| 查看: 448 | 回复: 2 | ||
[求助]
请信号处理高手翻译一下关于S变换和TT变换的英文，谢谢！
|
|
1、A novel technique of analysis of an arbitrary primary time series into a set of secondary, timelimited,local, constituent time series, the TT-transform, is presented. The time–time representation is derived from the S-transform, a method of representation of a real time series as a set of complex, time-localized spectra.When integrated over time, the S-transform becomes the Fourier transform of the primary time series. Similarly, when summed over the primary time variable, the TT-transform reverts to the primary time series. The invertibility of the TT-transform points to the possibility of filtering and signal to noise improvements in the time domain, and some insight into the localized spectra of the S-transform. 2、we present a two-dimensional time–time representation of a onedimensional time series, based upon the S-transform. This is termed the TT-transform. One of the major utilities of the TT-transform is the time-local view, through the scaled windows, of the primary time series. This aids in the interpretation of the S-transform. In fact, we recommend that the S-transform and TT-transform be always looked at as a side by side pair, thus avoiding interpreting artifacts as real information and vice versa. Our experience suggests that similar procedures be followed for all spot transform techniques, such as wavelet transforms. 3、In this paper we have presented the TT-transform, a new view of localizing the time features of a time series around a particular point on the time axis. The TT-transform is derived from the S-transform [4] and differs from windowed time series in that (as in the S-transform) the degree of localization of signal components is frequency dependent rather than frequency invariant. When examined along with the S-transform, the TT-transform provides a better understanding of the time-local properties of the time series than the S-transform alone. In some instances it may also clarify the nature of artifacts introduced into the S-transform by the windowing process. The TT-transform has potential use in any applications which involve localization of different frequency components of a signal. The method can also be extended to produce a two-dimensional TT-transform [12], or localized image, derived using the two-dimensional S-transform [13,14]. |
回复此楼» 猜你喜欢
本科新能源科学与工程，一志愿华理能动285求调剂
已经有5人回复
-
一志愿华北电力大学能动专硕，293，求调剂
已经有5人回复
-
调剂310
已经有7人回复
-
食品工程专硕一志愿中海洋309求调剂
已经有6人回复
-
275求调剂
已经有14人回复
-
283求调剂
已经有3人回复
-
085602 化工专硕 338分 求调剂
已经有12人回复
-
312，生物学求调剂
已经有3人回复
-
化学0703 调剂 306分 一志愿211
已经有4人回复
-
311（085601）求调剂
已经有3人回复
第一次发帖，自己顶一下 
2楼2011-08-22 16:16:28
8814402
至尊木虫 (职业作家)
- 翻译EPI: 509
- 应助: 18 (小学生)
- 贵宾: 0.381
- 金币: 12916.1
- 散金: 47
- 红花: 16
- 帖子: 4183
- 在线: 357.8小时
- 虫号: 1184404
- 注册: 2011-01-06
- 专业: 药物学其他科学问题
3楼2011-08-25 14:57:22
