INVESTIGATION OF RESONANCE AVOIDANCE METHOD FOR VACUUM CLEANER

Electromagnetic resonance in electric motors arises when the electromagnetic force frequency coincides with any of the motor's natural frequencies, causing excessive vibration and noise.To address this issue, it is crucial to design motors such puffy spa headband that their natural frequencies do not closely align with the electromagnetic fo

Elucidating the water surplus and loss of different vegetation landscapes in cold regions is important for the conservation and management of water resources in alpine inland rivers.As such, this study is to systematically reveal the water variation in different vegetation landscape zones of the alpine inland river basin, delineate its water resour