In this paper,the author proposed a linked data-oriented framework for resource descnption and organization in semantic digital libraries,which includes four layers—metadata layer,ontology layer,linked data layer and...In this paper,the author proposed a linked data-oriented framework for resource descnption and organization in semantic digital libraries,which includes four layers—metadata layer,ontology layer,linked data layer and application layer.The core of the framework is the construction and linking of RDF-based semantic metadata.Using the data from the domain of 'Library,Information & Archival Science' as an example,the author focused on the ontology layer and linked data layer to implement the framework,which involves the design of related ontologies,automatic transformation of traditional metadata into semantic metadata,construction of RDF semantic links among different datasets,and publishing of linked data etc.展开更多
Social Network Extraction(SNE)is an emerging research field which focuses on automatic extraction of hidden social networks from a wide variety of information sources.The articles of online encyclopedia contain massiv...Social Network Extraction(SNE)is an emerging research field which focuses on automatic extraction of hidden social networks from a wide variety of information sources.The articles of online encyclopedia contain massive information about persons as well as their interpersonal relationships,from which a people social network can be extracted and used for the research of digital humanities and social computing.展开更多
In information retrieval, thesauri have increasingly become vital as an aid to effective retrieval. In the networked environment, terminology services become an ideal way to employ thesauri in application systems. How...In information retrieval, thesauri have increasingly become vital as an aid to effective retrieval. In the networked environment, terminology services become an ideal way to employ thesauri in application systems. However, most of existing projects or systems focused mainly on the construction of terminology services and seldom gave attention to their usage. The overall purpose of this study is to investigate the construction of terminology services and their usage. Firstly, taking Chinese Thesaurus as a source vocabulary, a system was built with the use of REST architecture and Semantic Web technologies. After the construction of terminology services, this study used the above mentioned six terminology services to investigate the usage of terminology services in information retrieval systems based on the embedded client. Taking the get Synonym service as an example, the usefulness of terminology services was tested with an experiment of 30 user queries to the library OPAC system and Baidu Search Engine. OPAC’s experiment results showed that the average recall increases 26.7% while the average precision decreases 4.6%. Baidu’s experiment results showed that the P@5 precision increases 16%. Four usage modes were designed, including multiple choice for query expansion, single choice for query replacement, hybrid of query expansion and replacement, and automatic query expansion. To evaluate their usability, a user testing was carried out in the library OPAC system and Baidu Search Engine with 24 human subjects based on four usability criteria(effectiveness, efficiency, user satisfaction and learnability). The evaluation results showed that multiple choice for query expansion was the best usage mode which is more effective, easier to use, easier to learn, and has higher user satisfaction.展开更多
基金the research achievements of National Social Science Funding Project"Research on the Construction and Application of SOA-based Terminology Registry and Terminology Services"(approval number:11BT0023)the Ministry of Education Social Science Foundation Supported Project"Research on Semantic Digital Libraries of Linked Data"(approval number:10YJA870014)
文摘In this paper,the author proposed a linked data-oriented framework for resource descnption and organization in semantic digital libraries,which includes four layers—metadata layer,ontology layer,linked data layer and application layer.The core of the framework is the construction and linking of RDF-based semantic metadata.Using the data from the domain of 'Library,Information & Archival Science' as an example,the author focused on the ontology layer and linked data layer to implement the framework,which involves the design of related ontologies,automatic transformation of traditional metadata into semantic metadata,construction of RDF semantic links among different datasets,and publishing of linked data etc.
文摘Social Network Extraction(SNE)is an emerging research field which focuses on automatic extraction of hidden social networks from a wide variety of information sources.The articles of online encyclopedia contain massive information about persons as well as their interpersonal relationships,from which a people social network can be extracted and used for the research of digital humanities and social computing.
基金an outcome of the project “Research on the Construction and Application of SOA-based Terminology Registry and Terminology Services”(No.11BT0023)supported by National Social Science Foundation of China
文摘In information retrieval, thesauri have increasingly become vital as an aid to effective retrieval. In the networked environment, terminology services become an ideal way to employ thesauri in application systems. However, most of existing projects or systems focused mainly on the construction of terminology services and seldom gave attention to their usage. The overall purpose of this study is to investigate the construction of terminology services and their usage. Firstly, taking Chinese Thesaurus as a source vocabulary, a system was built with the use of REST architecture and Semantic Web technologies. After the construction of terminology services, this study used the above mentioned six terminology services to investigate the usage of terminology services in information retrieval systems based on the embedded client. Taking the get Synonym service as an example, the usefulness of terminology services was tested with an experiment of 30 user queries to the library OPAC system and Baidu Search Engine. OPAC’s experiment results showed that the average recall increases 26.7% while the average precision decreases 4.6%. Baidu’s experiment results showed that the P@5 precision increases 16%. Four usage modes were designed, including multiple choice for query expansion, single choice for query replacement, hybrid of query expansion and replacement, and automatic query expansion. To evaluate their usability, a user testing was carried out in the library OPAC system and Baidu Search Engine with 24 human subjects based on four usability criteria(effectiveness, efficiency, user satisfaction and learnability). The evaluation results showed that multiple choice for query expansion was the best usage mode which is more effective, easier to use, easier to learn, and has higher user satisfaction.