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说明：  文主要目的是针对讯号频谱分析仪(Signal spectrum analyzer)做功能测试，以确定讯号频谱分析仪之各种运算功能正确，其中测试共 分为正弦与余弦波检查、反假象滤波器检查(Antialiasing Filter Check)、频率响应函数与相位角检查(FRF & Phase Check)、自身能量密度函 数检查(Power Spectrum Check)、动态范围检查(Dynamic Range Check)等五个项目的快速傅立叶转换检查(Fast Fourier Transform Check)，并 对五个项目之测试原理、测试步骤及测试结果加以说明，提供频谱分析仪功能测试之正确方法，亦可作为自制频谱信号处理单元及频谱分 析程式之验证。(The main purpose of the text is for the signal spectrum analyzer (Signal spectrum analyzer) to do functional testing, to determine the signal spectrum analyzer features a variety of computing the right, which is divided into sine and cosine test wave inspection, anti-false filter inspection (Antialiasing Filter Check), the frequency response function and phase angle of inspection (FRF &amp Phase Check), its energy density function check (Power Spectrum Check), dynamic range checking (Dynamic Range Check) and other five projects FFT check (Fast Fourier Transform Check ), and principles of the five test items, test steps and test results to show that the spectrum analyzer to provide the proper testing method may be used as self-spectrum signal processing unit and the spectral analysis of the verification.)

matlab function ---> find roots using fixed-point iteration (matlab function---> find roots using fixed-point iteration )

pulse width modulation for voltage source inverter

中心逼近式改进灰色模型滑坡形变预测预报代码，自己写的，带有详细的解释(Center approach to improve the gray model of landslide deformation forecasting code, wrote it myself, with a detailed explanation)

说明：  matlab源码，关于压缩感知基本算法的一些应用(matlab source code, the basic algorithm on a number of compressed sensing applications)

matlab版本 图论中的全源最短路径floyd算法 一般C版本的比较多，这里提供matlab版本的，更简单方便使用 (Matlab code of Floyd algorithm in graph theory)

分层空时码的自己编写的zf分解检测程序，包括判决无误和判决有误差两种情况(Layered space-time codes zf prepared by decomposition of their own testing procedures, including the accurate judgments and sentences a margin of error of two cases)

reading Ply format file and exract vertex and face matrix for 3D-Objects

信息论的原理应用个传输，以及噪声的干扰对信号传输的影响(Information theory the principle of application of a transmission, and noise interference on the signal transmission)

find roots by search gold metod