Learning based on feedback for contextual personalized information retrieval
First Claim
1. A method for learning user preferences in a search of knowledge base to construct one or more profiles for producing personalized search results, the method comprising:
- using a computer system to execute method steps comprising;
receiving feedback from the user regarding quality of search results presented to the user in a search of a knowledge base that is a semantic network of relationships among concepts and that provides an index of a plurality of documents, the feedback representing how well the search results match an input query provided by the user, the search results including one or more of the documents indexed by the knowledge base;
constructing the one or more profiles for the user based on the feedback received, where for each of the search results that receive feedback, a plurality of feedback values are determined and are used to construct a model that includes profile weights computed from the feedback values;
modifying internal weights used for scoring search criteria applied in producing the search results presented to the user, the modifications made by combining the internal weights with the profile weights in the constructed model, wherein the internal weights are modified according to a function of the internal weights used for scoring search criteria and of the profile weights;
generating implicit search criteria for the user based on the one or more profiles; and
applying the implicit search criteria and modified weights during a subsequent search of the knowledge base conducted by the user producing a subsequent set of search results that are personalized to the user.
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Abstract
Information retrieval systems face challenging problems with delivering highly relevant and highly inclusive search results in response to a user'"'"'s query. Contextual personalized information retrieval uses a set of integrated methodologies that can combine automatic concept extraction/matching from text, a powerful fuzzy search engine, and a collaborative user preference learning engine to provide accurate and personalized search results. The system can include constructing a search query to execute a search of a database, parsing an input query from a user into sub-strings, and matching the sub-strings to concepts in a semantic concept network of a knowledge base. The system can further map the matched concepts to criteria and criteria values that specify a set of constraints on and scoring parameters for the matched concepts. Furthermore, the system can learn user preferences to construct one or more profiles, including combined internal and profile weights, for producing personalized search results.
87 Citations
34 Claims
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1. A method for learning user preferences in a search of knowledge base to construct one or more profiles for producing personalized search results, the method comprising:
using a computer system to execute method steps comprising; receiving feedback from the user regarding quality of search results presented to the user in a search of a knowledge base that is a semantic network of relationships among concepts and that provides an index of a plurality of documents, the feedback representing how well the search results match an input query provided by the user, the search results including one or more of the documents indexed by the knowledge base; constructing the one or more profiles for the user based on the feedback received, where for each of the search results that receive feedback, a plurality of feedback values are determined and are used to construct a model that includes profile weights computed from the feedback values; modifying internal weights used for scoring search criteria applied in producing the search results presented to the user, the modifications made by combining the internal weights with the profile weights in the constructed model, wherein the internal weights are modified according to a function of the internal weights used for scoring search criteria and of the profile weights; generating implicit search criteria for the user based on the one or more profiles; and applying the implicit search criteria and modified weights during a subsequent search of the knowledge base conducted by the user producing a subsequent set of search results that are personalized to the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system for learning user preferences in a search of knowledge base to construct one or more profiles for producing personalized search results, the system comprising:
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at least one computer system; a computer-readable storage medium storing software components for execution by the at least one computer system, the components comprising; an adaptive and collaborative user profiling engine for; receiving feedback from the user regarding quality of search results presented to the user in a search of a knowledge base that is a semantic network of relationships among concepts and that provides an index of a plurality of documents, the feedback representing how well the search results match an input query provided by the user, the search results including one or more of the documents indexed by the knowledge base; constructing the one or more profiles for the user based on the feedback received, where for each of the search results that receive feedback, a plurality of feedback values are determined and are used to construct a model that includes profile weights computed from the feedback values; and a personalized search and match engine for; modifying internal weights used for scoring search criteria applied in producing the search results presented to the user, the modifications made by combining the internal weights with the profile weights in the constructed model, wherein the internal weights are modified according to a function of the internal weights used for scoring search criteria and of the profile weights; generating implicit search criteria for the user based on the one or more profiles; and applying the implicit search criteria and modified weights during a subsequent search of the knowledge base conducted by the user producing a subsequent set of search results that are personalized to the user. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A computer program product having a non-transitory computer-readable medium having computer program instructions recorded thereon for learning user preferences in a search of knowledge base to construct one or more profiles for producing personalized search results, the computer program instruction comprising instructions for:
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receiving feedback from the user regarding quality of search results presented to the user in a search of a knowledge base that is a semantic network of relationships among concepts and that provides an index of a plurality of documents, the feedback representing how well the search results match an input query provided by the user, the search results including one or more of the documents indexed by the knowledge base; constructing the one or more profiles for the user based on the feedback received, where for each of the search results that receive feedback, a plurality of feedback values are determined and are used to construct a model that includes profile weights computed from the feedback values; modifying internal weights used for scoring search criteria applied in producing the search results presented to the user, the modifications made by combining the internal weights with the profile weights in the constructed model, wherein the internal weights are modified according to a function of the internal weights used for scoring search criteria and of the profile weights; generating implicit search criteria for the user based on the one or more profiles; and applying the implicit search criteria and modified weights during a subsequent search of the knowledge base conducted by the user producing a subsequent set of search results that are personalized to the user. - View Dependent Claims (31, 32, 33, 34)
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Specification