Experimental information retrieval

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Operational information retrieval
Information retrieval system
Information retrieval definition
Data retrieval systems
Automatic document classification
Retrieval effectiveness
Cluster based retrieval
Document clustering
Automatic classification

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3 that in IR we are searching for relevant documents as opposed to exactly matching items ...Many automatic information retrieval systems are experimental ...Many of the techniques I shall discuss will not have proved themselves incontrovertibly superior to all other techniques,but they have promise and their promise will only be realised when they are understood ...My aim throughout has been to give a complete coverage of the more important ideas current in various special areas of information retrieval ...
58 structure representing it inside the computer ...Just as in many other computational problems,it is possible to trade core storage and computation time ...One important decision to be made in any retrieval system concerns the organisation of storage ...Another good example of the difference in approach between experimental and operational implementations of a classification is in the permanence of the cluster representatives ...Probably one of the most important features of a classification implementation is that it should be able to deal with a changing and growing document collection ...Although many classification algorithms claim this feature,the claim is almost invariably not met ...These comments tend to apply to the n log n classification methods ...