关于奇异值分解和特征值的一篇文章，解释的非常清楚
http://www.cnblogs.com/LeftNotEasy/archive/2011/01/19/svd-and-applications.html
SVD分解教程，SVD到底是怎样工作的
http://www.puffinwarellc.com/index.php/news-and-articles/articles/30-singular-value-decomposition-tutorial.html
奇异值分解的应用：LSA，潜在语义分析
http://blog.csdn.net/wangran51/article/details/7408406
LSA教程，入门文章
http://www.puffinwarellc.com/index.php/news-and-articles/articles/33-latent-semantic-analysis-tutorial.html