We present a method for measuring the semantic similarity of texts using a corpus-based measure of semantic word similarity and a normalized and modified version of the Longest Common Subsequence (LCS) string matching algorithm. Existing methods for computing text similarity have focused mainly on either large documents or individual words. We focus on computing the similarity between two sentences or two short paragraphs. The proposed method can be exploited in a variety of applications involving textual knowledge representation and knowledge discovery. Evaluation results on two different data sets show that our method outperforms several competing methods.

https://site.uottawa.ca/~diana/publications/tkdd.pdf

Semantic text similarity using corpus-based word similarity and string similarity

In this book, Nirenburg and Raskin present an important body of work in computational linguistics that they and their colleagues have been developing over the past 20 years. For a unifying perspective, they organize their assumptions, theories, and techniques around the theme of ontological semantics. Along the way, they critique many alternative views of semantics, which they distinguish from their own. Their analyses contribute to a much-needed debate about the history and future of computational linguistics, but to preserve some balance, teachers and students should keep a few of the alternatives on their reference shelf. The book is divided into two parts: a philosophical part I and a practical part II. The first part consists of an introductory chapter 1 and four chapters that survey important but controversial issues about linguistics, both theoretical and computational. In those chapters, the authors make a good case for their version of ontological semantics, but the alternatives are not treated in detail. In part II, the authors present their text-meaning representation (TMR) and demonstrate how it is used in language analysis. Any discussion of technical material must use some notation, and TMR is sufficiently flexible to illustrate a wide range of semantic-based methods that could be adapted to many other formalisms. For most readers, part II would be the more important. Chapter 1 is a good 25-page overview of computational linguistics with an emphasis on semantics. Students and novices, however, need examples, and none are given until chapter 6. The authors suggest that ‘‘a well-prepared and/or uninterested reader’’ skip the remainder of part I and go straight to chapter 6, which begins with an excellent five-page example. The authors follow that advice when they teach courses from this text. In Chapter 2, the authors present their ‘‘Prolegomena to the Philosophy of Linguistics.’’ Their ideas are well taken, and some are as old as Socrates: Examine the assumptions, challenge conventional wisdom, and test conclusions against experience. The basis of their approach is what they call the four components of a scientific theory:

Ontological semantics

This article develops a situative approach to explaining the transfer of learning, illustrating it using a challenging-to-explain case from a Fostering Communities of Learners classroom. The case involved a group of 5th graders who learned and then transferred a more sophisticated way of explaining species survival and endangerment despite participating in a unit in which many activities designed to foster transfer were short circuited. The explanation included 2 kinds of analyses: (a) how students participated in the learning of relevant content, and (b) how learning contexts were framed interactionally. The content analysis took a situative perspective on commonly investigated transfer mechanisms such as quality of initial learning, engagement with multiple examples, comparison between examples, and formation of generalizations. There was strong evidence for a few of these mechanisms and weak or inconclusive evidence for others. The context analysis explored 2 aspects of the relatively new hypothesis th...

Framing Interactions to Foster Generative Learning: A Situative Explanation of Transfer in a Community of Learners Classroom

Psychological states such as thoughts and feelings are real. Brain states are real. The problem is that the two are not real in the same way, creating the mind-brain correspondence problem. In this article, I present a possible solution to this problem that involves two suggestions. First, complex psychological states such as emotion and cognition can be thought of as constructed events that can be causally reduced to a set of more basic, psychologically primitive ingredients that are more clearly respected by the brain. Second, complex psychological categories like emotion and cognition are the phenomena that require explanation in psychology, and, therefore, they cannot be abandoned by science. Describing the content and structure of these categories is a necessary and valuable scientific activity.

https://www.bc.edu/content/dam/files/schools/cas_sites/psych/pdf/articles/future_of_psych.pdf

榕培汪

Papers

语义学引论 = Linguistic Semantics

榕培 汪

Papers

语义学引论 = Linguistic Semantics

榕培汪