TAILIEUCHUNG - Báo cáo khoa học: " Paraphrase Generation and Information Retrieval from Stored Text"

First the notion "paraphrase" is defined, and then several different types of paraphrase are analyzed: transformational, attenuated, lexical, derivational, and real-world. Next, several different methods of retrieving information are discussed utilizing the notions of paraphrase defined previously. | Mechanical Translation and Computational Linguistics nos. 1 and 2 March and June 1968 Paraphrase Generation and Information Retrieval from Stored Text by P. W. Culicover IBM Boston Programming Center First the notion paraphrase is defined and then several different types of paraphrase are analyzed transformational attenuated lexical derivational and real-world. Next several different methods of retrieving information are discussed utilizing the notions ofparaphrase defined previously. It is concluded that a combination keyword-keyphrase method would constitute the optimum procedure. 1. Introduction This paper deals with the use of paraphrase relationships to effect the retrieval of stored English text and the information contained in stored English text. Throughout the discussion I will be dealing with the various options available in terms of desirability and practicability. My concern will be primarily with determining the optimum value of each of the following theoretical parameters form of storage form of input method of matching and form of response. More specifically I shall be investigating the possibility of utilizing known paraphrase relationships to expedite the retrieval process and to reduce the quantity of linguistic processing involved in eliciting the proper responses from the data base. Part 2 of this paper deals with paraphrases in vacuo that is it deals with the problem of isolating various well-formed types of paraphrase and the method of generating paraphrases. Part 3 is concerned with the general problem of retrieval from text and discusses and evaluates various logical possibilities in this direction. The uses of paraphrase relationships are evaluated with regard to the degree with which they affect the various possibilities discussed here. 2. The Meaning of Paraphrase Paraphrase is generally considered to be a meaningpreserving relation. If we are dealing with text as a primarily linguistic form then we may say that text a and text b

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