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：滤波 fs=400 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=5 时间窗大小 t=0:ts:T (hf1=zeros(1,N) hf1(f<=B1&f>=-B1)=1 y1=hf1.*fftshift(y) figure subplot(211) plot(f,abs(fftshift(y))/N,f,hf1, r-- ) axis([-fs/2,fs/2,0,1.2]) title( 原信号频谱 ) xlabel( f /Hz ) subplot(212) plot(f,abs(y1)/N) title( 低通滤波，截止频率90Hz ) xlabel( f /Hz ))

运行程序，单击“启动线程”按钮，程序将启动一个线程，线程将进行数值计算，并将结果发送给主窗口；单击“挂起线程”按钮，线程将挂起；单击“恢复线程”按钮，线程将恢复。(Run the program, click" start the thread" button, the program will start a thread, the thread will make numerical computation, and sends the result to the main window click" thread hang" button, the thread will be suspended click on" restore thread" button, the thread will recover.)

MIDI转换软件 用于MP3产生midi(MIDI to MP3 conversion software generate midi)

中国一号信令线路信令中国一号信令线路信令(digital channel associater exchange line signalling public network, standard)

数字识别之网络神经算法，功能强大，十分好用。希望和大家共享。(Digital Identification of neural network algorithm, a powerful, very easy to use. Would like to share.)

用visual C++开发的图像匹配与处理系统，包括图像处理与图像匹配算法，NCC,梯度强度相关，互信息匹配等(With visual C++ development of image matching and processing systems, including image processing and image matching algorithm, NCC, gradient strength related mutual information matching)

stm32输出四路pwm，能完成占空比可调，频率可变化的pwm(Stm32 four road PWM output, can finish the duty ratio is adjustable, can change the PWM frequency)

PIC16F684程序按键识别. 中断方式识别(KEY PROGRAM)

poa算法，关于梯级水电调度的c#算法源程序。适合梯级水电站短期优化调度(The algorithm, on the dispatch of cascade c# algorithm source program. For the short-term optimal scheduling of cascade hydropower stations)

c++的有限元源码,带说明书和测试数据,是难得的有限元开发资料.(This is the code of finite element method, with manual document and data samples, it is valusble for FEM development)