Chang'an University

Digital Economy Participation and Farm Expansion: Evidence from Farmland Rental Market Entry and Operated Farmland Area in China’s Major Grain-Producing Areas

Using survey data from 1025 farm households in Anhui, Henan, Hebei, and Shandong Provinces, this study examines whether farmers’ participation in digitally enabled agricultural activities is associated with farm expansion in China’s major grain-producing areas. Digital economy pa...

Rheological Properties and Anti-Icing Performance of Asphalt Modified with Hydrophobic and Salt-Storage Components

Hydrophobic and salt-storage functionalization can impart anti-icing capability to asphalt, but the associated changes in rheological behavior should be evaluated concurrently. In this study, silica aerogel and potassium acetate-loaded diatomite were incorporated as hydrophobic a...

Superior flexibility merges high power density in single-crystal Bi2Te3 film thermoelectric generators

Developing high-performance, mechanically robust power sources is critical for wearable microelectronic networks. Flexible thermoelectric technology offers a promising solution, but the central challenge remains the synergistic optimization of mechanical flexibility and functiona...

A Data-Driven Framework for Planetary Winch Reducer Noise Prediction via Feature Selection and Residual Compensation

Accurate reducer noise prediction is essential for condition monitoring and predictive maintenance of mechanical transmission systems. However, the strong nonlinear coupling between operating conditions and noise responses, together with measurement uncertainties, remains a major...

Simulation-Based Multi-Scenario Assessment of Comprehensive Ecological Risk and Resilience: A Case Study of the Pearl River Delta

Under climate change, the demand for high-quality urban ecological security is rising. This study focuses on how rapid urbanization and climate change affect ecological risk, resilience, and land use functions (LUFs) spatial co-variation in the Pearl River Delta. Land use was sim...

MAC1toK: relax feature matching with maximal cliques for 3D registration

Abstract The majority of existing point cloud registration (PCR) methods exhibit performance degradation under extremely low inlier ratios. To address this limitation, this paper presents a robust learning-free estimator called MAC1to K , which relaxes the feature matching with m...

Elevational Patterns of Avian Community Diversity in the Daba Mountains and Their Underlying Drivers

Mountain ecosystems serve as natural laboratories for studying biodiversity distribution along elevational gradients. This study was conducted at Hualongshan National Nature Reserve in the Daba Mountains, Shaanxi Province, using line transect surveys, mist-netting, and passive ac...

Multi-Objective Capacity Configuration Optimization of an Off-Grid Highway Microgrid Considering Different Energy Storage Structures

To meet the off-grid operation demand of highway facilities, this study proposes a capacity configuration optimization method for an off-grid highway microgrid. First, based on the monthly electricity consumption data of tunnels, toll stations, service areas, and electric vehicle...

From Availability to Quality: Diagnosing Encounterability and Perceptual Affordance of the Built Environment in Xi’an’s Old City

As urban development in China shifts toward improving existing areas, the focus of evaluation is moving from availability to quality, yet assessments of the neighborhood built environment and living circles still stop at facility provision. This study decomposes the conversion fr...

Optimization of a Highway Tunnel Bottom Structure in Three-Layer Upper-Soft and Lower-Hard Composite Ground Using Physical and Numerical Models

Tunnel excavation in ground comprising a soft upper stratum and a hard lower stratum posed significant challenges, particularly during invert construction using drilling-and-blasting methods, which could disturb the surrounding rock and the installed support system. To address th...

Characterization of the Topological Structure of the Asphalt Mixture Skeleton Main Force Chain Based on the Complex Network Theory and Discrete Element Method

Abstract The main force chain (MFC) serves as an important tool for analyzing the effective load transfer capacity within the skeleton of asphalt mixture. However, existing studies have not adequately considered the interactions among different MFCs, meaning that the effective tr...

Methods for evaluating the seismic isolation performance of foam concrete shock-absorbing layers in mountain tunnels in high-seismic-intensity areas

Abstract Currently, a large number of post-earthquake surveys and statistical analyses of tunnel damage indicate that tunnels built against mountainsides are subject to the coupled effects of “asymmetric loads and seismic cyclic action,” which increase the risk of earthquake-indu...

Reaction-sequence-regulated Y2O3/t-ZrO2 coherent interfaces enable Y diffusion and YSTZ toughening in ceramic coatings on AZ91D magnesium alloy

As a prototypical structural metallic material, AZ91D magnesium alloy is widely used in aerospace and automotive applications due to its low density and high specific strength, but its poor surface durability remains a critical limitation. To enhance service reliability, ceramic...

Tiered diagnosis and value-based healthcare: can the outpatient reimbursement policy for medical costs in retail pharmacies promote both?

Amid growing health demands and tight welfare budgets, guiding rational healthcare-seeking behavior to improve health while controlling costs has become a global challenge. This study aims to examine whether the reform of medical insurance on the cost-sharing of pharmacy can prom...

Characterization and molecular dynamics of interfacial adhesion in hydrogenated styrene/polyurethane prepolymer composite-modified asphalt

To address the limitations of conventional polymer modified asphalt, a hydrogenated styrene block polyurethane prepolymer (M-PPU) modified asphalt was developed by incorporating a hydrogenated styrene block into a polyurethane prepolymer (PPU). The preparation process was first o...

Continuous automatic batch identification and characteristic analysis of vortex-induced vibrations of stay cables based on long-term monitoring

Vortex-induced vibration (VIV) is a typical abnormal vibration of stay cables, and long-term monitoring of VIV with in-depth information extraction is critical for bridge safety and maintenance. This study establishes an automatic batch framework for continuous VIV identification...

Mechanism Analysis and Prevention of Road Damage in High-Latitude Permafrost Regions

Abstract Frost heave and thaw settlement occur widely in northern China. Environmental change has increased their occurrence. High-latitude permafrost regions have high temperature sensitivity, experience freeze–thaw settlement, and exhibit unique rheological properties. Multiple...

Nanoplate-AssembledYb/Er-BiOBr Microspheres for DurableSelf-Cleaning Photocatalytic Coatings

Abstract This study addresses the efficient and safe purification of low-concentration atmospheric NO. A Yb/Er-codoped nanostructured BiOBr was synthesized via a solvothermal method, and a composite superhydrophobic coating (FSBE) was fabricated by a layer-by-layer spraying strat...

Latent profiles of instrumental and relational generative AI engagement among university students

This study examines how university students engage with generative AI (GenAI) across instrumental and relational domains using two independent, domain-specific exploratory surveys of Chinese university students (Study 1: N = 517; Study 2: N = 508). Study 1 assessed instrumental i...

Proactive traffic conflict prediction: uncovering multi-dimensional risk mechanisms through spatiotemporal heterogeneity

Objective Proactive traffic conflict prediction often relies on average-state macroscopic variables (e.g., mean speed, flow, density), which can obscure the underlying traffic flow instability and microscopic heterogeneity that precipitate critical interactions. The objective of...