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definition of machine epsilon

fastsim kalker轮轨蠕滑力计算程序，适用于机车辆动力学计算．(Kalker s all code 1. Exact solution 2. Linear Solution 3. Simplifiend solution 4. fastsim+ POLACH s contact algorithm)

The main tool you’ll use to build hierarchical applications is UINavigationController. UINavigationController is similar to UITabBarController in that it manages, (Navigation controller)

使用晶体相场法模拟枝晶生长的源文件并进行尖端半径速度的分析(The crystal phase field method is used to simulate the source file of dendrite growth and to analyze the tip radius velocity.)

说明：  VC++使用ADO开发ACCESS数据库,可以进行增删,改,查询等对数据库的管理(VC++ using ADO database development ACCESS, additions and deletions can be changed, the database query, such as the management of)

Password Generator generates 8 to 16 characters random password including upper&lower case letters and numbers, no special characters.

说明：  蒙特卡洛编程，含程序代码，代码直接复制即可，还有实例！！！(Monte Carlo programming, including program code.)

c++程序设计时声明对象时，通过使用构造函数，可以实现对象的初始值.(When declaring an object in c++ programming, the initial value of the object can be achieved by using constructors.)

做多客户端与服务器端的双向通信，采用QLocalSocket/QLocalServer实现起来简单，但通信效率太低，客户端发数据，服务器端的readyRead信号延时约100ms（看QT源码，发现里面用的是100ms定时器来检测信号），后来自己照着QLocalSocket的思路封装了windows的命名管道，采用多线程来接收数据，在本机上测试通过，通信效率有明显改善。-To do more client and server-side two-way communication, using QLocalSocket/QLocalServer to achieve them simple, but the communication efficiency is too low, the client made the data, the server-side readyRead the signal delay of about 100ms (see QT source code found inside using a 100ms timer device to detect the signal), and later their shining QLocalSocket encapsulates the idea of windows named pipes, using multiple threads to receive data, tested on this machine, the communication efficiency has clearly improved.