Topic
Knowledge representation and reasoning
About: Knowledge representation and reasoning is a research topic. Over the lifetime, 20078 publications have been published within this topic receiving 446310 citations. The topic is also known as: KR & KR².
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118 citations
TL;DR: A method is proposed which manually determines the quality and automatically compares its coverage with ResearchCyc, one of the largest manually created ontologies, and the lexical database WordNet, which shows that the taxonomy compares favorably in quality and coverage with broad-coverage manually created resources.
118 citations
TL;DR: In this article, the authors examine whether the array representation can support children's understanding and reasoning in multiplication, and find that it can help children to understand and reason in multiplication problems, and that it may even improve their performance.
Abstract: We examine whether the array representation can support children’s understanding and reasoning in multiplication. To begin, we define what we mean by understanding and reasoning. We adopt a ‘representational-reasoning’ model of understanding, where understanding is seen as connections being made between mental representations of concepts, with reasoning linking together the different parts of the understanding. We examine in detail the implications of this model, drawing upon the wider literature on assessing understanding, multiple representations, self explanations and key developmental understandings. Having also established theoretically why the array representation might support children’s understanding and reasoning, we describe the results of a study which looked at children using the array for multiplication calculations. Children worked in pairs on laptop computers, using Flash Macromedia programs with the array representation to carry out multiplication calculations. In using this approach, we were able to record all the actions carried out by children on the computer, using a recording program called Camtasia. The analysis of the obtained audiovisual data identified ways in which the array representation helped children, and also problems that children had with using the array. Based on these results, implications for using the array in the classroom are considered.
117 citations
TL;DR: A Fuzzy Petri Net notion that combines the graphical power of Petri Nets and the capabilities of FuzzY Sets to model rule-based expert knowledge in a decision support system for railway operation control systems is described.
117 citations
01 Sep 1994
TL;DR: The consequences of introducing a constructor for building a concept from a set of enumerated individuals in the concept description language are investigated and some complexity results are provided on it.
Abstract: One of the main characteristics of knowledge representation systems based on the description of concepts is the clear distinction between terminological and assertional knowledge. Although this characteristic leads to several computational and representational advantages, it usually limits the expressive power of the system. For this reason, some attempts have been done, allowing for a limited form of amalgamation between the two components and a more complex interaction between them. In particular, one of these attempts is based on letting the individuals to be referenced in the concept expressions. This is generally performed by admitting a constructor for building a concept from a set of enumerated individuals. In this paper we investigate on the consequences of introducing this type of constructor in the concept description language and we provide some complexity results on it.
117 citations