approximate-principle

双音多频编解码系统，用于产生双音多频信号，并由双音多频信号解码出对应的按键(DTMF codec systems, used to generate DTMF signal by the DTMF signal decoding keys corresponding)

matalb经典算法，包括代数方程组的解法，微分方程实验，优化问题实验(matalb classical algorithms, including the solution of algebraic equations, differential equations experiment, experimental optimization)

说明：  基于matlab神经网络工具箱bp神经网络在去噪声方面的应用。(Applications based on neural network toolbox matlab bp neural networks to noise aspects.)

再matlab上实现基于扩频的数字水印。图像处理(This is a simple spread-spectrum based informed watermarking implementation in MATLAB. )

无约束多维极值问题的描述，提供了几种解决方案(very good)

本资源是matlab精密单点定位后处理方法的源代码(This resource is the precise point positioning matlab source code approach)

cell coordinates for algebraic reconstruction techniques algorithm

前一段时间我有睡眠问题。我曾经躺在床上，盯着天花板，几个小时。后来有一天，我的外婆建议我试着数羊后，我已经上床睡觉。与往常一样，当我的奶奶暗示的东西，我决定尝试一下。唯一的问题是，有没有羊的时候，我就去睡觉各地进行计数。 创意，因为我，这是不会阻止我。我坐下来写，使得字符，其中＃代表羊的网格，而计算机程序。草（或任何你喜欢的，只是没有羊）。为了使计算更有趣，我也决定要数绵羊，而不是单一的成群的牛羊。两只羊在同一个群，如果他们都有一个共同的一面（上，下，左或右）。另外，如果羊A是在同一羊群如羊B和羊B处于同一羊群如羊℃，然后羊A和C是在同一个群。 现在，我已经有了一个新的问题。虽然这些计数羊居然帮我睡着了，我觉得这是非常无聊的。为了解决这个问题，我决定我需要做的计数为我另一台计算机上的程序。然后，我就可以只启动这两个程序之前，我去睡觉，我会睡个好觉，直到没有任何干扰的早晨。我需要你给我写的这个程序。(A while ago I had trouble sleeping. I used to lie awake, staring at the ceiling, for hours and hours. Then one day my grandmother suggested I tried counting sheep after I d gone to bed. As always when my grandmother suggests things, I decided to try it out. The only problem was, there were no sheep around to be counted when I went to bed. Creative as I am, that wasn t going to stop me. I sat down and wrote a computer program that made a grid of characters, where# represents a sheep, while . is grass (or whatever you like, just not sheep). To make the counting a little more interesting, I also decided I wanted to count flocks of sheep instead of single sheep. Two sheep are in the same flock if they share a common side (up, down, right or left). Also, if sheep A is in the same flock as sheep B, and sheep B is in the same flock as sheep C, then sheeps A and C are in the same flock. Now, I ve got a new problem. Though counting these sheep actually helps me fall asleep, I find)

说明：  OFDM的信道估计，LS,MMSE,非常全的仿真程序(OFDM channel estimation, LS, MMSE, very complete simulation program)

deal with matlab source, matlab toolbox