| 摘要 |
<p>Provided are device and a method which can acquire characteristics concerning a temporal change of oscillation. An oscillation acquisition unit (1) acquires oscillation data in a plurality of positions. A frequency analysis unit (2) analyzes oscillation data by using the wavelet conversion, for example. Thus, it is possible to generate multi-dimension vector data as a function of time and frequency. A multi-layer factor analysis unit (3) uses the multi-dimension vector data to generate a plurality of independent vectors. At least one of the vectors generated by the multi-layer factor analysis unit (3) expresses the temporal characteristic of the oscillation.</p> |
