Elizabeth Murray

Moreover, in addition to the aforementioned topological one-dimensional (1D) edge state, it is important to highlight that the proposed lattice of silica aerogel metamaterials also supports topological zero-dimensional (0D) corner states. In this regard, the topological phase transition can be understood through the 2D Su-Schrieffer-Heeger (SSH) model, which is characterized by the dipole moment P.

In this paper, a series of impulse response functions between acoustic quantities on the source plane and particle velocity on the hologram plane are derived. In virtue of these functions, real-time nearfield acoustic holography (RT-NAH) is extended from pressure-based to particle velocity. Pressure, normal velocity, acceleration, and displacement radiated from planar sources can be reconstructed by measuring time-dependent particle velocity signals on the hologram plane.

An efficient and precise time-frequency analysis method for real-time ocean bottom seismometer (RTOBS) data in the South China Sea (SCS) is presented. Overcoming the limitations of conventional methods, the method involves temporal segmentation, unique frequency octaves, and Fourier transforms to generate power spectral density (PSD) and probability density function profiles.