DSS acoustic logging adaptive threshold level algorithm discrepancies earthquakes gold nanoparticles hodograph hydrogels implants initial signal regions localization parameters longitudinal and transversal waves loss function magnitude neural network neural network modeling neural network modelling neural network simulation orbital injuries polyvinylformal prediction estimation reconstructive surgery seismic hazard seismic research seismic waves propagation short-term warning source depth sponge the Herglots—Wiechert inversion