System and method for query expansion using knowledge base and statistical methods in electronic search

摘要

Systems, devices, and methods include generating, for at least one search term of a query, a first expanded set of search terms based on at least one related term of the at least one search term obtained from a knowledge base, generating a second expanded set of search terms by applying a statistical model to the search terms of the first expanded set based on terms included in an electronic document corpus stored in an electronic data storage, and generating a third expanded set of search terms based on search terms in the first and second expanded sets. For each search term of the third expanded set, a term score is determined based on occurrence of the search term in the electronic document. The term scores are combined to create a document score for the electronic document.