Qingdao University of Science and Technology

A Chirp-Rate-Driven Adaptive Window Chirplet Transform and Its Application in Bearing Fault Diagnosis

In this paper, we propose an instantaneous chirp-rate-driven adaptive window Chirplet transform algorithm for the analysis of strong time-varying nonlinear frequency-modulated signals with uncorrelated components. In this approach, the length of the sliding window in the Chirplet...

Combined Effects of Microplastics and Heavy Metals, Pesticides, and Antibiotics in Zebrafish ( Danio rerio ): A Critical Review

ABSTRACT Microplastics (MPs) can modify the partitioning, uptake, and biological effects of co‐occurring contaminants, yet zebrafish studies have reported markedly divergent combined responses. This critical review evaluates co‐exposure to MPs and metals, pesticides, or antibioti...

Tandem Hydroalumination/Oxidation Enables In‐Chain Hydroxyl Functionalization of Polydienes

ABSTRACT The efficient and facile introduction of polar functionalities into the backbone of nonpolar polydienes remains a longstanding goal in polymer science. However, existing approaches largely rely on functional diene derivatives or multistep post‐polymerization functionaliz...

Sampled-data exponential stabilization for delayed complex valued neural networks with quantized intermittent communication

This paper addresses the sampled-data exponential stabilization problem for delayed complex-valued neural networks (DCNNs) over capacity-limited communication channels. To reduce communication load, a quantized intermittent sampled-data transmission (QIST) protocol is proposed. A...

Synergistic Electronic Modulation in Dual-Alkali-Doped CuO for Wide-Window CO2 to C2 Electroreduction

Abstract Electrocatalytic CO2 reduction (CO2ER) to C2 products on Cu-based catalysts is often limited by poor selectivity, narrow potential windows, and competitive hydrogen evolution (HER). Here, a bulk lattice co-doping strategy involving dual alkali metals (Na and K) is develo...

Ligand Recognition Directs Functional Ionic Layer Construction on Metal Nanoclusters for Electrocatalysis

Abstract Cation effects are central to electrocatalytic CO2 reduction, but freely dissolved cations lack positional control, defined function and persistent coupling to surface motifs. Precise regulation of such ionic microenvironments remains difficult in ligand-stabilized metal...

A ROS 2-Based Robotic Platform for Mobile Occupant Sensing and Edge Perception in Buildings

Occupant-centric building operation requires timely information on occupant states and local indoor conditions, but fixed sensors provide limited spatial coverage, and wearables depend on user participation. This study develops a Robot Operating System 2 (ROS 2)-based wheeled mob...

Examining the Role of AI-Assisted Learning in Fostering Students’ Entrepreneurial Intention Within an Interdisciplinary Course Context: An Extended UTAUT-Based PLS-SEM Study

The integration of AI into higher education provides new opportunities for supporting learning in interdisciplinary contexts and fostering entrepreneurial development. However, previous research has mainly focused on AI technology adoption, with limited attention paid to its broa...

Boosting the Methanol Yield of CO2 Hydrogenation by Strengthening Carbon-Mediated Hydrogen Spillover of a Copper–Zinc-Alumina Catalyst

Abstract A copper–zinc–alumina catalyst doped with activated carbon (CZA-0.1AC) is facilely fabricated via the physical mixing method. Mechanistic studies indicate that the intimate carbon–copper contact promotes hydrogen spillover, which suppresses Cu particle aggregation, stabi...

Ultrasonic-Assisted Deep Eutectic Solvent Extraction of Quercetin from Onion Peel: Experimental Optimization and Mechanistic Insights

Abstract This study developed an ultrasound-assisted deep eutectic solvent (DES) platform for the green recovery of quercetin from onion peels. It elucidated the extraction mechanism through process optimization and molecular simulations. Among the screened systems, betaine-malon...

Dual d– p hybridization in Ternary PtGaGe Enables Concurrent Activity and Stability Enhancement for Alkaline Oxygen Reduction

ABSTRACT The activity–stability trade‐off in oxygen reduction reactions (ORR) fundamentally limits the practical development of Zinc–air batteries (ZABs) and fuel cells. Here, we address this long‐standing challenge through spatial electronic engineering that enables dual d–p orb...

Boron‐Doped Carbon Overlayers Conquer Sulfur Poisoning of Nickel‐Based Catalysts for Ultrastable Low‐Energy Hydrogen Production Coupled With Sulfion Oxidation

ABSTRACT Replacing the oxygen evolution reaction with the sulfion oxidation reaction (SOR) offers a promising route to low‐energy hydrogen production, yet conventional catalysts are rapidly deactivated by sulfur poisoning. Herein, we report a boron‐doped carbon‐coated nickel cata...

Flexible and Regenerable Organic Photoelectrochemical Transistors With MXene‐Induced Ohmic Interfaces for Dopamine Sensing

ABSTRACT Flexible organic photoelectrochemical transistor (OPECT)‐based sensors hold promise for noninvasive healthcare monitoring; however, achieving the simultaneous integration of mechanical flexibility, high sensitivity, and regenerability remains a significant challenge. Her...

A Study on the Metaphor Judgement and Comprehension of EFL in Chinese Universities—Taking Senior English Major Students as Example

ABSTRACT: Metaphor comprehension remains a central concern in linguistic research. This study investigates metaphor judgment and comprehension among senior English majors from five types of Chinese universities—Project 985, Project 211, language-featured, normal, and basic public...

Selective Hydrogenation of α,β‐Unsaturated aldehydes to Unsaturated alcohols: From Metal Nanoparticles to Nanoclusters and Single‐Atom Catalysts

The selective hydrogenation of α,β‐unsaturated aldehydes is a pivotal process for synthesizing fine chemicals, fragrances, and pharmaceuticals. However, achieving high chemoselectivity to unsaturated alcohols remains a significant challenge due to the thermodynamic and kinetic pr...

Protein‐Stabilized Copper Nanoclusters for Microbial Inhibition‐Enabled Fresh Produce Preservation and Pesticide Removal

ABSTRACT Fresh produce safety is compromised by microbial spoilage and pesticide residues, posing global health risks and economic losses. Although metal nanoclusters (NCs) offer promising functionalities, their composition‐dependent activity remains underexplored. Here, bovine s...

Analysis and identification of gas–liquid two-phase flow pattern based on variational mode decomposition and mutual information complex network

Abstract The identification of gas–liquid two-phase flow patterns is crucial to fluid dynamics research and industrial applications. This study proposes a novel flow pattern identification framework that integrates variational mode decomposition (VMD), complex network analysis, a...

Ag-Mediated Sulfonyl-Alkenylationof Unactivated Alkynesvia Intramolecular C(sp2)-H Cyclization toward 1,2-Dihydropyridines

Abstract 1,2-Dihydropyridines and sulfonyl compounds are widely found in bioactive molecules and functional materials. Herein, a silver-mediated radical sulfonyl-alkenylation of vinylamino-linked alkynes with sodium sulfinates via intramolecular C(sp2)-H cyclization for producing...

Efficient Discovery of Motif Transition Process for Large-Scale Temporal Graphs

Understanding the dynamic transition of motifs in temporal graphs is essential for revealing how graph structures evolve over time, identifying critical patterns, and predicting future behaviors, yet existing methods often focus on predefined motifs, limiting their ability to com...

Multidimensional Social Interaction and School Refusal Tendency Among Elementary and Junior High School Students: A Three-Year Longitudinal Study with an Exploratory Indirect-Association Analysis

Background/Objectives: School refusal tendency is an important school adaptation issue, but its upstream psychosocial correlates remain insufficiently understood. We examined whether baseline multidimensional social interaction was prospectively associated with later school refus...