These focus on achievable time-dependent spectrum accuracy, resolution, and tracking, as well as on estimated modal parameter accuracy.
Analogous to the above Wold-Cramer representation, a discrete, time-frequency representation for a sequence with a time-dependent spectrum is possible [11, 12]: (2).
Analogous to the above Wold-Cramer representation, a discrete, time-frequency representation for a deterministic signal with a time-dependent spectrum is possible [13, 20]: (120]
A more rigorous and classical theoretical framework for the description of the non-WSSUS channels was introduced by Matz [2], where instead of the WSSUS scattering function, the local scattering function (LSF), in consonance with the concept of time-dependent spectrum for nonstationary analysis, was defined.
First, conventional FDML sources use a high resolution function generator to manually tune the drive frequency while the extent of synchronization is assessed by the operator by observing the time-dependent spectrum of the source.
Although this scheme has the higher accuracy, the time-dependent spectra results in unavailability of fast Fourier transform (FFT) and thus the simulation efficiency is lower.
Additional simulations, taking into account also differences in PL lifetime in the ensemble, show spectral narrowing and red shift for peak intensity in time-dependent spectra.
Difference spectra were generated by subtracting the time-dependent spectra from the reference spectrum recorded before X-ray exposure.
(A ) Time-dependent spectra for [CH3-Ile]p66∆PL with a twofold excess of unlabeled p66 after dimerization conditions were initiated.
The effect of HOCl traps on chlorite degradation was also monitored by using the diode array detector (Applied Photophysics), which allowed the synthesis of artificial sets of time-dependent spectra as well as spectral analysis of enzyme intermediates.
Routinely, cyanide binding was also monitored by using the diode array detector (Applied Photophysics), which allowed the synthesis of artificial sets of time-dependent spectra as well as spectral analysis of enzyme intermediates.
