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表达式二叉树的实现。输入任意一个前序中序或后序表达式，可生成对应的表达式二叉树并树状打印，之后用户可以选择以前序中序或后序将表达式再次输出。-expression of the realization of a binary tree. An arbitrary input before the order or sequence after sequence expressions, which will generate the corresponding binary tree and the tree expression Print, after users can choose before the order or sequence after sequence of expression of a recurrence.

这一段的程序主要描述了RLS滤波器的应用-This paragraph describes the procedures for the main application of RLS filter

说明：  列表滚动jquery选项卡代码是一款带左右箭头的选项卡滑动切换代码(List scrolling jQuery tab code is a tab sliding switch code with left and right arrows)

VB小游戏源码：吃豆子游戏,嘿嘿，这个游戏本身就很好玩，别只顾着玩，忘记学习哦。 　　提示： 　　这个游戏比较大，我们打开VB工程组文件PACMAN PROJECT GROUP VB5.vbg 　　就能加载工程，然后看看怎么把几个VB工程组合为工程组的方法。

一个简单的动网格算例，包括UDF和mesh文件。适合初学者(used for fluent)

ghost软件 一款很好用的备分工具 绝对好用-A good software ghost of a breakdown definitely handy tool

图片的Zoom效果和loading等效果，初学者可以学到很多图片处理方面的内容-Zoom effects and loading images and other effects, beginners can learn a lot of image processing aspects of

本书是经典畅销图书《Python 核心编程（第二版）》的全新升级版本，总共分为 3 部分。 第 1 部分讲解了 Python 的一些通用应用，包括正则表达式、网络编程、Internet 客户端编程、多线程编程、GUI 编程、数据库编程、Microsoft Office 编程、扩展 Python 等内容。 第 2 部分 讲解了与 Web 开发相关的主题，包括 Web 客户端和服务器、CGI 和 WSGI 相关的 Web 编程、Diango Web 框架、云计算、高级 Web 服务。第 3 部分则为一个补充/实验章节，包括文本处理以及一些其他内容。 本书适合具有一定经验的 Python 开发人员阅读(This book is a new upgraded version of the classic best-selling book Python Core Programming (2nd Edition). It is divided into three parts. Part 1 explains some general applications of Python, including regular expressions, network programming, Internet client programming, multi-threading programming, GUI programming, database programming, Microsoft Office programming, extension of Python and so on. Part 2 Topics related to Web development are explained, including Web client and server, CGI and WSGI related Web programming, Diango Web framework, cloud computing, advanced Web services. Part 3 is a supplementary/experimental chapter, including text processing and some other contents. This book is suitable for Python developers with some experience.)

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波束赋形的形成原理，天线不同的波束赋形方案(Formation Principle of Beam Shaping and Different Beam Shaping Scheme of Antenna)