Creeping waves in boreholes and cavities

Application of DFT for the modeling of the valence region photoelectron spectra of boron and d‐element complexes and macromolecules

“…In addition to ferrocene, results for the derivatives of other iron and chromium p-complexes (bis(benzene)chromium (g 6 -C 6 H 6 )Cr(g 6 -C 6 H 6 ), benzene chromium tricarbonyl (g 6 -C 6 H 6 )Cr(CO) 3 , and cyclobutadiene-iron tricarbonyl (g 4 -C 4 H 4 )Fe(CO) 3 ) have been reported. [38,[54][55][56][57] It has been shown that the d values and localization degree of 3d AOs are stable and universal. Figure 7 shows the relationship between the averaged DFA defect and the contributions of the AOs of the d-metal for all investigated p-complexes.…”

To the ray tomography problem for creeping waves

“…Therefore, in the general case of an arbitrary surface, the wave velocity depends on the direction of propagation, and the reference model of the surface velocity proves to be anisotropic even if the medium itself is isotropic. A direct comparison of ultrasonic modeling data with theoretical predictions based on the boundary layer method also confirms this conclusion [3]. Therefore, here the situation is completely different from that of inverting traveltimes for body waves, and application of conventional tomographic programs, designed for traveltime data of body waves, can result in wrong conclusions.…”

“…In this note, such a phenomenon is illustrated with the inversion problem for the waves creeping along the concave surface of a cylindrical cavity filled with a fluid and placed in an elastic medium. In accordance with [3], the velocities Vp and Vs of the first arrivals of P and S creeping waves are as follows:…”