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这是一段matlab程序，主要目的是为了完成连续潮流下的极限问题(This is a matlab program, the main aim is to achieve continuous trend in order to limit the problem)

匹配滤波的实际仿真程序。分别对宽带和窄带信号进行了仿真，并且求的滤波后信号的信噪比。(Matched filtering of the actual simulation program. Separately for broadband and narrowband signals, simulation, and after filtering for signal-noise ratio.)

基于MATLBA的无刷直流电机仿真，使用新版MATLAB可以运行(MATLBA-based simulation of the brushless DC motor, using the new version can run MATLAB)

QPSK在加性高斯白噪声环境下，信噪比和误码率的仿真。 先产生一个四组符号的序列，再将该序列映射到对应的相位上。用相应的函数产生均值为零、方差为δ2的加性高斯噪声。 (QPSK the additive white Gaussian noise environment, and the signal-to-noise ratio of the simulation. First group have a four symbols of sequence, then this sequence mapped to the corresponding phase on. With the corresponding function have zero mean and variance of 未2 additive white Gaussian noise.)

Most practical filters exhibit steady roll-off characteristic, in contrast to the sharp transition from the pass and stop bands. The important families of filters are: Butterworth, Chebyshev and Elliptic. As part of this lab, we study and design Butterworth filters. Butterworth filters are simple to design and have a maximally flat pass band response. In contrast the Chebyshev and Elliptic filters are difficult to design and have ripples in pass/stop band but have sharper roll off characteristics than Butterworth filters.

说明：  固定提前角法跟踪的数学模型及其仿真程序代码。(A fixed angle in advance of the mathematical model for tracking and simulation code.)

book on programming in crystal report

MPC cody of a dc motor

Introductory Finite Difference Methods for PDEs

FDTD程序关于一维时域有限差分法（分层介质，反射，透过系数-FFT）(1-D FDTD code with simple radiation boundary conditions)