demodulation

计算声音的旋律，利用了听觉模型和相关函数。(Calculation of the melody of the voice)

采用经典FFT算法对dqpsk信号进行频率估计，并在高斯信道下绘制估计结果图。(The classical FFT algorithm is used to estimate the frequency of DQPSK signal, and the estimation result graph is drawn in the Gaussian channel.)

无网格伽辽金法，主程序，结合以上传的前两个程序来使用，算杆的应力，和位移！(element-free Galerkin method, main program, a combination of the first two upload procedures to use, operator of stress and displacement.)

这是用matlab实现的数据分析和统计程序，包括：用线性回归法估计一个因变量与多个自变量之间的线性关系，用多项式回归法估计一个因变量与一个自变量之间的多项式关系等 (This is achieved using matlab data analysis and statistical procedures, including: linear regression estimation one dependent variable with more than a linear relationship between the independent variables, polynomial regression is estimated that a dependent variable and an independent variable of the polynomial relationship between the)

matlab simulink matlab simulink (matlab simulink matlab simulink )

利用MUSIC算法估计TOA，是一个比较简单的例子。(Use MUSIC method to estimate TOA)

说明：  遗传算法是计算数学中用于解决最佳化的搜索算法，是进化算法的一种。进化算法最初是借鉴了进化生物学中的一些现象而发展起来的，这些现象包括遗传、突变、自然选择以及杂交等。遗传算法通常实现方式为一种计算机模拟。对于一个最优化问题，一定数量的候选解（称为个体）的抽象表示（称为染色体）的种群向更好的解进化。传统上，解用二进制表示（即0和1的串），但也可以用其他表示方法。进化从完全随机个体的种群开始，之后一代一代发生。在每一代中，整个种群的适应度被评价，从当前种群中随机地选择多个个体（基于它们的适应度），通过自然选择和突变产生新的生命种群，该种群在算法的下一次迭代中成为当前种群。(Genetic algorithm (GA) is a search algorithm used to solve optimization in computational mathematics. It is one of evolutionary algorithms. Evolutionary algorithms were originally developed by borrowing phenomena in evolutionary biology, such as heredity, mutation, natural selection and hybridization. Genetic algorithms are usually implemented as a computer simulation. For an optimization problem, an abstract representation of a certain number of candidate solutions (called individuals) (called chromosomes) evolves towards a better solution. Traditionally, solutions are represented in binary (that is, strings of zeros and ones), but other representations are possible. Evolution begins with a population of completely random individuals, and it happens from generation to generation.)

利用反馈控制可以将洛伦兹系统控制到任意状态(control Lorenz system to arbitrary state using feedback control)

求jeffcott转子模型的临界转速的matlab编程(Seeking jeffcott critical speed of the rotor model matlab programming)

忽略系统阻尼，建立工程车辆的扭转振动模型，进行振型分析。(Ignoring the system damping, the engineering vehicle torsional vibration model is established to do the vibration analysis.)