hurst parameter: 給入一序列的資類，程式會畫出husrt 參數的figure和估計值 例 hurst_expo(sin(0:0.01:5*pi)) -hurst parameter: the sequence into a category of funding, the program will draw the figure and husrt parameter estimates were hurst_expo (sin (0:0.01:5* pi))

直接转矩控制无刷直流电机的matlab仿真程序，PI闭环调节-Direct torque control brushless DC motor matlab simulation program, PI closed loop control

蒙特·卡罗方法（Monte Carlo method），pi计算程序，适用于入门学习者。统计模拟方法。-Monte Carlo (Monte Carlo method), pi calculation program for entry-learners. Statistical simulation method.