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利用AR模型对电力系统间谐波信号进行功率谱分析的matlab程序，另附一篇相关文章。(AR model using inter-harmonics on the power system signal analysis power spectrum matlab procedures related to a separate article.)

this code is for calculation the field distribution in 2D photonic crystals with FDTD method

离散时间信号的频域分析的简洁分析及其运用实例，用于地震信号处理(Discrete time signal frequency domain analysis of concise analysis and its application instance, used for seismic signal processing)

代码包含周期性信号的FFT仿真，纯学习研究使用。时域连续周期性，对应傅立叶变换频域离散非周期(FFT simulation code contains a periodic signal, pure learning research. Periodic continuous time domain, frequency domain corresponding to the discrete Fourier transform aperiodic)

Script to solve the heat equation in soil with seasonal temperature forcing

Shapiro提出的内嵌零树小波编码算法(EZW Embedded Zerotree Wavelet),其出发点在于小波变换后各级子带系数之间在空间上和方向上所呈现出带间相似性,这种空间相似性可以用一种新型的数据结构--零树(Zerotree).EZW算法就是充分利用这种相似性,获得高性能的图像编码算法.(Shapiro' s embedded zero tree wavelet coding algorithm (EZW Embedded Zerotree Wavelet), whose starting point is at all levels of sub-band wavelet transform coefficients and the direction in space with the similarity between shows, this space can be similar with a new data structure- zero tree (Zerotree). EZW algorithm is to take full advantage of this similarity, access to high-performance image coding algorithms.)

matlab rdetection for ECG to study ecg signal

SEPIC converter in MATLAB

说明：  这是一个关于小波阈值图像去噪的程序，通过对分解后的系数各层进行不同的阈值处理，最后得到去噪后图像。(It s about a wavelet threshold program well worth beginners reference! )

image enhancement matlab code ,can improve the picture quality ,especially for the image with low quality .(image enhancement Matlab code, can improve the picture quality. especially for the image with low quality.)