脚本1.7（人物18岁）

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这个程序可以计算给定点处的小区信号范围覆盖。-is program computes a map of visibility from a selected point on a topography. It has been written to help the search for radio relay best location. Because it considers only direct line of sight, it gives a good estimation for possible radio link for short distances only (less than 10 km), neglecting curvature of the Earth, Fresnel zone and atmospheric refraction on radio waves propagation. The program computes the relative elevation angle of the mask for each point (the angle is null or negative if the point is visible). The function needs a digital elevation model Z and associated (X,Y) vectors or matrices of coordinates (same unit as Z), position of the point (X0,Y0), the antenna height H0 (for instance 4 m), and the hypothetic antenna height Ha on each topography points (for instance 3 m). When no output argument is given, the function plots a map of the results (color map of mask angles, and blank for visible points, see example screenshot). The s

Implementation of CORDIC atan block in VHDL

介绍了微波patch天线的基本原理和特性，具体用了gps天线作为例子进行设计推导。-introduced a microwave antenna patch the basic principles and characteristics with a specific example gps antenna design is derived.

超声变幅杆原理和设计,详细介绍了超声变幅杆的原理及设计，pdf电子书籍(the pricinple and design of the ultrasonic horn)

文件方式读写DBF的类库，具体接口请看头文件。-DBF papers to read and write the class library, see the specific interface header file.

python网络数据采集 高清pdf 特别推荐这本书，通俗易懂，作者讲的非常详细(Python Network Data Acquisition high-definition pdf)

VC++从DLL中获得资源的小实例源代码，从DLL中获得背景图像，可者是一个图标资源或是其它类型的文件，总之，学会了一种，就可以举一反三，灵活掌握了。(VC++ from the DLL resources, source code examples to get a background image from the DLL, can an icon resource, or other types of documents, in short, learned, you can learn by analogy, flexibility.)

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