Knowledge Represenation Cognitive Science at Northwestern知识表示在西北认知科学.pptVIP

下载本文档

4
0
约2.55万字
约 44页
2018-06-19 发布于福建
举报
版权申诉

Knowledge Represenation Cognitive Science at Northwestern知识表示在西北认知科学.ppt

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

Knowledge Represenation Cognitive Science at Northwestern知识表示在西北认知科学

Knowledge Representation Praveen Paritosh CogSci 207: Fall 2003: Week 1 Thu, Sep 30, 2004 Elements of a Representation Represented world: about what? Representing world: using what? Representing rules: how to map? Process that uses the representation: conventions and systems that use the representations resulting from above. Analog versus Symbolic Marr’s levels of description Computational: What is the goal of the computation, why is it appropriate, and what is the logic of the strategy by which it can be carried out? Algorithmic: How can this computational theory be implemented? In particular, what is the representation for the input and output, and what is the algorithm for the transformation? Implementation: How can the representation and algorithm be realized physically? Marr’s levels of description – 2 Computational: a lot of cognitive psychology Algorithmic: a lot of cognitive science Implementation: neuroscience A closer look Overview How knowledge representation works Basics of logic (connectives, model theory, meaning) Basics of knowledge representation Why use logic instead of natural language? Quantifiers Organizing large knowledge bases Ontology Microtheories Resource: OpenCyc tutorial materials How Knowledge Representation Works Intelligence requires knowledge Computational models of intelligence require models of knowledge Use formalisms to write down knowledge Expressive enough to capture human knowledge Precise enough to be understood by machines Separate knowledge from computational mechanisms that process it Important part of cognitive model is what the organism knows How knowledge representations are used in cognitive models Contents of KB is part of cognitive model Some models hypothesize multiple knowledge bases. What’s in the knowledge base? Facts about the specifics of the world Northwestern is a private university The first thing I did at the party was talk to John. Rules (aka axioms) that describe ways to infer new facts from existi