摘要
面对实时网络信息过滤的新挑战,自适应信息过滤基本上能够解决问题。针对现有自适应系统的不足,本文提出提高模板准确性的学习和过滤阈值优化的新方法。改进的过滤策略过滤初期采用SVM算法,中后期采用改进的自适应模板过滤法。模板的更新采用改进的模板系数调整策略,并引入特征衰减因子来提高过滤的准确率。该系统运行于一个校园网关上,取得了较好的结果。
In order to meet needs of the real-time information filtering,experts put forward adaptive information filtering method.But there are still some difficulties in training and adaptive learning.This paper proposes a new method to improve the accuracy of the adaptive filtering model and optimize the filtering threshold.The filtering strategy uses SVM at initial filtering stages and uses the improved adaptive template-based algorithm in latter stages.In order to update profile,it uses the improved coefficient adjustment strategy,and uses the feature attenuation factor.Running on a gateway in the campus,this system has achieved good results.
出处
《计算机与现代化》
2010年第9期48-52,共5页
Computer and Modernization
关键词
网页过滤
自适应信息过滤
语义倾向
Web page filtering
adaptive information filtering
semantic orientation
