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Convex piecewise-linear fitting
Springer Science and Business Media LLC - Tập 10 - Trang 1-17 - 2008
Alessandro Magnani, Stephen P. Boyd
We consider the problem of fitting a convex piecewise-linear function, with some specified form, to given multi-dimensional data. Except for a few special cases, this problem is hard to solve exactly, so we focus on heuristic methods that find locally optimal fits. The method we describe, which is a variation on the K-means algorithm for clustering, seems to work well in practice, at least on data...... hiện toàn bộ
Transient gas pipeline flow: analytical examples, numerical simulation and a comparison to the quasi-static approach
Springer Science and Business Media LLC - Tập 24 - Trang 425-446 - 2021
Martin Gugat, Richard Krug, Alexander Martin
The operation of gas pipeline flow with high pressure and small Mach numbers allows to model the flow by a semilinear hyperbolic system of partial differential equations. In this paper we present a number of transient and stationary analytical solutions of this model. They are used to discuss and clarify why a PDE model is necessary to handle certain dynamic situations in the operation of gas tran...... hiện toàn bộ
An adaptive discretization algorithm for the design of water usage and treatment networks
Springer Science and Business Media LLC - - 2019
Arie M. C. A. Koster, Sascha Kuhnke
A nonlinear programming technique to compute a tight lower bound for the real structured singular value
Springer Science and Business Media LLC - Tập 12 - Trang 445-458 - 2010
Ahmet Yazıcı, Abdurrahman Karamancıoğlu, Refail Kasimbeyli
The real structured singular value (RSSV, or real μ) is a useful measure to analyze the robustness of linear systems subject to structured real parametric uncertainty, and surely a valuable design tool for the control systems engineers. We formulate the RSSV problem as a nonlinear programming problem and use a new computation technique, F-modified subgradient (F-MSG) algorithm, for its lower bound...... hiện toàn bộ
A new predictor–corrector method for optimal power flow
Springer Science and Business Media LLC - Tập 16 - Trang 335-346 - 2014
Roy Wilhelm Probst, Aurelio Ribeiro Leite Oliveira
A predictor–corrector interior-point method is developed in order to deal with the AC active and reactive optimal power flow problem. Voltage rectangular coordinates are adopted instead of polar ones, since they allow nonlinear corrections for the primal and dual feasibility conditions and not only for the complementary constraints as in the traditional nonlinear programming methods. A new heurist...... hiện toàn bộ
PARETO: An open-source produced water optimization framework
Springer Science and Business Media LLC - - 2023
Markus Drouven, Andrés J. Calderón, Miguel Zamarripa, K. Beattie
EGO shape optimization of horn-loaded loudspeakers
Springer Science and Business Media LLC - Tập 9 - Trang 361-374 - 2007
Rick C. Morgans, Anthony C. Zander, Colin H. Hansen, David J. Murphy
Horn-loaded loudspeakers increase the efficiency and control the spatial distribution of sound radiated from the horn mouth. They are often used as components in cinema sound systems where it is desired that the sound be broadcast onto the audience uniformly at all frequencies, improving the listening experience. The sound distribution, or beamwidth, is related to the shape of the horn and can be...... hiện toàn bộ
An asymmetric suboptimization approach to aerostructural optimization
Springer Science and Business Media LLC - Tập 10 - Trang 133-152 - 2008
Ian R. Chittick, Joaquim R. R. A. Martins
An asymmetric suboptimization method for performing multidisciplinary design optimization is introduced. The objective of the proposed method is to improve the overall efficiency of aerostructural optimization, by simplifying the system-level problem, and thereby reducing the number of calls to a potentially costly aerodynamics solver. To guide a gradient-based optimization algorithm, an extension...... hiện toàn bộ
Two-warehouse production inventory model for a deteriorating item with time-varying demand and shortages: a genetic algorithm with varying population size approach
Springer Science and Business Media LLC - Tập 15 - Trang 889-907 - 2013
Debasis Das, Mohuya B. Kar, Arindam Roy, Samarjit Kar
A production-inventory model for a deteriorating item with time-varying demand and fully backlogged shortages is developed for a two warehouse system. For display and storage of inventory, management hires one warehouse of finite capacity at the market place, called own warehouse abbreviated as OW and another warehouse with large capacity as it may be required at a distance place from the market, ...... hiện toàn bộ
Locally weighted regression models for surrogate-assisted design optimization
Springer Science and Business Media LLC - Tập 19 - Trang 213-238 - 2017
Bastien Talgorn, Charles Audet, Sébastien Le Digabel, Michael Kokkolaras
We consider engineering design optimization problems where the objective and/or constraint functions are evaluated by means of computationally expensive blackboxes. Our practical optimization strategy consists of solving surrogate optimization problems in the search step of the mesh adaptive direct search algorithm. In this paper, we consider locally weighted regression models to build the necessa...... hiện toàn bộ
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