Metamodel selection based on stepwise regression
Abstract Metamodels are often used to replace expensive simulations of engineering problems. When a training set is given, a series of metamodels can be constructed, and then there are two strategies to deal with these metamodels: (1) picking out the best one with the highest accuracy as an approxim...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zhou, XiaoJian [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag Berlin Heidelberg 2016 |
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| Übergeordnetes Werk: |
Enthalten in: Structural and multidisciplinary optimization - Springer Berlin Heidelberg, 2000, 54(2016), 3 vom: 25. Apr., Seite 641-657 |
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| Übergeordnetes Werk: |
volume:54 ; year:2016 ; number:3 ; day:25 ; month:04 ; pages:641-657 |
| Links: |
|---|
| DOI / URN: |
10.1007/s00158-016-1442-1 |
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| Katalog-ID: |
OLC2051781788 |
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| 520 | |a Abstract Metamodels are often used to replace expensive simulations of engineering problems. When a training set is given, a series of metamodels can be constructed, and then there are two strategies to deal with these metamodels: (1) picking out the best one with the highest accuracy as an approximation of the computationally intensive simulation; and (2) combining all of them into an ensemble model. However, since the choice of approximate model depends on design of experiments (DOEs), employing of the first strategy thus increases the risk of adopting an inappropriate model. Nevertheless, the second strategy also seems not to be a good choice, since adding redundant metamodels may lead to loss of accuracy. Therefore, it is a necessary step to eliminate the redundant metamodels from the set of the candidates before constructing the final ensemble. Illuminated by the method of variable selection widely used in polynomial regression, a metamodel selection method based on stepwise regression is proposed. In our method, just a subset of n ones (n ≤ p, where p is the number of all of the candidate metamodels) is used. In addition, a new ensemble technique is proposed from the view of polynomial regression in this work. This new ensemble technique, combined with metamodel selection method, has been evaluated using six benchmark problems. The results show that eliminating the redundant metamodels before constructing the ensemble can provide more ideal prediction accuracy than directly constructing the ensemble by utilizing all of the candidates. | ||
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Metamodel selection based on stepwise regression |
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Metamodel selection based on stepwise regression |
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Zhou, XiaoJian |
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Structural and multidisciplinary optimization |
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metamodel selection based on stepwise regression |
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Metamodel selection based on stepwise regression |
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Abstract Metamodels are often used to replace expensive simulations of engineering problems. When a training set is given, a series of metamodels can be constructed, and then there are two strategies to deal with these metamodels: (1) picking out the best one with the highest accuracy as an approximation of the computationally intensive simulation; and (2) combining all of them into an ensemble model. However, since the choice of approximate model depends on design of experiments (DOEs), employing of the first strategy thus increases the risk of adopting an inappropriate model. Nevertheless, the second strategy also seems not to be a good choice, since adding redundant metamodels may lead to loss of accuracy. Therefore, it is a necessary step to eliminate the redundant metamodels from the set of the candidates before constructing the final ensemble. Illuminated by the method of variable selection widely used in polynomial regression, a metamodel selection method based on stepwise regression is proposed. In our method, just a subset of n ones (n ≤ p, where p is the number of all of the candidate metamodels) is used. In addition, a new ensemble technique is proposed from the view of polynomial regression in this work. This new ensemble technique, combined with metamodel selection method, has been evaluated using six benchmark problems. The results show that eliminating the redundant metamodels before constructing the ensemble can provide more ideal prediction accuracy than directly constructing the ensemble by utilizing all of the candidates. © Springer-Verlag Berlin Heidelberg 2016 |
| abstractGer |
Abstract Metamodels are often used to replace expensive simulations of engineering problems. When a training set is given, a series of metamodels can be constructed, and then there are two strategies to deal with these metamodels: (1) picking out the best one with the highest accuracy as an approximation of the computationally intensive simulation; and (2) combining all of them into an ensemble model. However, since the choice of approximate model depends on design of experiments (DOEs), employing of the first strategy thus increases the risk of adopting an inappropriate model. Nevertheless, the second strategy also seems not to be a good choice, since adding redundant metamodels may lead to loss of accuracy. Therefore, it is a necessary step to eliminate the redundant metamodels from the set of the candidates before constructing the final ensemble. Illuminated by the method of variable selection widely used in polynomial regression, a metamodel selection method based on stepwise regression is proposed. In our method, just a subset of n ones (n ≤ p, where p is the number of all of the candidate metamodels) is used. In addition, a new ensemble technique is proposed from the view of polynomial regression in this work. This new ensemble technique, combined with metamodel selection method, has been evaluated using six benchmark problems. The results show that eliminating the redundant metamodels before constructing the ensemble can provide more ideal prediction accuracy than directly constructing the ensemble by utilizing all of the candidates. © Springer-Verlag Berlin Heidelberg 2016 |
| abstract_unstemmed |
Abstract Metamodels are often used to replace expensive simulations of engineering problems. When a training set is given, a series of metamodels can be constructed, and then there are two strategies to deal with these metamodels: (1) picking out the best one with the highest accuracy as an approximation of the computationally intensive simulation; and (2) combining all of them into an ensemble model. However, since the choice of approximate model depends on design of experiments (DOEs), employing of the first strategy thus increases the risk of adopting an inappropriate model. Nevertheless, the second strategy also seems not to be a good choice, since adding redundant metamodels may lead to loss of accuracy. Therefore, it is a necessary step to eliminate the redundant metamodels from the set of the candidates before constructing the final ensemble. Illuminated by the method of variable selection widely used in polynomial regression, a metamodel selection method based on stepwise regression is proposed. In our method, just a subset of n ones (n ≤ p, where p is the number of all of the candidate metamodels) is used. In addition, a new ensemble technique is proposed from the view of polynomial regression in this work. This new ensemble technique, combined with metamodel selection method, has been evaluated using six benchmark problems. The results show that eliminating the redundant metamodels before constructing the ensemble can provide more ideal prediction accuracy than directly constructing the ensemble by utilizing all of the candidates. © Springer-Verlag Berlin Heidelberg 2016 |
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Metamodel selection based on stepwise regression |
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