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通过ArcView软件提供一个GIS数字综合平台，以实现信息查阅、数据分析等功能-ArcView software through GIS to provide a digital platform in order to achieve the information access, data analysis and other functions

JDK开发工具安装过程和基本输入输出程序的运行结果及实验心得-JDK development tools, the installation process and basic input-output program running results and experimental experience

计算器的功能实现 Java编写的计算器程序及源代码-Java calculator functions of the calculator to prepare procedures and source code

零耗时低频宽脉冲软PWM信号控制C51演示程序-zero time-consuming low-bandwidth pulses soft PWM control signal C51 Demonstration Program

MapInfo软件系统mif数据格式详细介绍。（英文资料）-MapInfo software system MAKING detailed data formats. (English)

This section describes the development and extension of a basic power flow program in Matlab. To the extent feasible, complex vector operations are used, even for the calculation of the Jacobian matrix .-This section describes the development and extension of a basic power flow program in Matlab. To the extent feasible, complex vector operations are used, even for the calculation of the Jacobian matrix .

源代码是中点Bresenham椭圆法。可以为初学者提供参考。-source code is the midpoint of Bresenham oval law. For beginners can provide a reference.

UNIX的命令格式，功能解释，将它与WINDOWS区别-UNIX command format, function explains that the difference between it and Windows

这是tiff文件格式的说明-This is the specification for the tiff format file

OpenCV 4下的图像变换，可以进行图像的旋转操作。-OpenCV 4 transform the image, the image can operate rotation.