Shandong Normal University

Ice Converts Phenols into Persistent Mineral-Bound Polymers

Abstract Freezing fundamentally alters how minerals transform dissolved phenols in cold environments. As water freezes, solutes are excluded from the crystal lattice and concentrated into microscopic pockets of unfrozen liquid, creating reaction conditions far more extreme than t...

One‐Pot Construction of Amine‐Linked Covalent Organic Frameworks via Photoredox‐Catalyzed Reductive Amination

ABSTRACT Photocatalytic synthesis, as a green and efficient approach to organic synthesis, has been widely adopted in various organic transformations; however, its application in the synthesis of covalent organic frameworks (COFs) remains in the early stages of development. Moreo...

Machine Learning-Assisted Key Toxicant Identification from Mass Spectra: A Case Study of AhR Agonists in Polypropylene Face Masks

Abstract Identifying key toxicants that drive biological effects in complex samples remains a major challenge for environmental analytical chemistry. Here, we developed an AhR-oriented machine-learning model, EIMSFrag-AhR, to predict AhR agonistic activity directly from GC-EI-MS...

Is the multilingual motivational self system a unified construct or an aggregation of language-specific selves?

With the acceleration of globalisation and the increasing prevalence of multilingual education, the traditional L2 Motivational Self System (L2MSS) has shown limitations in explaining the complex motivational configurations of multilingual learners. This study aims to examine the...

Artificial Intelligence Application, Corporate Carbon Performance and Sustainable Development: Evidence from Chinese Listed Firms

Based on 24,073 firm-year observations of Chinese A-share listed firms from 2009 to 2023, this paper investigates the effect of artificial intelligence (AI) application on corporate carbon performance, which is defined as operating revenue per unit of CO2 emissions and serves as...

Effects and social design features of physical activity interventions on loneliness and subjective well-being in older adults: a systematic review

Physical activity is promoted in later life, yet its capacity to reduce loneliness or improve subjective well-being remains uncertain when social contact is incidental rather than intentionally designed. This review synthesised controlled intervention evidence and examined how so...

Coherence‐Engineered Optical Knot and Link Arrays

ABSTRACT Optical knots and links provide intrinsically 3D topological degrees of freedom for structured light, offering opportunities for topological holography, optical storage, and multidimensional information encoding. However, extending isolated optical knots and links to sin...

Performance Analysis of Clustered Integrated Sensing and Communication Networks

Integrated sensing and communication (ISAC) provides a promising approach for IoT networks by combining data transmission with target sensing over shared hardware. Different from prior studies centered on the performance of ISAC networks with uniformly distributed nodes, this wor...

Inferring 1-Minimal Trigger Configurations for Assessing Linux Kernel CVE Triggerability

Vendors assessing Linux kernel CVEs need to know whether a bug is triggerable under production-tailored configurations, not merely whether a version is affected, yet upstream reproducers and vulnerability databases rarely provide configuration-level context. We study minimal trig...

Water-Enabled Conversion of NO and CO to NH3 over CuO x Clusters via Hydrolysis of Surface –NCO Intermediates

Abstract The catalytic conversion of gaseous NO to NH3 offers a promising dual-benefit strategy for environmental remediation and sustainable chemical synthesis. Herein, CuO/Al2O3 catalysts with varied CuO loadings (x wt %, xCu/Al) were developed for the possible NH3 production f...

Agricultural New Quality Productive Forces and Sustainable Rural Development: Spatial Spillovers, Income Distribution Effects, and Farmers’ Income Growth in China

Within China’s agricultural sector, agricultural new quality productive forces (ANQPFs) constitute an emerging productivity paradigm; however, further empirical testing is still needed to determine whether and through what mechanisms they affect rural economic sustainability. Pre...

Predicting student academic performance using TabPFN and SHAP: An interpretable machine learning approach

Predicting student academic performance is of significant importance for enabling timely educational interventions and improving educational outcomes in secondary education. However, existing predictive models in educational data mining often face the dual challenges of limited i...

Spatiotemporal Evolution and Quantitative Attribution of NDVI in the Lesser Khingan Mountains Considering Lag–Cumulative Effects

Boreal forest ecosystems across mid-to-high latitudes in the Northern Hemisphere show strong responses to climate change. Vegetation growth is influenced by cumulative climatic effects with time lags, as well as human disturbances. This study selects the Lesser Khingan Mountains...

On the implementation of the provisions concerning area-based management tools under the BBNJ Agreement

Abstract As one of the four core components of the Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas Beyond National Jurisdiction (BBNJ Agreement), area-based management tools (ABMTs...

Dual Flat Bands Enable Synergistic Excitation–Emission Enhancement in Rare-Earth Ions

Abstract Rare-earth ions are pivotal for integrated photonic light sources, but their low optical transition cross sections inherently limit pump absorption efficiency and spontaneous emission rates. Here, we overcome these drawbacks by designing a dielectric metasurface that sup...

The Adaptive Solution of High-Frequency Helmholtz Equations via Multi-Grade Deep Learning

Abstract The Helmholtz equation is fundamental for modeling wave propagation in acoustics, electromagnetics, and geophysics; however, high-frequency regimes remain notoriously difficult due to the severe numerical “pollution effect.” We propose FD-MGDL, an adaptive framework that...

Engineering a Hydrazone-Linked Covalent Organic Framework as a Cooperative Macromolecular Ligand for Recyclable Cu-Catalyzed Chan–Lam Coupling

Abstract The design of robust heterogeneous catalysts that rival the performance of homogeneous systems remains a fundamental challenge. Herein, we report a hydrazone-linked covalent organic framework (DHPy-COF) engineered as a cooperative macromolecular ligand with preorganized...

Flood shelter identification using a mechanics-based approach and triangular fuzzy analytical hierarchy process

Flood events continue to cause substantial damage to people, infrastructure and communities. Effective evacuation planning is essential, and the identification of safe shelters is a key element in protecting people and property. Shelter selection depends on a reliable flood risk...

Construction-Land Expansion and Economic Intensification Shape Land-Use Carbon Emissions in the Yellow River Basin Provinces

Land-use change affects regional carbon accounting through ecological conversion and the concentration of energy-intensive economic activity. We combined 30 m China Land Cover Dataset maps for 2010, 2015, 2020, and 2025 with provincial socioeconomic and energy statistics to quant...

Oxytocin modulates white matter functional connectivity tensor dynamics and circuit-targeted reconfiguration in depressive symptoms

Major depressive disorder involves disrupted neural circuit dynamics. While oxytocin has demonstrated modulatory effects on functional connectivity, its therapeutic potential for depression, particularly through white matter circuit modulation, remains poorly understood. Here we...