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Optimization and Engineering OnlineFirst articles

22-04-2024 | Research Article

Integrated batch production planning and scheduling optimization considering processing time uncertainty

Planning and scheduling of a multipurpose batch chemical plant is always affected by uncertain factors, and one of them is the processing time of tasks. When the processing time deviates from its nominal value, the original production target …

Authors:
Jingxing Gao, Ziqing Guo, Linlin Liu, Yachao Dong, Jian Du

Open Access 22-04-2024 | Research Article

Novel solution strategies for multiparametric nonlinear optimization problems with convex objective function and linear constraints

This paper expands the multiparametric quadratic programming (mp-QP) framework presented in Narciso et al. (Comput Chem Eng 164:107882, 2022. https://doi.org/10.1016/j.compchemeng.2022.107882 ) to the more general multiparametric nonlinear …

Authors:
Diogo A. C. Narciso, Efstratios N. Pistikopoulos

22-04-2024 | Research Article

Topology optimization of two-dimensional magnetorheological elastomer phononic crystal plate with tunable bandgap considering a specified target frequency

Phononic crystals with tunable bandgap characteristics have attracted increasing research interest. In order to design the widest tunable bandgap, a magnetorheological elastomer phononic crystal plate (MREPCP) was developed and a topology …

Authors:
Yuhuai Wang, Jian Xing, Zhizheng Chen, Xiaojing Zhu, Jianfang Huang

05-04-2024 | Research Article

Generalized measure Black–Scholes equation: towards option self-similar pricing

In this work, we give a generalized formulation of the Black–Scholes model. The novelty resides in considering the Black–Scholes model to be valid on ’average’, but such that the pointwise option price dynamics depends on a measure representing …

Authors:
Nizar Riane, Claire David

25-03-2024 | Research Article

Simple and effective meta relational learning for few-shot knowledge graph completion

Conventional knowledge graph completion methods are effective for completing knowledge graphs (KGs), but they face significant challenges when dealing with relations with only a limited number of associative triples. To address the issue of …

Authors:
Shujian Chen, Bin Yang, Chenxing Zhao

25-03-2024 | Research Article

Direct and inverse problems of fractional Sturm–Liouville equation

In this paper we define a fractional Sturm–Liouville problem (FSLP) on [0, 1] subject to dirichlet boundary condition. First we discretize FSLP to obtain the corresponding matrix eigenvalue problem (MEP) of finite order N. In direct problem we …

Authors:
Zahra Kavousi Kalashmi, Hanif Mirzaei, Kazem Ghanbari

Open Access 25-03-2024 | Research Article

An ensemble of artificial neural network models to forecast hourly energy demand

We propose an ensemble artificial neural network (EANN) methodology for predicting the day ahead energy demand of a district heating operator (DHO). Specifically, at the end of one day, we forecast the energy demand for each of the 24 h of the …

Authors:
Andrea Manno, Manuel Intini, Ola Jabali, Federico Malucelli, Dario Rando

22-03-2024 | Research Article

Service-oriented operational decision optimization for dry bulk shipping fleet under stochastic demand

Dry bulk shipping plays a crucial role in intercontinental bulk cargo transport, with operators managing fleets to meet shippers’ transportation demand. A primary challenge for these operators is making optimal operational decisions about ship …

Authors:
Jun Gao, Jie Wang, Liming Li, Jinpeng Liang

18-03-2024 | Research Article

Regularized dynamics for monotone inverse variational inequalities in hilbert spaces

In this paper, we present a regularized dynamical system method for solving monotone inverse variational inequalities (IVIs) in infinite dimensional Hilbert spaces. It is shown that the corresponding Cauchy problem admits a unique strong global …

Authors:
Pham Ky Anh, Trinh Ngoc Hai

Open Access 28-02-2024 | Review Article

Co-optimizing the smart grid and electric public transit bus system

As climate change provides impetus for investing in smart cities, with electrified public transit systems, we consider electric public transportation buses in an urban area, which play a role in the power system operations in addition to their …

Authors:
Mertcan Yetkin, Brandon Augustino, Alberto J. Lamadrid, Lawrence V. Snyder

21-02-2024 | Research Article

Linewalker: line search for black box derivative-free optimization and surrogate model construction

This paper describes a simple, but effective sampling method for optimizing and learning a discrete approximation (or surrogate) of a multi-dimensional function along a one-dimensional line segment of interest. The method does not rely on …

Authors:
Dimitri J. Papageorgiou, Jan Kronqvist, Krishnan Kumaran

11-01-2024 | Research Article

Adjoint based aerodynamic shape optimization of a semi-submerged inlet duct and upstream inlet surface

Aerodynamic performance of a semi-submerged inlet exposed to a significant amount of boundary layer ingestion is optimized using the open-source flow and adjoint solver SU2. Pressure recovery is taken as the objective function. Mass flow rate and …

Authors:
Umut Can Küçük, Ismail H. Tuncer

Open Access 28-12-2023 | Research Article

Scalable enforcement of geometric non-interference constraints for gradient-based optimization

Many design optimization problems include constraints to prevent intersection of the geometric shape being optimized with other objects or with domain boundaries. When applying gradient-based optimization to such problems, the constraint function …

Authors:
Ryan C. Dunn, Anugrah Jo Joshy, Jui-Te Lin, Cédric Girerd, Tania K. Morimoto, John T. Hwang

Open Access 20-12-2023 | Research Article

Extensions to generalized disjunctive programming: hierarchical structures and first-order logic

Optimization problems with discrete–continuous decisions are traditionally modeled in algebraic form via (non)linear mixed-integer programming. A more systematic approach to modeling such systems is to use generalized disjunctive programming …

Authors:
Hector D. Perez, Ignacio E. Grossmann

19-12-2023 | Research Article

A solution method for mixed-variable constrained blackbox optimization problems

Many real-world application problems encountered in industry have no analytical formulation, that is they are blackbox optimization problems, and often make use of expensive numerical simulations. We propose a new blackbox optimization algorithm …

Authors:
Marie-Ange Dahito, Laurent Genest, Alessandro Maddaloni, José Neto

19-12-2023 | Research Article

Mixed-integer exponential conic optimization for reliability enhancement of power distribution systems

This paper develops an optimization model for determining the placement of switches, tie lines, and underground cables in order to enhance the reliability of an electric power distribution system. A central novelty in the model is the inclusion of …

Authors:
Milad Dehghani Filabadi, Chen Chen, Antonio Conejo

16-12-2023 | Research Article

A direct block scheduling model considering operational space requirement for strategic open-pit mine production planning

Long-term block scheduling is a challenging problem that involves determining the best extraction period for blocks to maximize the net present value of the open-pit mining business. This process involves multiple constraints, mainly ensuring safe …

Authors:
Pierre Nancel-Penard, Enrique Jelvez

14-12-2023 | Research Article

A full-Newton step interior-point algorithm for the special weighted linear complementarity problem based on positive-asymptotic kernel function

The primal-dual interior-point method is widely recognized as one of the most effective approaches for solving the linear complementarity problem. As an extension of the linear complementarity problem, the study of the weighted linear …

Authors:
Mingwang Zhang, Dechun Zhu, Jiawei Zhong

08-12-2023 | Research Article

On maximizing probabilities for over-performing a target for Markov decision processes

This paper studies the dual relation between risk-sensitive control and large deviation control of maximizing the probability for out-performing a target for Markov Decision Processes. To derive the desired duality, we apply a non-linear extension …

Authors:
Tanhao Huang, Yanan Dai, Jinwen Chen

Open Access 04-12-2023 | Research Article

Source detection on graphs

Spreading processes on networks (graphs) have become ubiquitous in modern society with prominent examples such as infections, rumors, excitations, contaminations, or disturbances. Finding the source of such processes based on observations is …

Authors:
Tobias Weber, Volker Kaibel, Sebastian Sager