momentum

简单介绍雨滴的形成，运用流体力学相关知识，分析了雨滴下落所受的黏性阻力和压差阻力，考虑雨滴在空气中下落半径增加对雨滴速度的影响，得出了雨滴下落速度和雨滴半径的关系，对雨滴下落的收尾速度进行了一般的讨论。(Brief rain formation, the use of the knowledge of fluid mechanics, analysis of viscous drag and pressure drag the raindrops whereabouts suffered consider raindrops in the air, the whereabouts of the impact of increasing the radius of raindrops speed, to draw raindrops falling speed and raindrops radius the general analysis of the relationship between the terminal velocity of raindrops whereabouts.)

主分量分析是一种基本的多维数据描述方法，是一种能使多维数据按照实际研究的需要更好地描述出来的变换方法。(Principal component analysis is a basic description of the method of multidimensional data is a multidimensional data in accordance with the needs of the actual research to better describe the transformation method can make.)

能够实现LL(1)预测分析过程的源码，有测试用例(To achieve LL (1) Prediction of the process of source code, there are test cases)

说明：  空间数据索引技术的描述，初学者可以进行简单的了解(Description of spatial data indexing technology, beginners can be a simple understanding of)

一些简单最优化方法的matlab实现，及一些方法(Some simple optimization method matlab implementation)

用MATLAB/SImulink 搭建的单相光伏并网逆变器仿真，用PR电压环控制器进行控制(Single-phase photovoltaic grid-connected inverter simulation with MATLAB/SImulink, control with PR voltage ring controller)

在matlab中实现哈夫曼压缩和解压缩。(Huffman compression and decompression in matlab.)

IEEE 802.11ac 协议草案2012年5月版本。正式版本大概是2014年初才能确定。(IEEE 802.11ac draft version of the agreement in May 2012.)

st出的关于电磁兼容EMC信息的手册,比较有用,推荐给大家(st on the EMC information manuals, more useful and recommend it to everyone )

暖通空调建筑环境仿真计算室内舒适性PMV源代码，可以由六个参数计算出舒适性的大小(HVAC building environment simulation calculation of indoor comfort PMV source code, can be calculated the six parameters of the size of comfort)