powerSpectrumEstimation_APES

本文的程序实现在屏幕上随机产生不同大小的雪花，并以不同的速度下降。相对于第一版，它在很多性能上做了优化，直接在桌面的上下文中绘制雪花。而且，现在也通过RedrawWindow，实现在桌面的图标(如任务栏)上绘制雪花了。你可以用它来学习GDI。(Falling Snow on Your Desktop! Part II This article explains how to create an application that makes it snow on the desktop. Since my previous article was published, I received many user inquiries about how to improve the program. This article demonstrates how to create snow flakes that fall on your desktop, by using the draw functions directly in the desktop context. When the application starts, it creates an array of snow flakes and starts the timers for each flake. Manipulation of the RedrawWindow function allows the drawing of flakes behind and over the desktop icons, making the application more impressive. )

说明：  Delaunay和受限Delaunay三角网在Java中提供高性能的工具，支持Lidar LAS文件、数字高程模型(DEM)、有限元分析、路径规划和不规则三角网(TIN)的其他应用，为曲面建模提供高性能实用工具。(Delaunay and Constrained Delaunay Triangulations in Java, providing high-performance utilities for modeling surfaces with support for Lidar LAS files, Digital Elevation Models (DEM), finite element analysis, path planning, and other applications of Triangulated Irregular Networks (TIN))

船舶扭振计算的例程，船的轴系较复杂，所以大多数例子都是关于船舶的！(an example of ship torsional vibration)

图像增强的理论性知识，对于初学matlab有很大的帮助，希望对大家有用(Image enhancement of theoretical knowledge, great for the beginner matlab help, we hope to be useful)

加窗傅里叶变换（windowed fourier transform_guassian）取高斯窗。(Windowed Fourier transform (windowed fourier transform_guassian) take the Gaussian window.)

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):

汽车七自由度改编的振动程序，采用对比方法比较了《汽车振动分析》里面的振动程序，欢迎大家下载学习与交流(vibration of the car with seven degrees)

说明：  无约束一维极值问题中的抛物线和三次插值法，例程可调(Unconstrained extremal problem in one-dimensional parabolic and cubic interpolation method, routine adjustable)

sep protocol where no direct transmission is allowedto base station even if it is near to base station

正交频分复用(OFDM)是第四代移动通信的核心技术,它是实现多媒体业务发展的基础.讨论了如何利用Simulink进行OFDM系统仿真,并给出了具体的仿真模型.利用仿真模型得到OFDM差错性能分析结果,通过对结果的分析,提出了改善性能的方法. (Orthogonal frequency division multiplexing (OFDM) is the core of the fourth generation mobile communication technology, it is the basis for the development of multimedia services. Discusses how to use Simulink for OFDM system simulation, and given the specific simulation model. Using the simulation model OFDM Error Performance Analysis of the results obtained through analysis of the results, proposed to improve performance.)