Yantai University

Disturbance estimator-based robust tracking control of an unmanned surface vessel with transient norm bound

This paper investigates the control problem of an unmanned surface vessel system in the presence of external disturbance. The dynamic model of an unmanned surface vessel is first introduced. Then, a nonlinear disturbance estimator is designed to estimate the external disturbance....

One-Pot Cation Exchange−Polymerization Enables FeCoNi-Rich Hollow Magnetic Nanotubes for Boosted Low-Frequency Electromagnetic Wave Absorption

Abstract The rational engineering of magnetic-dielectric absorbers embedded with abundant FeCoNi alloy nanoparticles holds great promise for low-frequency electromagnetic wave (EMW) absorption. However, developing a synthetic approach that simultaneously achieves well-dispersed n...

Hydrogel and Organogel-Based Flexible Wearable Sensors: Synthesis, Sensing Mechanisms, Performance Optimization, and Applications

Hydrogel-based flexible sensors have emerged as a promising platform at the intersection of materials science, flexible electronics, and biomedical engineering, owing to their tissue-like mechanical compliance, tunable ionic conductivity, and versatile chemical functionalizabilit...

Blood flow restriction of sport-specific repeated-sprint training enhances acute physiological responses in elite female boxers: a randomized, crossover trial

This study investigated the acute physiological responses during sport-specific repeated sprint training with different levels at blood flow restriction (BFR) in elite boxing athletes. Sixteen female boxers participated in this randomized, cross-over study. All boxers conducted f...

Plant litter promotes nitrate–sulfate co-removal in constructed wetlands: DOM dynamics and metagenomic insights into carbon, nitrogen, and sulfur transformations

Plant litter is a low-cost carbon source for constructed wetlands (CWs), but its effectiveness and associated microbial mechanisms in nitrate–sulfate co-contaminated wastewater remains insufficiently understood. This study evaluated cattail and reed litters as in situ carbon sour...

Rub-impact fault diagnosis for rotating blade using covariance-reconstructed MVDR and BTT data

Blade Tip Timing (BTT) is a crucial technique for monitoring the health status of rotating blades in aero-engines. However, the inherently severe non-uniform under-sampling characteristics of BTT signals make the extraction of early fault features highly challenging. To address t...

Diagnostic efficiency of serum-based fourier transform infrared spectroscopy for brain tumors: a systematic review and meta-analysis

Fourier transform infrared (FTIR) spectroscopy has been widely explored as a non-invasive diagnostic tool in oncology. However, the overall diagnostic performance of serum-based FTIR spectroscopy for brain tumor detection has not been systematically evaluated. This meta-analysis...

Concentration‐Dependent Electrochemical Corrosion Inhibition and Interfacial Film Evolution of Nettle Extract on Carbon Steel in Chloride‐Containing Simulated Concrete Pore Solution

ABSTRACT Natural nettle extract was evaluated as a corrosion inhibitor for carbon steel in chloride‐containing simulated concrete pore solution containing 3.5 wt% NaCl and saturated Ca(OH) 2 (pH 13.5) using time‐resolved OCP, EIS, potentiodynamic polarization, adsorption thermody...

Performance Evaluation of a Novel Solar Thermal Water Heating System Integrated with Thermal Energy Storage: A New Zealand Case Study

This study evaluates a solar thermal water heating system integrated with thermal energy storage (TES) for domestic hot water supply in New Zealand. A conventional system without TES was first assessed as the baseline case and then compared with a TES-integrated system using Para...

Global-Scale Diagnoses of Tropical Cyclone Maximum Wave Heights from 5 Km GPM Retrievals and Their Implications for Reanalysis Bias

Tropical cyclone (TC) inner-core maximum wave height (MWH) measurements are virtually absent, forcing reliance on reanalyses such as ERA5. Using a GPM-retrieved dynamic MWH product on a 5 km pixel grid, 165 global TC–GPM overpass cases of tropical-storm intensity and above, drawn...

Perfect matchings and Aα-spectral radius in 1-binding graphs

Let G be a graph with vertex set V ( G ) and edge set E ( G ) . For α ∈ [ 0,1 ] , we use A α ( G ) and ρ α ( G ) to denote the A α -matrix and the A α -spectral radius of G , respectively. The binding number bind ( G ) of G is defined by bind ( G ) = min | N G ( X ) | | X | : 0̸...

When Bad Feels Better: How Negative Online Brand Engagement Transforms Into Consumer Happiness

ABSTRACT Brands are increasingly prioritizing consumer happiness alongside profit, yet research offers limited guidance on fostering this in negative consumer‐brand contexts. Drawing on the broaden‐and‐build theory, this work models consumer pathways from anti‐consumption and dis...

Modulus-matched epidermal biointerfaces for robust surface electromyography sensing

Surface electromyography (sEMG) has emerged as a promising modality for intuitive and efficient human–machine interfacing. However, mismatches in Young’s modulus between conventional epidermal electrodes and human skin often lead to poor interfacial contact, resulting in unstable...

Extremophilic Microalgae and Cyanobacteria as Platforms for Climate Resilience, Circular Resource Utilization and Bioprospecting

The untapped genetic diversity of extremophilic microalgae provides distinctive physiological and biochemical traits with potential to support Sustainable Development Goal (SDG) 6 (Clean Water and Sanitation), SDG 7 (Affordable and Clean Energy), and SDG 15 (Life on Land). This r...

An Activated Searching of Revitalizing World Best Companies Status in 2026 &its Estimation Sustainably

The cities’ GDP will compare different ones for seeing the variation among the similar ones know how they would improve that one through analyzing the local situation and its surround cities and meantime learn the priority and better ones’ experience from other excellent places a...

Searching for Booming Shanghai Ranking's Global of Academic Subjects Status &its Estimation Sustainably

The cities’ GDP will compare different ones for seeing the variation among the similar ones know how they would improve that one through analyzing the local situation and its surround cities and meantime learn the priority and better ones’ experience from other excellent places a...

Upcycling Waste Fruit Bags into Hierarchical Porous Carbon for High-Performance Zinc-Ion Hybrid Supercapacitors

Abstract The rational design of hierarchical porous heteroatom-doped carbon is critical for advancing the practical application of zinc-ion hybrid supercapacitors (ZIHSs). Herein, we propose a sustainable upcycling strategy to convert waste fruit bags into N/O-codoped porous carb...

Research on the integration method of power transfer and data communication based on LCL resonant topology

To address the limitations of traditional Power Line Carrier (PLC) communication, which can only transmit weak signals and struggles to balance high-power supply in strong interference environments, this paper proposes a power and signal integration method based on an LCL resonan...

Neutron diffraction investigation of residual stress and texture in additively manufactured AISI 410 and 316L steel plates produced by LPBF and DED

Residual stresses pose a significant challenge in additive manufacturing, particularly for large metal parts. Monitoring these stresses is essential to achieving reliable performance characteristics. Neutron diffraction—a nondestructive method that measures residual stresses thro...

A Robust and Lubricating Hydrogel through a High‐Energy‐Storage and Low‐Dissipative Network Design

ABSTRACT Hydrogels are promising joint‐lubrication materials because of their similarity to cartilage. However, most tough hydrogels rely on sacrificial bonds or dissipative networks to improve mechanical strength. These mechanisms inevitably introduce additional bulk energy diss...