The energy harvesting capability of a graded metamaterial is maximised via reinforcement
learning (RL) under realistic excitations at the microscale. The metamaterial consists of a …

The rainbow trapping phenomenon of graded metamaterials can be combined with the
fractal spectra of quasiperiodic waveguides to give a metamaterial that performs fractal …

The generalised eigenfunction expansion method (GEM) and the singularity expansion
method (SEM) are applied to solve the canonical problem of wave scattering on an infinite …

The rainbow reflection effect describes the gradual slowing down of a wave and the
simultaneous spatial separation of its spectral components, which occurs in spatially graded …

Abstract rainbow reflection Bloch waves complex resonance time domain wave scattering
spectral methods singularity expansion method generalised eigenfunction expansion …

When the elastic wave propagates in the special graded structure, the spatial frequency
division and the wave energy concentration will emerge, which is called the rainbow …

The study of nonlinear phenomena is concerned in the field of natural science and even
social science. Since many phenomena in nature are essentially nonlinear, nonlinear …