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Method and apparatus for profile score threshold setting and updating

  • US 6,535,876 B2
  • Filed: 06/05/2002
  • Issued: 03/18/2003
  • Est. Priority Date: 11/02/1999
  • Status: Expired due to Fees
First Claim
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1. A system for filtering documents, comprising:

  • means for selecting a document profile and an expected document delivery ratio;

    means for scoring a reference set of documents according to said document profile;

    means for determining an assigned score threshold corresponding to said expected document delivery ratio;

    means for determining a utility function by calculating a utility for each of said documents in said reference set;

    means for determining a first utility threshold based on said utility function, wherein said first utility threshold (θ

    opt) is the highest utility over said reference set;

    means for determining a second utility threshold based on said utility function, wherein said second utility threshold (θ

    zero) is the highest utility below said first utility threshold that has a non-positive utility over said reference set;

    means for interpolating between said first utility threshold and said second utility threshold to determine an updated score threshold; and

    means for filtering incoming documents based on said updated score threshold.

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