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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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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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The Role of Interface Parameters for the Accurate Numerical Modeling of the Mechanical Behavior of TRM Composites 18th

The Role of Interface Parameters for the Accurate Numerical ...

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18th International Brick and Block Masonry Conference, IB2MaC 2024

作者： Giordano, E. Masciotta, M.G. Clementi, F. Ghiassi, B. Department of Civil Engineering Faculty of Engineering McGill University MontréalQCH3A0C3 Canada Department of Engineering and Geology University "G. d’Annunzio" of Chieti-Pescara viale Pindaro 42 Pescara65127 Italy Department of Civil and Building Engineering and Architecture Polytechnic University of Marche via Brecce Bianche 12 Ancona60131 Italy Department of Civil Engineering University of Birmingham BirminghamB15 2TT United Kingdom

ISBN: (纸本)9783031733093

The preservation and seismic risk mitigation of unreinforced masonry heritage remains a hot topic in structural research. Poor tensile strength, low ductility, irregular texture and lack of transverse connections are among the main causes of the high vulnerability and fragile behavior of historic masonry structures under seismic loading. Aiming to increase the resilience of the built environment to exceptional and unpredicted events, from past three decades the research community has been focusing its attention on investigating the best and durable retrofitting solutions to improve the structural capacity of masonry artefacts. Among the different techniques proposed in the technical literature, the Textile-Reinforced Mortar (TRM) is gaining a growing consensus. TRM composites are a combination of inorganic matrices and high-strength fibers. Thanks to its characteristics of vapor permeability, heat resistance, easy workability and compatibility with many substrate materials, TRM is currently recognized as the most appropriate reinforcement for historic masonry. Nevertheless, many uncertainties still arise about its mechanical behavior due to the complex interactions among its components (fiber and matrix) as well as between the TRM and the substrate to which it is applied. The present study aims to investigate from a numerical viewpoint the TRM three-dimensional behavior and, particularly, the key mechanical parameters necessary for the correct simulation and prediction of its response. This is achieved by replicating a wide multi-scale experimental campaign making use of 3D continuum numerical micro models where each component, including interfaces, is represented separately. The numerical simulation of the tests, carried out by employing consistent parameters throughout the modeling scales, brought to light novel knowledge concerning the minimum number of experiments needed to properly model the behavior of TRM composites. © The Author(s), under exclusive license t

关键词： Tensile strength

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An advanced BPNN/RVEA coupled control strategy for novel immersed liquid cooling battery thermal management system

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Journal of Energy Storage 2025年 125卷

作者： Wu, Yongxi Yuen, Anthony Chun Yin Mo, Chongmao Chen, Qian Huang, Xinyan Department of Building Environment and Energy Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong Department of Architecture and Civil Engineering City University of Hong Kong Hong Kong

This study introduces a novel distributed-inlet circulatory immersion liquid cooling (DIC-IC) battery thermal management system (BTMS), optimised using computational fluid dynamics (CFD), backpropagation neural networks (BPNN), and the reference vector-guided evolutionary algorithm (RVEA). The BPNN model accurately predicted maximum temperature Tmax, temperature difference ΔTmax, and input power. Multi-objective optimisation (MOO) achieved a 24 % reduction in Tmax to 30.13 °C and a 70 % reduction in ΔTmax to 3.58 °C with power consumption of only 0.7 m3/s3, significantly reducing energy usage by up to 95 % compared to initial designs. Dynamic cooling strategies, including static, equilibrium, and boost modes, were proposed to address various operational conditions. The boost mode reduced Tmax and ΔTmax by an additional 5.9 % and 4.3 % respectively under 5C discharge, demonstrating superior thermal safety. These findings provide a practical framework for efficient and low-energy BTMSs that enhance the performance of lithium-ion batteries in high-power density and high-temperature applications. © 2025 Elsevier Ltd

关键词： Lithium-ion batteries

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Investigation of the Impacts of Aircraft Acoustics

Investigation of the Impacts of Aircraft Acoustics

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International Conference on Systems, Control and Automation, ICSCA 2023

作者： Sharma, Bharat Bhushan Sharma, Naveen Kumar Banshwar, Anuj Sharma, Raj Kumar Department of Electronics and Communication Engineering JSS Academy of Technical Education Noida Gautam Buddha Nagar Uttar Pradesh Noida201301 India Electrical Engineering Department IKG Punjab Technical University Punjab Kapurthala India Electrical Engineering Department Government Polytechnic Uttar Pradesh Puranpur India School of Architecture and Planning Apeejay Institute of Technology Gautam Buddha Nagar Uttar Pradesh Greater Noida India

ISBN: (纸本)9789819773831

The work deals with the analysis of effect of aircraft acoustics on human. In this study, measurement and analysis of cargo and fighter aircraft noise at close vicinity of a military airbase was done with sound measurement device. The results shows that noise level during takeoff and landing is greater than 85 dB and people living near to close vicinity of military airbase. To support this work, population-based questionnaire technique and a field study was designed. In population-based questionnaire study, 50 nearby residents were given the questionnaire and 45 residents returned back the filed questionnaire. This research included responses from long-term inhabitants of a military airfield. In addition, human individuals were subjected to three-day controlled research with 90-min sessions each day. Thirty volunteers took part in the field study and reported their opinions on irritation, speech interruption, and perception. The investigation reveals a substantial relationship between the total irritation response and the acceptance of aeroplane noise. The amount of responses demonstrates that people are severely or extremely irritated by aeroplane noise. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Fighter aircraft

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Application of recycled high-density polyethylene for construction of non-structural wattle and daub walls

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Interactions 2025年第1期246卷 1-14页

作者： Ceolin, Valdomiro Neto Gomes, Maria Idália Oliveira, Francisco Louro, Margarida Research Centre for Architecture Urbanism and Design Lisbon School of Architecture CIAUD Universidade de Lisboa Rua Sá Nogueira Polo Universitário do Alto da Ajuda Lisboa1349-063 Portugal Department of Civil Engineering CERIS Nova School of Science and Technology Campus de Caparica Caparica2829-516 Portugal Instituto Superior de Engenharia de Lisboa ISEL Polytechnic Institute of Lisbon Rua Conselheiro Emídio Navarro 1 Lisboa1959-007 Portugal

The evolution of construction techniques has spanned millennia, integrating locally sourced materials with innovative technological advancements. The use of earth in construction demonstrates remarkable versatility, exhibiting plasticity when wet and robust solidity upon drying. The environmental sustainability and abundant availability of earth further reinforce its role in architectural practices. This research explores the integration of recycled thermoplastic technology with traditional earthen construction methods, focusing on non-structural walls combining thermoplastic frameworks and mixed earth techniques. The study places particular emphasis on recycled High-Density Polyethylene (r-HDPE), a material that has garnered acclaim for its role in sustainable development through the reuse of secondary raw materials and its high moldability. The primary function of r-HDPE in this context is as a supplemental framework supporting earthen materials. Utilizing recycling and production methods from Precious Plastic, the research emphasizes the prototyping of r-HDPE structures with diverse configurations, digitally designed to create components ranging from beams to intricate truss networks. The earthen mortar comprises fine and coarse sand, wheat straw, and lime, adhering to traditional mixed earth construction practices. While the materials share structural limitations with conventional mixed earth methods, the potential addition of composites to thermoplastics could improve strength but hinder mechanical recyclability, favoring chemical recycling as an alternative. This study prioritizes recyclability with minimal environmental impact, limiting its scope to mechanical recycling without composite additives. The objective of this study is to achieve a balance between innovative applications of recycled thermoplastics and long-term environmental stewardship, thereby enhancing the synergy between sustainability and construction practices. © The Author(s) 2025.

关键词： Walls (structural partitions)

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Asymmetric sway panel design for noise reduction by modal radiation efficiency tunning approach

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Applied Acoustics 2025年 238卷

作者： Wei, Sheng Li, Ying Qiao, Xiaoru Lee, Yiuyin Choy, Yatsze Department of Mechanical Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong Department of Architecture and Civil Engineering City University of Hong Kong Kowloon Tong Kowloon Hong Kong

Built-up panels are widely employed for noise reduction, with their effectiveness primarily dependent on transverse vibrations, as corroborated by numerous studies. Transverse vibrations occur perpendicular to the panel's surface and are known for their substantial sound radiation. This study introduces a novel technique for tuning modal radiation efficiency, designed to diminish sound radiation from a sway panel comprised of two vertical and one horizontal segment. Notably, when the primary vibration direction of a panel is parallel to its surface (i.e., sway vibration), both the level of transverse vibrations and the corresponding sound radiation efficiency are significantly reduced. A theoretical model was developed to investigate the interplay between transverse and longitudinal vibrations across adjacent components, shedding light on the sound radiation reduction mechanism. The sway structure exhibited a 43.5 % reduction in maximum transverse displacement compared to a simply supported beam, while the maximum longitudinal displacement was adjusted to align with the transverse displacement levels. Moreover, sway modes, in comparison to simply supported beams, demonstrate reduced radiation efficiency due to their dipole-like sound radiation patterns. Consequently, the maximum sound pressure level of the sway structure was lowered by 7 dB compared to that of the simply supported beam. This model also enables the creation of two sway modes with closely spaced frequencies through precise modifications of lengths and thicknesses, highlighting the significance of asymmetric geometry. Furthermore, comparisons of the proposed model with finite element methods and experimental results confirm a strong concordance, validating the effectiveness of the sway structure in achieving reduced sound radiation. © 2025 Elsevier Ltd

关键词： Structural panels

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