chapter4

设计一个数字滤波器，在频率低于 的范围内，低通幅度特性为常数，并且不低于0.75dB。在频率 和 之间，阻带衰减至少为20dB。 (1)试求满足这些条件的最低阶Butterworth滤波器。(Design a digital filter, in the range of frequencies below the low-pass amplitude characteristic is constant, and not less than 0.75dB. Between the frequency and stop-band attenuation of at least 20dB. (1) Determine the lowest-order Butterworth filter to meet these conditions.)

基于四个移位寄存器的最小二乘递推算法辨识程序(Shift register based on the four identification procedures recursive least squares algorithm)

说明：  傅里叶变换能将满足一定条件的某个函数表示成三角函数（正弦和/或余弦函数）或者它们的积分的线性组合。利用傅里叶变换可对语音信号消噪。(ourier transform to meet certain conditions can be expressed as a function of trigonometric functions (sine and/or cosine functions), or their integral linear combination. Fourier transform to denoising the speech signal.)

个多目标跟踪的matlab代码，里面附有说明文档。其中背景差分法可以实现实时更新。该代码在检测与跟踪少量目标时效果很好，但是跟踪目标大于8后，效果下降很多(matlab)

CVX的使用方法 它是一种很有用的MATLAB工具(CVX to use it is a very useful tool for MATLAB)

双曲型方程Lax-Wendroff的差分格式程序(Matlab)，非常好的例子，具体算例，有理论分析，解题过程分析，Matlab代码，注释清晰明了，有计算结果输出和图形显示，按照Word文档说明，很快就能学会，操作简单明了，非常适合新手学习。(Lax-Wendroff hyperbolic equation difference scheme (Matlab) program, a very good example, specific examples, theoretical analysis, problem-solving process analysis, Matlab code, comments clear, with the output results and graphical display, according to the Word documentation, and soon will be able to learn, easy to understand, very suitable for beginners to learn.)

说明：  使用蛙跳算法来解决一个工厂流程问题的事例(Frog hopping algorithm solves factory process problems)

this is a matlab implementation for som network

qrs detection in ECG signals

closed loop control of flyback converter