Patents by Inventor Desislava Petkova

Desislava Petkova has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Context-sensitive query expansion
    Patent number: 7831588
    Abstract: A method for processing a search query having a plurality of search terms for searching for documents includes segmenting the query to identify two or more units, expanding the query by selecting one or more substitutable units for at least one unit in the query, and calculating a substitution probability for each substitutable unit. For each substitutable unit, a co-occurrence probability is calculated with each of the remaining units in the search query. An occurrence probability is then calculated for each substitutable unit, and a score is calculated based on the combination of the substitution probability, the co-occurrence probability, and occurrence probability. The documents are ranked in an order determined by the score.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: November 9, 2010
    Assignee: Yahoo! Inc.
    Inventors: Rosie Jones, Desislava Petkova
  • CONTEXT-SENSITIVE QUERY EXPANSION
    Publication number: 20090198672
    Abstract: A method for processing a search query having a plurality of search terms for searching for documents includes segmenting the query to identify two or more units, expanding the query by selecting one or more substitutable units for at least one unit in the query, and calculating a substitution probability for each substitutable unit. For each substitutable unit, a co-occurrence probability is calculated with each of the remaining units in the search query. An occurrence probability is then calculated for each substitutable unit, and a score is calculated based on the combination of the substitution probability, the co-occurrence probability, and occurrence probability. The documents are ranked in an order determined by the score.
    Type: Application
    Filed: February 5, 2008
    Publication date: August 6, 2009
    Inventors: Rosie Jones, Desislava Petkova