Northwestern Polytechnical University

Optimal Tariffs with Partial Cross-Ownership in a Vertical Market: Uniform Versus Discriminatory Tariffs

Abstract This paper investigates the welfare impact of discriminatory tariffs and uniform tariffs in the presence of vertical cross-ownership. We develop a four-country three-firm model, where the upstream firm and two downstream firms with asymmetry are located in different coun...

Independent Amplitude‐Phase Control in Liquid Crystal for Near‐Field Anti‐Counterfeiting and Far‐Field Holographic Encryption

ABSTRACT Liquid crystal (LC) optical devices provide a promising platform for optical encryption and anti‐counterfeiting applications. However, conventional design paradigms for LC light‐field modulation often involve coupled amplitude and phase responses, limiting design flexibi...

Unlocking High‐Performance Te‐Free p‐Type Thermoelectrics via Cu Doping in Entropy‐Engineered Cd 0.5 Zn 0.5 Sb Zintl

ABSTRACT Zintl phases are crucial for Te‐free power generation and electrical cooling modules, which are considered next‐generation thermoelectric (TE) technology. While n‐type Zintl materials, such as Mg 3 Sb 2 , have achieved remarkable performance, their p‐type counterparts ar...

Unlocking High‐Performance Te‐Free p‐Type Thermoelectrics via Cu Doping in Entropy‐Engineered Cd 0.5 Zn 0.5 Sb Zintl

ABSTRACT Zintl phases are crucial for Te‐free power generation and electrical cooling modules, which are considered next‐generation thermoelectric (TE) technology. While n‐type Zintl materials, such as Mg 3 Sb 2 , have achieved remarkable performance, their p‐type counterparts ar...

Crystallization and solidification of scalable metal halide perovskite films for photovoltaics

Abstract Metal halide perovskite photovoltaics have emerged as promising next-generation solar technologies owing to their high efficiency and compatibility with low-temperature manufacturing. Although small-area perovskite solar cells have achieved certified efficiencies around...

Molecular dynamics study of high-temperature creep in carbon-rich amorphous silicon carbide: The role of local coordination

The high-temperature creep resistance of polymer-derived carbon-rich amorphous silicon carbide (a-SiC) is critical for its application in extreme environments; however, the atomistic origins of its viscoplastic flow remain debated. In this study, molecular dynamics simulations co...

Dynamic Performance Improvement and Fatigue Mitigation of Strengthened Box Girder Bridges With External Posttensioned Tendons: Modeling and Strategies

ABSTRACT This study evaluates the dynamic and fatigue performance of high‐speed railway (HSR) box girder bridges strengthened with external posttensioned tendons, using validated three‐dimensional finite element models and a fracture energy‐based fatigue model that integrates ext...

Numerical analysis of flow resistance and heat transfer in double wall configurations featuring solid and hollow pin-fins

With the aim of overcoming the inherent penalties of high flow resistance and limited heat transfer associated with conventional solid pin-fin double wall designs (DW-SPF), this study introduces a novel hollow pin-fin configuration (DW-HPF). A comparative analysis of the two conf...

DeMa: dual-path delay-aware Mamba for efficient multivariate time series analysis

Abstract Accurate and efficient multivariate time series (MTS) analysis is increasingly critical for a wide range of intelligent applications, including traffic forecasting, anomaly detection for industrial maintenance, and trajectory classification for health monitoring. Within...

Confined Cascade Reconstruction of Mn 3 O 4 Microstructures for High‐Rate and Ultralong‐Life Energy Storage

ABSTRACT MnO 2 has garnered attention for pseudocapacitive energy storage owing to its high theoretical capacitance and tunable microstructures; however, its application remains severely constrained by the inherent trade‐off between activity and stability. Here, taking Mn 3 O 4 a...

FEM-ANN-GNN modeling of MHD Darcy–Forchheimer Boger nanofluid flow with coupled heat–mass transfer in a Y-shaped hourglass cavity

Purpose This study aims to numerically investigate steady two-dimensional MHD Darcy–Forchheimer mixed convection flow of a Boger nanofluid (Cu/H2O) with coupled heat and mass transfer inside a Y-shaped hourglass cavity containing a cylindrical obstacle, incorporating thermal radi...

Optimized microwave pretreatment and ultrasound-assisted deep eutectic solvent extraction for efficient valorization of Citrus paradisi peel bioactives

Abstract This study presents a sustainable approach for recovering bioactive compounds from grapefruit ( Citrus paradisi ) peel using a glycerol–glucose-based deep eutectic solvent as a green extraction medium. Spectroscopic characterization confirmed the formation of stable hydr...

Research and application of variable-thickness thin-layer element method

A variable-thickness thin-layer element (VTE) method is proposed to address the challenges in parameter determination and the limited computational accuracy of the conventional thin-layer element (TE) method. Underpinned by the fundamental assumption of a Gaussian random distribu...

Supercritical autoignition of methane in an ultra-high-pressure rapid compression machine at up to 160 bar: real-fluid effects and two-stage ignition behavior

Although methane autoignition under ultra-high-pressure and supercritical conditions is highly relevant to advanced high-pressure combustion systems, such conditions have rarely been studied in RCMs. In this work, supercritical methane ignition is investigated in a newly establis...

Hierarchical Sparse-Routing-Enabled Mamba Scanning for Tire Pattern Recognition

To tackle the challenging representation problem of fine-grained tire tread patterns, we present a hierarchical sparse-routing-enabled multi-mode multi-directional Mamba (HSR-Mamba) scanning framework for tire pattern recognition to improve performance, and it mainly consists of...

When Vision Deceives: The Compensatory Role of Passive Haptics in Mitigating Sim2Real Gap During Teleoperation Assembly

In model-mediated teleoperation (MMT), network latency and sensor drift often cause discrepancies between visual rendering and actual physical states (the Sim2Real gap), compromising safety and increasing cognitive load. To investigate the compensatory role of kinesthetic feedbac...

Multi-scale investigation of cooling characteristics and structural arrangement effects in octahedral transpiration cooling structures

The internal heat transfer mechanism of periodically arranged transpiration cooling structures remains unclear. In this study, the differences in simulation results between the pore-scale method and volume-averaged method are firstly compared. After determining the appropriate si...

Meter-depth and multi-polarization addressable zoom 3D meta-holography

Propelled by rapid advances in nanofabrication, meta-holography has become a frontier hot spot in optics. 3D meta-holography, in particular the large depth and multi-polarization addressable ones, with extraordinary expansion of the control dimension and information capacity, off...

Safety-Guaranteed Go-Around Decision Framework Based on Funnel for Automatic Carrier Landing Systems

Existing go-around decision methods for Automatic Carrier Landing Systems (ACLSs) are mainly based on altitude deviation. The safe region implied by these methods is therefore effectively single-dimensional, which can lead to overly conservative and incomplete go-around decisions...

Upconversion edge imaging using single-beam second-harmonic generation

Near-infrared (NIR) imaging is essential for biological and materials sensing, yet high-performance NIR detectors are often cost-prohibitive and plagued by high dark current. Nonlinear frequency upconversion offers a compelling solution by shifting NIR signals into the visible sp...