Knowledge base update has been given much attention in the AI literature. The best-known solution to this problem is Winslett's PMA formalism. In this paper we propose di erent intuitions standing behind knowledge base update. Roughly speaking, we consider an update formula not as an e ect of an action to be performed, but rather as an observation about dynamically changing world made by an age...

The attribute set A for the MutualFriends task contains name, school, major, company, hobby, timeof-day preference, and location preference. Each attribute a has a set of possible values (entities) Ea. For name, school, major, company, and hobby, we collected a large set of values from various online sources.14 We used three possible values (morning, afternoon, and evening) for the time-of-day ...

Recently, the development of knowledge bases is considered to be a process of extending an ontology with specific knowledge of a particular application. Reuse of pre-existing knowledge sources gives rise to knowledge bases endowed with a common and standard terminology. But, reuse often requires an enormous effort, so few knowledge-based applications have arisen following this approach. In this...

In this paper, we study the problem of exchanging knowledge between two knowledge bases (KBs) connected through mappings, with a special interest in exchanging implicit knowledge, not only data like in the traditional database exchange setting. As representation formalism we use Description Logics (DL) that exhibit a reasonable tradeoff between expressive power and complexity of reasoning. Thus...

a water jet machining is an industrial tool capable of cutting a wide variety of materials using avery high-pressure jet of water, or a mixture of water and an abrasive substance. this paperaddresses the concept of the intelligent knowledge base system (ikbs) for optimization of productdesign and manufacturing process for water jet machining in computer based concurrentengineering environment. ...

We will present in this paper how to ensure a knowledge evaluation and evolution in a knowledge management system by using a Semantic Wiki approach. We describe a Semantic Wiki called WikiDesign which is a component of a Knowledge Management system. Currently WikiDesign is use in engineering department of companies to emphasize technical knowledge. In this paper, we will explain how WikiDesign ...

Understanding the web user browsing behaviour in order to adapt a web site to the needs of a particular user represents a key issue for many commercial companies that do their business over the Internet. This paper presents the implementation of a Knowledge Base (KB) for building web-based computerized recommender systems. The Knowledge Base consists of a Pattern Repository that contains patter...