With this complexity, the multi-frequency approach to inverse scattering and finite-frequency tomography becomes computationally feasible with large data sets, in dimensions d = 2 and 3.
The rose diagrams in Fig. 4(B) show the multi-site-multi-frequency approach results for the three AMT profiles.
Although the offered degrees of freedom are less than those of the multi-frequency approach for proportional spectra, they exceed those offered by single-frequency co-prime array with sparse reconstruction.
The single-device structure of the dual-mode resonator is believe to be a promising solution to eliminate the loading effect and noise as a result of multiple switches and other parallel connected resonators, and has the potential to reduce the size and complexity of packaging, compared with the multi-resonator multi-frequency approaches.
Numerical examples demonstrated the superior performance of the proposed multi-frequency approach compared to its single-frequency counterpart.
Performance evaluation of the proposed multi-frequency approach is performed using numerical simulations for both cases of proportional and nonproportional source spectra.
Although the geo-electrical strike directions, calculated as a result of a site-by-site analysis of GB decomposition, do not often suggest a wide range on some AMT-B sites (Fig. 4(A)), the multi-site-multi-frequency approach yielded a similar value as suggested by the phase tensor ellipses.
An alternative hypothesis is that acoustically similar scattering layers may differ in the amount of prey that is of interest to beaked whales requiring either a multi-frequency approach (e.g. [56]) or additional sampling gear necessary to tease apart the composition of the deep scattering layer.
The multi-site and multi-frequency decomposition approach of McNeice and Jones (2001) was applied to identify and analyze galvanic distortions and to determine the most appropriate geoelectric strike direction over the profile.
Though shown to be effective at smoothing out multi-frequency noise, this approach can significantly degrade intricate, subtle or high frequency detail.
The usual-frequency approach.
