This file forms an estimate of the frequency spectrum using eigenvector algorithm (Johnson & DeGraaf 1990).

I upload this paper in the hope of leting other people have a better understading about the usage of Wireless Sensor Network. I love WSN, and thanks to the authors: Geoffrey Werner-Allen, Konrad Lorincz, and Matt Welsh Harvard University

这个是一个计数器的程序，能够帮助初学者有效的理解计数器(This is a counter program, can help beginners effectively understand the counter)