丹迪克 DK-51B的协议

简单的二维码QRCode C_C++库使用演示源代码

潮流计算是电力系统稳态分析的重要组成部分，pq分解法是牛拉法的改进。(Power system power flow calculation is an important part of the steady state analysis, P- Q decomposition method is a kind of improvement of cattle rafa.)

HSDL3208半双工通讯红外收发器，集成一体化红外通讯器件(HSDL3208 half-duplex communication infrared transmitters, Integration infrared communication device)

c#使用report viewer 10.0 版本 控件，先使用 SQL REPORTSERVICE  客户端 设置模板，完成后通过控件进行解析。 本人使用的开发软件是 VS2015 + SQL SERVER2016 + report viewer 10.0 .

远程网络唤醒计算机，其中计算机IP为192.168.10段的。主要分享网络唤醒的报文格式(Wake the computer network boot, where computers default to 192.168.10 segment, primarily for source)

摘要 电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。 基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。 关键词：数字合成信号源；程控；调幅；调频；移相； (Abstract Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration. Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)

这是一个较为精炼的汽车管理系统 操作简单 快捷方便 希望您能够采纳后开通我的会员。(This is a more refined vehicle management system operation simple and convenient want you to adopt my membership after the opening.)

One of the most useful books for C++ developer

wince 下的directui编程，界面编程不在是难事。(wince under directui programming interface programming is not difficult.)

将txt文件内容读入mysql数据库