Patent ID: 7574436

Claim:
A method for increasing the relevance of search results retrieved from searches, the method comprising the machine-implemented steps of: identifying one or more units in a search query, wherein each of the one or more units corresponds to one concept in the search query; selecting one or more concepts in a concept network that are related to the one or more units in the search query, wherein the concept network comprises a plurality of concepts; wherein selecting the one or more concepts includes determining how frequently a subset of the plurality of concepts appeared in previous search queries that were submitted by a plurality of users, wherein the one or more concepts appeared more frequently in the previous search queries relative to other concepts in the concept network; using the search query to perform a search; sorting search results retrieved from the search based on a relevance of the search results to the search query, wherein each of the search results includes a title and an abstract of the search result; and reranking the search results based on occurrences of the one or more concepts in the title or abstract of the each of the search results.