On the basis of the information from occurrence source presumption device and occurrence

摘要

PROBLEM TO BE SOLVED: To provide a source estimation device and a source estimation method for a diffusion material that solve a problem of numerical instability.;SOLUTION: A source estimation method for a diffusion material includes the steps of: acquiring positional information of observers 5-i (i=1 to n) and information on measured concentration by an observation information acquisition part 21; setting positions of the respective observers as virtual emission points Pvi (i=1 to n) to set an inverse problem using emission intensity of each of the virtual emission points as a value inversely proportional to the concentration information obtained by each of the corresponding observers by an inverse problem setting part 23; executing an inverse analysis by moving the time backward from the measurement time through a numerical analysis of diffusion using a particle method for emission from each of the virtual emission points by an inverse analysis part 26; and evaluating a particle concentration distribution from each of the virtual emission points at each time moved backward to estimate a position and time where and when the diffusion of particle concentration is minimum in a region where the particle concentration is almost the same, as an emission point and emission time by an estimation part 27.;COPYRIGHT: (C)2012,JPO&INPIT