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iwt code in images matlab code

完整的jpeg压缩解压程序，基于matlab环境，调试无误(Complete jpeg compression decompression program, based on matlab environment, debug and correct)

此程序为matlab庞加莱截面程序，能够为非线性动力系统提供判断周期与概周期运动提供理论依据(This procedure for the Poincaré section matlab program that can provide decision period and almost periodic motion of nonlinear dynamic system provides a theoretical basis)

matlab的地震声波正演，包括双程声波、单程声波。(Matlab seismic acoustic forward modeling)

数字图像处理中的有关频域滤波的代码，希望对大家能有所帮助 matlab(Digital image processing in the frequency domain filtering code, and hope we can help matlab)

用matlab绘制海洋声线的程序，是水声工程专业的人必须要掌握的(Marine acoustic line drawn using matlab procedure is Acoustics Engineering professional people must master)

非线性系统的模型阶次辨识+模型系统辨识，非常有效(Model order nonlinear system identification+ model system identification, is very effective)

来自2013年的双域滤波算法，文章和对应的matlab代码，实现简单但性能堪比BM3D算法(the dual-domain image denoising method. The article and relevant matlab code are provided. It is very easy to carry out but its performance is comparable to the BM3D method)

说明：  esn代码，稍加修改，不一定正确，上传分享(The modified ESN code is not necessarily correct. Upload and share the code.)

可以随机的将N个数分配到N个位置上，特别是在一些随机分配的问题上有用(N number will be randomly assigned to the N positions, particularly in a number of issues were randomly assigned to be useful)