临时，此指令所代表的一系列数据和控制信息将转移到下一级处理。(Five level flow CPU design)

java的课程实验，适合初学者。 都是上java专业课时候的实际实验内容，有源码。这是第三部分(完结)(java course experiments, suitable for beginners. When specialized courses are on the java content of the actual experiment, there is source code. This is the third part (End))

用 silverlight1.1 + .net 开发的3d开发例子 -With silverlight1.1+. Net development of the development of example 3d

一个宠物选择的小程序。用java实现。可供初学者学习。(a choice of small pets procedures. Using java to achieve. For beginners learning.)

(1)设计一个数字低通滤波器．设计指标如下： 通带内幅度衰减人大于1dB 阻带内幅度衰减大于15dB (2)编制计算设计的数字滤波器幅度特性与相位特性程序，并进行实验验证； (3)编制实现该数字滤波器程序并且模拟实现数字滤波 ①分别让满足所设计滤波器的通带、过滤带、阻带频率特性的正弦波通过滤波器，验证滤波器性能。 ②改变正弦抽样时间，验证数字低通滤波器的模拟截止频率是抽样时间的函数。((1) Design a digital low-pass filter. Design specifications are as follows: pass-band attenuation range of people within a range greater than 1dB stopband attenuation greater than 15dB (2) the preparation of calculation and design of digital filter amplitude characteristics and phase characteristics of processes and experimental verification (3) the preparation of implementation of the digital filter program and simulate digital filtering ① were designed to meet the pass-band filter, filter belt, stop-band frequency characteristics of the sine wave through the filter, verify the filter performance. ② change the sine sampling time, verify that the number of analog low-pass filter cutoff frequency is the sampling function of time.)

ystem will automatically delete the directory of debug and release, so please do not put files on these two directory.

利用Actor-Critic学习和径向基神经网络实现路径跟踪，可以跟踪直线和正弦路径(Actor-Critic learning and radial basis function neural network are used to realize path tracking. Linear and sinusoidal paths can be tracked.)