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邮件系统是Linux网络应用的重要组成，一个完整的邮件系统包括三个部分：底层操作系统（Linux Operation），邮件传送代理（Mail Transport Agent，MTA），邮件分发代理（Mail Delivery Agent，MDA），邮件用户代理（Mail User Agent，MUA）。 Postfix是一个非常优秀的MTA，她素以高效、安全的特点而著称。Postfix是作者在U ...

这些天新壳大爆发啊，我也来凑个热闹。 又是一个自娱自乐的产物，和netsowell发布过源码的那个不一样，这个壳90％的代码是用delphi写成的。 仅在win2k+sp4上测试过，不支持9x系统。因为用了一个可能不安全的隐藏oep的方法，xp系统上有可能会出问题。 没花，没anti代码，适合初学者了解壳。 现在只能压缩exe文件。 压缩包里 ...

pav 反病毒源码 /*************************************************************************** * * * File: ANTI-VIRUS * * Function: This program demostrating file anti-virus managment * * * * Author: Long Yun Liang * * First edit: 1995,3,10 * * Last edit: 1996,11,5 All Rights Reserved * * * * ...

If you have programming experience and a familiarity with C--the dominant language in embedded systems--Programming Embedded Systems, Second Edition is exactly what you need to get started with embedded software. This software is ubiquitous, hidden away inside our watches, DVD players, mobile phones ...

可编程并行接口８２５５Ａ完成的交通灯实验 　 用８２５５Ａ的Ｂ端口和Ｃ端口控制１２个ＬＥＤ的亮和灭（输出为０则亮，输出为１则灭），模拟十字路口的交通灯。 -programmable parallel interface 8255A completed, the traffic lights experimental 8255A port B and C - I control 12 LED bright and methomyl (output o ...

The TW2835 has four high quality NTSC/PAL video decoders, dual color display controllers and dual video encoders. The TW2835 contains four built-in analog anti-aliasing filters, four 10bit Analog-to-Digital converters, and proprietary digital gain/clamp controller, high quality Y/C separator to redu ...

这是I2c网关Id独立烧写程序， 烧写的ID必须要求是：“0~9”、“a~z”、“A~Z”的16为字符才能烧写成功。 其中当是输入的小写字母时，自动转换为大些烧入。 如： 1） # ./burnID 0123456789abcdef 烧入的是：0123456789ABCDEF 2] # ./burnID 0123456789@ cdef 烧入不成功，因为有其他字符 3） ...

Do you as a programmer for their own software to be illegal to crack the use of distress, this is a hot issue programmers abroad, I believe you made reference to this source will be a number of anti-cracking tools.

Spread-spectrum techniques are methods by which electromagnetic energy generated in a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. These techniques are used for a variety of reasons, including the establishment of secure communica ...

Title : Implementation of quadrature modulation and demodulation Design Object : By implementing quadrature modulation and demodulation of analog signals in digital signal processing, students will have better understanding of sampling and frequency analysis of discrete-time signals. Design Content ...