郵件系統是Linux網絡應用的重要組成，一個完整的郵件系統包括三個部分：底層操作系統（Linux Operation），郵件傳送代理（Mail Transport Agent，MTA），郵件分發代理（Mail Delivery Agent，MDA），郵件用戶代理（Mail User Agent，MUA）。 Postfix是一個非常優秀的MTA，她素以高效、安全的特點而著稱。Postfix是作者在UNIX上所見過的MTA中在反垃圾郵件（Anti- Spam或Anti-UCE）方面做得最好的一個，甚至有很多公司在Postfix代碼的基礎上進行二次開發而推出反垃圾郵件網關產品。MTA的反垃圾郵件功能，實際上就是在MTA處理過程中對會話進行過濾。這個過濾不但過濾了發往自身的垃圾郵件，而且還防止了自身被惡意利用發送垃圾郵件。Postfix 實現了目前所有主要的MTA過濾技術。postfix是Wietse Venema在IBM的GPL協議之下開發的MTA（郵件傳輸代理）軟件。和Sendmail相比Postfix更快、更容易管理、更靈活、更安全。
上傳時間： 2015-11-25
上傳用戶：dapangxie
這些天新殼大爆發啊，我也來湊個熱鬧。 又是一個自娛自樂的產物，和netsowell發布過源碼的那個不一樣，這個殼90％的代碼是用delphi寫成的。 僅在win2k+sp4上測試過，不支持9x系統。因為用了一個可能不安全的隱藏oep的方法，xp系統上有可能會出問題。 沒花，沒anti代碼，適合初學者了解殼。 現在只能壓縮exe文件。 壓縮包里含源碼，算是為這里的delphi初學者的小禮物。
標簽：
上傳時間： 2013-12-28
上傳用戶：541657925
pav 反病毒源碼 /*************************************************************************** * * * 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 * * * * * ***************************************************************************/
上傳時間： 2014-01-14
上傳用戶：hullow
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, anti-lock brakes, and even a few toasters. The military uses embedded software to guide missiles, detect enemy aircraft, and pilot UAVs. Communication satellites, deep-space probes, and many medical instruments would have been nearly impossible to create without embedded software.
標簽： familiarity programming experience dominant
上傳時間： 2013-12-11
上傳用戶：362279997
可編程并行接口８２５５Ａ完成的交通燈實驗 用８２５５Ａ的Ｂ端口和Ｃ端口控制１２個ＬＥＤ的亮和滅（輸出為０則亮，輸出為１則滅），模擬十字路口的交通燈。 -programmable parallel interface 8255A completed, the traffic lights experimental 8255A port B and C - I control 12 LED bright and methomyl (output of 0-liang, the output of an anti), the simulation of traffic lights at a crossroads.
上傳時間： 2016-08-13
上傳用戶：來茴
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 reduce cross-noise and high performance free scaler. Four built-in motion,
標簽： dual controllers decoders display
上傳時間： 2017-03-20
上傳用戶：來茴
這是I2c網關Id獨立燒寫程序， 燒寫的ID必須要求是：“0~9”、“a~z”、“A~Z”的16為字符才能燒寫成功。 其中當是輸入的小寫字母時，自動轉換為大些燒入。 如： 1） # ./burnID 0123456789abcdef 燒入的是：0123456789ABCDEF 2] # ./burnID 0123456789@ cdef 燒入不成功，因為有其他字符 3） # ./burnID 0123456789abcdefDfs 燒入也不成，因為超過16個字符 built-in analog anti-aliasing filters, four 10bit Analog-to-Digital converters, and proprietary digital gain/clamp controller, high quality Y/C separator to reduce cross-noise and high performance free scaler. Four built-in motion,
上傳時間： 2017-03-20
上傳用戶：playboys0
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.
標簽： programmer distress software illegal
上傳時間： 2014-12-21
上傳用戶：李夢晗
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 communications, increasing resistance to natural interference and jamming, and to prevent detec
標簽： Spread-spectrum electromagnetic techniques particular
上傳時間： 2017-06-06
上傳用戶：royzhangsz
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 : Make a MATLAB function which performs quadrature modulation and demodulation for a input signal with anti-aliasing filtering.
標簽： Implementation demodulation implementing modulation
上傳時間： 2013-12-09
上傳用戶：蠢蠢66
