matlab曲面拟合

此程序是进行人脸识别时，进行非线性降维后提取特征的一个典型方法，想做非线性降维特征提取的朋友可以研究，本人看后收获颇多(This procedure is carried out face recognition, the non-linear dimensionality reduction after the extraction of the characteristics of a typical method to do non-linear dimensionality reduction Friend feature extraction can be studied, I watch a lot of post-harvest)

对于给定的雷达信号参数,对线性调频信号时域与频域的波形仿真(Radar signal for a given parameter, the linear frequency modulated signal time-domain and frequency domain waveform simulation)

21种特殊函数的数值计算的matlab代码，包括bessel函数，gamma函数，beta函数等(21 kinds of special functions matlab numerical code, including bessel function, gamma function, beta function, etc.)

关于自适应粒子滤波，我觉得很好用，贝叶斯滤波适合非线性和非高斯环境，在粒子滤波基础上 又加改进(About adaptive particle filter, I feel very good, a bayesian filter for nonlinear and non-gaussian environment, particle filter in again on the foundation and improvement)

摔倒检测，可判断前摔，后摔，左摔，右摔，并用MATLAB界面实时显示。(Fall detection, can be determined before the fall, after the fall, fall left and right fall, and real-time display interface with MATLAB.)

说明：  提供 基于粒子群算法优化的变分模态分解算法，适应度函数选择的是模糊熵(This paper presents a variational mode decomposition algorithm based on particle swarm optimization, and the selection of fitness function is fuzzy entropy)

说明：  给出了布谷鸟算法的原始代码，逐行进行解释说明，浅显易懂；对原始布谷鸟算法代码进行了改进。(The original code of the cuckoo algorithm is given, which is explained line by line and easy to understand. The original cuckoo algorithm code is improved.)

计算信号的循环谱，并画出三位仿真图跟等高线图。采用的FAM 是基于快速傅里叶变换运算的时域平滑抽取算法，该算法包含了基本时域平滑算法的所有思想，首先对输入序列进行下抽样，以每组 N "个数据进行 N "点 FFT，接着将滤波器输出结果频移到基带获得抽样后的基带复包络信号，然后将复包络乘积序列进行 P ( P = N / L)点 FFT。

it has different sources