The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Traditional keyword-based search methods are used widely to find the user's requirements, but the results are not very satisfactory because of semantic ambiguity of concepts. However, domain ontologies contain great number of domain concepts and their relations. Hence, to achieve more accurate query results, in this paper, we propose a novel approach to expand the domain concepts using the results...
Along with the occurrence and continuous development of semantic sensor web, more and more sensor data is released on network in the format of RDF. In order to solve the problem that heterogeneous sensor data can hardly be integrated, we design and develop a service system for sensor data on the basis of mapping sensor data to RDF. In this paper, we propose an approach to provide visual data service...
With the profusion of the Linked Open Data, background knowledge base is playing an increasingly important role. For example, it can provide a basis for ontology alignment, but the background knowledge base is insufficient in metallic materials domain. However, a large amount of metallic materials knowledge exists in Yago, which can provide knowledge structure for background knowledge base. In this...
Semantic Web and ontology play an important role in various research fields today, but are rarely used in the materials science domain. In this paper we propose an approach to find a mapping method from metal materials database to an ontology. The proposed method refers to the latest W3C standard DM and R2RML. The goal of the mapping system is to transform Relational Database (RDB) to the Resource...
In order to make best use of massive oilfield XML data which is heterogeneous and distributed, we propose a semantic integration method of building XML Knowledge Base named XML-WeKB. In this method, XML schema is first mapped to a local-Ontology by series of extraction rules, and then XML data is converted into local-Ontology instances to fill XML-WeKB by executing a recursive transformation algorithm...
At present, massive Web Services are available on the Internet; discovery of relevant and required ones among these Web Services becomes a significant challenge. Because of deficiency of semantics, traditional discovery approaches are inefficient and have lower precision rate. In such a case, this paper presents a framework of Web Services description and discovery using OWL-S and domain ontology...
With the development of the Semantic Web, ontology is playing an increasingly important role in many research areas such as semantic interoperability and knowledge base. However, building ontology manually is time-consuming and error-prone. In such a case, this paper proposes a method of building domain-specific OWL ontology from relational database automatically. This method establishes three mapping...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.