https://scholars.lib.ntu.edu.tw/handle/123456789/626266
標題: | Entropy-based time-varying window width selection for nonlinear-type time–frequency analysis | 作者: | Sheu Y.-L Hsu L.-Y PI-TAI CHOU Wu H.-T. |
關鍵字: | Adaptive optimal window width; Attosecond physics; Nonlinear-type time–frequency analysis; Time-varying optimal window width | 公開日期: | 2017 | 卷: | 3 | 期: | 4 | 起(迄)頁: | 231-245 | 來源出版物: | International Journal of Data Science and Analytics | 摘要: | We propose a time-varying optimal window width (TVOWW) and an adaptive optimal window width selection schemes to optimize the performance of several nonlinear-type time–frequency analyses, including the reassignment method and its variations. A window rendering the most concentrated distribution in the time–frequency representation is regarded as the optimal window. The TVOWW selection scheme is particularly useful for signals that comprise fast-varying instantaneous frequencies and small spectral gaps. To demonstrate the efficacy of the method, in addition to analyzing synthetic signals, we study an atomic time-varying dipole moment driven by two-color mid-infrared laser fields in attosecond physics and near-threshold harmonics of a hydrogen atom in the strong laser field. © 2017, Springer International Publishing Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85033564534&doi=10.1007%2fs41060-017-0053-2&partnerID=40&md5=f37ace8c844762bd6d97ce10df976cb5 https://scholars.lib.ntu.edu.tw/handle/123456789/626266 |
ISSN: | 2364415X | DOI: | 10.1007/s41060-017-0053-2 | SDG/關鍵字: | Atoms; Optical parametric oscillators; Optimal systems; Attosecond physics; Frequency Analysis; Instantaneous frequency; Midinfrared lasers; Optimal window-width; Reassignment method; Strong laser field; Time-varying dipole moment; Atom lasers |
顯示於: | 化學系 |
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