Fujitsu Corporation

Hiroyuki Torii

Masahiro Kataoka

Masahiro Kurishima

Hideo Kasai

An information retrieval apparatus including a first detecting unit that detects a feeder indicative of a presence of a numerical value in a file subject to retrieval in which a numeral and a character are present together; a second detecting unit that detects a number of places in the numerical value correlated to the feeder detected by the first detecting unit; and a compressing unit that compresses the numerical value into compressed information including a compression code for a numeral indicative of the number of places detected by the second detecting unit and a compression code for a numeral at each place in the numerical value, wherein the numerical value is correlated to the feeder based on an appearance frequency of a numeral included in the file.

Information retrieval method, information retrieval apparatus, and computer product

An information retrieval apparatus includes an acquiring unit that acquires a numerical value defining a boundary of a numerical range; a detecting unit that detects a number of places in and a head numeral of the numerical value; an extracting unit that extracts from a bit string group, a bit string indicating whether a numerical value in a numerical value group having the number of places and the head numeral is present in files subject to retrieval; a specifying unit that specifies a file corresponding to a bit in the extracted bit string, the bit indicating the presence of a numerical value of the numerical value group; a determining unit that determines whether a numerical value in the specified file meets the boundary condition; and a designating unit that, based on a determination by the determining unit designates the specified file to have a numerical value within the numerical range.

Growing community of inventors

Kawasaki, Japan

Hiroyuki Torii