| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform diffusion calculation precisely while shortening a processing time. <P>SOLUTION: A diffusion state prediction device is provided with a calculation grid determination unit 2 which determines a size of a calculation grid dividing a space in an area of interest, a boundary setting calculation unit 31 which reads a building shape of a high-rise building which is a building higher than a length of one side of the calculation grid from a building shape database 1, sets the building shape to a boundary condition, and performs the diffusion calculation of the area of interest, and a resistor calculation unit 32 which reads, from the building shape database 1, one or a plurality of calculation grids surrounding a resistor group as low-rise calculation grids which is a plurality of low-rise buildings which are buildings lower than the length of one side of the calculation grid, determines a resistance coefficient on the basis of the space occupancy of the resistor group within the low-rise calculation grids, and performs the diffusion calculation of the area of interest. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
