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International Mid-Term Conference of the Italian Association of Agricultural engineering, MID-TERM AIIA 2024

作者： Chiappini, Stefano Marcheggiani, Ernesto Malinverni, Eva Savina Choudhury, Md Abdul Department of Construction Civil Engineering and Architecture Marche Polytechnic University Ancona Italy Department of Agricultural Food and Environmental Sciences Marche Polytechnic University Ancona Italy

ISBN: (纸本)9783031842115

Rapid and extensive landscape changes have renewed interest in these landscapes’ cultural and heritage values. Efforts are underway to inventory, monitor, and evaluate landscapes to develop effective management and conservation plans, giving rise to new concepts. This study applied advanced tools such as the Maptools landscape metrics tool and GIS to map and analyse historical landscape transformations in Cartoceto, Italy. Using aerial photos from 1955, 1988 and 2019, we identified patterns and changes in landscape character, revealing significant trends in land use and ecological diversity. Our findings enhance understanding of landscape dynamics and inform conservation strategies, particularly within the European Union’s Geographical Indications scheme. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Mapping

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Nonlinear rheological behavior of asphalt based on large amplitude oscillation shear test under different loading,aging,and modification conditions

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Journal of Road engineering 2025年第1期5卷 48-64页

作者： Jiaqiu Xu Zijia Wang Zepeng Fan Junfu Liu Guoyang Lu Dawei Wang School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina Civil Aviation Research Base(Beijing)Co. Ltd.Beijing 100621China Department of Architecture and Civil Engineering City University of Hong KongHong KongChina

To reveal the effects of environmental and loading conditions, as well as asphalt properties on the nonlinear rheological behavior of asphalt, the large amplitude oscillation shear(LAOS) test was introduced, and the Fourier transform rheology, Lissajous curve method, and the LAOS fatigue test have been applied to investigate the nonlinear rheological behavior of asphalt binders. The research results indicate that a decrease in temperature, an increase in shear frequency and strain level, the introduction of polymer modifiers, and the aging effect of asphalt can significantly increase the nonlinearity of asphalt, manifested by the higher relative magnitude of the third harmonic and zero-strain nonlinear coefficient. For the two polymer modifiers selected in this study, the 4%polyurethane modifier exhibits a higher nonlinear lifting effect than the 4% styrene-butadiene-styrene(SBS). The impact of long-term aging on nonlinear viscoelasticity is observably greater than that of short-term aging. The zero-strain nonlinear coefficient estimated based on the average value method can accurately characterize the nonlinear viscoelasticity of asphalt, which can serve as an effective supplement to the relative magnitude of the third harmonic. All asphalts exhibit shear thinning behavior under the test temperature of 24℃, and the decrease in test temperature, the increase in shear rate and strain level, the introduction of modifiers, and the aging effect of asphalt all exacerbate the shear thinning behavior of asphalt. In addition, the fatigue failure process of asphalt materials is accompanied by an increasing degree of nonlinearity.

关键词： Nonlinear viscoelasticity Polymer modified asphalt Large amplitude shear oscillation Rheological behavior Shear thinning

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Graph-theoretical investigation of trajectory dynamics and size characteristics in tropical cyclones

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Natural Hazards 2025年 1-18页

作者： Wang, Yixiang Wang, Jiayao Chang, Yu Cai, Kang Li, Sunwei Dong, You Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology Kowloon Clear Water Bay Hong Kong Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Kowloon Hung Hom Hong Kong Institute for Ocean Engineering Tsinghua Shenzhen International Graduate School Guangdong Shenzhen China Institute of Structural Engineering College of Civil Engineering and Architecture Zhejiang University Hangzhou China School of Civil Engineering and Architecture Guangxi University Nanning China

The intensification of climate changes has led to increased tropical cyclone (TC) intensities and subsequent damage, emphasizing the critical need for accurate trajectory prediction to mitigate their impact. In this study, a graph-theory-based approach was employed for the identification of TC trajectory. Using reanalysis data, each targeted TC can be constructed as a graph during its TC lifetime. Four graph metrics are computed from each graph constructed using different data sources, including mean sea level pressure, wind speed, and total precipitation. Among the graphs constructed, those representing mean sea level pressure (MSLP) and wind speed at 10 m (WD10) graphs show superior advantages in identifying TC trajectory. Furthermore, the metric PageRank of MSLP graph even reveals a notable ability to estimate TC size. Comparisons with a similar graph-theoretical approach demonstrate that our method exhibits superior performance in capturing complex TC dynamics. We anticipate to integrating the graph-theory-based approach into machine learning models to enhance the accuracy of predicting TC trajectories and intensities in future studies. © The Author(s) 2025.

关键词： Forecast model Machine learning Trajectory Tropical cyclone

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Standardized Assessment, LiDAR-Based Measurements, and Human Perception of Traffic Signs 3rd

Standardized Assessment, LiDAR-Based Measurements, and Human...

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3rd International Conference on Cognitive Mobility, CogMob 2024

作者： Aldoski, Ziyad N. Koren, Csaba Department of Highway and Bridge Technical College of Engineering Duhok Polytechnic University Kurdistan Region Duhok Iraq Department of Transport Infrastructure and Water Resources Engineering Faculty of Architecture Civil Engineering and Transportation Sciences Széchenyi István University Győr Hungary

ISBN: (纸本)9783031817984

Traffic signs are essential informative tools for road users, with their quality regulated by international standards. Among the critical parameters for evaluation is retroreflectivity. With the rise of autonomous vehicles (AVs), new tools like LiDAR sensors and cameras have become crucial for assessing traffic signs. However, the relationship between human perception and the physical properties of these signs remains underexplored. This study compares traffic sign evaluations using retroreflectivity measurements, LiDAR data, and human assessment. Approximately 160 traffic signs were analyzed using standardized retroreflectivity measurements, with additional data collected from two different LiDAR systems mounted on an AV. Volunteers conducted human evaluations assessing visibility, legibility, and contrast with surroundings. The handheld reflectometer provided a wide range of retroreflectivity readings, while LiDAR data showed good contrast between sign faces and surroundings, though results varied between the two systems. Human assessments correlated strongly with overall appearance but showed limited correlation with the other methods. This study highlights the strengths and limitations of each evaluation approach, offering insights for improving traffic sign assessment techniques. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Autonomous vehicles

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Planning optimal minimum-jerk trajectories for redundant robots

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Robotics and Autonomous Systems 2025年 192卷

作者： Lozer, Federico Scalera, Lorenzo Boscariol, Paolo Gasparetto, Alessandro Polytechnic Department of Engineering and Architecture University of Udine Udine33100 Italy Department of Management and Engineering University of Padova Vicenza36100 Italy

In this paper, a minimum-jerk trajectory planning approach for redundant manipulators is presented. The proposed approach leverages not only the optimization of the time intervals between each of the way points of the assigned path, but also the optimal positions of a selected robot joint to reduce the jerk of the robot end-effector. This multi-stage optimization strategy is validated through extensive numerical simulations and experimental tests on a robot with seven degrees of freedom performing a pick-and-place motion. The results of the tests, supported by accelerometer measurements of the vibrations of the robot end-effector, prove the performance of the proposed approach in reducing both the acceleration and the jerk levels of the redundant manipulator in comparison with a state-of-the-art trajectory planning technique. © 2025 The Authors

关键词： Grippers

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Deformation Mechanism in Central China Revealed by Regional Earthquake Tomography

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Seismological Research Letters 2025年第3期96卷 1561-1572页

作者： Hua, Yujin Zhang, Shuangxi Liu, Yu Liu, Li Wu, Tengfei Wei, Yu Li, Bin Department of Earth Sciences and Engineering Taiyuan University of Technology Taiyuan China Department of Geophysics School of Geodesy and Geomatics Wuhan University Wuhan China School of Geophysics and Measurement-Control Technology East China University of Technology Nanchang China College of Civil Engineering Taiyuan University of Technology Taiyuan China School of Civil Engineering and Architecture Hubei Polytechnic University Huangshi China China Huadian Corporation Ltd. Beijing China

The central China region (CCN) has experienced significant deformation and complex structural arrangements. We conducted research on the deformation pattern of the CCN through the 3D velocity structure of the crust and uppermost mantle obtained via body-wave tomography. This velocity structure strongly correlates with the region’s topographic features. The relationship between velocity distributions and topography indicates that compression in the east–west direction, which can lead to crustal and mantle shortening, may play a crucial role in shaping topography. The various structures between the Qinling mountain range in the west and the Tongbai–Dabie mountain range in the east highlight distinct geological processes occurring along the Qinling–Dabie orogenic belt. In addition, we propose that reservoir water has infiltrated the crystalline basement rock layer up to 15–20 km beneath the Three Gorges Reservoir. Furthermore, the Three Gorges Dam serves as a solid foundation to prevent reservoir water from seeping downstream underground. © Seismological Society of America.

关键词： Crystalline rocks

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Stress concentration optimization for functionally graded plates with noncircular holes

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Computers and Structures 2025年 315卷

作者： Abdalla, Hassan Mohamed Abdelalim De Bona, Francesco Casagrande, Daniele Polytechnic Department of Engineering and Architecture University of Udine Via delle Scienze 206 Udine33100 Italy

In this paper, the minimization of the stress concentration due to noncircular holes and cutouts in functionally graded infinite plates subjected to uni-axial traction is considered. Under reasonable assumptions regarding the type of material variation, an optimization problem aimed at determining the best Young's modulus distribution throughout the plate without prefixing its functional form is numerically solved. The solution technique involves embedding the isoparametric finite element method within a sequential quadratic programming algorithm for constrained nonlinear programming problems. Motivated by results of a recent study concerning infinite plates with a circular hole, this work presents a non-trivial generalization of the best tailoring approach for a broader class of geometrical discontinuities. Three practical examples such as elliptic holes, rectangular slots with semicircular ends and circular holes with opposite semicircular lobes are considered and numerical optimal solutions for the Young's modulus distribution lead to elastic performance that outperforms the homogeneous and commonly employed prefixed gradation laws. The associated stress behavior is shown in graphical form for different stiffness ratios of the constituents, discussed and compared to the homogeneous plates. © 2025

关键词： Stress concentration

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Review of rules of mixture for effective elastic properties in fibrous and particulate composite materials

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Composite Structures 2025年 367卷

作者： Abdalla, Hassan Mohamed Abdelalim Polytechnic Department of Engineering and Architecture University of Udine Via delle Scienze 206 Udine33100 Italy

Micromechanics based models have been playing an important role in predicting the effective elastic properties of particulate and fibrous linearly elastic composite materials. This paper reviews the simplest most widely-used class of micromechanics models, the so-called rules of mixture, and aims to clarify various misconceptions in their applicability by providing concise derivations from both the mechanics-of-materials and continuum-mechanics approaches. The paper critically reviews the areas in which these analytical models can yield good predictions of effective elastic properties and various historical interventions when properties are underestimated. Besides, it illustrates a generalized framework able to justify their assumptions as lower and upper bounds for elastic properties, though of modest practical application when compared to more refined theories. Eventually, the position of these models with respect to classic assumptions of dilute dispersion is investigated and emphasized with reference to experimental data. © 2025 The Author

关键词： Metamaterials

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Integrating environmental sustainability in construction Time-Cost trade-off for decision-making using hybrid NSGA-III and MOPSO approach

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Asian Journal of Civil engineering 2025年第4期26卷 1527-1542页

作者： Nagayo, Analene Montesines Singh, Rekha Dhawan, Amit Manjunath, T.C. Qasem, Altayeb Sethi, Krushna Chandra Sharma, Kamal Department of Engineering and Technology University of Technology and Applied Sciences-Al Musanna Al Muladdah Oman Department of Civil Engineering Raj Kumar Goel Institute of Technology Ghaziabad India Department of Civil Engineering Dr. Bhim Rao Ambedkar Polytechnic College Gwalior India Computer Science Engineering Department Rajarajeswari College of Engineering Bangalore India Department of Building Engineering College of Architecture and Planning Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia Department of Civil Engineering Centurion University of Technology and Management Gajapati India Department of Civil Engineering Madhav Institute of Technology and Science Gwalior India

Construction project management often involves optimizing time and cost while ensuring minimal environmental impact. This study presents an innovative hybrid approach combining non-dominated sorting genetic algorithm III (NSGA-III) and multi-objective particle swarm optimization (MOPSO) to address the time-cost-environmental sustainability trade-off (TCEST) in construction projects. The proposed model aims to minimize project completion time and cost while maximizing environmental sustainability. A case study is conducted to validate the model, incorporating diverse construction activities and their respective time, cost, and environmental sustainability metrics. The results reveal Pareto-optimal solutions demonstrating significant trade-offs among the three objectives. The hybrid approach outperforms standalone algorithms in terms of solution diversity, convergence, and hypervolume indicators. Weighted sum methods are employed to select the most suitable solution from the Pareto front based on project priorities. Correlation analysis further explores interdependencies among objectives, emphasizing the feasibility of balancing these critical factors. The study contributes a robust decision-support tool for sustainable project planning, facilitating informed decision-making in modern construction management. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Hybrid Optimization MOPSO NSGA-III Sustainable Construction Time–Cost-Environmental Trade-off

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A finite viscoelastic phase-field model for prediction of crack propagation speed in elastomers

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European Journal of Mechanics, A/Solids 2025年 113卷

作者： Ciambella, Jacopo Lancioni, Giovanni Stortini, Nico Department of Structural and Geotechnical Engineering Sapienza University of Rome Rome Italy Department of Civil and Building Engineering and Architecture Polytechnic University of Marche Ancona Italy

Crack propagation in soft viscoelastic solids is crucial in many applications, yet accurate modeling of their fracture behavior, particularly the rate-dependent fracture toughness, remains a challenge. We address this by proposing a thermodynamically consistent phase-field fracture model for viscoelastic materials. The model incorporates both equilibrium and non-equilibrium elastic energies, along with distinct dissipation mechanisms for viscous losses and irreversible damage processes. Importantly, two characteristic time scales are introduced, reflecting the distinct nature of viscous relaxation and damage evolution, both of which significantly influence crack propagation dynamics. Numerical simulations are performed to investigate the impact of the different energy contributions on the fracture propagation in elastomeric membranes, accompanied by comparisons to experimental results. © 2025 The Authors

关键词： Crack propagation

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