dwesprit

说明：  提出了正交频分复用(O FDM ) 系统中一种新的载波频偏估计算法L 载波频偏估计过程可分 为获取和跟踪, 其中, 获取过程和时间同步是同时完成的L新算法可实现的最大载波频偏获取范围 是整个信号带宽的一半L新的跟踪算法是一个最大似然算法, 在加性白噪声高斯信道(AW GN ) 下, 当N (训练序列长度的一半) 等于128 时, 其性能比Schm idl 算法提高约7127 dB 在多经信道下, 当 信噪比不是很高时, 新算法仍具有优势L(new carrier f requency offset est imat ion scheme in o rthogonal f requency division mu lt ip lex ing (O FDM ) system is p ropo sed. The carrier f requency offset est i2 mat ion includes acqu isit ion and t rack ing, and acqu isit ion as w ell as t im ing synch ro2 n izat ion can be perfo rmed simu ltaneou sly w ith h igh accu racy. The max imum acqu i2 sit ion range can be up to one half of overall signal bandw idth. The p ropo sed t rack2 ing est imato r is a max imum 2likelihood est imato r, and in AW GN channel, abou t 7127dB imp rovemen t is ob tained compared to the Schm idl’s algo rithm w hen N = 128 in mu lt ipath channel, the p ropo sed algo rithm wo rk s w ell at moderate SNR.)

　计算机人脸识别技术( Face Reocgnition)就利用计算机分析人脸图像,从中提取出有效的识别信息,用来辨认身份的一门技术。[ 1 ]即对已知人脸进行标准化处理后,通过某种方法和数据库中的人脸样本进行匹配,寻找库中对应人脸及该人脸相关信息。人脸自动识别系统有两个主要技术环节,一是人脸定位,即从输入图像中找到人脸存在的位置,将人脸从背景中分割出来,二是对标准化后的人脸图像进行特征提取和识别。本文中介绍的PCA (特征脸)方法就是一种常用的人脸 特征提取方法。(Computer Face Recognition Technology (Face Reocgnition) on the use of computer analysis of facial image, to extract the valid identification information used to identify the status of a technology. [1] that is known to standardize treatment of face, through a method and a database of face samples for matching, search library, the corresponding face and the face-related information. Automatic face recognition system has two main technical aspects, first, face location, that is, from the input image to find the location of the face there, the faces will be split out from the background, the second is, the standard features of face images extraction and recognition. Described in this paper PCA (Eigenfaces) method is a common facial feature extraction method.)

matlab本科 长江大学 地球物理与石油资源学院 ppt(matlab Yangtze University Undergraduate courseware)

隐马尔科夫过程预测编码，对于使用或研究隐马尔科夫模型的人会有帮助。(Hidden Markov process predictive coding, for the use of hidden Markov models or research who will help.)

ABAQUS vumat subroutine for user defined materials using Hashin 3D Failure criterion model in finite element simulation

对如下可靠性问题进行仿真 现在有两种方案：方案一是损坏一个更换一个；方案二是一旦有轴承损坏就全部更换．试通过计算机仿真对这两种方案做出评价．(The following issues on the reliability of simulation now there are two programs: a program to replace a damaged one program Second, once all the replacement of damaged bearings. Examination by computer simulation to assess the two programs.)

three phase induction motor

matlab实现的模式识别的分类器：fisher 与bayes 分类器，实现男女性别的分类.(matlab implementation of the pattern recognition classifier: fisher and bayes classifier, to achieve gender classification.)

在信号分析中，我们常把信号进行矢量分解，也就是将信号分解为频率相同、峰值幅度相同但相位相差90的两个分量。该程序实现将信号分解为I路和Q路。(In signal analysis , we often decompose the signal vector , that is, the signal is decomposed into the same frequency , the peak amplitude of phase 90 of the same, but the two components . The program implementation will signal into I and Q branches .)

IIR滤波器的matlab实现，包括butter，cheb1,cheb2(The realization of IIR filter matlab, including butter, cheb1, cheb2)