信息交流是信息社会中普遍的现象，信息交流技术目前已有许多。现有的数据库信息网上发布和集成方法还存在许多缺点，本文针对这些缺点提出了新的发布模型，很好地解决了异构数据库信息以及其他类型信息在网络上发布、访问和加工运用的问题。本文还介绍了该模型的一种实现框架，并展望进一步的工作。

We propose a new tree similarit measure based on the Connectivity-lntegrality Principle (CI). C! is a concept from graph theory that makes the tree similarity to be measured by taking account of both the partial and the integral structures of trees. We have proved in theory that the new measure has better flexibility than the other lavo typical similarity measures when given a variety of common substructures benveen two trees. We apply this new measure to a specific-domain QA system to undertake the task of sentencelevel disambiguation. Experimental results show that, the new model can effectively enhance the rejection rate that aims at irrelevant documents

本文讨论一种分布信息访问环境下提高数据利用率和减少通信流量的分布缓存体系。通过引入缓存节点，该缓存体系能缓存集成多数据源的信息，并能使多个用户相互重用数据缓存，提高缓存的命中率。该缓存体系采用了多种方法，很好地解决了单数据源和集成多数据源的数据缓存一致性问题。