一个宠物用品网站，前台美工不错，大气。后台用户管理、产品管理、留言管理等。-A pet products website, the prospects of good art, atmosphere. The background of the user management, product management, message management.

一种基于PET的信源数量估计算法，有很好的学习价值-A source number estimation algorithm based on pet, have good learning value