Qingdao Huanghai University

Analytical study on the vibration of spatial plate-plate coupled structures with combined simply supported and clamped edges

Spatial plate-plate coupled structures (cross, L, and T-shaped) are fundamental elements in engineering, yet a unified solution covering multiple coupling configurations, arbitrary coupling angles, and combined simply supported-clamped boundaries remains unavailable. This study d...

Signal-Processing Procedure for Preliminary Concrete Anomaly Screening Based on Continuous Sliding Acoustic Excitation

Internal discontinuities in concrete walls are hidden conditions that can compromise local structural capacity and durability. Rapid and objective on-site anomaly screening is therefore important for structural integrity evaluation. This paper presents a signal-processing procedu...

Experimental Study on the Identification of Impact-Induced Secondary Damage Inside Concrete Based on Multi-Domain Vibration Signal Indicators

A large number of in-service concrete components in infrastructure are prone to internal secondary damage, which seriously threatens the long-term safety of structures. To effectively identify internal secondary damage in concrete structures and reveal the influence of cracks on...

Ion Sensing in Concentrated Lithium-Ion Solutions by Oxide Solid Electrolytes and Activity-Coefficient Correction

Abstract The accurate detection of lithium ions (Li+) is crucial for therapeutic drug monitoring and lithium resource recovery and extraction, yet current electrochemical sensors based on polymeric membranes suffer from signal drift and short lifetimes in concentrated solutions....

Multi-objective optimization of industrial washing machine under extreme working load conditions

To solve the engineering problems of severe vibration in the dehydration stage, insufficient reliability of load-bearing components, and the difficulty in balancing lightweight design and dynamic performance of industrial washing machines, mechanical performance analysis of key l...

Associations of self-efficacy and learning engagement with humanistic caring ability among vocational college nursing students: a structural equation modeling study

Previous studies have investigated the associations of humanistic caring ability (HCA) with self-efficacy (SEF), or learning engagement (LN) among college students. There has been a lack of studies that examine the mediation effect of learning engagement between SEF and humanisti...