这些代码可以实现网页背景的动态变换，使整个网页的效果特别富于变化，非常生动，我个人在制作中经常使用这种方法。-these codes can achieve dynamic website transform the background, the effect of the whole page special dividend changes, very vividly, I personally made frequent use of this method.

运用数字信号学基本原理实现语音信号的处理，在matlab7.0环境下综合运用信号提取，幅频变换以及傅里叶变换、滤波等技术来进行语音信号处理。-Learn the basic principles of the use of digital signal processing to achieve the speech signal in the integrated use of signal extraction matlab7.0 environment, amplitude-frequen