【摘要】 针对目前内容过滤系统中存在的问题，借鉴人工智能领域中基于范例推理（CBR ）的机制，提出了一种高效的智能内容过滤模型，它可以对应用层内容协议（如FTP、HTTP 、SMTP、POP3等）所携带的信息进行过滤，较好地避免了规则规模过大而对系统效率的影响 ，有效地处理具有相似内容的垃圾邮件，并具备一定的自学习能力。更多还原

【Abstract】 The case-based reasoning is involved into the content filtering sy stem, thus the paper carries out an advanced intelligent model for content secur ity. It can be used to filter the content within the protocols in application la yer, such as FTP, HTTP, SMTP, POP3 etc. It keeps the filter rules in a certain s cale and has a basic learning ability for filter configuration.更多还原