| 摘要 |
PURPOSE: To shorten the computing time of wave data and to reduce the capacity of main storage. CONSTITUTION: A dividing means 2 divides an analysis area into plural blocks in size larger than that of a discrete lattice consisting of several discrete points required for the analysis of the wave data. A judging means 4 judges whether or not the wave data of the discrete point included in each block divided by the dividing means 2 and decided in advance in all the discrete points is larger than a prescribed value at every block. A calculation means 6 calculates the spatial and temporal fluctuations of the wave data of all the discrete points included in only the block in which the wave data of a judged discrete point is larger than the prescribed value. |
