zhan_fdtd3D

Blobworld:基于期望最大算法的图像分割 及其在图像查询中的应用 (Blobworld: Image segmentation using Expectation-Maximization and its application to image querying)

lab3 : Spatial Filtering

说明：  改进的PRI变换应用于重频正弦调制脉冲序列(Improve the PRI transform to sinusoidal modulation pulse sequence re-frequency)

The model used for creating the reference voltage is shown in Fig. 4. First, photovoltaic output current (Ipv) and output voltage (Vpv) are passed through a first order low pass filter with a magnitude of G = 1 and a time constant of T = 0.01 seconds in order to filter out the high frequency components or harmonics from these signals as shown in Fig. 5 and Fig. 6. The filtered current and voltage signals (Ipv_F and Vpv_F) are then fed into the MPPT control block that uses the Incremental Conductance Tracking Algorithm. An algorithm that is based on the fact the slope of the PV array power curve shown in Fig. 7 is zero at the Maximum Power Point (MPP), positive on the left of the MPP, and negative on the right. The MPP can thus be tracked by comparing the instantaneous conductance (I/V) to the incremental conductance (∆ I/∆ V) [11] as in (1):

filter synthesis -parts of the program, need to be completed later

segmentation code in image processing

说明：  matlab 代码实现控制方面，混沌线性控制，易于实现 (matlab code control, chaotic linear control, easy to implement)

利用matlab程序编写的经验模态分解，介绍了emd方法的应用(emd)

该程序是描述线程的,能够帮助初学者更好的理解线程的实现过程。(this program is about thread in Java.)

文章对几种常用的基于循环前缀(CP)的最大似然同步算法进行了分析，并对其频偏估计方差进行了比较；同 时针对基于CP 的同步算法在多径衰落信道下性能较差的情况，提出了一种改进的CP 同步算法并进行了仿真，结果表明相比 于原ML 算法，文中算法在多径信道下可有效提高频偏估计性能。(】This paper does some research on multiple maximum-likelihood (ML) algorithms based on cyclic prefix (CP) and compares variances of frequency-offset estimation After the analysis of the bad performance of CP based algorithms in multi-path fading channels, an improved CP algorithm is proposed and the simulation shows that this algorithm can improve its performance effectively in multi-path fading channels.)