Adaptive Information Filtering: Evolutionary Computation and n-gram Representation

Daniel R. Tauritz, Missouri University of Science and Technology
Ida G. Sprinkhuizen-Kuyper

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Adaptive Information Filtering (AIF) is concerned with filtering information streams in changing environments. The changes may occur both on the transmission side (the nature of the streams can change) and on the reception side (the interests of a user can change). The research described in this paper details the progress made in a prototype AIF system based on weighted n-gram analysis and evolutionary computation. A major advance is the design and implementation of an n-gram class library allowing experimentation with different values of n instead of solely with 3-grams as in the past. The new prototype system was tested on the Reuters-21578 text categorization test collection.