Stocks-query

说明：  直方图-柱状图-曲线图绘制及生成控件VB版附示例(Histogram Curve chart drawing and generating control VB version with examples)

C++学习资料，chm格式的文件，希望对大家有帮助(C++ Study File For C++ Premier)

中频感应加热以其加热效率高、速度快，可控性好及易于实现机械化、自动化等优点，已在熔炼、铸造、弯管、热锻、焊接和表面热处理等行业得到广泛的应用。 本设计根据设计任务进行了方案设计，设计了相应的硬件电路，研制了20KW中频感应加热电源。 本设计中感应加热电源采用IGBT作为开关器件，可工作在10 Hz～10 kHz频段。它由整流器、滤波器、和逆变器组成。整流器采用不可控三相全桥式整流电路。滤波器采用两个电解电容和一个电感组成Ⅱ型滤波器滤波和无源功率因数校正。逆变器主要由PWM控制器SG3525A控制四个IGBT的开通和关断，实现DC-AC的转换。 设计中采用的芯片主要是PWM控制器SG3525A和光耦合驱动电路HCPL-316J。设计过程中程充分利用了SG3525A的控制性能，具有宽的可调工作频率，死区时间可调，具有输入欠电压锁定功能和双路输出电流。由于HCPL-316J具有快的开关速度（500ns），光隔离，故障状态反馈，可配置自动复位、自动关闭等功能，所以选择其作为IGBT的驱动。 对原理样机的调试结果表明，所完成的设计实现了设计任务规定的基本功能。此外，为了满足不同器件对功率需要的要求，设计了功率可调。这部分超出了设计任务书规定的任务。(induction heating with high heating efficiency, speed and good controllability and easy to mechanization. the advantages of automation, in melting, casting, bending, forging, welding and surface heat treatment and other industries have been widely employed. According to the design tasks for the design of the program design, design corresponding to the hardware circuit, Development of 20 KW induction heating power. The design of induction heating power IGBT used as a switching device, which can work in 10 Hz- 10 kHz frequency band. It consists of rectifier, filter, and the inverter components. Controlled Rectifier not use the entire three-phase bridge rectifier circuit. 2 filter used an electrolytic capacitor and inductor components II-type filter and passive PFC. Inverter mainly by the PW)

说明：  网络状态实时监控，断网报警，本机IP地址显示。(Real-time network status monitoring, fault alarm network, the machine IP address display.)

一款利用vc调用windows API函数，模拟键盘输入的小程序。仅供参考(use vc calling Windows API functions, simulated keyboard input of small procedures. For reference)

超级文本文档，实现日历，内存查看，鼠标坐标显示，改变字体，背景颜色(Hypertext documents, realization of the calendar, memory view, the mouse coordinates display, change fonts, background color)

基于visual c++开发，实现有bmp图像序列向avi视频信号转化(Based on Visual C + + development, the conversion from BMP image sequence to avi video signal is realized)

本手册详述于中电41所的1487、144x、146x系列信号发生器的编程方法。介绍SCPI语言，后面有VC例程(This manual describe 1487,144 x, 146x series signal generators programming methods. SCPI language is introduced, followed by VC routines)

内存的分配与管理。模拟操作系统的功能，采用动态链表的方式。。。。(Memory allocation and management. Simulation of the operating system functions, the way dynamic list. . . .)

比较详细的源文件,由VB.NET跟Sqlserver2000编的教务管理系统(The source of more detailed documents, VB.NET with SQL Server 2000 prepared by the Educational Management System)