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In a recent paper Yager (1988) introduced a special type of aggregation operators which he called OWA-operators and applied it to multicriteria decisionmaking. In our paper we give a more general definition of such operators and investigate in some detail the structural properties of them. In particular we introduce a well motivated ordering relation on weight systems which is different but compatible with Yager's degree of “orness”. Our results have immediate applications to the theory of generalized quantifiers as also discussed by Yager. Details concerning this topic will appear in a future paper.  相似文献   

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In this one-page statistical summary, data are presented for the USSR as a whole on fertility, mortality, and natural increase. The data are for five-year intervals from 1940 to 1980 and for single years from 1980 and are presented in terms of both totals and rates.  相似文献   

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