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In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t This paper introduces a new hybrid cluster validity method based on(More)
Keywords: Fuzzy C-means Genetic algorithm Rough set GRP-index method PBMF-index function Pseudo-supervised classification method Discretization a b s t r a c t This study proposes a method, designated as the GRP-index method, for the classification of continuous value datasets in which the instances do not provide any class information and may be imprecise(More)
In this study, the Grey Relational Analysis (GRA) model is combined with Fuzzy C-Means (FCM) clustering scheme and Rough Set (RS) theory to create an automatic portfolio selection mechanism. In the proposed approach, 53 financial indices are collected automatically for each stock item every quarter and a GRA model is used to consolidate these indices into(More)
In this study, the new grey relational grade (GRG) method is combined with moving average autoregressive exogenous (ARX) prediction model, GM(1,N) theory and rough set (RS) theory to create an automatic stock market forecasting and portfolio selection mechanism. In the proposed approach, financial data are collected automatically every quarter and are input(More)
This paper proposed a new hybrid method, designated as PSOVPRS-index method, for partitioning and classifying continuous valued datasets based on particle swarm optimization (PSO) algorithm, Variable Precision Rough Set (VPRS) theory and a modified form of the Huang-index function. In contrast to the Huang-based index method which simply assigns a constant(More)