一个朋友购买的商业版房产网源程序，价值1800元，去年年尾的时候送的，一直在收藏和研究，现在拿出来分享。...

1.本文对一种高效的升压式PWM 变换电路作了分析研究 对开关状态的切换效率高 采用双零软开关工作，大大降低了开关损耗, 提 高了电路的转换效率. 2.该电路在高频的开关电源、逆变器等电力电子电路上有很大的实用价值, 可以提高电路的转换效率. -1. In this paper, an efficient step-up PWM conversion circuit analysis study on the switch to switch the state of high efficiency soft-switching double-zero work, greatly reduces switching losses, improve the conversion efficiency of the circuit .2. The circuit in high-frequency switching power supplies, inverters and other power electronic circuits have great practical value, can improve the circuit

这是一个用multisim编写的时钟，主要由芯片级联而成-This is a clock with Multisim prepared mainly by the chip cascade from

这是小时候的小孩玩过的比较经典的一款小游戏，适合c++初学者借鉴-This is when the kids played a comparison of the classic game for c++ beginners learn

shadow detection paper from net,it is value

perfect text chatting system

通过界面配置，生成一个隐蔽查找文件及特征关键词的控制台程序。通过运行该控制台程序，就可将查找到的文件名保存到C:\_log.txt文件中了。-through the interface configuration, generating a concealed documents and search features keyword console procedures. By running the console procedures, it can find the file name to save to C : _log.txt the document.

一个非常非常经典的手机游戏,是手游必备,你可别告述我 你没有啊-a very classic mobile phone game, is essential travel hand, you may not notice you not to me ah

正弦信号发生器 而且频率可调 幅度也可调-Sinusoidal signal generator and an adjustable frequency range of adjustable

免费打电话软件 好好啊 好 免费打电话软件 好好啊 好-Free call software make free phone software ah good good good ah

ucgui 版本3.9,支持汉字显示,在VC++6.0环境下可以进行运行-ucgui version 3.9, support for Chinese characters show that in VC++6.0 environment can be run