Pitch-detection-MATLAB

说明：   该程序实现时域LMS算法，并用统计的方法仿真得出不同步长下的收敛曲线( Of the time domain LMS algorithm program implementation and use of statistical methods are not synchronized long simulation shows the convergence curve under)

Leverage Space Portfolio Model

Eigenfunctions of integrable planar billiards are studied — in particular, the number of nodal domains, ν of the eigenfunctions with Dirichlet boundary conditions are considered. The billiards for which the time-independent Schrö dinger equation (Helmholtz equation) is separable admit trivial expressions for the number of domains. Here, we discover that for all separable and nonseparable integrable billiards, ν satisfies certain difference equations. This has been possible because the eigenfunctions can be classified in families labelled by the same value ofm mod kn, given a particular k, for a set of quantum numbers, m, n. Further, we observe that the patterns in a family are similar and the algebraic representation of the geometrical nodal patterns is found. Instances of this representation are explained in detail to understand the beauty of the patterns. This paper therefore presents a mathematical connection

编程仿真连续小推力实现GTO到GEO的三阶段转移过程，其中推力器的推力大小为0.8N，轨道机动的起始点为GTO的远地点。GTO轨道的升交点赤经为0度，近地点角距为90度。 GTO轨道： ph:185km，ah：35786km，i：28.5°，GEO轨道：h：35786km，i：0°。 卫星质量为6600kg，从GTO到GEO，采用5000s的推力器。取地球半径为6378km，g取值为9.8m/s^2(The three stage transfer process from GTO to GEO is realized by simulation and continuous small thrust. The thrust of the thruster is 0.8N, and the starting point of orbital maneuver is the apogee of GTO. GTO orbit RAAN is 0 degrees, 90 degrees for the argument of perigee. GTO orbit: ph:185km, ah:35786km, i:28.5, GEO orbit: h:35786km, i:0. The mass of the satellite is 6600kg, from GTO to GEO, using the 5000S thruster. The radius of the earth is 6378km, and the value of G is 9.8m/s^2)

Reflection Coefficients for an Air-to-Glass Interface

判别分析的码源，怎么说呢，就是好用，推荐下载！！(Discriminant analysis of the source code, how should I say, that is easy to use, recommended download! !)

声子晶体的源程序：圆柱形散射体呈正三角排列的ＸＹ模的程序(Phononic crystal source: cylindrical scattering lanes are arranged in triangular XY model program)

Using magic time-step in a one-dimensional FDTD grid, implement total-field/scattered-field wave-source condition

能够检测异常值 数据降维 特征提取 鲁棒主成分分析方法(Robust PCA)

小波包分析提取振动信号中的特征频率，最终的权值矩阵就是滤波器的系数，可直接计算得到多重分形谱。( Wavelet packet analysis to extract vibration signal characteristic frequency, The final weight matrix is ??the filter coefficient, It can be directly calculated multi-fractal spectrum.)