North University of China

Multi-Sensor Dictionary Fusion-Driven Sparse Representation Classification Method for Gearbox Fault Diagnosis

As a powerful tool for sparse signal representation, dictionary learning has gained traction in data-driven fault diagnosis. However, noise interference exists in actual industrial environments; noise as a common feature across all classes inevitably covers discriminative feature...

Mathematics-driven state monitoring and tampering defense for a hierarchical heterogeneous UAV swarm communication system

State monitoring and data integrity are essential for unmanned aerial vehicle (UAV) swarm communication systems in low-altitude remote auto-operation systems (LA-RAOSs). This study proposes a mathematics-driven hierarchical heterogeneous network (MD-HHNet) framework for state mon...

Adaptive Integrated Microfluidic System with Real-Time Dielectric Feedback for Deterministic Micro-Manipulation

Abstract Conventional microfluidic particle sorting systems predominantly rely on static, open-loop operational principles, rendering them highly vulnerable to performance deterioration induced by cellular phenotypic heterogeneity and localized hydrodynamic fluctuations. Here, we...

Muscle synergy characteristics during hands-and-knees crawling in children aged 4–6 years

Hands-and-knees crawling requires complex multi-joint coordination, managed by the central nervous system (CNS) via muscle synergies. While infant crawling is well-studied, neuromotor control in 4–6-year-olds remains under-investigated. This study examined the spatiotemporal cons...

Preparation of ultrafine FOX-7 using high-pressure microfluidization technology and study on its properties

To regulate the particle size and improve the morphology of FOX-7, high-pressure microfluidization technology was employed for refinement. The effects of key processing parameters, including jet pressure, processing cycles, the mass ratio of FOX-7 to liquid medium, and liquid med...

Decoupling Dark Current and Photogain in Silicon-Based Graphene Architecture for Multidimensional Photodetection

Abstract Silicon-graphene architecture holds significant promise in the field of wafer-level process-compatible and high-performance optoelectronic device development. Despite the fact that graphene exhibits ultrabroadband absorption, silicon-based graphene photodetectors general...

Experimental and simulation investigations of combustion and explosion properties of isopropyl nitrate at different concentrations

To reveal the explosion hazard properties and combustion mechanism of isopropyl nitrate (IPN), a 20 L spherical explosion device was used to conduct macroscopic explosion property tests, and ReaxFF MD simulations were employed to analyze the microscopic reaction mechanisms. The f...

Detection of Personal Privacy Information in Social Data Taking Into Account Data Augmentation and Mask R‐ CNN

ABSTRACT Visual privacy‐sensitive objects in social images are often small, partially occluded, and unevenly represented in available training data, which limits the reliability of automatic privacy detection. This study develops a privacy‐sensitive object detection framework com...

Broadband wearable acoustic sensing for continuous cardiopulmonary monitoring

The human body continuously generates weak, broadband acoustic-mechanical signals that encode rich cardiopulmonary information, yet their reliable capture in real-world settings remains constrained by motion artifacts, limited bandwidth, and suboptimal mechanical coupling. Here,...

Design and Implementation of an MPSoC-Based IMU/GNSS/Polarization Integrated Navigation System

To address the insufficient heading constraint of integrated navigation systems under GNSS-denied conditions and the high computational burden of high-resolution polarization-image processing, an IMU/GNSS/sky-polarization integrated navigation system based on a Zynq UltraScale+ M...

One-pot synthesis of edge-rich Ni3S2/MoS2 heterojunction for superior overall water splitting

Bifunctional electrocatalysts with outstanding catalytic capability toward both the Oxygen Evolution Reaction (OER) and Hydrogen Evolution Reaction (HER) have become a prevailing research hotspot in water electrolysis for hydrogen generation. Herein, Ni 3 S 2 /MoS 2 heterojunctio...

Relaxation Piezoionic Hydrogel for Self-Powered, Self-Decoupled Monitoring of Finger Rehabilitation

Abstract Hand motor dysfunction involves limited finger flexion and impaired release control, making finger flexion angles and active relaxation ability key metrics for rehabilitation assessment. However, existing flexible electronics quantify deformation amplitude, while deforma...

Stochastic Analysis and Stability of Diabetic Population Dynamics

Modeling diabetic illness with random perturbations is the goal of this work. The proposed model consists of three classes: the pre-diabetic population, the diabetic population with complications, and the diabetic population without complications. We examined the suggested proble...

VMD Optimization Using a Logistic-Map-Enhanced BTO Algorithm and a Dual-Head Attention LSTM for Magnetocardiography Signals Denoising

Magnetocardiography (MCG) is highly susceptible to noise during acquisition, which significantly limits its clinical utility for the assessment of Coronary Artery Disease (CAD). Traditional model-driven and data-driven denoising methods often suffer from manual parameter tuning,...

Axial behavior of steel tubes strengthened with outer steel tube–concrete jackets

Hollow steel tube (HST) columns are widely used in engineering structures due to their high load-carrying efficiency and excellent ductility. However, strengthening is often required when functional upgrading is needed or when load demands increase. This study investigates the ax...

Mechanism of the influence of solids holdup on the heat transfer rate of high-density particle flows in cyclone pyrolyzer

Introducing centrifugal force into a free-fall downer (FFD) creates a cyclone pyrolyzer (CP), which can achieve a synergistic effect of high gas velocity and localized high solids holdup (>0.1) to enhance heat transfer in high-density particle flows. However, the mechanism of int...

Synthesis of lanthanide metal M-doped Ni3S2-based (M = La, Nb and Nd) materials and performance testing of electrolyzed seawater and urea

H 2 production through electrochemistry seawater splitting has caused much attention due to the fact that it does not consume precious freshwater resources. However, its industrial application is hindered by the slow dynamics of the anode water oxidation reaction and the corrosio...

Process-window and morphology prediction in laser-induced forward transfer of high-viscosity silver paste

Laser-induced forward transfer (LIFT) is a promising non-contact technique for transferring high-viscosity silver paste onto silicon wafers for photovoltaic metallization. To predict the stable transfer window and line morphology, a semi-empirical process-window model was establi...

Semantic-Guided Enhanced UIU-Net for Infrared Small Target Detection

Infrared small-target detection is commonly implemented as binary pixel-level segmentation and localization but remains challenging because targets occupy very few pixels and are embedded in complex backgrounds. This paper develops the Semantic-Guided Enhanced UIU-Net (SGUIU-Net)...

Comparison study of the total sugar, amino acids, Maillard reaction products and volatile compounds of Huangjiu from Shaoxing and Daixian in China

Abstract BACKGROUND The Huangjiu (Chinese rice wine) is one of the most culturally important alcoholic beverages in China, with the varieties from Southern Shaoxing and Northern Daizhou being particularly renowned. The raw materials and production processes of Huangjiu from these...