知识图谱构建技术北理工.pptxVIP

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知识图谱构建技术北理工.pptx

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知识图谱构建技术北理工第1页/共58页 Schedule of My Talk百科知识图谱构建技术佛学知识图谱构建技术第2页/共58页 Introduction of Knowledge BasesWhat is knowledge?Facts, information, descriptions, or skillsAcquired through experience or education by perceiving, discovering, or learningKnowledge base: an organized repository of knowledge consisting of concepts, instances, relations (properties), facts, rules etc.Is a principal part of expert systems“the power of an AI program came to be seen as largely in its knowledge base”Edward Feigenbaum, 1994 ACM Turing Award第3页/共58页 Development of Knowledge Base in Recent Decades1985199019952000(#$capitalCity #$France #$Paris)student ?enrollee ?person35 million articles in 288 different languages…15 thousand concepts600 million instances20 billion facts200520102012NELL第4页/共58页 Google Knowledge Graph (KG)It is a new generation of intelligent search technology, which enables you to search for things, not stringsFormal definition: a knowledge graph is a knowledge base with graph structure, where the nodes are instances or concepts, and edges are relations between themIt is a special semantic networkIt belongs to knowledge engineering第5页/共58页中兴通讯上市公司非上市公司子公司中兴康讯Acacia (IPO中)卓翼科技美国高通共进股份宇顺电子美国博通供应商客户竞争对手合作伙伴中国移动英特尔华为中国联通大富科技华星创业盛路通信超声电子Example第6页/共58页 KG and Semantic Search Go deeper and broader第7页/共58页 Technologies of Knowledge Base ConstructionBaiduHudongZh-Wikipedia第8页/共58页 Knowledge Graph (KG) Construction from Online Encyclopedias Well-known open knowledge graphs such as DBpedia, Yago and Zhishi.me are built from online encyclopedias.Technologies of encyclopedic knowledge graph construction:Data extractionEntity matchingType inference第9页/共58页 Zhishi.meZhishi.me (http://zhishi.me) is the first effort to publish large scale Chinese semantic data and link them together as a Chinese Linking Open Data (CLOD).第10页/共58页 Overview of Zhishi.meCurrently, it consists of structured data extracted from three largest Chinese encyclopedia sites:Baidu BaikeHudong BaikeChinese WikipediaIt