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Finite difference methods: Spatial discretization (3) Temporal discretization (2) Convergence, Consistency, Stability (2) Solution of PDEs require spatial and temporal discretization Typically, the spatially-discretized domain is called the grid The PDE (originally on a continuous domain) is solved on a discrete set of grid points Typically, the PDE is reduced to a set of algebraic equations (that might or might not involve matrix inversion) Types of grids: Structured grid Unstructured grid Hybrid grids

OPC 客户端程序 VB编写与西门子机床通信(OPC client program)

人事管理系统在VC++6.0编程通过，使用了ODBC、SQL Server等技术，实现了基本的人事管理功能(Personnel management system running well on VC++6.0,using ODBC and SQL Server，has the basic function of personal management)

说明：  Suzuki信道仿真,用于多路径信道衰落 综合大尺度衰落和小尺度衰落 可用来仿真频率选择性衰落以及时间选择性衰落(Suzuki channel simulation, which is used to synthesize large-scale fading and small-scale fading in multipath channel. It can be used to simulate frequency-selective fading and time-selective fading.)

C#TCP多线程异步传输 C#开发的服务器端与客户端，通过tcp协议进行文件传输，在Winform程序中使用了多线程异步传输，可定时由客户端向服务器端传输文件。客户端和服务器端分为两个C#工程独立编写开发，此程序已在实际工作中使用了半年了。 (Multi-threaded asynchronous transfer of C# TCP server and client in C# developers, through tcp protocol file transfer, multi-threaded asynchronous transfer Winform program can be timed by the client to the server-side transfer files. Independent preparation of the development of the client and server side is divided into two C# projects, this program has been used in practical work for half a year.)

数字系统1.1是一个好的应用系统之间转换为四个号码(十进制、二进制、十六进制、八进制)。你可以转换所有8位、16位和32位无符号数W(Digital system 1.1 is a good application to convert between four numbers (decimal, binary, hexadecimal, octal). You can convert all 8-bit, 16-bit and 32-bit unsigned number W)

SPY特工源码例程，程序结合易语言系统核心支持库，实现了通过鼠标焦点获得当前属性的标题及快捷键等信息。(SPY agent source routines, programs combine core system easy language support library that implements a property to get the current focus by the mouse and keyboard shortcuts and other title information .)

很强大的TCP/UDP测试工具，对于测试TPCServer高并发非常好用一直用的这个，强烈推荐使用！(Very powerful TCP / UDP testing tools, for testing TPCServer high concurrency very good use of this has been used, strongly recommended to use)

qt内建对话框，对qt中提供的对话框进行了系统归纳和总结，并在逐个演示。(qt built-in dialog box, on the qt dialog boxes provided in the system and summarized, and in one by one presentation.)

Visual C#实现按回车键让焦点在录入控件中移动的窗口,回车切换控件焦点//要想使这个方法起到作用先将窗体的keypreview属性改为true，此功能看上去要更加智能一些，对于经常使用键盘操作的录入员来说，是个很实用的功能，无需让用户去定焦确认，省去了一些录入的宝贵时间。 ，作者拥有版权，仅供学习与参考。(Visual C# and press the Enter key to move the focus in the input control in the window, enter the switching control focus// to make it play a role in the form s KeyPreview property to true, this function seems to be more intelligent, to often use the keyboard input member, is a very practical function, without allowing users to focus confirmation, saves the precious time. The author, copyright, learning and reference purposes only.)