To alleviate the amount of work involved in constructing a domain ontology, starting with the base of an existing terminological-rich thesaurus is better than starting from scratch. With a case study of reengineering ...To alleviate the amount of work involved in constructing a domain ontology, starting with the base of an existing terminological-rich thesaurus is better than starting from scratch. With a case study of reengineering the Defense Science and Technology Thesaurus into a prototype military aircraft ontology, a four-phase thesaurus-based methodology is introduced and investigated, which consists of identifying the application purpose, overall design, designing in detail and evaluation. Designing in detail is the core step, converting the terms and semantic relationships of the thesaurus into an ontology and supplementing richer semantic relationships. The resulting prototype ontology includes 87 concepts and 34 relationships, and can be extended and scaled up to a full-fledged domain ontology in the future. Eight universal genres of relationships of this ontology are preliminarily summarized and analyzed, including equivalent relationships, approximate relationships, generic/abstract relationships, part/whole relationships, cause/effect relationships, entity/location relationships etc., and the normalization of semantic relationships is critical to the merging and reusing of follow-up multiple ontologies.展开更多
Based on the statistics of 130 thesauri having been published in China so far,this article analyzes the development of thesauri in China from the origin,publication year,academic disciplines and quantity of entries co...Based on the statistics of 130 thesauri having been published in China so far,this article analyzes the development of thesauri in China from the origin,publication year,academic disciplines and quantity of entries collected,and re-defines the development stages.In addition,by collecting the 1,000 relevant research papers,the article also analyzes the theoretical studies from the aspects of the quantity of papers and research subjects in order to give a clear picture of the development and features of the researches on thesaurus in China.展开更多
There are deep-rooted traditions of researches on the youth problems in Russia, By their trends and purposes they partly concur with the traditions of the humanities in Europe and America. In Russia in different times...There are deep-rooted traditions of researches on the youth problems in Russia, By their trends and purposes they partly concur with the traditions of the humanities in Europe and America. In Russia in different timesmit was the same way in the West-diverse youth concepts had been conveying and continue to express the society＇s expectations for new generations. This is in a sense a theoretical mirror of the natural process of generation change. Under modern conditions these concepts can be reduced to three directions： youth-＂no man＇s land＂, youth-social danger, youth-hope of society. At the same time youth theories have the mark of the socio-cultural contexts and contexts of the development of the humanities in Russia. In this article these similarities and distinctions will be examined.展开更多
Thesaurus retrieval is fundamental in Chinese information processing.After a brief review of the current technique,this pa-per made a deep analysis to the design of Chinese thesaurus Hash function based on chain addre...Thesaurus retrieval is fundamental in Chinese information processing.After a brief review of the current technique,this pa-per made a deep analysis to the design of Chinese thesaurus Hash function based on chain address conflict dissolving method,and several criteria,as well as the theoretic expectation of these criteria,were proposed to evaluate different Hash functions.According these values,some experimental Hash functions were proposed which had high efficiency in our test.展开更多
文摘To alleviate the amount of work involved in constructing a domain ontology, starting with the base of an existing terminological-rich thesaurus is better than starting from scratch. With a case study of reengineering the Defense Science and Technology Thesaurus into a prototype military aircraft ontology, a four-phase thesaurus-based methodology is introduced and investigated, which consists of identifying the application purpose, overall design, designing in detail and evaluation. Designing in detail is the core step, converting the terms and semantic relationships of the thesaurus into an ontology and supplementing richer semantic relationships. The resulting prototype ontology includes 87 concepts and 34 relationships, and can be extended and scaled up to a full-fledged domain ontology in the future. Eight universal genres of relationships of this ontology are preliminarily summarized and analyzed, including equivalent relationships, approximate relationships, generic/abstract relationships, part/whole relationships, cause/effect relationships, entity/location relationships etc., and the normalization of semantic relationships is critical to the merging and reusing of follow-up multiple ontologies.
基金supported by the National Nature Science Foundation of China(Grant No.70573103)
文摘Based on the statistics of 130 thesauri having been published in China so far,this article analyzes the development of thesauri in China from the origin,publication year,academic disciplines and quantity of entries collected,and re-defines the development stages.In addition,by collecting the 1,000 relevant research papers,the article also analyzes the theoretical studies from the aspects of the quantity of papers and research subjects in order to give a clear picture of the development and features of the researches on thesaurus in China.
文摘There are deep-rooted traditions of researches on the youth problems in Russia, By their trends and purposes they partly concur with the traditions of the humanities in Europe and America. In Russia in different timesmit was the same way in the West-diverse youth concepts had been conveying and continue to express the society＇s expectations for new generations. This is in a sense a theoretical mirror of the natural process of generation change. Under modern conditions these concepts can be reduced to three directions： youth-＂no man＇s land＂, youth-social danger, youth-hope of society. At the same time youth theories have the mark of the socio-cultural contexts and contexts of the development of the humanities in Russia. In this article these similarities and distinctions will be examined.
文摘Thesaurus retrieval is fundamental in Chinese information processing.After a brief review of the current technique,this pa-per made a deep analysis to the design of Chinese thesaurus Hash function based on chain address conflict dissolving method,and several criteria,as well as the theoretic expectation of these criteria,were proposed to evaluate different Hash functions.According these values,some experimental Hash functions were proposed which had high efficiency in our test.
