Advances in Uncertainty Quantification and Optimization Under Uncertainty with Aerospace Applications
Advances in Uncertainty Quantification and Optimization Under Uncertainty with Aerospace Applications

Author: Massimiliano Vasile

Publisher: Springer

Published: 2023-01-29

Total Pages: 0

ISBN-13: 9783030805449

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The 2020 International Conference on Uncertainty Quantification & Optimization gathered together internationally renowned researchers in the fields of optimization and uncertainty quantification. The resulting proceedings cover all related aspects of computational uncertainty management and optimization, with particular emphasis on aerospace engineering problems. The book contributions are organized under four major themes: Applications of Uncertainty in Aerospace & Engineering Imprecise Probability, Theory and Applications Robust and Reliability-Based Design Optimisation in Aerospace Engineering Uncertainty Quantification, Identification and Calibration in Aerospace Models This proceedings volume is useful across disciplines, as it brings the expertise of theoretical and application researchers together in a unified framework.

Methods of Optimization Under Uncertainty
Methods of Optimization Under Uncertainty

Author:

Publisher:

Published: 1992

Total Pages: 14

ISBN-13:

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Research under this grant has focused on large-scale optimization methodology connected with the solution of problems in which decisions must be made in the face of uncertainty: stochastic programming problems. The principal techniques developed for modeling such problems have been used, including various new kinds of decomposition into small-scale optimization problems in extended linear-quadratic programming. Extended linear-quadratic programming goes beyond ordinary linear and quadratic programming in allowing for objective functions to incorporate penalty terms and other features that create piecewise linear or quadratic formulas. The new decomposition techniques include primal-dual Lagrangian decomposition and forward-backward splitting. In total, the 4-year grant supported the writing of 16 technical papers (12 already in print or about to be), the development and documentation of 2 computer codes, and the completion of 3 doctoral dissertations.

Optimization Under Moment, Robust, and Data-driven Models of Uncertainty
Optimization Under Moment, Robust, and Data-driven Models of Uncertainty

Author: Xuan Vinh Doan

Publisher:

Published: 2010

Total Pages: 156

ISBN-13:

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We study the problem of moments and present two diverse applications that apply both the hierarchy of moment relaxation and the moment duality theory. We then propose a moment-based uncertainty model for stochastic optimization problems, which addresses the ambiguity of probability distributions of random parameters with a minimax decision rule. We establish the model tractability and are able to construct explicitly the extremal distributions. The quality of minimax solutions is compared with that of solutions obtained from other approaches such as data-driven and robust optimization approach. Our approach shows that minimax solutions hedge against worst-case distributions and usually provide low cost variability. We also extend the moment-based framework for multi-stage stochastic optimization problems, which yields a tractable model for exogenous random parameters and affine decision rules. Finally, we investigate the application of data-driven approach with risk aversion and robust optimization approach to solve staffing and routing problem for large-scale call centers. Computational results with real data of a call center show that a simple robust optimization approach can be more efficient than the data-driven approach with risk aversion.