光伏发电功率波动

说明：  该文档中包含大量代码，首先是一些R语言基本语法练习的，然后是一些机器学习相关的，最后是一些评分卡指标计算、建模相关的。(This document contains a lot of code, first some basic grammar exercises of R language, then some machine learning related, and finally some scorecard index calculation, modeling related.)

说明：  Here, you can find a very good book.

点阵字模工具示例-example

图片画廊和Lightbox特效是一款共有4种不同的布局效果，分别为简单布局，流式布局，网格布局和缩略图布局。(Photo Gallery and Lightbox are four different layout effects: simple layout, streaming layout, grid layout and thumbnail layout.)

可以查看每天的美食推送，具有播放视频功能，留言功能，后台采用Java书写。(You can view the daily food push, with video playback function, message function, background using Java writing.)

提取图片的HOG特征，特征向量为9维，向量存于TXT文件中。(Extract the HOG feature of an image, and the feature vector is 9 dimensions, which is stored in TXT file.)

sample project with web mysql dinamycally

说明：  下垂控制就是选择与传统发电机相似的频率一次下垂特性曲线（Droop Character）作为微源的控制方式，即分别通过P/f下垂控制和Q/V下垂控制来获取稳定的频率和电压，这种控制方法对微网中的微源输出的有功功率和无功功率分别进行控制，无需机组间的通信协调，实现了微源即插即用和对等控制的目标，保证了孤岛下微电网内电力平衡和频率的统一，具有简单可靠的特点(Droop control is to choose Droop Character, which is similar to the traditional generator, as the control mode of micro-source, that is, to obtain stable frequency and voltage through P/f droop control and Q/V droop control respectively. This control method controls active power and reactive power of micro-source output in micro-grid separately, without communication coordination between units. The goal of micro-source plug-and-play and peer-to-peer control is realized, which ensures the unification of power balance and frequency in the micro-grid under isolated islands, and has the characteristics of simplicity and reliability.)

快速FFT变换,C语言的,比较好用,我没试过-Fast FFT transform, C language, comparative ease of use, I have not tried

Flash三维几何图形旋转的实现效果，可有多种几何图形选择，使用了较多的Flash脚本编程技术，对学习actionscript脚本的朋友来说，这些简单的脚本有助于提升as脚本的编程技术。本Flash效果运行截图如上图所示，支持立方体、圆锥、圆环、圆柱、标准正方体5种几何图形的旋转控制。