To effectively manage the heterogeneous and discrete knowledge of bridge maintenance domain, this study adopts graph technology to build a base maintenance, called (BMKG). The BMKG uses an ontology as organization representation framework database storage tool. facilitate construction BMKG, hybrid method combining top-down approach bottom-up is proposed. Firstly, domain (BMDO) coded with Protég...

By E. Hassan February 2002 Abstract This paper examines the knowledge structure of the field of space communications using bibliometric mapping techniques based on textual analysis. A new approach with the aiming of visualizing simultaneously the configuration of its scientific and technological knowledge bases is presented. The bibliometric map revealed weak cognitive interactions between scie...

miRò is a web-based knowledge base that provides users with miRNA-phenotype associations in humans. It integrates data from various online sources, such as databases of miRNAs, ontologies, diseases and targets, into a unified database equipped with an intuitive and flexible query interface and data mining facilities. The main goal of miRò is the establishment of a knowledge base which allows no...

In this paper we present a framework of retrospective reasoning to deal with the belief revision problem in knowledge systems. First, a rst-order knowledge base is represented by a set of formulas in a rst order epistemic belief language that contains objective formulas as well as belief formulas. Secondly, we deene the revision operation by applying a form of prioritized circumscription to thi...

Information processing environments have been rapidly changing in many elds: not only changes of network environments and hardware systems, but also enhanced requirements of application systems, database systems, and knowledge-base systems. It is necessary to reconsider how to construct information systems in new environments. For example, in databases, there are many di culties to cope with ad...

The value of a corporate information system such as an experience base tends to degrade with time. To keep the value of such a system, maintenance is an essential. Maintenance should not simply happen ad-hoc but systematically and based on specific maintenance knowledge. As a jump-start for maintenance, maintenance knowledge should be available right from the start of continuous operation. This...

The four-valued paraconsistent logic SROIQ4, originally presented by Ma and Hitzler, is extended to incorporate additional elements of SROIQ. It is shown that the modified logic is classically sound and that its embedding into classical SROIQ is consequence preserving. Furthermore, inserting special axioms into a SROIQ4 knowledge base allows additional nontrivial conclusions to be drawn, withou...

Most knowledge bases (KBs) that emerged in recent years are static. They contain facts about the world yet are seldom updated as the world changes: attributes or possessions of entities in the KB change over time; what (actions) the entities can do or what can be done to them change over time. Current methods for extracting facts in the KBs do not yet detect such state changes although these ch...

Most people know that the Pacific is the largest ocean on Earth and that Edison invented the light bulb. Our question is whether this knowledge is stable, or if people will incorporate errors into their knowledge bases, even if they have the correct knowledge stored in memory. To test this, we asked participants general-knowledge questions 2 weeks before they read stories that contained errors ...