Výsledky vyhledávání - "Sebastian Farås"

A random sampling method for a family of Temple-class systems of conservation laws

Autor: Christophe Chalons, Raimund Bürger, Stefan Diehl, Sebastian Farås, Fernando Betancourt

Publikováno v: Numerische Mathematik
Numerische Mathematik, Springer Verlag, 2018, 138 (1), pp.37-73. ⟨10.1007/s00211-017-0900-z⟩

The Aw–Rascle–Zhang traffic model, a model of sedimentation, and other applications lead to nonlinear $$2 \times 2$$ systems of conservation laws that are governed by a single scalar system velocity. Such systems are of the Temple class since rar

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https://hal.uvsq.fr/hal-02169456

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Control of an ideal activated sludge process in wastewater treatment via an ODE–PDE model

Autor: Stefan Diehl, Sebastian Farås

Publikováno v: Journal of Process Control. 23:359-381

The activated sludge process (ASP), found in most wastewater treatment plants, consists basically of a biological reactor followed by a sedimentation tank, which has one inlet and two outlets. The purpose of the ASP is to reduce organic material and

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https://doi.org/10.1016/j.jprocont.2012.12.011

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A REDUCED-ORDER ODE–PDE MODEL FOR THE ACTIVATED SLUDGE PROCESS IN WASTEWATER TREATMENT: CLASSIFICATION AND STABILITY OF STEADY STATES

Autor: Sebastian Farås, Stefan Diehl

Publikováno v: Mathematical Models and Methods in Applied Sciences. 23:369-405

Most wastewater treatment plants contain an activated sludge process, which consists of a biological reactor and a sedimentation tank. The purpose is to reduce the incoming organic material and dissolved nutrients (the substrate). This is done in the

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https://doi.org/10.1142/s0218202512500509

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Modeling and controlling clarifier-thickeners fed by suspensions with time-dependent properties

Autor: Sebastian Farås, Fernando Betancourt, Stefan Diehl, Raimund Bürger

Publikováno v: Minerals Engineering
Artículos CONICYT
CONICYT Chile
instacron:CONICYT

A one-dimensional model of the process of continuous sedimentation in a clarifier–thickener unit is presented. The governing model is expressed as a system of two nonlinear partial differential equations for the solids volume fraction and the varyi

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Towards improved 1-D settler modelling : calibration of the Bürger model and case study

Autor: Sebastian Farås, Stefan Diehl, Pieter Vlasschaert, Ingmar Nopens, Elena Torfs, Youri Amerlink, Raimund Bürger

Publikováno v: Water Environment Federation, 86th Annual technical exhibition and conference, Papers
Scopus-Elsevier

Recently, Burger et al. (2011) developed a new 1-D SST model which allows for more realistic predictions of the sludge settling behaviour than traditional 1-D models used to date. However, the addition of a compression function in this new 1-D model

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https://biblio.ugent.be/publication/4234194

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A consistent modelling methodology for secondary settling tanks: a reliable numerical method

Autor: Sebastian Farås, Ingmar Nopens, Raimund Bürger, Elena Torfs, Stefan Diehl

Publikováno v: WATER SCIENCE AND TECHNOLOGY
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Transactions Of The American Mathematical Society

The consistent modelling methodology for secondary settling tanks (SSTs) leads to a partial differential equation (PDE) of nonlinear convection–diffusion type as a one-dimensional model for the solids concentration as a function of depth and time.

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Fundamental nonlinearities of the reactor-settler interaction in the activated sludge process

Autor: Sebastian Farås, Stefan Diehl

Publikováno v: Water science and technology : a journal of the International Association on Water Pollution Research. 66(1)

The activated sludge process can be modelled by ordinary and partial differential equations for the biological reactors and secondary settlers, respectively. Because of the complexity of such a system, simulation models are most often used to investi

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https://pubmed.ncbi.nlm.nih.gov/22678197

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On reliable and unreliable numerical methods for the simulation of secondary settling tanks in wastewater treatment

Autor: Stefan Diehl, Sebastian Farås, Ingmar Nopens, Raimund Bürger

Publikováno v: COMPUTERS & CHEMICAL ENGINEERING
Artículos CONICYT
CONICYT Chile
instacron:CONICYT

A one-dimensional model for the sedimentation-compression-dispersion process in the secondary settling tank can be expressed as a nonlinear strongly degenerate parabolic partial differential equation (PDE), which has coefficients with spatial discont

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Akademický článek

Raman spectrum matching with contrastive representation learning.

Autor: Li, Bo, Schmidt, Mikkel N., Alstrøm, Tommy S.

Publikováno v: Analyst; 5/21/2022, Vol. 147 Issue 10, p2238-2246, 9p

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