Yanshan University

Superconducting Hydride Mg2RhH6 Experimentally Achieved at Lower Pressure

Abstract Although tremendous progress has been made in recent years in the field of polyhydride superconductors, the realization of high critical temperature (Tc) superconductivity still relies on formidable high pressures. Searching for superconducting hydrides at lower pressure...

Ultra-Short Hollow-Core Anti-Resonant Fiber Polarization Filter Covering C+L Band Based on SPR Effect

This paper proposes an ultra-short hollow-core anti-resonant fiber (HC-ARF) polarization filter covering the C+L communication band based on the surface plasmon resonance (SPR) effect. The structure consists of six composite tubes, each formed by nesting an elliptical cladding tu...

Topology-Evolving Image Encryption Algorithm Utilizing 2D Rosenbrock–Schwefel Hyperchaotic Map

Traditional image encryption methods based on static permutation and diffusion are vulnerable to structural cryptanalysis and usually show limited resistance to channel interference. To address these problems, this paper proposes a robust topology-evolving image encryption algori...

Effective Measurement of the Influence of an Ovoidal Particle Shape on the Tortuosity and Permeability: Theoretical and Numerical Studies

An ovoid is a common particle, which is usually formed by constant extrusion and friction during running water handling. However, there is still debate over how the form of ovoidal particles affects the tortuosity and water permeability of particle packing systems. The tortuosity...

RTGNet: A Dual-Branch Network Integrating Recurrent Texture and Temporal Dynamics from sEMG for Lower-Limb Joint Angle Prediction

Accurate continuous prediction of lower-limb joint angles from surface electromyography (sEMG) remains challenging because of the nonlinear, non-stationary, and subject-specific nature of sEMG signals, which can reduce robustness and lead to degraded prediction accuracy during hi...

Open-set fault diagnosis of rolling bearings via class similarity-guided graph convolutional adversarial network with adaptive channel feature relation fusion

To address the challenges in open-set fault diagnosis of rolling bearings, such as the vague demarcation of features between known and unknown class faults, as well as the difficulty in capturing the latent correlations among samples, this paper proposes a class similarity-guided...

The competition and cooperation mechanism of policy goals in China’s diagnosis-related group: a quantitative analysis based on the BERTopic and Lotka-Volterra models

Aiming at the practical problems such as upcoding and decomposing hospitalizations emerging in China’s Diagnosis-Related Group (DRG) reform, existing studies mostly attribute such issues to aspects like behavioral motivations, which fail to explain the root causes of the problems...

Heterostructure Engineering of FeS2–MoS2 with Encapsulated Architecture for Long-Term Stability and Fast Kinetics Sodium-Ion Battery Anodes

Abstract Conversion-type transition metal sulfides (TMSs), particularly pyrite-phase FeS2, are promising anodes due to their high theoretical capacity. However, their practical application is hindered by intrinsic drawbacks such as poor electrical conductivity, severe volume expa...

Copper Ion RemovalMethod and Engineering Dosing PredictionModel Based on Chlorella–Actinomycetes Symbiotic System

Abstract To address the lack of systematic ratio-screening logic and engineering decision-making basis in existing microalgae-bacteria symbiotic systems for heavy metal wastewater treatment, the biological removal systems were constructed using different ratios of Chlorella sp. a...

HeterostructureAssembly of Zn-Substituted Fe3O4@NC/CuS@MoS2 for Enhanced ElectrochemicalDetection of Organophosphorus Pesticide Residues

Abstract A hierarchical Zn-substituted Fe3O4@NC/CuS@MoS2 heterostructure was rationally designed for the electrochemical detection of organophosphorus pesticides such as methamidophos and dichlorvos. Hollow Fe2O3 nanospheres were synthesized hydrothermally, followed by Zn-substit...

Holistic Inside‐Out Reconfiguration of Ni‐Rich Cathodes via a Thermally Self‐Driven Strategy for Exceptional Chemomechanical Stability

ABSTRACT Ni‐rich layered oxides (LiNi x Co y Mn 1− x − y O 2 , x ≥ 0.8) are indispensable for high‐energy‐density lithium‐ion batteries, yet they suffer from severe chemomechanical degradation driven by the synergy of internal microcracking and interfacial parasitic side reaction...

Evidence for heavy iron isotopic enrichment at Earth’s core-mantle boundary

Ocean island basalts exhibit heavier and more variable iron isotopic compositions (δ56Fe) than mid-ocean ridge basalts, but the origin of these signatures remains unresolved. Here we investigate whether Fe-rich ultralow-velocity zones at the core-mantle boundary can provide a dee...

Achieving Synergistic Kinetics and Stability in Li‐Rich Mn‐Based Oxides via AlPO 4 ‐Assisted Multi‐Scale Regulation

ABSTRACT Realizing the full potential of Li‐rich Mn‐based oxides (LRMOs) is contingent upon overcoming the intrinsic conflict between sluggish anionic redox kinetics and structural instability. Conventional modification approaches often fail to harmonize kinetic enhancement with...

Time-domain analysis of fractional-order viscoelastic sandwich plates via shifted Legendre polynomial approach

The objective of this study is to investigate the dynamic characteristics of three-dimensional fractional-order viscoelastic sandwich plates. Based on the fractional Kelvin–Voigt constitutive relation, the governing equations involving the spatial variables $(x,y,z)$ and the temp...

FedBudget: A Budget-Aware Federated Learning Method for Communication-Constrained Distributed Data Mining

Federated learning enables collaborative data mining without centralizing raw data, but communication budgets remain a practical bottleneck in distributed deployment. Existing federated optimization methods mainly address statistical heterogeneity or aggregation stability, while...

Raman Signal Enhancement via High-Power Laser Excitation in a Near-Concentric Cavity for Gas Detection

Raman spectroscopy has emerged as a powerful tool for gas detection due to its label-free operation, molecular specificity, and multi-component analysis capabilities. However, its widespread application is hindered by limited sensitivity, particularly for trace gas analysis. To o...