POPULATION EXTRACTION DEVICE

WIPO Patent Application WO/2021/215096

A1

This population extraction device comprises: a time-series population acquisition unit which acquires daily and hourly demographic data in a certain period of time in a target area, and extracts the population at each same predetermined time zone from the acquired daily and hourly demographic data to acquire a time-series population in a predetermined time zone on each day; a clustering unit which clusters the time-series population in a predetermined time zone on each day into a plurality of classes on the basis of the similarity of fluctuations; a determination unit which determines a class on an event-free day, on the basis of the degree of fluctuation in each class, among the plurality of classes obtained; a stationary population derivation unit which derives the time-series average population of the class on the event-free day as the time-series stationary population of the target area; and a population extraction unit which extracts, as an event-related population of the target area, a difference between the time-series population and the time-series stationary population on a target day in the target area.

ISHIKAWA SHU (JP)
FUKAZAWA YUSUKE (JP)
KAWASAKI SATOSHI (JP)
ISHIGURO SHIN (JP)
MIMURA TOMOHIRO (JP)

PCT/JP2021/005959

October 28, 2021

February 17, 2021

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NTT DOCOMO INC (JP)

G06Q10/04; G06F16/906; G06Q50/10

WO2018154958A1

2018-08-30

JP2009098446A	2009-05-07
JP2011108193A	2011-06-02

HASEGAWA Yoshiki et al. (JP)

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