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14th World Congress on Intelligent Transport Systems, ITS 2007

作者： Guo, Amy Weihong Blythe, Phil Olivier, Patrick Singh, Pushpendra Ha, Hai Nam Transport Operations Research Group School of Civil Engineering and Geosciences United Kingdom Culture Lab-School of Computing Science Newcastle University Newcastle upon Tyne NE1 7RU United Kingdom

ISBN: (纸本)9781617387777

We present an immersive video system that has been developed for the purpose of evaluating future traveller information system (FTIS), in particular, FTIS scenarios that rely on a pervasive computing infrastructure. Immersive video uses multiple video streams captured from a first person perspective at key locations in a scenario. By dynamically reconstructing a user's visual and aural experiences, the immersive video system creates a lab-based framework that captures a number of the contextual factors of real-world mobile information system use. Graphical user interfaces, displayed on a PDA and a wearable display, are used inthe evaluation. We present both the technical basis of the immersive video system and its application to the study of user perceptions and reactions to pervasive information services.

关键词： Information services

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Water best paper award 2015

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Water (Switzerland) 2015年第2期7卷 833-835页

作者： Scholz, Miklas Civil Engineering Research Group School of Computing Science and Engineering The University of Salford Newton Building Salford Greater Manchester England United Kingdom

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Corrections to “The Recent Technologies to Curb the Second-Wave of COVID-19 Pandemic”

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IEEE Access 2025年 13卷 5436-5436页

作者： M. Poongodi Mohit Malviya Mounir Hamdi Hafiz Tayyab Rauf Seifedine Kadry Orawit Thinnukool College of Science and Engineering Hamad Bin Khalifa University Qatar Foundation Doha Qatar Department of CTO 5G Wipro Ltd. Bengaluru India Centre for Smart Systems AI and Cybersecurity Staffordshire University Stoke-on-Trent U.K. Faculty of Applied Computing and Technology Noroff University College Kristiansand Norway Research Group of Embedded Systems and Mobile Application in Health Science College of Arts Media and Technology Chiang Mai University Chiang Mai Thailand

Presents corrections to the paper, (Corrections to “The Recent Technologies to Curb the Second-Wave of COVID-19 Pandemic”).

关键词： COVID-19 Pandemics

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Applications of bispectrum analysis to inspection of fatigue damage in quay cranes 58

Applications of bispectrum analysis to inspection of fatigue...

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58th International Conference on Vibroengineering

作者： Cui, Li Cao, Maosen Zhang, Hao Hu, Shuigen Wang, Jie Anhui Provincial International Joint Research Center of Data Diagnosis and Smart Maintenance on Bridge Structures Chuzhou University Anhui China College of Civil and Architecture Engineering Chuzhou University Anhui China Intelligent Transportation and Intelligent Construction Engineering Research Center Jiangsu Dongjiao Intelligent Control Technology Group Co. Nanjing China

The quay crane is a special mechanical equipment which can lift the container vertically and horizontally through intermittent circulation movement. Fatigue crack is one of the main kinds of damage in quay cranes. The generation and development of fatigue crack are invisible, which makes the identification of fatigue cracks a great challenge. From the dynamic point of view, fatigue cracks have nonlinear dynamic characteristics beyond the linear dynamic category. The traditional damage detection methods based on linear hypothesis are difficult to effectively recognize the nonlinear dynamic characteristics of fatigue cracks, so they cannot be effectively used for structural fatigue crack detection. In order to overcome the limitations of the existing linear damage detection methods, bispectrum analysis, a nonlinear dynamic analysis method, is introduced in this thesis. By drawing on the use of bispectrum analysis to describe the nonlinear dynamic characteristics of rotating structures, a fatigue crack detection method based on nonlinear dynamic characteristics of quay cranes is developed. Copyright © 2022 Li Cui, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

关键词： Crack detection

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Finite Element Simulation of Nonlinear Convective Heat and Mass Transfer in a Micropolar Fluid-Filled Enclosure with Rayleigh Number Effects

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International Journal of Applied and Computational Mathematics 2017年第2期3卷 1347-1379页

作者： Bhargava, R. Sharma, S. Bhargava, P. Bég, O. Anwar Kadir, A. Department of Mathematics Indian Institute of Technology Roorkee India Fluid Mechanics Department of Civil Engineering Indian Institute of Technology Roorkee India Fluid Mechanics Spray Research Group School of Computing Science and Engineering University of Salford G77 Newton Building Manchester M54WT United Kingdom

A mathematical model is presented to study the double-diffusive convective heat and mass transfer of a micropolar biofluid in a rectangular enclosure, as a model of transport phenomena in a bioreactor. The vertical walls of the enclosure are maintained at constant but different temperatures and concentrations. The conservation equations for linear momentum, angular momentum, energy and species concentration are formulated subject to appropriate boundary conditions and solved using both finite element and finite difference numerical techniques. Results are shown to be in excellent agreement between these methods. Several special cases of the flow regime are discussed. The distributions for streamline, isotemperature, isoconcentration and (isomicrorotation) are presented graphically for different Lewis number, buoyancy parameter, micropolar vortex viscosity parameter, gyration viscosity parameter, Rayleigh number, Prandtl number and micro-inertia parameter. Micropolar material parameters are shown to considerably influence the flow regime. The flow model has important applications in hybrid aerobic bioreactor systems exploiting rheological suspensions e.g. fermentation. © 2016, Springer India Pvt. Ltd.

关键词： Bioreactors Diffusion Double-diffusive heat and mass transfer Enclosure Iso-micro-rotation Lewis number Micropolar biofluid Numerical solutions Rayleigh number Vortex viscosity

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Damage identification for carbon/epoxy laminated composite structures based on wave propagation analysis

Damage identification for carbon/epoxy laminated composite s...

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46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

作者： Lestari, Wahyu Qiao, Pizhong University of Akron Akron OH 44325-3905 Advanced Materials and Structures Research Group Department of Civil Engineering University of Akron Akron OH 44325-3905 Integrated Smart Structures Inc. 2601 Twin Creeks Dr Copley OH 44321-1770

This paper presents experimental results of a proposed damage identification candidate based on Lamb wave propagation analysis. The wave is transmitted and received by using piezoelectric transducers (PZTs). Based on the measured time history data of the propagated wave, the traveling time, speed reduction and wave attenuation parameters are extracted and used as the damage identification variables. Post-processing of the recorded signals using wavelet transform allows better isolation of the interested propagation mode and extraction of the traveling time, which enhance the accuracy of damage localization. Carbon/epoxy laminated composite specimens with various damage, i.e., beams with delaminations, saw cut and impact damage, and plates with delamination are evaluated. The classification of damage types in the composite structures will be recognized and deduced from the examination of the wave propagation profile after interaction with damages. This study will provide the location and experimental propagation profiles of three different damages in composite structures (i.e., delaminations, saw cut and impact damage). Copyright © 2005 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Laminated composites

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Hydrodynamics of heterogeneous particle swarms in gas-liquid-solid stirred tanks with free surface studied by DEM-VOF

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Powder Technology 2025年 462卷

作者： E, Dianyu Wen, Yingming Wu, Yiliu Li, Jing Sun, Weifu Liu, Yonggang Chen, Chao Cui, Jiaxin Qiu, Yinxuan Jiangxi Provincial Key Laboratory of Particle Technology Jiangxi University of Science and Technology Nanchang330013 China Research Centre for Intelligent Mineral Processing & Metallurgy International Institute for Innovation Jiangxi University of Science and Technology Nanchang330013 China ARC Research Hub for Smart Process Design and Control Department of Chemical and Biological Engineering Monash University VIC3800 Australia School of Civil Engineering Southeast University Nanjing211189 China Advanced Technology Research Institute Beijing Institute of Technology Jinan250307 China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou341000 China Xinyu Iron and Steel Group Co. Ltd Xinyu338001 China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan030024 China School of Chemical Engineering The University of Queensland QLD4072 Australia

Stirred tanks play a pivotal role in material blending, yet there is still a lack of data on inner complex blending mechanism, especially involving heterogeneous particle swarm with different shape combinations. This study extensively develops the DEM-VOF model, in which different drag force models are applied based on the identification of particle shapes. It aims to provide an insight into the blending system dynamics of heterogeneous particle swarms through seven arranged particle schemes building upon three different shapes. The results show that the oblate-prolate ellipsoid particle scheme has the optimal suspension performance, but demonstrates high power consumption. The addition of spherical particles into the oblate-prolate ellipsoid particle scheme has significant effect on particle suspension, fluid flow and the evolution of free surface, while contributes to a reduction in power consumption. This study presents an analysis of the hydrodynamics and optimization of blending systems involving heterogeneous particle swarms in stirred tanks. © 2025 Elsevier B.V.

关键词： Flow of gases

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A global interpolation function (GIF) boundary element code for viscous flows 31st

A global interpolation function (GIF) boundary element code ...

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31st Joint Propulsion Conference and Exhibit, 1995

作者： Lafe, O. Reddy, D.R. Cheng, A.H. OLTech Corporation Innovative Computing Group 11795 Sherwood Trail ChesterlandOH44026 United States NASA-Lewis Research Center ClevelandOH44135 United States Department of Civil Engineering University of Delaware NewarkDE19716 United States

Using global interpolation functions (GIFs), boundary element solutions are obtained for two- and three-dimensional viscous flows. The solution is obtained in the form of a boundary integral plus a series of global basis functions. The unknown coefficients of the GIFs are determined to ensure the satisfaction of the governing equations at selected collocation points. The values of the coefficients involved in the boundary integral equations are determined by enforcing the boundary conditions. Both primitive- variable and vorticity-velocity formulations are examined. © 1995, American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Viscous flow

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The Needs, Challenges, and Priorities for Advancing Global Flood research

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WIREs Water 2025年第3期12卷

作者： Vidya Samadi Hayley J. Fowler Jessica Lamond Thorsten Wagener Manuela Brunner Jonathan Gourley Hamid Moradkhani Ioana Popescu Conrad Wasko Daniel Wright Huan Wu Ke Zhang Paola A. Arias Qingyun Duan Ali Nazemi Peter J. van Oevelen Andreas F. Prein Joshua K. Roundy Mostafa Saberian Lisa Umutoni Agricultural Sciences Department Clemson University Clemson South Carolina USA Artificial Intelligence Research Institute for Science and Engineering (AIRISE) School of Computing Clemson University Clemson South Carolina USA School of Engineering and Tyndall Centre for Climate Change Research Newcastle University Newcastle upon Tyne UK Centre for Architecture and Built Environment Research University of the West of England Bristol UK Institute of Environmental Science and Geography University of Potsdam Potsdam Germany Institute for Atmospheric and Climate Science ETH Zurich Zurich Switzerland WSL Institute for Snow and Avalanche Research SLF Davos Dorf Switzerland Climate Change Extremes and Natural Hazards in Alpine Regions Research Center CERC Davos Dorf Switzerland NOAA/National Severe Storms Laboratory Norman Oklahoma USA Center for Complex Hydrosystems Research and Department of Civil Construction and Environmental Engineering The University of Alabama Tuscaloosa Alabama USA IHE Delft Institute for Water Education Delft the Netherlands Faculty of Civil Engineering and Geosciences Delft University of Technology Delft the Netherlands School of Civil Engineering The University of Sydney Sydney New South Wales Australia Civil and Environmental Engineering University of Wisconsin-Madison Madison Wisconsin USA Southern Marine Science and Engineering Laboratory and School of Atmospheric Sciences Sun Yat-Sen University Guangdong China College of Hydrology and Water Resources Hohai University Nanjing Jiangsu China GIGA Group School of Environment University of Antioquia Antioquia Colombia Center for Hydrometeorological Predictions College of Hydrology and Water Resources Hohai University Nanjing Jiangsu China Department of Building Civil and Environmental Engineering Concordia University Montreal Quebec Canada International GEWEX Project Office Fairfax Virginia USA Department of Atmospheric Oceanic and Earth Sciences George Mason University

In recent years, numerous flood events have caused loss of life, widespread disruption, and damage across the globe. These devastating impacts highlight the importance of a better understanding of flood generating processes, their impacts, and their variability under climate and landscape changes. Here, we argue that the ability to better model flooding is underpinned by the grand challenge of understanding flood generation mechanisms and potential impacts. To address this challenge, the World Meteorological Organization-Global Energy and Water Exchanges (GEWEX) Hydrometeorology Panel (GHP) aims to establish a Global Flood Crosscutting project to propagate flood modeling and research knowledge across regions and to synthesize results at the global scale. This paper outlines a framework for understanding the dynamics and impacts of runoff generation processes and a rationale for the role of a Global Flood Crosscutting project to address these challenges. Within this Global Flood Crosscutting project, we will establish a common terminology and methods to enable the global research community to exchange knowledge and experiences, and to design experiments toward developing actionable recommendations for more effective flood management practices and policies for improved resilience. This harmonization of rich perspectives across disciplines will foster the co-production of knowledge primed to advance flood research, particularly in the current period of heightened climate variability and rapid change. It will create a new transdisciplinary paradigm for flood science, wherein different dimensions of mechanistic understanding and processes are rigorously considered alongside socioeconomic impacts, early warning communications, and longer-term adaptation to alleviate flood risks in society.

关键词： effective flood management flood mechanistic understanding flood modeling GEWEX knowledge exchange

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Effect of pavement marking contrast on the performance of vision-based lane departure warning systems

Effect of pavement marking contrast on the performance of vi...

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15th World Congress on Intelligent Transport Systems and ITS America Annual Meeting 2008

作者： Hadi, Mohammed Sinha, Prasoon Ozen, Halit Lehman Center for Transportation Research Department of Civil and Environmental Engineering College of Engineering and Computing Florida International University 10555 W. Flagler Street EC 3605 Miami FL 33174 United States Senior Transportation Engineer ARCADIS US INC. 2849 Paces Ferry Road Suite 400 Atlanta United States Yildiz Technical University Department of Civil Engineering Transportation Research Group 34349Beşiktaş Istanbul Turkey

ISBN: (纸本)9781615677566

This paper investigates the effects of the colors of pavement and lane marking on the performance of a lane departure warning system. The performance of the system was tested on highway sections of different facility types and with pavements and markings of varying types and attributes in Texas and Florida. The results presented in this paper indicate that the tested lane departure warning system was not able to detect the yellow markings for some highway segments with light concrete and asphalt pavement colors in daylight conditions. It was found, based on analyses of the digital images taken of the pavement markings and the background pavement surfaces, that the inability to detect the yellow markings can be related to measures of the marking and pavement colors.

关键词： Color

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