pipei

说明：  概率的功率，及其功率谱密度的求法，好好看看对大家有好处的哦 (Probability of power, and its power spectral density method, a good look at all of you good oh)

Content based Image retrieval

the code file that is uploded is harmfreq file

采用了小波去噪的思想，课程设计时编写的matlab程序代码，基于分段非线性权重值的Pso算法，搭建OFDM通信系统的框架，进行逐步线性回归，进行波形数据分析,最大似然（ML）准则和最大后验概率（MAP）准则，采用偏最小二乘法。( Using wavelet denoising thought, Course designed to prepare the matlab program code, Based on piecewise nonlinear weight value Pso algorithm, Build a framework OFDM communication system, Stepwise linear regression, Waveform data analysis, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, Partial least squares method.)

introduction to nonlinear estimation with EKF and an example in Matlab

i wouldlike to regestedin yu-oursute

ML的方法在ofdm中的应用，是最大似然在ofdm中的仿真(ML method ofdm application is the maximum likelihood in the simulation ofdm)

Convex optimization exercises

q717是验证时域采样与频域采样的对偶性，q718是快速卷积运算(q717 is to verify the time domain sampling and frequency-domain sampling of the duality, q718 is fast convolution)

说明：  直齿轮副啮合刚度计算，周期刚度，包含单双齿啮合。(Spur gear pair meshing stiffness calculation, including single and double tooth meshing.)