Underwater acoustic (UWA) channels are inherently complex, with pronounced variability arising from multipath propagation, time variability, Doppler effects, and nonstationary ocean conditions. Such variability often leads to unstable communication reliability when conventional single-carrier signaling and fixed reception strategies are employed. In practical UWA environments, performance degradation may occur when channel cha...

The Chinese sturgeon ( Acipenser sinensis ) and Yangtze sturgeon ( A. dabryanus ) are critically endangered flagship species. To investigate the intestinal microbial changes associated with bacterial enteritis in captive populations, we integrated bacterial isolation with metagenomic sequencing to characterize both healthy and maladjusted gut microbiomes. Healthy sturgeons exhibited a stable microbiota dominated by the benefic...

Seabed scour seriously endangers the stability of fixed offshore wind turbine foundations, while conventional protection methods suffer from environmental and constructability flaws, and the deepwater deployment dynamics of large-scale permeable frame-type anti-scour structures remain unstudied. To fill this gap, this study deduces the theoretical motion equations for a six-sided twelve-sided permeable protective frame, and co...