2,801 research outputs found
Mimesis : Interactive interface for mass-interaction modeling
International audienceWhile 3D graphics software and 3D shapes modeling developed considerably, there is still a need for integrated physics-based tools. This would ideally require an integrated, coherent, usable, generic, physical modeling formalism, and a dedicated software, preferably to a collection of one shot models or animation techniques. This article introduces MIMESIS, a end-user software based on mass-interaction modeling. In MIMESIS, the mass-interaction paradigm (and, more generally, animation) is the core of the creation process at hand. It joins together a comprehensible, user-friendly modeler, various simulators, various coating means for visualizing synthesized movements and a growing set of pedagogical examples and library of models
Computer model calibration with large non-stationary spatial outputs: application to the calibration of a climate model
Bayesian calibration of computer models tunes unknown input parameters by
comparing outputs with observations. For model outputs that are distributed
over space, this becomes computationally expensive because of the output size.
To overcome this challenge, we employ a basis representation of the model
outputs and observations: we match these decompositions to carry out the
calibration efficiently. In the second step, we incorporate the non-stationary
behaviour, in terms of spatial variations of both variance and correlations, in
the calibration. We insert two integrated nested Laplace
approximation-stochastic partial differential equation parameters into the
calibration. A synthetic example and a climate model illustration highlight the
benefits of our approach
Non-stationary Gaussian Process Surrogates
We provide a survey of non-stationary surrogate models which utilize Gaussian
processes (GPs) or variations thereof, including non-stationary kernel
adaptations, partition and local GPs, and spatial warpings through deep
Gaussian processes. We also overview publicly available software
implementations and conclude with a bake-off involving an 8-dimensional
satellite drag computer experiment. Code for this example is provided in a
public git repository.Comment: 13 pages, 5 figure
A Generalized Discrete Event System (G-DEVS) Flattened Simulation Structure: Application to High-Level Architecture (HLA) Compliant Simulation of Workflow
International audienceThe objective of the paper is to specify a new flattened Generalized Discrete Event System simulation engine structure and the Workflow modeling and simulation environment embedding it. We express first the new flattened simulation structure and give the corresponding transformation functions. We analyze performance tests conducted on this new simulation structure to measure its efficiency. Then, having selected the essential concepts in the elaboration of the Workflow, we present a language of description to define the Workflow processes. Finally, we define a distributed Workflow Reference Model that interfaces components of the Workflow with respect to the High-Level Architecture standard. Today enterprises can take advantage of this platform in the context of networking where interoperability, flexibility, and efficiency are challenging concepts
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