PCA_face_recognition-_Matlab

混沌序列发生器，一种随机序列的预测！时间序列的分析和预测！(Chaotic sequence generator, a random sequence of the forecast! Time series analysis and forecasting!)

很好的三相电机模型 对初学者认识电机很有帮助(three_motor)

说明：  　 随着微加工技术的发展和日益成熟 ,微型化光谱仪的研究得以快速发展。和传统的 微型光谱仪相比 ,基于调制原理的光谱仪具有高光通量、 高分辨率的性能优势 ,可广泛应用于生物、化学、 医学等许多领域中对微弱辐射信号的探测。介绍了几种类型的调制光谱仪的结构特点和关键技术 ,分析了设计与制作微型调制光谱仪过程中存在的一些关键问题与难点 ,并总结了该领域的研究进展和发展趋势。(　The mat uration of the optical micro2elect ro mechanical systems technology has imp ul sed t he development of t he micro spect rometer . Compared to the t raditional micro spect rometer , t he spect rometer based on modulation can be used in biological , chemical and medical fields to detect t he faint signal s due to it s inherent advantages. An overview of t he development s of t he micro spect rometer based on modulation is presented. The key p roblems in designing and fabricating t he Fourier t ransform spect rometer ( F TS) are discussed , and t he progresses made worldwide in t his field are al so presented.)

网上搜索的关于FrFT的matlab程序，，正在开始研究这方面的，希望对大家有帮助(Online search procedures matlab on FrFT, is being started to study in this regard, )

用矩量法计算半波振子的电流分布、输入阻抗、E面方向图。(Calculated half-wave dipole moment method using the current distribution, input impedance, E plane patterns.)

大家看看就知道了，我也不是很懂这个程序。是有关贝叶斯公式的(Look at the U.S. know, I do not很懂this procedure. Is the Bayesian formula)

基于信道的历史信息来预测不同信道的未来可用时间可以帮助CR选择一个最佳信道进行信息传递。不同的预测准则应用到周期或是随机的开关模式中。一个CR可以学习以往不同信道的模式。我们提出一个简单的分类和学习方法去检测模式的类型和收集需要的信息用于智能信道的选择。MATLAB仿真结果显示提出的方案在随机信道的随机和周期模式中都有优越的表现。随着时间的变化，新到的切换次数减少到55 ，并且延迟时间也相应减少，而吞吐量却在提高。(Prediction of future availability times of different channels based on history information helps a cognitive radio (CR) to select the best channels for control and data transmission. Different prediction rules apply to periodic and stochastic ON-OFF patterns. A CR can learn the patterns in different channels over time. We propose a simple classification and learning method to detect the pattern type and to gather the needed information for intelligent channel selection. Matlab simulations show that the proposed method outperforms opportunistic random channel selection both with stochastic and periodic channel patterns. The amount of channel switches needed over time reduces up to 55 , which reduces also the delay and increases the throughput.)

本书为王永良的《空时自适应信号处理》，供有关人员下载(Wang Yongliang book for the )

很好的短时傅里叶变换的MATLAB程序，适用于初学者。(MATLAB code of short time Fourier transform)

利用双线性Z变换设计巴特沃斯和切比雪夫I型IIR数字滤波器，包括低通、高通、带通、带阻四种形式。使用者只需指定通带、阻带的边缘实际频率及相应的衰减，便可输出数字滤波器 的级联形式的各子系统分子、分母的系数，并输出其幅频和相频响(Bilinear Z transform design Butterworth and Chebyshev Type I IIR digital filters, including low pass, high pass, band pass, band stop four forms. Users simply specify the passband edge frequency stopband actual and corresponding attenuation subsystems can form molecular cascade output digital filter coefficients of the denominator, and the output of its magnitude and phase frequency response)