PageRank三个博客mark http://blog.csdn.net/ianchan1990/article/details/8240905 http://zxxapple.iteye.com/blog/1407141 http://zxxapple.iteye.com/blog/1407199 http://zhiqiang.org/blog/science/computer-science/how-google-search-similar-images.html 图片搜索原理