DOAofMUSIC

说明：  整个系统分为数据采集和数据分析两大部分，以友好的图形界面与用户进行交互沟通。 声音数据采集部分实现数据采集功能,根据用户选择的采样频率和预设的采样时间来从声卡获得用户需要的数据。并且将采集到的数据及其频谱图以图形方式很直观的呈现于用户面前。 图像采集分析部分，读入图像后，根据选择，对其进行Linear Conformal、Affine、Projective、Polynomial、Piecewise Linear、Sinusoidal、Barrel、Pin Cushion变换(The whole system is divided into data collection and data analysis of two parts, with a friendly graphical interface to communicate with the user interaction. Sound data collection part of the data collection function, according to user-selected sampling frequency and sampling time to the default user from the sound card to obtain the data needed. And the collected data and the spectrum is very intuitive graphically presented in front of the user. Image acquisition and analysis section, read the image, based on the choice of its Linear Conformal, Affine, Projective, Polynomial, Piecewise Linear, Sinusoidal, Barrel, Pin Cushion Transformation )

通过MATLAB程序，进行语音信号处理里面的基于MMSE的谱减法增强处理程序，程序消除噪声的效果是现有算法的3dB，特别的对于 qiiZDo格式和 NbGjUXi 格式的语音处理效果很好。(By MATLAB program for speech signal processing inside the MMSE-based spectral subtraction enhancement program, the program to eliminate the effect of noise existing algorithms 3dB, special effects for speech processing qiiZDo format and NbGjUXi format well.)

利用载波移相调制产生pwm波，驱动开关管，实现五电平( Using carrier phase shift modulation to generate PWM wave, drive the switch tube, realize the five level Using carrier phase shift modulation to generate PWM wave, drive the switch tube, realize the five level )

说明：  同态滤波使图像亮度较暗的区域变得可见，而高亮区也变得更加清晰，对比度增强，图像可视化程度增加。(homomorphic filtering )

backpropagation for Neural network

基于matlab的声音信号采集，分析处理，包括声卡采集，及浏览系统文件(Based on matlab voice signal acquisition, analysis and processing, including card acquisition, and browse system files)

model of 7-segment display in matlab/simulink

说明：  一个有用的自适应算法，递推最小二乘算法。(a useful adaptive algorithm,RLS.)

可以对周期信号进行傅里叶单边谱分析和双边普分析，提取谐波分量(Fourier spectral analy sis can be unilateral and bilateral analysis)

Spread spectrum merupakan sistem dimana sinyal yang dikirimkan memiliki bandwidth yang jauh lebih lebar daripada bandwidth sinyal informasinya sendiri. Proses pelebaran bandwidth sinyal informasi ini dilakukan pada sisi pengirim dan disebut spreading. Sebaliknya, proses penyempitan kembali bandwidth sinyal informasi dilakukan di sisi penerima, dan disebut despreading. Pada gambar 1 berikut menunjukkan proses yang terjadi pada sistem spread spectrum.