127,618 Hits in 10.4 sec

Thin Porous Media

Lilit Yeghiazarian, Krishna Pillai, Rodrigo Rosati
2016 Transport in Porous Media  
The computational challenge of dealing with the very large network of the fine layer was approached with extrapolation methods based on data available on smaller networks.  ...  Interestingly, the material properties of the pore network realizations, i.e., pore size distribution, contact angle, and thickness, were based on independent measurements of the porous materials tested  ... 
doi:10.1007/s11242-016-0793-9 fatcat:mkfayd75nvb4pie6bjcdraxsvm

Petri Nets—A Versatile Modeling Structure

Miryam Barad
2016 Applied Mathematics  
To approach time-based evaluation of system performances, Timed Petri Nets (TPNs) were introduced. Modeling the notion of time is not straightforward.  ...  This paper reviews several published examples where Petri Nets were used in different circumstances such as estimating expected utilization of processing resources at steady state in open queueing networks  ...  In open queueing networks, customers enter and leave the network in an unconstrained manner.  ... 
doi:10.4236/am.2016.79074 fatcat:gpg7emoym5b55bueyar4qrx2pi

Accounting and Modeling as Design Metaphors for CEMIS [chapter]

Andreas Moeller
2013 Environmental Science and Engineering  
of already existing modeling approaches (Sequential Modular Approach in case of Material Flow Networks) • Modeling and planning of complex industrial metabolism (Eco-Industrial Parks, Verbund-Production  ...  processes are effective, if they prepare the formalization steps*: -Tools as long-term customizing instruments -Transfer of structures (e.g. material flow networks as an accounting system) -Substitution  ... 
doi:10.1007/978-3-642-36011-4_10 dblp:conf/itee/Moeller13 fatcat:vsz5xu55uvfulh3jibaf2c5gjq

Simulation and optimization of material and energy flow systems

Andreas Moeller, Martina Prox, Mario Schmidt, Hendrik Lambrecht
2009 Proceedings of the 2009 Winter Simulation Conference (WSC)  
Material flow analysis (MFA) becomes more and more an important instrument to support environmental protection and sustainable development.  ...  Based on the industrial ecology or industrial metabolism paradigm (Fischer-Kowalski 1998, Fischer-Kowalski and Hüttler 1999), we interpret material flow analysis in a broader sense.  ...  In this regard, we recommend the material flow network approach. Material flow networks are based on Petri Nets. They are used to represent period-oriented material and energy flows and stocks.  ... 
doi:10.1109/wsc.2009.5429292 dblp:conf/wsc/MoellerPSL09 fatcat:tm5gxb6mmnezbdgsoij5pk3iza


M. Derya Tetiker, Eric Tatara, Michael North, Fouad Teymour, Ali Cinar
2007 IFAC Proceedings Volumes  
One such problem is product grade transitions in distributed process.  ...  The framework proposed earlier (Tetiker, 2006a) is extended by adding several layers of agents to control species percentage distribution in autocatalytic reactor networks.  ...  The system is operated with constant volume, thus, constraint equations are formulated on the reactor flow rates to ensure that material is conserved.  ... 
doi:10.3182/20070606-3-mx-2915.00148 fatcat:vezx2fnoy5h2jpgkq3vatxtaze

On the Zener–Hollomon Parameter, Multi-Layer Perceptron and Multivariate Polynomials in the Struggle for the Peak and Steady-State Description

Petr Opěla, Petr Kawulok, Ivo Schindler, Rostislav Kawulok, Stanislav Rusz, Horymír Navrátil
2020 Metals  
In the presented research, Zener–Hollomon-based relations, multi-layer perceptron networks and multivariate polynomials are employed to describe the peak and steady-state coordinates of an Invar 36 flow  ...  Description of flow stress evolution, specifically an approximation of a set of flow curves acquired under a wide range of thermomechanical conditions, of various materials is often solved via so-called  ...  The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.  ... 
doi:10.3390/met10111413 fatcat:4ola52nq2jhv3oo6yvzyt4doce

Spontaneous oscillations and negative-conductance transitions in microfluidic networks

Daniel J. Case, Jean-Régis Angilella, Adilson E. Motter
2020 Science Advances  
This network is shown to exhibit oscillatory output patterns, bistable flow states, hysteresis, signal amplification, and negative-conductance transitions, all without reliance on dedicated external control  ...  The tendency for flows in microfluidic systems to behave linearly poses challenges for designing integrated flow control schemes to carry out complex fluid processing tasks.  ...  Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials.  ... 
doi:10.1126/sciadv.aay6761 pmid:32426493 pmcid:PMC7220308 fatcat:627ytyrllbemhbtlr7fiss3wjy

Information Systems for Industrial Environmental Management [chapter]

L. M. Hilty
1995 Environmental Informatics  
Printed in the Netherlands.  ...  Environmental management needs to be supported by computer-aided environmental information and management (CAEM) systems.  ...  of a transition, or material flows in an arrow.  ... 
doi:10.1007/978-94-017-1443-3_21 fatcat:t3cxyfpgrncgjilrw32cqyjtx4

Cellular Automata in Complex Matter

Dominique Désérable, Laboratoire de Génie Civil & Génie Mécanique, France, Pascal Dupont, Mustapha Hellou, Siham Kamali-Bernard, Laboratoire de Génie Civil & Génie Mécanique, Franc
2011 Complex Systems  
The final section is a unified subset of hybrid models including a neural approach in reaction/diffusion, an environment dealing with the rheology of composite pastes, and movable CAs.  ...  According to Toffoli's "rather than" paradigm, CAs are the outstanding alternative to finding the ordinary (ODE) or partial (PDE) differential equation of a phenomenon in complex matter [2] .  ...  Acknowledgments A short version of this paper appeared in Parallel Computing Technologies, Ninth International Conference PaCT 2007, Lecture Notes in Computer Science 4671.  ... 
doi:10.25088/complexsystems.20.1.67 fatcat:tmk7vgqazbatjds474lmbbenyq

Failure mechanisms in polyolefines: The role of crazing, shear yielding and the entanglement network

Rudy A.C. Deblieck, D.J.M. van Beek, Klaas Remerie, Ian M. Ward
2011 Polymer  
Valid strategies for increasing the crack propagation resistance in polyolefines are reviewed. Finally an outlook for further research to complement the present knowledge base is formulated.  ...  The important role of the underlying molecular entanglement network in this approach is reflected by the strain hardening behaviour which is shown to be a robust measure for predicting slow crack growth  ...  Acknowledgements Dr Victor Litvinov is acknowledged for discussion on the physical nature of the molecular entanglement network.  ... 
doi:10.1016/j.polymer.2011.03.055 fatcat:5xed3dd2q5bqxnzr2kgjoo54py

Temperature Effects on Crack Tip Plasticity in Polymers [chapter]

E. Van Der Giessen, J. Lai
1999 Solid Mechanics and its Applications  
It is shown that self-heating can raise the temperature in SAN sufficiently high locally to reach the glass transition temperature.  ...  The crack tip fields in amorphous glassy polymers are distinctly different from that in metals, and are associated with the initiation and propagation of shear bands.  ...  By imposing the reasonable side condition that the network 'breaks down' when the glass transition is approached, we find that these parameters need to satisfy Small-scale yielding problem Following  ... 
doi:10.1007/0-306-46936-7_16 fatcat:5h3rlzchtbfl3egujei7gyhp5i

Viscosity and Glass Transition in Amorphous Oxides

Michael I. Ojovan
2008 Advances in Condensed Matter Physics  
An overview is given of amorphous oxide materials viscosity and glass-liquid transition phenomena.  ...  A compendium of viscosity models is given including recent data on viscous flow model based on network defects in which thermodynamic parameters of configurons—elementary excitations resulting from broken  ...  The configuron model of glass transition gives an explicit equation of glass-transition temperature (29) and demonstrates characteristic jumps in specific heat and thermal expansion.  ... 
doi:10.1155/2008/817829 fatcat:hu62ts7bgndjzh2p2hsuathjaq

Configurons: Thermodynamic Parameters and Symmetry Changes at Glass Transition

Michael Ojovan
2008 Entropy  
Thermal history effects in the glass-liquid transition are interpreted in terms of configuron relaxation.  ...  Thermodynamic parameters of configurons -elementary excitations resulting from broken bonds in amorphous materials -are found from viscosity-temperature relationships.  ...  The decrease in free volume while approaching the glass transition temperature gives an explanation for the increase of viscosity while approaching it.  ... 
doi:10.3390/e10030334 fatcat:3to6q5cd2vfdrmi5iojm5rcsm4

PCDM: a decision support modeling methodology for supply chain, product and process design decisions

Jennifer Blackhurst, Tong Wu, Peter O'Grady
2005 Journal of Operations Management  
The proposed methodology, called Product Chain Decision Model (PCDM), is presented in this paper. This uses an abstracted network to model supply chain systems.  ...  Finally, an industry example of joint supply chain and product design is described to illustrate the application of PCDM. #  ...  An alternative pure modeling approach, namely network-based approaches, is described in the following section.  ... 
doi:10.1016/j.jom.2004.05.009 fatcat:zuitnvpzpnd53fds3s5tz64b7u

Design of a Domain-Specific Language for Material Flow Analysis Using Microsoft DSL Tools

Bahram Zarrin, Hubert Baumeister
2014 Proceedings of the 14th Workshop on Domain-Specific Modeling - DSM '14  
In this paper we propose a Domain-Specific Language (DSL) to model MFA in a waste management modeling context.  ...  Material Flow Analysis (MFA) is the procedure of measuring and assessing the mass flows of matter (solid waste, water, food...) and substances (carbon, phosphorus ...) within a process or a system for  ...  In contrast, we propose a specific material-flow analysis tool in the context of waste-management, and we use a model-driven and language-oriented approach to address the problem.  ... 
doi:10.1145/2688447.2688452 fatcat:t73ylk7rlfdgxal6ckcattg3ky
« Previous Showing results 1 — 15 out of 127,618 results