Propulsors are essential power units for underwater vehicles and major sources of self-noise, with unsteady pressure pulsations linked to flow-induced noise. To study the impact of guide vane case on the hydrodynamic performance and pressure pulsation of a shaftless pump-jet thruster, six guide vane configurations were first compared under a reference operating condition of 600 rpm: a vaneless baseline, fixed vertical guide va...

The large yellow croaker (Larimichthys crocea) is a high-value marine fish, but stress during live transport often leads to physiological disturbance and deterioration of muscle quality. This study investigated the effects of pre-transport temporary rearing at three temperatures (8, 10, and 12 °C) over 48 h on stress response, energy allocation, and muscle quality in this fish species. Temporary rearing at 8 °C induced stronge...

As critical end-effectors enabling the practical deployment of marine robotic systems, soft hands face persistent challenges including multi-finger asynchronization, unbalanced force distribution, and insufficient anti-disturbance robustness, compounded by constraints from soft material nonlinearity and harsh marine environmental disturbances. To address these limitations, this paper proposes a dexterous grasping method integr...