Classifier tuning based on data similarities
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United States of America Patent
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Aug 8, 2006
Grant Date -
N/A
app pub date -
Dec 22, 2003
filing date -
Jan 24, 2003
priority date (Note) -
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Abstract
A probabilistic classifier is used to classify data items in a data stream. The probabilistic classifier is trained, and an initial classification threshold is set, using unique training and evaluation data sets (i.e., data sets that do not contain duplicate data items). Unique data sets are used for training and in setting the initial classification threshold so as to prevent the classifier from being improperly biased as a result of similarity rates in the training and evaluation data sets that do not reflect similarity rates encountered during operation. During operation, information regarding the actual similarity rates of data items in the data stream is obtained and used to adjust the classification threshold such that misclassification costs are minimized given the actual similarity rates.
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