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International Conference on Wider-Uptake of Water Resource Recovery from Wastewater Treatment, ICWRR 2024

作者： Vicente, D.J. Pascacio, P. Salazar, F. Rodríguez-Chueca, J. Polo, M.I. Oller, I. CIMNE - International Centre for Numerical Methods in Engineering Madrid Spain Barcelona08034 Spain Department of Industrial Chemical & Environmental Engineering Escuela Técnica Superior de Ingenieros Industriales Universidad Politécnica de Madrid C/José Gutiérrez Abascal 2 Madrid28006 Spain CIEMAT- Plataforma Solar de Almería Ctra. De Senés S/N Tabernas Almería04200 Spain CIESOL Joint Centre of the University of Almería-CIEMAT Almería04120 Spain

ISBN: (纸本)9783031633522

The use of Machine Learning (ML) based methodologies is becoming an increasingly widespread technique for predicting the efficiency of Advanced Oxidation Processes (AOP) in wastewater treatment and regeneration. However, most studies focus predominantly on one or several organic compounds, without including contaminants of emerging concern. In addition, the outcomes are still far from being applicable to practical scenarios. To fill this gap, we are developing the DIGIT4WATER project, with the main objective of generating ML models to predict degradation levels of various pollutants, many of which are of particular importance concerning current legislation. To this end, a large and comprehensive database is being generated, which includes AOPs and photo-chemical processes based on UV-C or direct solar radiation. The project is aimed at building innovative digital tools for compliance with the new European regulation (EU 2020/741) governing water reuse in agriculture. This paper presents the current results, focusing on the proposed methodological framework, together with the next steps that will be carried out in the final phase of the project. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Wastewater treatment

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Development of a technological package “drying unit”: From design to marketing strategy

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AIP Conference Proceedings 2023年第1期2976卷

作者： Nadiia Artyukhova Jan Krmela Vladimíra Krmelová Artem Artyukhov Dastan Ospanov Academic and Research Institute of Business Economics and Management Department of Marketing Sumy State University 2 Rymskogo-Korsakova St. 40007 Sumy Ukraine Faculty of Industrial Technologies in Púchov Department of Numerical Methods and Computational Modeling Alexander Dubček University of Trenčín Ivana Krasku 491/30 02001 Púchov Slovakia Faculty of Industrial Technologies in Púchov Department of Materials Technologies and Environment Alexander Dubček University of Trenčín Ivana Krasku 491/30 02001 Púchov Slovakia Faculty of Engineering Department of Transport Engineering and Technology Saken Seifullin Kazakh Agrotechnical University Zhengis Ave 62 010000 Nur-Sultan Kazakhstan

The work is devoted to developing a technological package “drying unit” using a multistage gravitational dryer as the main equipment. The study aims to create a workable sample of a drying module and propose an algorithm for its industrial implementation. The work uses methods of analysis and synthesis, search for cause-and-effect relationships, theoretical and computer modeling, and experimental studies. The main stages of drying granular materials in a multistage gravitational shelf dryer are described. The tools of influence of the design features of the dryer on the nature of the flow of each stage of the drying process are shown. A variant of the technological scheme of the drying unit and the scheme of automation of the drying process are presented. A set of solutions is proposed for monitoring the technological level of readiness of the ”drying unit” package for industrial implementation. A marketing strategy for the transfer of drying technology using a multistage dryer is described. The result of the study is a roadmap for developing and implementing a drying module using devices with active hydrodynamic modes.

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Asymptotic Dynamics of High Dynamic Range Stratified Turbulence

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Physical Review Letters 2019年第19期122卷 194504-194504页

作者： G. D. Portwood S. M. de Bruyn Kops C. P. Caulfield Department of Mechanical and Industrial Engineering University of Massachusetts Amherst Massachusetts 01003 USA Continuum Models and Numerical Methods (XCP-4) X-Computational Physics Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA BP Institute University of Cambridge Cambridge CB3 0EZ United Kingdom Department of Applied Mathematics and Theoretical Physics University of Cambridge Cambridge CB3 0WA United Kingdom

Direct numerical simulations of homogeneous sheared and stably stratified turbulence are considered to probe the asymptotic high dynamic range regime suggested by Gargett et al. J. Fluid Mech. 144, 231 (1984) and Shih et al. J. Fluid Mech. 525, 193 (1999). We consider statistically stationary configurations of the flow that span three decades in dynamic range defined by the separation between the Ozmidov length scale LO=ε/N3 and the Kolmogorov length scale LK=(ν3/ε)1/4, up to Reb≡(LO/LK)4/3=ε/(νN2)∼O(1000), where ε is the mean turbulent kinetic energy dissipation rate, ν is the kinematic viscosity, and N is the buoyancy frequency. We isolate the effects of Reb, particularly on irreversible mixing, from the effects of other flow parameters of stratified and sheared turbulence. Specifically, we evaluate the influence of dynamic range independent of initial conditions. We present evidence that the flow approaches an asymptotic state for Reb⪆300, characterized both by an asymptotic partitioning between the potential and kinetic energies and by the approach of components of the dissipation rate to their expected values under the assumption of isotropy. As Reb increases above 100, there is a slight decrease in the turbulent flux coefficient Γ=χ/ε, where χ is the dissipation rate of buoyancy variance, but, for this flow, there is no evidence of the commonly suggested Γ∝Reb−1/2 dependence when 100≤Reb≤1000.

关键词： Shear flows Stratified geophysical flows Turbulence

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Temperature dependence of thermal properties of thermoplastic polyurethane-based carbon nanocomposites

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AIP Conference Proceedings 2016年第1期1768卷

作者： Kopal Ivan Koštial Pavol Valíček Jan Harničárová Marta Jančíková Zora 1VŠB-TU Ostrava Faculty of Mining and Geology Institute of Physics 17. listopadu 15 708 33 Ostrava-Poruba Czech republic 2TnUAD of Trenčin Faculty of Industrial Technologies in Puchov Department of Numerical Methods and Computing Modelling I. Krasku 491/30 Slovakia 3VŠB-TU Ostrava Faculty of Metallurgy and Materials Engineering Department of Material Engineering 17. listopadu 15 708 33 Ostrava-Poruba Czech republic 4VŠB-TU Ostrava Institute of Clean Technologies for Mining and Utilization of Raw Materials for Energy Use 17. listopadu 15 708 33 Ostrava-Poruba Czech republic 5VŠB-TU Ostrava Faculty of Metallurgy and Materials Engineering RMTVC 17. listopadu 15 708 33 Ostrava-Poruba Czech republic 6VŠB-TU Ostrava Faculty of Metallurgy and Materials Engineering Department of Automation and Computing in Metallurgy 17. listopadu 15 708 33 Ostrava-Poruba Czech republic

The present work is focused on the analysis of the temperature dependence of thermophysical parameters of polymeric nanocomposites based on a thermoplastic polyurethane matrix filled with different amounts of single-walled carbon nanotubes of high purity. The temperature dependence of thermal conductivity, thermal diffusivity, and specific heat capacity were analysed in a wide temperature range. The regression models of experimental data showed a good agreement with physical models based on the quantum interpretation of thermal transport phenomena in the solid materials above the Debye temperature. The temperature dependences of all three investigated thermophysical parameters showed the secondary relaxation transition that occurred in all tested nanocomposite materials. Moreover, the first-order exponential model for the dependence of investigated thermophysical parameters on the amount of single-walled carbon nanotubes in the thermoplastic polyurethane matrix at standard temperature and pressure has been created.

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26th Annual Computational Neuroscience Meeting (CNS*2017) of the Organization for Computational Neuroscience Antwerp, Belgium, July 15-20, 2017

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 59-59页

作者： [Anonymous] Indiana University Purdue University Indianapolis Indianapolis IN 46032 USA Stark Neurosciences Research Institute Indiana University School of Medicine Indianapolis IN 46032 USA Department of Mathematics East Carolina University Greenville NC 27858 USA Jülich Supercomputing Centre Forschungszentrum Jülich 52425 Jülich Germany Future Systems Swiss National Supercomputing Centre 8092 Zurich Switzerland User Engagement and Support Swiss National Supercomputing Centre 6900 Lugano Switzerland Institut de Neurosciences des Systèmes Aix Marseille Univ 13005 Marseille France Simulation Lab Neuroscience Forschungszentrum Jülich Jülich Germany Department of Experimental Psychology Ghent University 9000 Ghent Belgium Donders Center for Cognitive Neuroimaging Radboud University 6525HR Nijmegen The Netherlands Department of Electrical Computer and Energy Engineering University of Colorado Boulder CO 80309 USA Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Neurology Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Otolaryngology Johns Hopkins School of Medicine Baltimore MD 21287 USA INSERM U968 Paris France Sorbonne Universités UPMC University Paris 06 UMR_S 968 Institut de la Vision Paris France CNRS UMR_7210 Paris France Department of Computer Architecture and Technology University of Granada (CITIC) Granada Spain Sorbonne Universités UPMC Univ Paris 06 INSERM CNRS Institut de la Vision Paris France Department of Adaptive Machine Systems Osaka University Osaka Japan Department of Computer Science University of Cergy-Pontoise Cergy-Pontoise France Department of Physics and Astronomy College of Charleston Charleston SC 29424 USA School of Physics Faculty of Science University of Sydney Sydney NSW 2006 Australia Center of Excellence for Integrative Brain Function Australian Research Council Sydney Australia Max Planck Institute for Human Cognitive and Brain Sciences Saxony Lei

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Classification of power quality considering voltage sags occurred in feeders

Classification of power quality considering voltage sags occ...

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5th International Joint Conference on Computational Intelligence, IJCCI 2013

作者： Góes, Anderson Roges Teixeira Steiner, Maria Teresinha Arns Neto, Pedro José Steiner Graduate Programs in Numerical Methods in Engineering Federal University of Paraná Centro Politécnico CP: 19081 CEP: 81531-990 Curitiba PR Brazil Graduate Program in Industrial and Systems Engineering Pontifical Catholic University of Paraná Rua Imaculada Conceição 1155 Prado Velho CEP: 80.215-901 Curitiba PR Brazil Numerical Methods in Engineering and Industrial Engineering Federal University of Paraná Centro Politécnico CP: 1908 CEP: 81531-990 Curitiba PR Brazil Graduate Programs in Business Administration Federal University of Paraná Av. Pref. Lothario Meissner 632 CEP: 80210-170 Curitiba PR Brazil

ISBN: (纸本)9789898565778

In this paper we propose a methodology to classify Power Quality for feeders, based on sags and by the use of KDD technique, establishing a quality level printed in labels. To support the methodology, it was applied to feeders on a substation located in Curitiba, Paraná, Brazil, based on attributes such as sag length, duration and frequency (number of occurrences on a given period of time). In the search for feeders quality classification, on the Data Mining stage, the main stage on KDD process, three different techniques were used in a comparatively way for pattern recognition: Artificial Neural Networks, Support Vector Machines an Genetic Algorithms. Those techniques presented acceptable results in classification feeders with no possible classification using a simplified method based on maximum number of sags. Thus, by printing the label with information and Quality level, utilities companies can get better organized for mitigation procedures, by establishing clear targets.

关键词： Pattern recognition

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Secondary motion in turbulent flows over superhydrophobic surfaces 8

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8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013

作者： Hasegawa, Yosuke Tuerk, Sebastian Stroh, Alexander Daschiel, Getraud Frohnapfel, Bettina Institute of Industrial Science University of Tokyo Komaba 4-6-1 Meguro-ku Tokyo153-8505 Japan Graduate School of Computational Engineering Numerical Methods in Mechanical Engineering Technical University of Darmstadt Dolivostr. 15 Darmstadt64293 Germany Institute of Fluid Mechanics Karlsruhe Institute of Technology Kaiserstr. 10 Karlsruhe76131 Germany

ISBN: (纸本)9780000000002

We investigate the effects of superhydrophobic surface carrying streamwise micro grooves on the flow dynamics and the resultant gain in the flow rate in a fully developed turbulent channel flow under a constant pressure gradient. The superhydrophobic surface is modeled as a flat boundary with alternating no-slip and slip conditions, and a series of direct numerical simulations is performed with systematically changing the spanwise periodicity of the streamwise grooves. It is observed that the alternating no-slip and slip boundary conditions cause a spanwise inhomogeneity of the Reynolds shear stress near the superhydrophobic surface, and consequently generate Prandtl's second kind of secondary flow characterized by coherent streamwise vortices. Accordingly, the instantaneous turbulent flow is decomposed into the spatial-mean, coherent and random components. The detailed turbulent statistics of the three components are obtained and the effect of the secondary flow on the resultant drag reduction is discussed.

关键词： Secondary flow

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A new adaptive mesh generation strategy for structural shape optimization problems using evolutionary algorithms

A new adaptive mesh generation strategy for structural shape...

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5th International Conference on engineering Computational Technology, ECT 2006

作者： Bugeda, G. Ródenas, J.J. Pahl, E. Oñate, E. Universitary School of Industrial Technical Engineering of Barcelona EUETIB-UPC Spain Research Center on Vehicles Technology Department of Mechanical and Materials Engineering Polytechnic University of Valencia Spain International Center for Numerical Methods in Engineering CIMNE-UPC Barcelona Spain

ISBN: (纸本)1905088094

The use of evolutionary methods in structural shape optimization requires the structural analysis of an important number of different designs, this making the computational cost of the analysis of each design a critical issue. Each design must be analyzed at a minimum computational cost but ensuring a minimum quality of the results using adapted meshes. Nevertheless, with meshes, obtained from traditional adaptive remeshing strategies, each design is analyzed more than once causing a high computational cost. This work presents a strategy to generate an adapted mesh for each design without the necessity of a full adaptive remeshing procedure for each design. It is based on the use of sensitivity analysis of all magnitudes related with adaptive remeshing (location of nodes, error estimation, ...) with respect to the design variables. The sensitivity analysis is performed only once over a reference geometry and then used to project the results to all other designs to be analyzed. An appropriate adapted mesh is thus generated for each new design in one shot, greatly reducing the computational cost compared with standard strategies. © 2006 Civil-Comp Press.

关键词： Sensitivity analysis

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Experimental investigation of surfactant-enhanced dissolution of residual NAPL in saturated soil

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GROUND WATER MONITORING AND REMEDIATION 1997年第4期17卷 89-98页

作者： Chevalier, LR Masten, SJ Wallace, RB Wiggert, DC Dr. Susan J. Mastenis an associate professor of environmental engineering in the Department of Civil and Environmental Engineering at Michigan State University (East Lansing MI 48824–1326 517/353-8539). She received a B.S. in biochemistry from Fairleigh Dickinson University an M.S.E. in environmental engineering from West Virginia University and a Ph.D. in environmental engineering from Harvard University. Prior to locating at MSU Dr. Masten conducted research at EAWAG-ETH Zurich Switzerland at the University of Melbourne Melbourne Australia and at the R.S. Kerr U.S. EPA Laboratory in Ada Oklahoma. Her research is focused on using chemical oxidation processes to remediate ground water and soils that are contaminated with organic chemicals. She also has extensive experience in the area of analytical chemistry. Professor David C. Wiggert'scurrent research interests in the area of environmental fluid mechanics are associated with ground water remediation. He is involved in experimental testing field studies and modeling of bioremediation of contaminants in ground water and in the application of innovative techniques to enhance the delivery of chemicals microbes and nutrients into contaminated soils to enhance in situ remediation. Recently completed projects dealt with the formation and performance of frozen containment barriers and the natural remediation properties of an industrial ground water recharge pond. Past research includes analysis of ground water flow in relation to water quality improvement and hydrologic and water quality studies of small watersheds. He is also actively researching fluid transients associated with free-surface flows and with pipeline systems specific topics include fluid-structure interaction and uncertainty analysis. Professor Roger B. Wallace'sresearch involves the mechanics of fluids in porous media. Current research focuses on contaminant transport and remediation in ground water systems including the role of nonaqueous phase liquids such as gasoline. This includes ex

Nonaqueous phase liquid (NAPL) is a longterm source of ground water contamination as the pollutant slowly partitions into the air and water phases. The objective of this work was to study the efficacy of aqueous surfactant solution to enhance the dissolution of a residual NAPL below the capillary fringe, hence reducing the time needed for aquifer restoration. An analytical technique was developed to measure the concentration of NAPL in a nonionic surfactant. Soil column experiments simulated conditions in the saturated soil where a NAPL may become trapped as a discontinuous immobile phase. Experimental results indicate that dissolution was a rate-limited process, approaching equilibrium concentrations after 24 hours. The relative permeability of the aqueous phase initially decreased as surfactant was injected, but increased over time as the saturation of residual NAPL was reduced through mass transfer into the surfactant-enhanced aqueous phase. These findings suggest that enhancing the aqueous phase with a nonionic surfactant may significantly enhance the in situ recovery or residual NAPL.

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PARALLEL AND DISTRIBUTED TLM COMPUTATION WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

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INTERNATIONAL JOURNAL OF numerical MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

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