2d-FDTD

说明：  ABAQUS材料本构的二次开发讲解，详细说明。(Introduction to the secondary development of ABAQUS material constitutions.)

说明：  粒径级配的分形维数计算方法，基于筛分实验结果的分形维数计算。(fractal dimention calculating according grain size distribution by the sieving analysis)

说明：  基于自相关算法的通信系统中微弱信号检测程序(Weak Signal Detection Program in Communication System Based on Autocorrelation Algorithms)

固定翼无人机仿真平台，可以进行算法测试，进行姿态控制，以及位置控制(Fixed wing UAV Simulation Platform, which can be tested for algorithm)

说明：  根据舰船螺旋桨噪声一书给出的计算空泡噪声的公式，简便计算各种条件下的螺旋桨噪声级的程序(According to the formula for calculating the cavitation noise given in the book "Propeller Noise of Ships", the program for calculating the propeller noise level under various conditions is simple and convenient.)

KTV点歌系统：包括拼音点歌、分类点歌、排行点歌、字数点歌。本系统由北大青鸟学员所作！(KTV VOD system: including Pinyin song, classification VOD Top song, word song. This system made by the Beida Jade Bird trainees!)

用于abaqus建模内聚力单元建模，通过内聚力单元分析材料损伤(Used for abaqus modeling, the cohesion unit is used to analyze material damage)

说明：  固定资产管理系统,会员管理结合了Asp.net2.0中的MemberShip，还应用了SiteMap和master文件等.(Fixed Assets Management System, membership management combines Asp.net2.0 the MemberShip, has also applied the SiteMap and master files.)

学习编写EA的基本内容，了解编写EA的基础方法。(Learn to write the basic content of EA and understand the basic method of compiling EA.)

STM32F4与ADXL355通过SPI通信。(STM32F4 and ADXL355 via SPI communication.)