这是个经典的用api进行串口编程的例子

射频卡读卡程序,射频IC卡识别技术，通常由载有密码的射频IC卡来代替传统的键盘密码。读卡模块读出密码后，即产生输出电信号，继而驱动执行机构动作，或将密码（如卡号）送给外围对接设备（如电脑或单片机等）。采用射频卡读卡模块及感应体构成的特定系统中，因射频卡内码信号唯一且不可复制，因此射频卡不仅杜绝了非法复制密码，还为各种控制采用信息化管理创造了条件。-RF card reader procedure, radio frequency identification technology IC cards, usually containing the password from the RF IC cards to replace the traditional keyboard password. Reader module read out a password, as a result, the output signal, and then drive the implementation agency action, or passwords (such as logging) gave the external docking equipment (such as computer or microcontroller, etc.). RF card reader module consisting of sensors and the specific system, RF signal code card but not the only copy, RF Card not only prevents illegal copying passwords, but also controls the use of information management to create the conditions.

使用VB访问WINCC，可实现第三方软件控制S7200的PLC-use VB to visit WINCC, achieving third-party software control S7200 PLC

IEC61375-1列车通信总线(TCN)协议中文翻译。-IEC61375-1 Train Communication Bus (TCN) Chinese translation of the agreement.

此代码可以处理的误码率仿真 QPSK 和 BPSK 为各种价值观的信噪比。至少 10 ^6 传输的比特一直被认为。10 不同 itaeration 信噪比已被采取。

介绍各种平台进行SOCKET编程的好东东。-on various platforms Socket Programming good Dongdong.

对于QPSK通信系统的蒙特卡洛仿真-monte carlo simulation on the QPSK communication system

AT命令集，GPRS模块开发必备，包含2个pdf，一中文，一英文，可互相对照阅读-AT command set, GPRS module development necessary, including the two pdf, one Chinese, one English, can be read against each other

Modicon Modbus Serial Driver for Intellution iFIX version 7

butterworth滤波器，实现高通低通带通的butterworth滤波器

联通手机短信发送器情报所的中文光盘和军医大学图书馆光盘检索的各种文本文献摘要。从本版本开始,文献之星可以检索转换...可以设置小文档包含的单词数量。* 新增了“获取网页中所有声音连接-Unicom SMS transmitter intelligence by the Chinese Medical University CD-ROM and CD-ROM library retrieval of text abstracts. In this version, documentation Star Search conversion ... can be installed files contain a small number of words.* The new "access to the website linking all voices