Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"metamodels"”.
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Use of Response Surface Metamodels in Damage Identification of Dynamic Structures
… degree of accuracy. Response surface metamodels (RSMs) are proposed to fill this need. Popular in the fields of chemical and industrial engineering, RSMs have only recently been applied in the field of structural dynamics and to date there have been no studies which fully demonstrate …
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An advanced traceability schema as a baseline to improve supporting lifecycle processes
… common way to cope with this fact is the use of metamodels to underpin methodologies. However, current traceability metamodels still have serious limitations. Concerning methodologies in general, three hierarchical layered levels have been identified: metamodel, methodology and project. Current …
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Automated Metamodel Instance Generation Satisfying Quantitative Constraints
Metamodels are the core of the metamodeling approach and widely used in model driven architecture. The high abstraction level provided by metamodels makes the metamodeling approach popular among software modelers and language designers. However, the metamodeling approach has one big drawback: it …
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Modular Verification of Hierarchical Component-Based Software Systems
… we expand on current component-port-connector metamodels for formally specifying a system's architectural and behavioural requirements into a hierarchical component system structure by using abstract Composite Components. The Composite Components of a system model can then utilize modular …
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Metamodeling Driven IP Reuse for System-on-chip Integration and Microprocessor Design
… languages, which are themselves described by metamodels, and the transformation and processing of models in such languages are also described by metamodels. This makes machine based interpretation and translation from these models an easier and formal task. In part I, we consider the problem …
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Urban-scale impacts on the global-scale composition and climate effects of anthropogenic aerosols
… performed, to observe the response of the 16 metamodels (4 different meteorologies and 4 different urban types) to a broad set of potential inputs. These results were compared with observations of 03, CO, formaldehyde, BC, and PM10 from a few well observed urban areas, and in most of the …
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Uncertainty and sensitivity analysis for long-running computer codes : a critical review
… number (e.g., several thousands) of simulations, metamodels are recognized as a necessary compromise when UA and SA must be performed with long-running (i.e., several hours or days per simulation) computational models. This thesis discusses the use of polynomial Response Surfaces (RS), Artificial …
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ArchiSmartCity: Modelling the Alignment of Services and Information in Smart City Architectures
… is an absence of such concepts in languages and metamodels for Enterprise Modelling. These architectures and metamodels mostly emphasize technical aspects that constitute Smart Cities and they rarely focus on city services and their strategic aspects towards delivering the cities vision and …
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Performance modeling and analysis of parallel processing and low earth orbit satellite communication systems
… types of communication systems, mathematical metamodels [Agr85] are developed to capture the effects on packet delay caused by incremental changes in network dependent parameters. Part I of this research performs average packet delay and buffer cost comparisons of the augmented shuffle …
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Formal Verification of Relational Model Transformations using an Intermediate Verification Language
… language. Our framework encapsulates an EMF metamodels library and an OCL library within Boogie. The result is reduced cost and time required for a verifier’s construction. Furthermore, VeriMTLr includes an ASM and EMFTVM bytecode library, enabling an automated translation validation approach …
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Metamodel-based inverse uncertainty quantification of nuclear reactor simulators under the Bayesian framework
… we used systematically and rigorously developed metamodels based on stochastic spectral techniques and Gaussian Processes (also known as Kriging) emulators. We demonstrated the developed methodology based on three problems with different levels of sophistication: (1) Point Reactor Kinetics …
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Selection of pure error generators for simulation experiments
… these procedures are very useful for estimating metamodels, the application of many statistical analysis techniques is inappropriate unless the analyst is assured that a pure error component is present in the response. Crenshaw and Tew have demonstrated the absence of pure error in experiments in …
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A Design Space Exploration Process for Large Scale, Multi-Objective Computer Simulations
… set of good partitions for creating partitioned metamodels of large scale systems. The new hierarchically partitioned metamodeling scheme, the lumped parameter model (LPM), was developed to address two primary limitations to the current partitioning methods for large scale metamodeling. First the …
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Fundamental aerosol-cloud interactions and their influence on the aerosol indirect effect on climate
… we develop a framework for building efficient metamodels of activation, which greatly reduce the mean error in droplet number predicted across regimes. The biases in these parameterizations raise questions the influence of activation on the indirect effect. Using different schemes, we calculate …
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Nonparametric metamodeling for simulation optimization
… runs is high. The literature suggests the use of metamodels to synthesize the response surface using sample data. In particular, nonparametric regression is proposed as a useful tool in the global optimization of a response surface. As the general simulation optimization problem is very difficult …
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Accelerated optimisation methods for low-carbon building design
… optimization, Kriging, meta-models, metamodels, low-energy design ! "2 calculated without a dynamic simulation in order to filter out designs that do not meet constraints in those objectives and focus the use of computationally expensive dynamic simulations on feasible designs. Both …
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Applying Graph Theory to Conservation Documentation
… through the creation and analysis of graph-based metamodels and knowledge graphs. Conservation treatment data provided by The National Archives (UK) was used to develop a labelled property graph model and database that was also convertible to CIDOC CRM-mapped RDF triples. To further inform the …
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Modelling the Holocene evolution of coastal gullies on the Isle of Wight
… model parameters by using reduced complexity 'metamodels' to analyse the full model parameter space and thus constrain sources of uncertainty and plausible retrodicted scenarios more effectively. This study applies the developed techniques to a case study focused on a specific set of coastal …
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Using Model Driven Engineering to Reliably Automate the Measurement of Object-Oriented Software
… approaches for analysing and testing metamodels, metamodel-based software and model transformations.
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Multidelity methods for multidisciplinary system design
… or coarser discretizations, or creating direct metamodels such as response surfaces or reduced order models. This thesis offers solutions to two challenges in multidisciplinary system design optimization: developing optimization methods that use the high-fidelity analysis as little as possible …
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