tailieunhanh - Báo cáo khoa học: "The Morphological Abstraction of Russian Verbs"

1. The purpose of this paper is the establishment of classes of verbals according to the morphemic alternations of base-form finals; 2. Verbals which are subject to morphemic alternation are treated as single entries instead of as multiple entries; | Mechanical Translation November 1961 The Morphological Abstraction of Russian Verbs by Milos Pacak assisted by Antonina Boldyreff Institute of Languages and Linguistics Georgetown University 1. The purpose of this paper is the establishment of classes of verbals according to the morphemic alternations of base-form finals 2. Verbals which are subject to morphemic alternation are treated as single entries instead of as multiple entries 3. The patterns of compatibility between a given set of compound suffixes and a class of verbal bases are designed to be suitable whether used as inputfor translation from Russian or as output during translation to Russian 4. The proposed procedure is flexible it can be modified or added to without any change in the logical structure 5. This procedure can be applied to other Slavic languages as well. Preface This report is a continuation of an earlier study of Russian morphology as prescribed by the demands of machine translation. There are three main reasons why it has been found necessary to handle the morphology of Russian verbs in a separate paper. 1. The idea of using infix operations for the recognition of participle forms has for programming reasons been temporarily abandoned. 2. The high frequency of verb-base alternations has led to the conclusion that some procedure should be worked out which would make it possible to list as single entries those verb bases which are subject to alternations see Appendix VII and to decrease ambiguity. The establishment of distribution classes of Russian verb-base alternants in terms of sets of paradigmatic suffixes should demonstrate the usefulness of the suggested procedure. The listing of pertinent distribution classes is given in Appendix IV therefore it has not been found necessary to describe them in further detail in the report itself. 3. The morphological procedures described can be used as well for input as for output. General Description A previous paper described how to handle

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