信息获取与知识图谱.PDF

信息获取与知识图谱 清华大学计算机系 朱小燕 zxy‐dcs@, @朱小燕THU 2013.10.12 Content  1 • Information Knowledge 2 • Challenges 3 • Achievements Information  Knowledge What do we use the internet for? INFORMATION SERVICE Access the Internet  BuildBuild  knowledge  for getting news,  graph for  URL, etc. generatinggenerating  answersanswers News Microblog Picture Video Encyclopedia Forum Information Services • Baidu Box Computing • Google Knowledge Graph Knowledge • What is knowledge? – Entity + Rule – Triple (predicate, semantic network, rule, framework, ……) Abstracted Information Drawback: Lack of ability to  Coded Information communicate with machine  DIRECTLY! 知识的作用：帮助信息计算、理解、评价 Challenges Scientific Perspective • Our Goal – Information Measurable – Knowledge Computable Measure Mining Acquisition Structurization Information/ Knowledge Application Perspective Information acquisition