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An optimal control approach to a posteriori error estimation in finite element methods
2001
Acta Numerica
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These include problems from viscous fluid flow, chemically reactive flow, elasto-plasticity, radiative transfer, and optimal control. ...
This article surveys a general approach to error control and adaptive mesh design in Galerkin finite element methods that is based on duality principles as used in optimal control. ...
Acknowledgements The authors wish to thank several members of the Numerical Analysis Group at their institute for important contributions to this survey article, particularly W. Bangerth, M. ...
doi:10.1017/s0962492901000010
fatcat:jnz3v3b3sjbnpkpk5kccbv2iae
Planet Formation: An Optimized Population-synthesis Approach
2018
Astrophysical Journal
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2018 pre-print arXiv:1808.03293v1 fatcat:k3ljdw4fdrgktnbpwfqxufrlti
The physics of planet formation is investigated using a population synthesis approach. ...
Although the study was designed to match the extrasolar planet distribution, analogs of the Solar System form in 1-2% of systems that contain at least 4 protoplanets. ...
In this paper, we adopt a population synthesis approach to examine the physics of planet formation. ...
doi:10.3847/1538-4357/aada09
fatcat:bzryk27qsjct3bef3ob6xo2564
An optimization-based approach to calculating neutrino flavor evolution
2017
Physical Review D
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D.A. uses measurements obtained from a physical system to estimate the state variable evolution and parameter values of the associated model. ...
Formulated as an optimization procedure, D.A. can offer an integration-blind approach to predicting model evolution, which offers an advantage for models that thwart solution via traditional numerical ...
OPTIMIZATION-BASED APPROACH TO NEUTRINO … PHYSICAL REVIEW D 96, 083008 (2017) 083008 -13 in P y that is common to many of the results reflects the slight deviation from perfect adiabaticity: the polarization ...
doi:10.1103/physrevd.96.083008
fatcat:pr6jgmwi7nborf6ms7r6adqdny
Speciality oils supply chain optimization: From a decoupled to an integrated planning approach
2013
European Journal of Operational Research
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We present numerical examples to illustrate potential effects of integration and coordination and discuss the advantages and disadvantages of the integrated over the decoupled approach. ...
We study a problem of tactical planning in a divergent supply chain. It involves decisions regarding production, inventory, internal transportation, sales and distribution to customers. ...
They would also like to thank Vivienne Knowles for her help in bringing this article to fruition. ...
doi:10.1016/j.ejor.2013.03.007
fatcat:syuvfajiqbdb3npsgfcdojgqcu
An Optimal Multiple Stopping Approach to Infrastructure Investment Decisions
[article]
2015
arXiv
pre-print
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In order to value the underlying real option, we introduce an optimal multiple stopping approach that accounts for operational flexibility, delay induced by lead time, and multiple (finite/infinite) future ...
We provide an analytical characterization of the firm's value function and optimal stopping rule. ...
Acknowledgements The authors are grateful to Klaus Lackner, Garrett van Ryzin and Caner Göçmen for their useful suggestions and conversations. ...
arXiv:1502.00861v1
fatcat:dfginh2w6resrijjnkswyrftse
An Optimization Approach for Deriving Upper and Lower Bounds of Transportation Network Vulnerability under Simultaneous Disruptions of Multiple Links
2017
Transportation Research Procedia
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This paper aims to develop an optimization approach for deriving the upper and lower bounds of transportation network vulnerability under simultaneous disruptions of multiple links without the need to ...
Abstract This paper aims to develop an optimization approach for deriving the upper and lower bounds of transportation network vulnerability under simultaneous disruptions of multiple links without the ...
Acknowledgements The authors are grateful to three anonymous referees for their constructive comments and suggestions to improve the quality and clarity of the paper. ...
doi:10.1016/j.trpro.2017.05.036
fatcat:t27i2jrzpfhvvfydspfqvy7zca
Case Study for an Operation-based Topology Optimization Using the Digital Twin Approach
2021
Procedia CIRP
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Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. ...
An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach. ...
The case study addressed the product topology optimization for an arbor press based on collected operational product load data in place of estimated or experience data, in order to reduce the use of materials ...
doi:10.1016/j.procir.2021.01.114
fatcat:xgv7ftzlbzbuvpasbu6wgw3ane
Station Importance Evaluation in Dynamic Bike-Sharing Rebalancing Optimization Using an Entropy-Based TOPSIS Approach
2021
IEEE Access
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An entropy-based Technique for Order of Preference by Similarity to the Ideal Solution (TOPSIS) approach is proposed to weigh different criteria and evaluate station importance. ...
As an eco-friendly travel mode, bike-sharing has prevailed around the world. However, the systems are imbalanced due to the asymmetric spatial and temporal distribution of user demand. ...
[18] put forward an improved ARIMA model, considering signals from neighboring stations and seasonal trends to estimate available bicycles at each station. ...
doi:10.1109/access.2021.3063881
fatcat:qtwqjnijubfoxhjhbkquvw6bwu
Machine layout: an optimization and knowledge-based approach
1990
International Journal of Production Research
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of material from plant i to plant k of transporting a unit material from location j to location I following were
defined:
total number of plants/locations
net revenue from operating plant i at location ...
Flow doninance can be defined as the coefficient of variation of the flow data, computed from the flow matrix elements as (Herroelen and Gils, 1985) : 1 0'1 MSTA appears to provide optimal results when ...
Four patterns of layou! were identified. The motion characteristic of an AGV was also anal.yzed. À neri approach lo modelling the layout problem was presented. The nain inten! ...
doi:10.1080/00207549008942744
fatcat:du3nk7vhjzfpnmglypwbgx2cse
Optimizing Public Transportation Networks Using Space Syntax as an Evidence-Based Approach: The Case Study of Mansoura City. (Dept. A)
2020
MEJ. Mansoura Engineering Journal
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This research applies Space Syntax configurational analysis with the aim to present an evidence approach to optimize its transportation network. ...
Transport network planning in Egypt suffers from insufficient planning that should be done prior to execution. ...
The predominant question this research attempts to answer is what are the potentials and limitations of Space Syntax as an approach in the process of optimizing public transportation networks? ...
doi:10.21608/bfemu.2020.118212
fatcat:bv4r6byo2vhcxbo3gpuhqze4v4
An Integer Optimization Approach to Large-Scale Air Traffic Flow Management
2011
Operations Research
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The model covers all the phases of each flight-i.e., takeoff, en route cruising, and landing-and solves for an optimal combination of flow management actions, including ground-holding, rerouting, speed ...
Moreover, three classes of valid inequalities are incorporated into the model to strengthen the polyhedral structure of the underlying relaxation. ...
Guglielmo Lulli's research has benefited from a six-month Fulbright Scholarship (May-November 2007). ...
doi:10.1287/opre.1100.0899
fatcat:yh5upktw6ndpfkm2oi5va7fjlq
An Integrated Modeling Approach to Evaluate and Optimize Data Center Sustainability, Dependability and Cost
2014
Energies
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Our work aims to propose an integrated approach to estimate and optimize these issues with the support of the developed environment, Mercury. ...
The approaches that evaluate and optimize these requirements are essential to support designers of data center architectures. ...
Acknowledgments The authors would like to thank the reviewers for their valuable comments and suggestions to improve the quality of this work. ...
doi:10.3390/en7010238
fatcat:nvg6rc3zgrfmxbtakv2ad5lwnq
Carbon and Phosphorus Allocation in Annual Plants: An Optimal Functioning Approach
2020
Frontiers in Plant Science
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We develop a dynamic plant model based on the principle of optimal carbon (C) and P allocation to investigate growth and functional response to contrasting levels of soil P availability. ...
modelling plant response to environmental change that can be used in more physically driven vegetation models. ...
We would like to thank Sanna Sevanto, Assad Mrad and Chonggang Xu for their valuable input. ...
doi:10.3389/fpls.2020.00149
pmid:32174939
pmcid:PMC7056904
fatcat:pj7m5itiezhbpnaowzawtxbc6a
An Optimization-Based Impedance Approach for Robot Force Regulation with Prescribed Force Limits
2015
Mathematical Problems in Engineering
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An optimization based approach for the regulation of excessive or insufficient forces at the end-effector level is introduced. ...
Penalty functions are considered in the DOP to handle the constraints on the interaction force. The optimization problem is online solved through the gradient flow approach. ...
Acknowledgments All authors acknowledge support from CONACyT Mexico via Projects 133527 and 84060. The first author acknowledges support from CONACyT Mexico through Scholarship 28753. ...
doi:10.1155/2015/918301
fatcat:xjoykscwszdb3fdiuwi3i6w4jy
Multivariate Optimization in Large-Scale Building Problems: An Architectural and Urban Design Approach for Balancing Social, Environmental, and Economic Sustainability
2020
Sustainability
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This paper explores the promise of genetic algorithms as a tool for optimization of buildings at a neighborhood scale across the conflicting demands of social, environmental, and economic sustainability ...
A large urban site in Chicago, Illinois, is selected to test the viability of using a multi criteria genetic algorithm to optimize the potential building mix in a newly planned development. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/su122310052
fatcat:ycgmxxyrhrebnpnbgo7xonjsey
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