caculation

设计的带通滤波器方法 改变参数就行了 里面有几种方法(designed band pass filter change of parameters on a trip inside there are several ways)

说明：  用级数PI/4 = 1 -1/3 + 1/5 -1/7+…求PI的近似值，要求取前1000项来计算。(With a series PI/4 = 1-1/3+ 1/5-1/7+ ... seeking an approximation of PI, demanded before the 1000 data.)

说明：  可用来求解大变形悬臂梁的程序，十分方便简洁，精确(to figure out the deformation of the cantileaver beam)

使用matlab计算pid系数的程序，文档包含了程序的说明和pid的一些理论。(Pid coefficient calculated using the matlab program, the document includes a description of the procedures and some of the theories pid.)

《matlab仿真技术与应用》清华大学出版社，强烈推荐，很不错一本书()

扩频同步时频域二维分布 R=[x,y] surf(R) x:-5:0.1:5 y:-0.01:0.005:0.1(Synchronous time-frequency domain spread spectrum two-dimensional distribution of R = [x, y] surf (R) x:-5:0.1:5 y:-0.01:0.005:0.1)

direct torque control of bldc with low torque ripple

说明：  有关矢量信号处理的基本仿真，得到声压功率谱，x,y.z各方向声强谱(Vector signal processing related to the basic simulation，underwater acoustic)

MATLAB_SIMULINK在电力系统工程仿真中的应用，本书对电力系统仿真的各元器件进行了详细的介绍，同时采用大量案例，学习simulink在电力系统仿真很容易上手。(MATLAB_SIMULINK in power systems engineering simulation applications, this book on the power system simulation carried out for each component in detail, while using a large number of case study in the power system simulation simulink very easy to use.)

利用TENT混沌信号进行调制的混沌通信DCSK，调制与解调系统(TENT chaotic signal is modulated chaotic communication DCSK, modulation and demodulation system)