chapter9

时频分析技术及其应用——随书光盘源码.rar(Time frequency analysis technology and Its Application-- source CD with the book)

UN PROGRAMM DE BRUSHLESS DC MOTOR IN M FILE PART 3

变频调速是改变电动机定子电源的频率，从而改变其同步转速的调速方法。变频调速系统主要设备是提供变频电源的变频器，变频器可分成交流-直流-交流变频器和交流-交流变频器两大类，目前国内大都使用交-直-交变频器。(Variable frequency speed regulation is the frequency of changing the stator power supply of the motor, thus changing the speed regulation method of the synchronous speed.Variable frequency speed regulation system is the main equipment to provide frequency conversion power of inverter, the inverter can be divided into ac - dc - ac frequency converter and ac - ac frequency converter two kinds big, cross - straight - to pay inverter are mostly used in China at present.)

hough 变换实现直线检测 在噪声服从高斯分布的背景中构造信噪比为2、长度为34像素的目标线段；在找出线段所在直线后，在采用固定长线段滑动的方法，确定线段的起始点，最终确定线段的确切位置。(hough transform line detection in the noise to obey Gaussian distribution of the background-noise ratio for the structure 2, with a length of 34 pixels of the target segment at to find out where the straight line segment after the introduction of fixed long-term method of sliding paragraph to determine the segment of starting point, and ultimately determine the exact location of line segments.)

说明：  该文件给出了CDMA系统的仿真程序，对通信系统的各方面性能给出评估(The document gives the CDMA system simulation program, all aspects of the communication system performance evaluation is given)

三维血管重建——通过将文件转换为MATLAB矩阵，并缩取小矩形。。。(Three-dimensional vascular reconstruction)

自举是一种由重采样估计，独立和（蒙特卡洛重采样）等概率设置一个单一的数据统计变化的一个途径。允许的措施估计那里的潜在分布是未知的或者样本量很小。他们的结果与这些分析方法的统计特性相一致。 在这里，我们使用非参数逼近。非参数引导更简单。它不使用该模型的结构，建造人工数据。矢量[易西]是重采样，而不是直接与replecement。这些参数是从这些对构建。 二，回归模型时，应使用在回归方程中的两个变量是随机的，会有错误的，即不是由研究者控制。模式，我用普通最小二乘回归低估了变量之间的错误时，他们都含有线性关系的斜率。据索卡尔和罗尔夫（1995），模型二回归的主题是一对哪些研究和争论仍在继续，最终建议是很难做出。 BOOTGMREGRESS模型II是一个引导程序。这需要s引导和规范样品前坡计算变量。这两个变量的每个转化为具有零均值和标准差的一个。由此产生的斜率是线性回归系数的Y在X里克创造了这个词（1973）几何平均数并给出了一个模型II回归广泛审查。它也被称为引导标准的主要轴线(The bootstrap is a way of estimating the variability of a statistic from a single data set by resampling it independently and with equal probabilities (Monte Carlo resampling). Allows the estimation of measures where the underlying distribution is unknown or where sample sizes are small. Their results are consistent with the statistical properties of those analytical methods. Here, we use the Non-parametric Bootstrap. Non-parametric bootstrap is simpler. It does not use the structure of the model to construct artificial data. The vector [yi, xi] is instead directly resampled with replecement. The parameters are constructed from these pairs. Model II regression should be used when the two variables in the regression equation are random and subject to error, i.e. not controlled by the researcher. Model I regression using ordinary least squares underestimates the slope of the linear relationship between the variables when they both contain error. According to Sokal and Rohlf (1995), t)

it is the nlms algorithm for the echo cancellor

极化码在高斯信道下CA——SCL译码算法(CA - SCL decoding algorithm for polarization code in Gauss channel)

小波阈值去噪，小波变换是一种信号的时间——尺度（时间——频率）分析方法，它具有多分辨分析的特点，而且在时频两域都具有表征信号局部特征的能力(Wavelet threshold denoising)