buck_converter

利用分步傅里叶方法计算光纤激光器输出脉冲光谱(The use of step-by-step Fourier method pulse fiber laser output spectrum)

此程序是基于哈夫变换的一个圆形检测程序，给定检测边界和半径估计值的范围，此程序能返回圆在图片中的圆心坐标和半径大小。(This program is based on the Hough transform of a circular testing procedures, testing boundaries and radius of a given range of estimates, this procedure can return to the center of the circle in the image coordinates and radius.)

BFSK for modulation in digital signal processing

its a three dimensional clock in vrml .this is the wrl exte.nsion file which can be called in matlab

自回归模型得到的谱与yulear法、burg法、协方差法、改进协方差法等方法得到的谱进行对比 (Autoregression model spectra obtained with yulear method, burg method, covariance method, modified covariance method and other methods to compare the obtained spectrum)

一个相当好用的matlab函数，由美国国家可再生能源实验室科研人员设计，可以计算太阳的直射维度和方位角。只要输入时间、观测地点即可。 (This algorithm is based on numerical approximation of the exact equations. The authors of the original paper state that this algorithm should be precise at+/- 0.0003 degrees. I have compared it to NOAA solar table (http://www.srrb.noaa.gov/highlights/sunrise/azel.html) and to USNO solar table (http://aa.usno.navy.mil/data/docs/AltAz.html) and found very good correspondance (up to the precision of those tables), except for large zenith angle, where the refraction by the atmosphere is significant (difference of about 1 degree). Note that in this code the correction for refraction in the atmosphere as been implemented for a temperature of 10C (283 kelvins) and a pressure of 1010 mbar. See the subfunction un_topocentric_zenith_angle_calculation� for a possible modification to explicitely model the effect of temperature and pressure as describe in Reda & Andreas (2003). )

这是水平地震作用下的加速度反应谱曲线生成方法，请大家看看(Acceleration response spectrum curve)

DVB_T OFDM移动通信系统DVB-T(DVB_T OFDM mobile communication system DVB-T)

ANSIG algorithm to shape recognition

说明：  根据语音信号的特点给出有关滤波器的性能指标：1）低通滤波器性能指标，fp=1000Hz，fc=1200 Hz， As=100dB，Ap=1dB；2）高通滤波器性能指标，fc=2800 Hz，fp=3000 Hz As=100dB，Ap=1dB；3）带通滤波器性能指标，fp1=1200 Hz，fp2=3000 Hz，fc1=1000 Hz，fc2=3200 Hz，As=100dB，Ap=1dB。用IIR对其分析，最后，利用MATLAB中的函数freqz画出各滤波器的频率响应。(This article according to the IIR filter and the FIR filter characteristic, uses the bilinearity method of transformation under the MATLAB bad boundary to design IIR and to design the FIR numeral filter separately with the window box number, and carries on the analysis to the gathering pronunciation signal, and finally gives IIR and FIR to the pronunciation filter effect.)