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非常流行的iOS 下的 3d 开发引擎。

SQLite数据库文件分析，可以分析到删除标识，如果没有做压缩收复的话(SQLite file analysis, can be analyzed to delete the logo, if there is no compression recovered)

用objective-c写的扫雷游戏，很经典，涉及到了很多知识，尤其是算法(Written in objective-c minesweeping game, classic, design a wide range of knowledge, especially in the algorithm.)

mapgis操作手册，详细介绍了mapgis的功能和操作方法(MAPGIS manual detailing MAPGIS function and method of operation)

基于DSP&CPLD的载波移相多电平PWM实现的研究(DSP & CPLD-based carrier phase multi-level implementation of PWM)

具体介绍了但交叉口多交叉口的控制方式，采用vissim仿真，对于新手具有借鉴意义(The control strategy model built by SIMULINK can be used for reference by novices.)

几何光学笔记 几何光学中用到的一些重要的公式和结论 希望对大家有用(Geometric optics, geometrical optics notes some important formulas used and conclusions of hope for all of us)

this file talk about network

数字通信仿真报告，单极性，双极性码，HDB3、AMI码等波形及报告(Digital communication simulation report, unipolar, bipolar code, HDB3, AMI code and reports, such as waveform)

This sample shows how to use Core Text to display large bodies of text, text with mixed styles, and text with special style or layout requirements, such as use of custom fonts. A version of this sample was used in the "Advanced Text Handling for iPhone OS" WWDC 2010 Session.