这是一个求解数学问题：半径计算圆的周长和面积

一维光子晶体的能带结构模拟，易于理解光子晶体的特性！-one-dimensional photonic crystal band structure simulation, easy to understand the characteristics of photonic crystal!

Description:  This application functions as a packet error rate (PER) tester.  One node is set up as transmitter and the other as receiver. The role and  configuration parameters for the PER test of the node is chosen on initalisation  by navigating the joystick and confirm the choices with S1.  The configuration parameters are channel, burst size and tx power. Push S1 to  enter the menu. Then the configuration parameters are set by pressing  joystick to right or left (increase/decrease value) and confirm with S1.

有限元算法。平面绗架结构的有限元分析，包括计算每个节点的作用力。可以实现不同位置，不同载荷力的有限元分析。文件中的word文档，包括有具体实例计算。请阅读后使用。-Finite element method. Planar lattice structure of finite element analysis, including the calculation of the force on each node. Can be achieved at different locations, different power load finite element analysis. Document word document, including specific examples of the calculation. Please read before use.

椭圆曲线的定义：     一条椭圆曲线是在射影平面上满足方程     Y2Z+a1XYZ+a3YZ2=X3+a2X2Z+a4XZ2+a6Z3   的曲线.   一个利用椭圆曲线进行加密通信的过程： 1、用户A选定一条椭圆曲线Ep(a,b)，并取椭圆曲线上一点，作为基点G。 2、用户A选择一个私有密钥k，并生成公开密钥K=kG。 3、用户A将Ep(a,b)和点K，G传给用户B。 4、用户B接到信息后 ，将待传输的明文编码到Ep(a,b)上一点M（编码方法很多，这里不作讨论），并产生一个随机整数

资源描述 Design a program to implement the 1-D FFT algorithm. Input: a vector. Get the testing data in file ‘Project_2_test’. Output: a vector, which is the discrete Fourier transform of the input. For example: Input: 3 8 10 12 Output: 33.0000+0.0000i -7.0000+4.0000i -7.0000+0.0000i -7.0000-4.0000i Requirements:

有限单元法原理与应用 第2版(朱伯芳)是有限元书籍中比较经典的一本，包含了杆系、平面、空间单元的原理与应用，涉及流体力学，热传导，混凝土徐变，弹性稳定，大位移，断裂问题等等。-Finite element method and application of Principle 2 (Zhu Bofang) is the finite element books more classic one, including the bar, flat, space modules and application of the principles involved in fluid mechanics, heat conduction, concrete creep, elastic stability, large displacement, fracture, etc..

这个是常用的数字计算,非常有用的啊,建议大家学习学习-This is commonly used figures, ah very useful, it is recommended everyone learn

用于求解环境污染物在地下水中迁移规律的解析解-for solving environmental pollutants in the groundwater migration laws of the analytic solution

一个动态刷新和现实的数据的类，有单通道显示波器，功能比较强大，该类可以继承和优化

算法分叉的discraete系统，它可以用来计算分岔和lypunov expnontes动态系统