Development of Multi-Agent-based Intelligent Information Retrieval System

在本研究中，我们首先提出了基于代理社区的对等信息检索（ACP 2 P）方法，并进行了各种实验。ACP 2 P方法使用代理社区来管理和查找用户感兴趣的信息。代理作为其用户的代表，通过与其他代理通信来搜索用户想要的信息。代理之间的通信在对等计算架构中进行。检索与用户查询相关的信息与内容文件一起执行，内容文件包括原始文档和检索到的文档，以及两个历史：查询/检索到的文档历史和查询/发送者代理历史。利用历史具有协同过滤效果，逐渐创建虚拟代理社区，具有相同兴趣的代理呆在一起。我们的假设是，一个虚拟的代理社区减少了必要的通信负载进行搜索。当一个代理接收到更多的查询时， ...更多信息 获得与新知识的更多联系。从这种行为中，代理的“给予和索取”（或正反馈）效应似乎出现了。其次，我们提出了一个个人语义Web信息检索系统的概念架构。它融合了语义Web、Web服务、P2P和多Agent技术，不仅可以实现Web资源的精确定位，还可以实现通过Web内容和Web服务传递的Web资源的自动或半自动集成。在该体系结构中，一致地考虑了信息检索整个生命周期中的语义问题，实现了Web内容和Web服务的无缝集成。该体系结构由三个主要组成部分：消费者，提供者和中介。所有的提供者和消费者都被构造为语义上的“MyPortal”，它为与用户相关的所有信息提供了一个网关。每个提供者在我们称之为WSCD（Web站点能力描述）的文件中描述其能力，当需要进行Web搜索时，每个使用者将根据用户需求提交相关的查询。中介者是由代理分配给消费者和供应商使用基于代理社区的P2P信息检索（ACP 2 P）的方法来实现语义MyPortals之间的信息共享。一些初步的实验结果表明ACP 2 P方法的有效性和两个查询/响应历史的有用性，寻找新的信息源和减少通信负载。最后，我们提出了主动浏览系统，支持用户的Web浏览活动。该系统观察用户的Web浏览行为，学习他/她的方式或偏好，并试图通过推荐他们来节省他/她到达他/她想要的页面的劳动。该系统不仅推荐用户过去浏览过的页面，而且还通过协同过滤技术从其他用户那里收集他/她感兴趣的新页面。该系统基于多Agent KODAMA框架实现。一些初步的实验结果说明了我们的方法的有效性。少

In this research, we first proposed the agent-community-based peer-to-peer information retrieval (ACP2P) method and carried out various experiments. The ACP2P method uses agent communities to manage and look up information of interest to users. An agent works as a delegate of its user and searches for information that the user wants by communicating with other agents. The communication between agents is carried out in a peer-to-peer computing architecture. Retrieving information relevant to a user query is performed with content files which consist of original and retrieved documents, and two histories : a query/retrieved document history and a query/sender agent history. Making use of the histories have a collaborative filtering effect, which gradually creates virtual agent communities, where agents with the same interests stay together. Our hypothesis is that a virtual agent community reduces communication loads necessary to perform a search. As an agent receives more queries, then m … More ore links to new knowledge are acquired. From this behavior, a "give and take"(or positive feedback) effect for agents seems to emerge.Secondly, we proposed a conceptual architecture for a personal semantic Web information retrieval system. It incorporates semantic Web, Web service, P2P and multi-agent technologies to enable not only precise location of Web resources but also the automatic or semi-automatic integration of Web resources delivered through Web contents and Web services. In this architecture, the semantic issues concerning the whole lifecycle of information retrieval were considered consistently and the integration of Web contents and Web services is enabled seamlessly. The architecture consists of three main components : consumer, provider and mediator. All providers and consumers are constructed as semantic "MyPortal" which provides a gateway to all the information relevant to a user. Each provider describes its capabilities in what we call a WSCD (Web site capability description), and each consumer will submit relevant queries based on user requirements when a Web search is necessary. The mediator is composed of agents assigned to the consumer and providers using an Agent-Community-based P2P information retrieval (ACP2P) method to fulfill the information sharing among semantic MyPortals. Some of preliminary experimental results showed the efficiency of the ACP2P method and the usefulness of two query/response histories for looking up new information sources and for reducing communication loads.Lastly, we proposed the Active Browsing system which supports user's Web browsing activity. The system observes user's Web browsing behaviors, learns his/her ways or preferences and tries to save his/her labor for reaching the pages he/she wants by recommending them. The system recommends not only the pages the user browsed in the past, but also the pages which are new and interesting to him/her by collecting from other users with a collaborative-filtering technique. The system is implemented based on Multi-Agent KODAMA framework. Some of preliminary experimental results illustrated the validity of our approach. Less