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Artykuły w czasopismach na temat "Multifidelity techniques"
De Breuck, Pierre-Paul, Grégoire Heymans i Gian-Marco Rignanese. "Accurate experimental band gap predictions with multifidelity correction learning". Journal of Materials Informatics 2, nr 3 (2022): 10. http://dx.doi.org/10.20517/jmi.2022.13.
Pełny tekst źródłaZanoni, Andrea, Gianluca Geraci, Matteo Salvador, Karthik Menon, Alison L. Marsden i Daniele E. Schiavazzi. "Improved multifidelity Monte Carlo estimators based on normalizing flows and dimensionality reduction techniques". Computer Methods in Applied Mechanics and Engineering 429 (wrzesień 2024): 117119. http://dx.doi.org/10.1016/j.cma.2024.117119.
Pełny tekst źródłaTsilifis, Panagiotis, Piyush Pandita, Sayan Ghosh i Liping Wang. "Multifidelity Model Calibration in Structural Dynamics Using Stochastic Variational Inference on Manifolds". Entropy 24, nr 9 (13.09.2022): 1291. http://dx.doi.org/10.3390/e24091291.
Pełny tekst źródłaSen, Oishik, Nicholas J. Gaul, K. K. Choi, Gustaaf Jacobs i H. S. Udaykumar. "Evaluation of multifidelity surrogate modeling techniques to construct closure laws for drag in shock–particle interactions". Journal of Computational Physics 371 (październik 2018): 434–51. http://dx.doi.org/10.1016/j.jcp.2018.05.039.
Pełny tekst źródłaRaven, Hoyte C., i Joy Klinkenberg. "Practical ship afterbody optimization by multifidelity techniques". Ship Technology Research, 21.11.2023, 1–18. http://dx.doi.org/10.1080/09377255.2023.2275371.
Pełny tekst źródłaTejero, Fernando, David MacManus, Josep Hueso-Rebassa, Francisco Sanchez-Moreno, Ioannis Goulos i Christopher Sheaf. "Aerodynamic optimisation of civil aero-engine nacelles by dimensionality reduction and multi-fidelity techniques". International Journal of Numerical Methods for Heat & Fluid Flow, 30.09.2022. http://dx.doi.org/10.1108/hff-06-2022-0368.
Pełny tekst źródłaTakeno, Shion, Hitoshi Fukuoka, Yuhki Tsukada, Toshiyuki Koyama, Motoki Shiga, Ichiro Takeuchi i Masayuki Karasuyama. "A Generalized Framework of Multifidelity Max-Value Entropy Search through Joint Entropy". Neural Computation, 8.08.2022, 1–59. http://dx.doi.org/10.1162/neco_a_01530.
Pełny tekst źródłaAnhichem, Mehdi, Sebastian Timme, Jony Castagna, Andrew J. Peace i Moira Maina. "Data Fusion of Wing Pressure Distributions Using Scalable Gaussian Processes". AIAA Journal, 25.03.2024, 1–16. http://dx.doi.org/10.2514/1.j063317.
Pełny tekst źródłaAndrés-Thió, Nicolau, Mario Andrés Muñoz i Kate Smith-Miles. "Bifidelity Surrogate Modelling: Showcasing the Need for New Test Instances". INFORMS Journal on Computing, 9.08.2022. http://dx.doi.org/10.1287/ijoc.2022.1217.
Pełny tekst źródłaWankhede, Moresh J., Neil W. Bressloff i Andy J. Keane. "Combustor Design Optimization Using Co-Kriging of Steady and Unsteady Turbulent Combustion". Journal of Engineering for Gas Turbines and Power 133, nr 12 (12.09.2011). http://dx.doi.org/10.1115/1.4004155.
Pełny tekst źródłaRozprawy doktorskie na temat "Multifidelity techniques"
Fossà, Alberto. "Propagation multi-fidélité d’incertitude orbitale en présence d’accélérations stochastiques". Electronic Thesis or Diss., Toulouse, ISAE, 2024. http://www.theses.fr/2024ESAE0009.
Pełny tekst źródłaThe problem of nonlinear uncertainty propagation (UP) is crucial in astrodynamics since all systems of practical interest, ranging from navigation to orbit determination (OD) and target tracking, involve nonlinearities in their dynamics and measurement models. One topic of interest is the accurate propagation of uncertainty through the nonlinear orbital dynamics, a fundamental requirement in several applications such as space surveillance and tracking (SST), space traffic management (STM), and end-of-life (EOL) disposal. Given a finite-dimensional representation of the probability density function (pdf) of the initial state, the main goal is to obtain a similar representation of the state pdf at any future time. This problem has been historically tackled with either linearized methods or Monte Carlo (MC) simulations, both of which are unsuitable to satisfy the demand of a rapidly growing number of applications. Linearized methods are light on computational resources, but cannot handle strong nonlinearities or long propagation windows due to the local validity of the linearization. In contrast, MC methods can handle any kind of nonlinearity, but are too computationally expensive for any task that requires the propagation of several pdfs. Instead, this thesis leverages multifidelity methods and differential algebra (DA) techniques to develop computationally efficient methods for the accurate propagation of uncertainties through nonlinear dynamical systems. The first method, named low-order automatic domain splitting (LOADS), represents the uncertainty with a set of second-order Taylor polynomials and leverages a DA-based measure of nonlinearity to adjust their number based on the local dynamics and the required accuracy. An adaptive Gaussian mixture model (GMM) method is then developed by associating each polynomial to a weighted Gaussian kernel, thus obtaining an analytical representation of the state pdf. Going further, a multifidelity method is proposed to reduce the computational cost of the former algorithms while retaining a similar accuracy. The adaptive GMM method is in this case run on a low-fidelity dynamical model, and only the expected values of the kernels are propagated point-wise in high-fidelity dynamics to compute a posteriori correction of the low-fidelity state pdf. If the former methods deal with the propagation of an initial uncertainty through a deterministic dynamical model, the effects of mismodeled or unmodeled forces are finally considered to further enhance the realism of the propagated statistics. In this case, the multifidelity GMM method is used at first to propagate the initial uncertainty through a low-fidelity, deterministic dynamical model. The point-wise propagations are then replaced with a DA-based algorithm to efficiently propagate a polynomial representation of the moments of the pdf in a stochastic dynamical system. These moments model the effects of stochastic accelerations on the deterministic kernels’ means, and coupled with the former GMM provide a description of the propagated state pdf that accounts for both the uncertainty in the initial state and the effects of neglected forces. The proposed methods are applied to the problem of orbit UP, and their performance is assessed in different orbital regimes. The results demonstrate the effectiveness of these methods in accurately propagating the initial uncertainty and the effects of process noise at a fraction of the computational cost of high-fidelity MC simulations. The LOADS method is then employed to solve the initial orbit determination (IOD) problem by exploiting the information on measurement uncertainty and to develop a preprocessing scheme aimed at improving the robustness of batch OD algorithms. These tools are finally validated on a set of real observations for an object in geostationary transfer orbit (GTO)
Streszczenia konferencji na temat "Multifidelity techniques"
Ren, Jie, Andrew S. Thelen, Anand Amrit, Xiaosong Du, Leifur T. Leifsson, Yonatan Tesfahunegn i Slawomir Koziel. "Application of Multifidelity Optimization Techniques to Benchmark Aerodynamic Design Problems". W 54th AIAA Aerospace Sciences Meeting. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-1542.
Pełny tekst źródłaGeraci, Gianluca, Michael S. Eldred, Alex Gorodetsky i John Jakeman. "Recent advancements in Multilevel-Multifidelity techniques for forward UQ in the DARPA Sequoia project". W AIAA Scitech 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-0722.
Pełny tekst źródłaGeraci, Gianluca, Michael S. Eldred, Alex Gorodetsky i John Jakeman. "Correction: Recent advancements in Multilevel-Multifidelity techniques for forward UQ in the DARPA Sequoia project". W AIAA Scitech 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-0722.c1.
Pełny tekst źródłaThurman, Christopher, Nicole Pettingill i Nikolas Zawodny. "The Effect of Boundary Layer Character on Stochastic Rotor Blade Vortex Shedding Noise". W Vertical Flight Society 78th Annual Forum & Technology Display. The Vertical Flight Society, 2022. http://dx.doi.org/10.4050/f-0078-2022-17428.
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