The high passing property of the vertical split-ring resonator (VSRR) on the wide region is utilized to improve the front-to-back ratio at least −2.1 dB over the wideband. In addition, the gain on the ...

Seasonal migration of aerial animals have the characteristics of layer concentration at large scale. The large-scale horizontal homogeneity of the migratory animals causes dumbbell-shaped or ...

The pilotless passenger-carrying electric vertical takeoff and landing (eVTOL) aircraft can not only be used in urban air mobility providing air commuting and transfer services, but can also deploy ...