| 主权项 |
1. A search device, including a memory and at least one processor, comprising:
a search unit, within said processor, configured to extract a search target matching a search condition specified by a user based on profile data of the search target generated based on a document extracted from a specified database, the profile data containing an identifier for identifying the search target, creation time of the document, and a frequency of appearance for each topic obtained by classifying words in the document into one or more topics; and an output unit, within said processor, configured to output the search target extracted by the search unit for presentation to a user, wherein the memory stores the extracted search target; the search condition includes a first frequency of appearance for each of one or more specified topics specified by the user in a first specified period and a second frequency of appearance for each of the one or more specified topics in a second specified period, the second specified period being later than the first specified period, the search unit extracts the search target when:
the frequency of appearance for each of the one or more specified topics in a first search target period, as obtained from the profile data of the search target, is identical or similar to the first frequency of appearance, andthe frequency of appearance for each of the one or more specified topics in a second search target period, which is later than the first search target period, as obtained from the profile data of the search target, is identical or similar to the second frequency of appearance,when there are a plurality of specified topics,
said at least one processor determines when a percentage of a frequency of appearance of at least one of the plurality of specified topics is changed with respect to a sum total of frequencies of appearances of all of the plurality of specified topics, andsaid at least one processor adjusts percentages of frequencies of appearances of remainder of the plurality of specified topics, other than the at least one of the plurality of specified topics, based on the determination,the frequency of appearance of the at least one of the plurality of specified topics in the first search target period, as obtained from the profile data of the search target, is identical or similar to a changed frequency of appearance of the at least one of the plurality of specified topics in the first specified period,the frequency of appearance for each of the one or more specified topics in the second search target period, which is later than the first search target period, as obtained from the profile data of the search target, is identical or similar to the second frequency of appearance for each of the one or more specified topics in the second specified period, the second specified period being later than the first specified period,the percentages of frequencies of appearances of the remainder of the plurality of specified topics in the first specified period are adjusted based on frequencies of appearances corresponding to specified topics in the first search target period of the extracted search target, anda before-after relationship between the first search target period and the second search target period corresponds to a before-after relationship between the first specified period and the second specified period. |
