1504results about How to "Improve predictive performance" patented technology

The present invention relates to a system and methodology to facilitate extraction of information from a large unstructured corpora such as from the World Wide Web and / or other unstructured sources. Information in the form of answers to questions can be automatically composed from such sources via probabilistic models and cost-benefit analyses to guide resource-intensive information-extraction procedures employed by a knowledge-based question answering system. The analyses can leverage predictions of the ultimate quality of answers generated by the system provided by Bayesian or other statistical models. Such predictions, when coupled with a utility model can provide the system with the ability to make decisions about the number of queries issued to a search engine (or engines), given the cost of queries and the expected value of query results in refining an ultimate answer. Given a preference model, information extraction actions can be taken with the highest expected utility. In this manner, the accuracy of answers to questions can be balanced with the cost of information extraction and analysis to compose the answers.

An embodiment of the invention provides a motion trajectory prediction method and device for an obstacle at an intersection. The method herein comprises: acquiring ambient information of an intersection which a vehicle is to cross and visual obstacle information in a vehicle sensing range; fusing intersection obstacle information and the visual obstacle information, and screening out blind-area obstacle information of the vehicle at the intersection; predicting a motion trajectory of the obstacle corresponding to the blind-area obstacle information according to road information. The device herein comprises: an acquisition module for acquiring ambient information of an intersection which a vehicle is to cross and visual obstacle information of the vehicle; a fusion module for screening outblind-area obstacle information of the vehicle at the intersection; a trajectory prediction module for predicting a motion trajectory of the obstacle corresponding to the blind-area obstacle information. The ambient information of the intersection is acquired according to the embodiment; therefore, the problem is solved that a sensing blind area occurs before a vehicle arrives at the intersection,and the capacity of the vehicle to predict intersection obstacles is improved.