Set-oriented multi objective optimal control of elliptic non-linear partial differential equations using POD objectives and gradient

Reichle, Lena

Set-oriented multi objective optimal control of elliptic non-linear partial differential equations using POD objectives and gradient

Dateien

Reichle_2-1h6pp1cxptbap6.pdfGröße: 2.19 MBDownloads: 288

Datum

2020

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Mathematik und Statistik

Publikationstyp

Masterarbeit/Diplomarbeit

Publikationsstatus

Published

Zusammenfassung

In this thesis we use the Reduced Basis (RB) method to sol- ve multiobjective optimization problems controlled by parameter dependent semilinear elliptic partial differential equations. First, we show the existence and uniqueness of solutions of the partial differential equations under con- sideration. Subsequently, we introduce the RB method to be able to signifi- cantly reduce the computational effort compared to standard approximation schemes like the Finite Element (FE) method. Here we work with the true error and an a-posteriori error estimator. In addition, we use the Discrete Empirical Interpolation method to solve the surrogate model independently of the dimension of the FE space so we can save even more computational effort. In the optimization step we use a set-oriented subdivision algorithm based on gradient calculations of the objective functions to solve the problem. To evaluate the objective functions and their gradients in the optimization step we use the surrogate model and through this we save a lot of compu- tational effort. In order to take inexactness of the gradients into account, e.g. caused by the surrogate model, we derive an additional condition for the descent direction. We prove the convergence with this new descent direction to a tight superset of the Pareto set in this thesis. Finally we examine our results using numerical examples.

Fachgebiet (DDC)

510 Mathematik

Zitieren

ISO 690

REICHLE, Lena, 2020. Set-oriented multi objective optimal control of elliptic non-linear partial differential equations using POD objectives and gradient [Master thesis]. Konstanz: Universität Konstanz

BibTex

@mastersthesis{Reichle2020Setor-49233,
  year={2020},
  title={Set-oriented multi objective optimal control of elliptic non-linear partial differential equations using POD objectives and gradient},
  address={Konstanz},
  school={Universität Konstanz},
  author={Reichle, Lena}
}

RDF

<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/49233">
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2020-04-21T07:15:27Z</dcterms:available>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/49233"/>
    <dcterms:issued>2020</dcterms:issued>
    <dcterms:abstract xml:lang="eng">In this thesis we use the Reduced Basis (RB) method to sol- ve multiobjective optimization problems controlled by parameter dependent semilinear elliptic partial differential equations. First, we show the existence and uniqueness of solutions of the partial differential equations under con- sideration. Subsequently, we introduce the RB method to be able to signifi- cantly reduce the computational effort compared to standard approximation schemes like the Finite Element (FE) method. Here we work with the true error and an a-posteriori error estimator. In addition, we use the Discrete Empirical Interpolation method to solve the surrogate model independently of the dimension of the FE space so we can save even more computational effort. In the optimization step we use a set-oriented subdivision algorithm based on gradient calculations of the objective functions to solve the problem. To evaluate the objective functions and their gradients in the optimization step we use the surrogate model and through this we save a lot of compu- tational effort. In order to take inexactness of the gradients into account, e.g. caused by the surrogate model, we derive an additional condition for the descent direction. We prove the convergence with this new descent direction to a tight superset of the Pareto set in this thesis. Finally we examine our results using numerical examples.</dcterms:abstract>
    <dcterms:title>Set-oriented multi objective optimal control of elliptic non-linear partial differential equations using POD objectives and gradient</dcterms:title>
    <dc:language>eng</dc:language>
    <dc:contributor>Reichle, Lena</dc:contributor>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/49233/3/Reichle_2-1h6pp1cxptbap6.pdf"/>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2020-04-21T07:15:27Z</dc:date>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/39"/>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/39"/>
    <dc:creator>Reichle, Lena</dc:creator>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/49233/3/Reichle_2-1h6pp1cxptbap6.pdf"/>
    <dc:rights>terms-of-use</dc:rights>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
  </rdf:Description>
</rdf:RDF>

Hochschulschriftenvermerk

Konstanz, Universität Konstanz, Masterarbeit/Diplomarbeit, 2020

Universitätsbibliographie

Ja