上网计时的程序，可以知道上网用了多长时间，记录并显示出来。...

手机通讯机制程序-mobile communications mechanism procedures

编码、通信中扩域实现-codec, the implemention on the galois extension field.

资源描述OPC 客户端程序 读RSLINX 数据.该程序用VS2013 C++.net开发。此程序功能：1：连接RSlinx服务端。2：自定义添加GRoup和ITEM。3：保存数据

In this simulink model , 16-QAM modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.-In this simulink model , 16-QAM modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.

这是个经典的用api进行串口编程的例子- This is classical carries on the string mouth programming with api the example

本人编写的ofdm系统中的em信道估计matlab仿真程序，可直接运行-I ofdm prepared by the system of channel estimation em Matlab simulation program can be run directly

用S7-200PLC的自由口模式和VB中的MSComm控件方便地实现了计算机与S7-200（CPU224）PLC的通讯。计算机作为主站,用户通过计算机可以方便地设置房间的控制指令并向PLC发出控制或监测命令， PLC作为从站来响应计算机发送的指令并采取相应的动作并将房间的电、水、热信息发回到计算机。用户可以通过电脑屏幕实时地监视到房间的电、水、热信息并进行相应的处理。-with S7-200PLC the Free Port Mode and the VB MSComm to realize a trap Computer and S7-200 (CPU224) PLC communications. Computer as a master station, Computer users can easily set up control rooms PLC issued directives to control or monitoring orders, PLC as from the station to respond to orders sent by the computer and take corresponding action will be room for electricity, water, Heat fat information to the computer. The user can screen real-time surveillance of the room electricity, water and heat information and handled accordingly.

音频/mpeg媒体类型

使用vb编写的与各种喷码机、打印机通讯的代码例子。该代码为使用rs232串口通讯，在工业应用中经常使用到。这个代码对那些刚加入工作、或者需要做课题研究的学生会有很好的指导作用。

PLL design assistnat-- tells you how to design a good P