Northwest Normal University

A SIMPLIFIED ITERATIVE ALGORITHM WITH RELAXATION FACTOR FOR SOLVING AN ANNULAR INVERSE ELECTROCARDIOGRAPHY PROBLEM

This paper presents a simplified iterative algorithm with a relaxation factor for solving the Cauchy problem of Laplace equation in an annular domain, with applications to inverse electrocardiography. Building upon the classical Kozlov-Maz’ya iterative framework, we introduce a n...

Associations Among Perceived Teacher and Peer Emotions, Learners’ Own Emotions, and Engagement in Online English Learning

Emotion is integral to foreign language classrooms. Although recent research has expanded beyond learners to consider teachers and peers, these sources of classroom emotions have often been examined separately. Consequently, the associations among students’ perceptions of teacher...

Organic acid-regulated self-assembly and anti-oxidation of low-defect Sn-Pb perovskite nanocrystals toward optical anti-counterfeiting applications

Tin-lead mixed perovskite nanocrystals (NCs) attract extensive research interest for narrow bandgap and low toxicity, yet inherent surface defects, weak crystallinity and easy Sn 2+ oxidation severely degrade their stability and usability. This work adopts four organic acids (FA,...

Mo15S19/NiS/FeS/Nickel Foam Nanostructured Electrocatalyst for Water Electrolysis

Abstract The development of efficient and low-cost non-noble metal electrocatalysts is crucial for advancing hydrogen production via water electrolysis. Herein, a non-noble metal multi-level heterostructured bifunctional electrocatalyst, Mo15S19/NiS/FeS with typical nanosheet mor...

How Generative AI-Assisted Formative Feedback Is Appraised and Implemented in Online Collaborative Learning

Effective educational feedback is vital for enhancing student learning, yet providing personalized formative feedback in large-class settings remains challenging. Generative Artificial Intelligence (GAI) offers a potential means of scaling formative feedback. Guided by a self-det...

Confined Phase Transition Infiltration Coupled With In Situ Pore Sealing: Constructing Hard Carbon Rich in Closed Pore for Plateau‐Capacity‐Dominated Sodium Storage

Biomass‐derived hard carbon (HC) is a promising candidate for anode materials in sodium‐ion batteries (SIBs). However, abundant open pores generated during activation process often lead to severe proliferation of the solid electrolyte interphase (SEI) and irreversible Na + consum...

The influence of vapor pressure deficit changes on global terrestrial evapotranspiration

Abstract. Vapor pressure deficit (VPD) is increasingly recognized as the primary driver of uncertainty in future global evapotranspiration (E) trends. Accurately characterizing the spatiotemporal dynamics of VPD and clarifying its mechanisms of influence on terrestrial E are cruc...

Electrochemiluminescence shunt via bi-based co-reaction accelerator for the identification of pentanol isomers

Pentanol represents an attractive clean-burning biofuel, yet fuel commonly contain multiple structurally similar pentanol isomers that perturb the flash-point and impair combustion performance, necessitating the differentiated identification of pentanol isomers. Herein, we propos...

Surface and interface engineering of SnO2-based electron transport layers for high-performance and flexible perovskite solar cells

Perovskite solar cells (PSCs) have emerged as a leading photovoltaic (PV) technology, achieving rapid progress in power conversion efficiency (PCE) and promising prospects for scalable, flexible applications. Within these devices, the electron transport layer (ETL) plays a decisi...

Manganese-Doped Fe3S4/Mo3S4 Nanoparticles on Nickel Foam as Durable Electrocatalysts for Water Electrolysis

Abstract Developing highly efficient, durable, and low-cost non-precious-metal bifunctional electrocatalysts is essential for sustainable water electrolysis. Herein, Mn-incorporated Fe3S4/Mo3S4 heterostructured nanoparticles were constructed in situ on nickel foam (NF) through a...

Resource utilization and phenological dynamics in underground-aboveground parts of Rheum tanguticum via metabolomics and microbiomics

Abstract Rhubarb, a globally important perennial herb, possesses considerable pharmaceutical and food potential. Using Rheum tanguticum as plant material, this study systematically profiled the metabolomic and endophytic communities of its roots, petioles, and leaves across diffe...

Photo-Induced Three-Component Radical Trifluoromethylation/Heteroarylation of Alkenes via EDA Complexes

Abstract This study develops a visible-light-induced electron donor–acceptor (EDA) complex strategy, employing the inexpensive and readily available DBU as the electron donor and the industrially available CF3Br as the trifluoromethyl source, to achieve the trifluoromethylation/h...

Optimal investment strategy of DC pension plans for uncertain systems with jump under Hurwicz criterion

This paper establishes a new optimal control model for a jump-discontinuous uncertain system within the framework of uncertainty theory. It investigates the optimal investment strategy for a DC pension plan subject to uncertain wages and inflation risks, using the Hurwicz weighte...

A Bench-Stable Platform [TBA][PS2Cl2] Enables Sequential Assembly of Unsymmetric Tri- and Tetrathiophosphates

Abstract Unsymmetric tri- and tetrathiophosphates with distinct S-substituents are synthetically challenging. Here, we report a bench-stable P(V)–S platform, tetrabutylammonium dichlorodithiophosphorane ([TBA][PS2Cl2]), prepared by mild redox-neutral halogenation of commercial P4...

Unpaired mural-baimiao generation via gradient-frequency decoupling and structure-guided synergistic attention

Severe weathering and physical deterioration often cause line fading, pigment flaking, and strong edge interference in mural images, making unpaired baimiao generation prone to structural discontinuities, line adhesion, and semantic distortion. To address these problems, we propo...

Spatially Constrained Grassland Aboveground Biomass Estimation by Identifying and Masking Achnatherum splendens: Integrating UAV Remote Sensing and Deep Learning

Accurate estimation of forage aboveground biomass (AGB) from unmanned aerial vehicle (UAV) imagery is essential for monitoring alpine grassland productivity and supporting sustainable grassland management. However, the biomass of non-palatable species may be included in remote se...

TsCl-Mediated, Copper-Catalyzed Deoxygenative Difluoromethoxylation Reaction of Quinoline- N -Oxides

Abstract Quinoline derivatives have played a pivotal role in the design and synthesis of drug-active substances and bioactive molecules for a long time. Herein, a TsCl-mediated, copper-catalyzed deoxygenative difluoromethoxylation reaction that facilitates the synthesis of 2-difl...

The neglected minority: perceived student engagement, teacher emotions, and well-being among male english teachers

Abstract Background Teacher well-being is closely connected to teachers’ classroom experiences, yet limited research has examined how perceived student engagement and discrete teacher emotions are associated with the well-being of novice male English teachers. This study therefor...

Central facial emotion accelerates automatic processing of multiple facial expressions: An EEG study

Automatic processing of multiple facial expressions (MFE) is essential for adaptive social interactions, enabling the rapid detection of emotional cues in complex social environments. Behavioral studies have shown that, during explicit judgments of overall emotion, faces in the c...

Graphitic Carbon Nitride‐Based Composites for Advanced Thermal Management: From Passive Fillers to Active Multifunctional Platforms

Advanced thermal management increasingly requires materials capable of not only dissipating heat but also regulating, converting, and storing thermal energy. Graphitic carbon nitride (g‐C 3 N 4 ), a two‐dimensional polymeric semiconductor, has emerged as a promising platform for...