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dc.contributor.authorChugh, T
dc.date.accessioned2022-05-06T10:50:35Z
dc.date.issued2022-07-19
dc.date.updated2022-05-06T09:26:18Z
dc.description.abstractBayesian optimisation (BO) has been widely used to solve problems with expensive function evaluations. In multi-objective optimisation problems, BO aims to find a set of approximated Pareto optimal solutions. There are typically two ways to build surrogates in multi-objective BO: One surrogate by aggregating objective functions (by using a scalarising function, also called mono-surrogate approach) and multiple surrogates (for each objective function, also called multi-surrogate approach). In both approaches, an acquisition function (AF) is used to guide the search process. Mono-surrogate has the advantage that only one model is used, however, the approach has two major limitations. Firstly, the fitness landscape of the scalarising function and the objective functions may not be similar. Secondly, the approach assumes that the scalarising function distribution is Gaussian, and thus a closed-form expression of the AF can be used. In this work, we overcome these limitations by building a surrogate model for each objective function and show that the scalarising function distribution is not Gaussian. We approximate the distribution using Generalised extreme value distribution. The results and comparison with existing approaches on standard benchmark and real-world optimisation problems show the potential of the multi-surrogate approach.en_GB
dc.identifier.citationGECCO 2022: Genetic and Evolutionary Computation Conference, 9 - 13 July 2022, Boston, US, pp. 2143–2151en_GB
dc.identifier.doi10.1145/3520304.3533972
dc.identifier.urihttp://hdl.handle.net/10871/129532
dc.identifierORCID: 0000-0001-5123-8148 (Chugh, Tinkle)
dc.language.isoenen_GB
dc.publisherAssociation for Computing Machinery (ACM)en_GB
dc.rights© 2022 Copyright held by the owner/author(s). Publication rights licensed to ACM.
dc.subjectBayesian optimisationen_GB
dc.subjectSurrogate modellingen_GB
dc.subjectGaussian processen_GB
dc.subjectApproximate inferenceen_GB
dc.subjectBayesian Optimisationen_GB
dc.subjectUncertaintyen_GB
dc.titleMono-surrogate vs multi-surrogate in multi-objective bayesian optimisationen_GB
dc.typeConference paperen_GB
dc.date.available2022-05-06T10:50:35Z
dc.descriptionThis is the author accepted manuscript. The final version is available from ACM via the DOI in this recorden_GB
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserveden_GB
dcterms.dateAccepted2022-03-25
rioxxterms.versionAMen_GB
rioxxterms.licenseref.startdate2022-03-25
rioxxterms.typeConference Paper/Proceeding/Abstracten_GB
refterms.dateFCD2022-05-06T09:26:22Z
refterms.versionFCDAM
refterms.dateFOA2022-07-29T08:52:31Z
refterms.panelBen_GB


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