Patent ID: 8521466

Claim:
A method for determination of interface particles for determining particles positioned on an interface of a subject to be analyzed, the method for determination being used in a particle method in which the subject to be analyzed is expressed as an assembly of particles and motion of the particles is analyzed by calculations, comprising: a density acquiring step of acquiring density in a predetermined range based on a determining-target particle; a first discriminating step of comparing the density with a predetermined threshold; a second discriminating step of determining a symmetry of an arrangement of the other particles within a single predetermined range based on the determining-target particle; and a determining step of determining the determining-target particle as an interface article in the case that the density determined by the first discriminating step is found to be smaller than the predetermined threshold and the arrangement of the other particles determined by the second discriminating step is found to be asymmetrical, wherein the second discriminating step determines that the arrangement of the other particles is asymmetrical in the case that a sum of differences between a coordinate of the determining-target particle and a coordinate of each of the other particles within the single predetermined range exceeds a predetermined threshold.