| 摘要 |
PROBLEM TO BE SOLVED: To accurately present information desired by a user at that point of time.SOLUTION: A feature score calculation part 120 acquires a first condition list in which a plurality of concepts as the selection candidates of narrowing-down conditions in a concept system are browsed as a list and a second condition list including the concept selected by a user from this, and searches analysis parameters S', N', a' and n' from the first condition list and the second condition list, and calculates first probability that the number of the concepts which appear in the second condition list becomes n' or more and second probability that the number of the concepts which appear in the second condition list becomes n' or less under the conditions of the analysis parameters S', N' and a', and calculates feature scores from the inverse functions of the cumulative distribution functions of standard normal distribution on the basis of the first probability and the second probability. A concept system update processing part 130 updates user interest scores with respect to the concept by using the calculated feature scores. |
