Northwestern Polytechnical University

CLCAD: Cross-Layer Collaborative Anomaly Detection for Continuous-Flow Microfluidic Biochips

Continuous-flow microfluidic biochips are widely used in biochemical applications because of their precise control, high integration, and automation. During bioassay execution, the control layer applies pneumatic signals to valves according to the valve activation sequence, ensur...

WAGRL: A Wind Adaptive Guidance Framework for Uncertainty-Aware UAV Trajectory Control

To address the challenges of wind-induced uncertainty, decision inconsistency, and safety risks in quadrotor trajectory tracking, this study presents a Wind Adaptive Guidance Reinforcement Learning (WAGRL) framework. Unlike conventional controllers relying on fixed aerodynamic mo...

Efficient Cascade Abiotic Synthesis of Sugar From CO 2

ABSTRACT The capability of producing sugar compounds from carbon dioxide (CO 2 ), ideally based on abiotic systems, suggests an artificial, scalable strategy to provide potential solutions for both food and environmental issues. In this work, we report an inorganic, abiotic pathw...

Hygrothermal Aging and Strength Prediction of CFRP Single-Lap Joints: Experiments and Physics-Constrained Neural Networks

Adhesively bonded carbon-fiber-reinforced polymer (CFRP) joints offer efficient load transfer and weight-saving potential in aerospace structures. The simple geometry of single-lap joints (SLJs) makes them useful for examining bond durability, although the effects of hygrothermal...

Two-Scale Exponential Integrators with Uniform Accuracy for Three-Dimensional Charged-Particle Dynamics Under a Strong Magnetic Field

Abstract. The numerical simulation of three-dimensional charged-particle dynamics (CPD) under a strong magnetic field is a basic and challenging algorithmic task in plasma physics. In this paper, we introduce a new methodology to design two-scale exponential integrators for three...

Research on hydrodynamic performance and flow characteristics of a multi-stage pump-jet propulsor

Pump-jet propulsor is widely used in underwater vehicles. Recently, multi-stage pump-jet configurations have garnered significant attention due to their superior thrust and vibration performance. This study investigates the Stator-Rotor-Stator Pump-Jet Propulsor (SRS-PJP), focusi...

An Innovated Searching for Initiating Hubei &Fujian Provinces Cities' GDP Status &its Estimation Sustainably I

The secondary industry will present the main occupation to maintain and promote the whole GDP(gross domestic product) as an important support included the steel making̖ mechanical construction & electrical and electronic device in a whole one that exhibits comprehensive combinati...

FMFNet: Frequency-Aware multi-scale attention with fine-grained feature fusion for sonar image semantic segmentation

Sonar image semantic segmentation is a challenging task due to low contrast, severe speckle noise, and blurred object boundaries, which constrain the representation capability of purely spatial-domain convolutional features. This paper proposes FMFNet (Frequency-Aware Multi-Scale...

Antibacterial and Biocompatible Iodine-Releasing Polycationic Coatings Synthesized by Solvent-Free Initiated Chemical Vapor Deposition

Abstract Bacterial adhesion to surfaces of medical devices may cause medical device-associated infections. This challenge can be addressed by surface modification utilizing antibacterial coatings. Polycationic coatings possess excellent antibacterial activity, but their biocompat...

Tuning the pressure exponent for adaptive solid rocket motors via molecular perovskite energetic materials: a comparative evaluation of DAP-4 and HMX-based propellant

Conventional nitramine energetic ingredients (e.g., HMX) suffer from complex tuning methods and limited effectiveness in regulating the high-pressure exponent of solid propellants. In this study, the molecular perovskite energetic material DAP-4 was employed to achieve a stepwise...

Decoupled Multiplicative Physics-Guided Neural Network for Extrapolative Modeling of GaN HEMT

Rapid direct-current (DC) surrogate modeling of gallium nitride (GaN) high-electron-mobility transistors (HEMTs) requires accurate prediction of the current-capability, conduction-loss, and self-heating indicators used in geometry screening. This work presents an electrothermal d...

Polarization Properties Orientation Coupling Regulates Molecular Packing and Device Performance Beyond Dipole Moment Strength in Organic Solar Cells

ABSTRACT Strong interactions between large dipole moment additives and host materials have been widely used to modulate molecular packing in organic solar cells (OSCs), while most studies focuses on dipole moment magnitude instead of the polarization properties orientation. Here,...

Mechanochemical Engineered Sulfur Copolymers Onto Group 13 and Related Fillers Through Lewis Acid‐Base Pairing

ABSTRACT Group 13 and related fillers are cornerstone components for advanced composites, yet their severe interfacial incompatibility with organic matrices inherently limits their practical efficacy. Conventional surface modification strategies remain fundamentally constrained b...

Chloride-blocking MnOx/NiFe architectures enabling robust oxygen evolution in alkaline seawater

Seawater electrolysis offers a promising route to green hydrogen but is hindered by chloride-induced electrode corrosion and parasitic chlorine evolution. Herein, a chloride-blocking MnO x -coated NiFe layered-double-hydroxide nanosheet array on carbon cloth (MnO x /NiFe@CC) is d...

Diffuse-interface lattice Boltzmann simulation of nanofluid cooling for advanced battery thermal management

A diffuse-interface lattice Boltzmann model (DI-LBM) is developed for cylindrical lithium-ion battery packs cooled by Al 2 O 3 / H 2 O nanofluids. A double distribution function (DDF) solves the flow and the temperature together on a uniform Cartesian grid, so heat passes correct...

Managing Mission Risk Through Performance‐Based Mission Processing Rate and Abort Decisions

ABSTRACT Performance‐based tasks are widely adopted in complex engineering projects, where service contracts impose explicit performance benchmarks alongside potential financial losses triggered by system breakdown. Balancing contractual rewards, penalties, and inherent failure r...

Polymer-derived SiOC ceramic composites with surface-tuned ZrB 2 for broadband electromagnetic wave absorption

The demanding operational environments of advanced aerospace vehicles urgently require electromagnetic wave (EMW) absorbing materials that simultaneously possess broad bandwidth and exceptional high-temperature stability. ZrB 2 exhibits great potential as an EMW absorber due to i...

A study on lubrication characteristics of contaminated oil film and abrasive wear in fuel gear pumps based on discrete element method

Aviation fuel gear pumps are prone to accelerated wear of friction pairs during long-term high-load operation, generating metallic particles that contaminate the sliding bearing oil film and trigger abrasive wear. To address this, a coupling solution of the discrete element metho...

Wing Icing Segmentation from UAV Flight-Test Images Using Wing Surface Spatial Priors and Inter-Frame Smoothing

Wing icing alters the aerodynamic shape of lifting surfaces and threatens aviation safety. Existing icing-image datasets come mainly from wind tunnels or simulations, and image-level random splits overestimate generalisation for video data. We build a real UAV flight-test dataset...

Do government subsidy policies promote the energy transition resilience of enterprises? Empirical evidence from China

Purpose Energy transition resilience (ETR) captures enterprises’ capacity to maintain sustainability during low-carbon transitions. This paper aims to construct a comprehensive ETR evaluation index system and examines how government subsidies affect enterprises’ ETR. Design/metho...