PSNR_correct

给出两个chirp信号相加后，由瞬时频率定义求出的瞬时频率曲线，说明瞬时频率的不确切性；(The sum of two chirp signals are given, after the definition of instantaneous frequency derived from the instantaneous frequency curve, indicating lack of precision in the instantaneous frequency )

利用DFT法求周期信号的功率谱,实现离散傅立叶变换DFT,最后分析得到频谱幅度.(DFT method using the power spectrum of periodic signals seeking to achieve the Discrete Fourier Transform DFT, the final analysis, amplitude spectrum obtained)

内点法最优潮流程序，其中可以修改相关目标函数来计算不同情况下的最优点(Interior point optimal power flow program)

非平稳信号经过分解后，对其进行谱分析，此希尔伯特谱程序，弥补了了以前的缺陷(Non stationary signal through decomposition, the spectral analysis, the Hilbert spectrum procedures, make up for the previous defect)

matlab中实现三维空间中一点绕一条直线旋转的程序，输入一点，一条直线和一个角度，输出旋转后的点。(Three-dimensional space, matlab point in a straight line rotating around the program, enter the point, a straight line and a point of view, the output after the point of rotation.)

说明：  基于matlab的图像识别源代码，值得学习，不过是英文的(Image Recognition source on matlab)

计算地壳、岩石圈地幔的绝热地温梯度、固相线、液相线的程序( Adiabatic geothermal gradient,solidus and liquidus of the lithospheric mantle and asthenosphere)

mega128定时器0的CTC模式产生的PWM波形(mega128 timer PWM waveform generated by CTC mode 0)

tv模型代码,用到的偏微分方程技巧和各项异性扩散(tv model code, techniques used in partial differential equations and anisotropic diffusion)

DPLL implementation in matlab