Searched for: subject%3A%22metamodel%22
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Krantz, Justus (author)
Variable density groundwater models are essential for managing coastal groundwater resources. However, their practical applicability can be questioned due to limited validation opportunities on long timescales associated with the development of fresh-saline distributions. This study addresses this challenge by applying upscaled metamodeling...
master thesis 2023
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Fransen, M.P. (author), Langelaar, Matthijs (author), Schott, D.L. (author)
In design optimization of bulk handling equipment (BHE) we generally focus on the mean performance of the equipment. However, granular materials behave stochastic due to irregularities in particle shape and size which leads to stochastic performance of the equipment. To include the stochastic performance we propose robust metamodel-based...
journal article 2023
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Kara, Abdullah (author), Rowland, Alexandra (author), van Oosterom, Peter (author), Stubkjær, Erik (author), Çağdaş, Volkan (author), Folmer, Erwin (author), Lemmen, Christiaan (author), Quak, Wilko (author), Meggiolaro, Laura (author)
A code list in Unified Modeling Language (UML), a simple list of values without any structure, can be employed as a simple data type to further capture the semantics of a domain. The code list values as used in international standards (e.g. ISO and OGC) are generally presented without definition, reference to the source of a definition, multi...
conference paper 2022
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Kara, A. (author), Rowland, Alexandra (author), van Oosterom, P.J.M. (author), Stubkjaer, Erik (author), Çağdaş, Volkan (author), Folmer, E (author), Lemmen, Christiaan (author), Quak, C.W. (author), Meggiolaro, Laura (author)
A code list in Unified Modeling Language (UML), a simple list of values without any structure, can be employed as a simple data type to further capture the semantics of a domain. The code list values as used in international standards (e.g. ISO and OGC) are generally presented without definition, reference to the source of a definition, multi...
conference paper 2022
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Teixeira, Rui (author), Martinez-Pastor, Beatriz (author), Nogal Macho, M. (author), O’Connor, Alan (author)
Different emerging threats highlighted the relevance of recovery and adaptation modelling in the functioning of societal systems. However, as modelling of systems becomes more complex, its effort increases challenging the practicality of the engineering analyses required for efficient recovery and adaptation. In the present work, metamodels...
journal article 2022
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Wang, Z. (author), Almeida, José Humberto S. (author), Ashok, Aravind (author), Wang, Zhonglai (author), Castro, Saullo G.P. (author)
Variable-angle filament-wound (VAFW) cylinders are herein optimized for minimum mass under manufacturing constraints, and for various design loads. A design parameterization based on a second-order polynomial variation of the tow winding angle along the axial direction of the cylinders is utilized to explore the nonlinear steering-thickness...
journal article 2022
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Fransen, M.P. (author), Langelaar, Matthijs (author), Schott, D.L. (author)
In calibration of model parameters for discrete element method (DEM) based models the focus lies on matching the mean key performance indicator (KPI) values from laboratory experiments to those from simulation results. However, due to the stochastic nature of granular processes experimental results can show large variances. To include...
journal article 2022
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Teixeira, Rui (author), Martinez-Pastor, Beatriz (author), Nogal Macho, M. (author), Micu, Alexandra (author), O'Connor, Alan (author)
Significant research has been conducted in identifying optimal recovery and adaptation decisions in disruptive scenarios using engineering models. In this context, an aspect that has been target of limited research is that of response times. Modelling is expected to grow progressively more complex as it becomes more accurate. Such complexity...
conference paper 2022
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van der Werf, Jilles (author)
Reliability analysis is a rational method for dealing with uncertainties. It is increasingly used for the design and assessment of (civil) structures. Reliability analysis, possibly in combination with performance data, allows for instance to update (extend) the lifetime of existing quay wall structures. This gives economic advantages when...
master thesis 2021
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Kentrop, Daniël (author)
The construction of a dike improvement often causes a decrease in reliability during construction. Raising a dike may give rise to excess pore water pressures in the subsoil, resulting in a temporal strength decrease. Observing the survival of such a loading condition might provide information on the strength of a dike. Therefore, this research...
master thesis 2021
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Teixeira, R. (author), O'Connor, A. (author), Nogal Macho, M. (author)
The present paper discusses the application principles of value of information theory in adaptive metamodeling for reliability analysis. Metamodeling for reliability purposes has become particularly relevant in recent years. The usage of metamodels allows surrogating the, costly to evaluate, performance functions of engineering structures....
conference paper 2021
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Fransen, M.P. (author), Langelaar, Matthijs (author), Schott, D.L. (author)
Developments in discrete element modelling (DEM) enable detailed modelling of granular flows in bulk handling equipment (BHE) but due to the computational expense of DEM, wide use in analysing equipment performance is not yet feasible. Metamodels are a viable option to effectively use DEM in analysing BHE performance. Metamodels are able to...
journal article 2021
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van den Eijnden, A.P. (author), Schweckendiek, T. (author), Hicks, M.A. (author)
A kriging-based metamodelling approach for analysing the structural reliability of a sheetpile wall in a dyke is formulated. This specific problem is characterised by high target reliabilities ((Formula presented.)) in combination with a noisy and incomplete numerical model response. Starting from the original formulation of active learning...
journal article 2021
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Teixeira, Rui (author), Nogal Macho, M. (author), O'Connor, Alan (author)
The present work reviews the implementation of adaptive metamodeling for reliability analysis with emphasis in four main types of metamodels: response surfaces, polynomial chaos expansions, support vector machines, and Kriging models. The discussion presented is motivated by the identified spread and little interaction between metamodeling...
journal article 2021
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Teixeira, Rui (author), Martinez-Pastor, Beatriz (author), Nogal Macho, M. (author), O'Connor, Alan (author)
The present work discusses an innovative approach to metamodeling in reliability that uses a field-transversal rationale. Adaptive metamodeling in reliability is characterized by its large spectra of models and techniques with different assumptions. As a result, the reliability engineer is frequently faced with the highly challenging task of...
journal article 2021
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Wang, Z. (author), Almeida, José Humberto S. (author), St-Pierre, Luc (author), Wang, Zhonglai (author), Castro, Saullo G.P. (author)
A reliability-based optimization framework is introduced and used to design filament-wound cylindrical shells with variable angle tow. Seven design cases are investigated to enable a comparison between constant-stiffness and variable angle tow designs, also considering effects of thickness variation created due to overlapping tow paths,...
journal article 2020
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Teixeira, Rui (author), Nogal Macho, M. (author), O'Connor, Alan (author), Martinez-Pastor, Beatriz (author)
Reliability assessment with adaptive Kriging has gained notoriety due to the Kriging capability of accurately replacing the performance function while performing as a self-improving function for learning procedures. Recent works on adaptive Kriging pursued to improve the efficiency of the active learning through the application of distinct...
journal article 2020
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Chen, X (author), Osorio, C. (author), Santos, Bruno F. (author)
This paper addresses a travel time reliable signal control problem. Travel time distributional estimates are obtained from a stochastic microscopic traffic simulator. The estimates are embedded within a simulation-based optimization algorithm. Analytical approximations of the simulated metrics are combined with the simulated data in order to...
journal article 2019
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Rueda, Ana (author), Cagigal, Laura (author), Pearson, S.G. (author), Antolínez, Jose A.A. (author), Storlazzi, Curt (author), van Dongeren, Ap (author), Camus, Paula (author), Mendez, Fernando J. (author)
Wave-induced flooding is a major coastal hazard on tropical islands fronted by coral reefs. The variability of shape, size, and physical characteristics of the reefs across the globe make it difficult to obtain a parameterization of wave run-up, which is needed for risk assessments. Therefore, we developed the HyCReWW metamodel to predict wave...
journal article 2019
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Cligge, Martijn (author)
Although aligning business models with enterprise architecture concepts can provide insights into business model implementation aspects, current approaches that facilitate business model enterprise architecture have several limitations: they often lack a network perspective, facilitate one level analysis of the business model implementation, are...
master thesis 2017
Searched for: subject%3A%22metamodel%22
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