Hohai University

Fixed-time adaptive sliding mode control for nonlinear systems based on rapid Kolmogorov-Arnold network

This paper proposes a fixed-time adaptive sliding mode control method for second-order uncertain nonlinear systems. The proposed controller combines fixed-time nonsingular terminal sliding mode control (FTNSTSMC) with a rapid Kolmogorov-Arnold network (RKAN). Unlike finite-time c...

High-resolution land cover mapping from coarse labels via a noisy label learning-guided cross-scale framework

High-resolution remote sensing images (HRSIs) provide essential data support for land cover mapping, where deep learning has shown great promise. However, deep learning-based methods rely on abundant high-quality annotations, while low-resolution coarse labels are difficult to us...

An adaptive method for land cover service composition based on service network

With the rapid advancement of emerging Internet technologies, the number and diversity of land cover services have increased substantially, leading to the development of an open land cover service ecosystem. Consequently, the automated orchestration of fine-grained services to co...

Trace Element Bioavailability Shapes Bacterial Communities and Biological Nitrogen Fixation in Paddy Soils

Biological nitrogen fixation (BNF) is a key nitrogen source in paddy soils, yet its spatial variability remains poorly understood. In this study, we conducted a 90-day 15N2 labeling experiment using soils from seven paddy fields in Zhejiang Province, China, to quantify total nitr...

Managerial Buffering and the Sustainability Paradox: How Intermediary Organizations Shape the Social Sustainability of Platform Labor

Digital labor platforms have expanded employment in urban service work while shifting much of the operational and occupational risk of that work onto workers. Whether such employment can support decent work—the central labor commitment of SDG 8—remains unresolved. Algorithmic dis...

Fused Triphenylamine‐Terminated Self‐Assembled Hole‐Transporting Monolayers for Perovskite Solar Cells

ABSTRACT Conventional self‐assembled hole‐transporting monolayers (SAMs) in perovskite solar cells (PSCs) suffer molecular aggregation, uneven coverage on rough FTO substrates, and insufficient interfacial defect passivation. The design and application of novel SAMs have become a...

Scour reduction performance of multi-layer collars around a cylindrical monopile

Local scour around offshore wind monopiles can reduce foundation embedment and threaten long-term structural performance. This study experimentally investigates single-, double-, and triple-layer collar systems under steady clear-water currents, with emphasis on the effects of co...

Divorced eutectic growth of hypereutectic Al-Si alloy in sand casting and its influence on mechanical and thermal properties

In order to receive the divorced eutectic growth in Al-Si system like in Fe-G (graphite), the divorced eutectic growth behavior of hypereutectic Al-18Si-5Cu alloy in sand casting was investigated and its influence on mechanical and thermal properties was evaluated in this study....

Experimental investigation of scour evolution around a vertical-axis tidal turbine under combined wave-current action

Scour around vertical-axis tidal turbine (VATT) foundations can threaten the long-term stability of tidal-stream energy systems. This study experimentally investigates scour evolution around a VATT foundation under combined wave-current action, focusing on the effects of flow int...

Bond-slip constitutive model for the strand-concrete interface based on pull-out tests

Bond transfer at the strand–concrete interface governs the anchorage behavior of pretensioned concrete structures. Monotonic central pull-out tests were conducted on 39 specimens containing 15.2 mm seven-wire strands to investigate the effects of effective anchorage length, trans...

Contrasting Nitrate Sources and Transport Pathways in a Connected Karst Surface Water and Groundwater System

Nitrate contamination threatens surface water and groundwater quality in karst regions, posing risks to drinking water safety and aquatic ecosystems. Strong surface water–groundwater connectivity in karst recharge areas can accelerate contaminant transport through fractures and c...

GNSS monitoring and stability evolution mechanism of the S-J1 deformation body in the lower reaches of the Jinsha River

Catastrophic landslides triggered by reservoir impoundment represent one of the most destructive geohazards in the field of hydropower engineering, posing significant threats to human lives, property, and the long-term operational safety of critical infrastructure. A large hydrop...

Chronic disease multimorbidity and mental health among older adults in China: The moderating roles of family and social support

Population aging has been accompanied by a growing prevalence of chronic disease multimorbidity among older adults, raising increasing concerns about its implications for mental health. Although previous studies have documented the negative association between multimorbidity and...

Water and salt migration model of solidified sulfate-contaminated soil by full solid waste cementitious materials

The limitations of the research on the water-salt migration of sulfate-stained soil using solid waste as the sole binding material, such as the difficulty in characterizing the hydration reaction products over time, were addressed in this study. The research focused on different...

An Intelligent Temporal Framework for Interval Prediction of Concrete Dam Deformation

The inherent uncertainty of concrete dam systems, together with the complex influence of environmental loads and measurement noise, makes it difficult for traditional deterministic point prediction models to provide reliable deformation forecasts. In particular, the prediction pe...

A surrogate-driven optimization framework for thermal parameter inversion in hydraulic concrete structures

Thermal parameters are key inputs for numerical thermal analysis of hydraulic concrete structures. Under long-term service conditions, however, these parameters may progressively deviate from their design values because of environmental exposure, material deterioration, and compl...

Depth-dependent response of a liquefiable sand deposit to repeated electrolysis-induced desaturation

Introducing a discrete gas phase into saturated sand reduces the bulk modulus of the pore fluid, but the response of deep deposits to repeated electrolysis-induced desaturation (EID) has received limited field evaluation. A field trial lasting 45 days comprised three energisation...

Study on Preparation and Hydration Mechanism of Sand Washing Residue Mud-Based LC3 Cement by Mechanical–Thermal Activation

To enhance the application value of sand washing residue mud (SWRM) and mitigate its adverse environmental impacts, this study focuses on the resource utilization of SWRM. The research employed a combined mechanical–thermal activation method to enhance the activity of SWRM and ut...

Does the “Zero-Waste City” Policy Improve Urban Land Green Use Efficiency? Evidence from China

Waste accumulation and land carrying pressure are common sustainability challenges in urbanization, making the improvement of urban land green use efficiency (ULGUE) a key issue. Using panel data from 278 Chinese cities over 2008–2023, this study treats zero-waste city pilots as...

Degeneracy-Aware Intensity-Assisted LiDAR–Inertial Odometry with Adaptive Photometric Weighting

LiDAR–inertial odometry (LIO) is accurate in structurally rich environments but can become weakly observable in tunnels, stairways, and open terrain. This study introduces a degeneracy-aware, intensity-assisted LIO method that uses LiDAR reflectivity as an internal sensing modali...