tailieunhanh - Báo cáo khoa học: "COMPUTER METHODS FOR MORPHOLOGICAL ANALYSIS"

This paper describes our current research on the properties of derivational affixation in English. Our research arises from a more general research project, the Lexical Systems project at the IBM Thomas J. Watson Research laboratories, the goal for which is to build a variety of computerized dictionary systems for use both by people and by computer programs. An important sub-goal is to build reliable and robust word recognition mechanisms for these dictionaries. One of the more important issues in word recognition for all morphologically complex languages involves mechanisms for dealing with affixes. Two complementary motivations underlie our research on. | COMPUTER METHODS FOR MORPHOLOGICAL ANALYSIS Roy J. Byrd Judith L. Klavans . Thomas J. Watson Research Center Yorktown Heights New York 10598 Mark Aronoff Frank Anshen SUNY Stony Brook Stony Brook New York 11794 1. Introduction This paper describes our current research on the properties of derivational affixation in English. Our research arises from a more general research project the Lexical Systems project at the IBM Thomas J. Watson Research laboratories the goal for which is to build a variety of computerized dictionary systems for use both by people and by computer programs. An important sub-goal is to build reliable and robust word recognition mechanisms for these dictionaries. One of the more important issues in word recognition for all morphologically complex languages involves mechanisms for dealing with affixes. Two complementary motivations underlie our research on derivational morphology. On the one hand our goal is to discover linguistically significant generalizations and principles governing the attachment of affixes to English words to form other words. If we can find such generalizations then we can use them to build our improved word recognizer. We will be better able to correctly recognize and analyse well-formed words and on the other hand to reject ill-formed words. On the other hand we want to use our existing word-recognition and analysis programs as tools for gathering further information about English affixation. This circular process allows us to test and refine our emerging word recognition logic while at the same time providing a large amount of data for linguistic analysis. It is important to note that while doing derivational morphology is not the only way to deal with complex words in a computerized dictionary it offers certain advantages. It allows systems to deal with coinages a possibility which is not open to most systems. Systems which do no morphology and even those which handle primarily inflectional affixation such as .

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