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Scalarizing Multi-Objective Robot Planning Problems Using Weighted Maximization

Wilde, N. (author), Smith, Stephen L. (author), Alonso-Mora, J. (author)

When designing a motion planner for autonomous robots there are usually multiple objectives to be considered. However, a cost function that yields the desired trade-off between objectives is not easily obtainable. A common technique across many applications is to use a weighted sum of relevant objective functions and then carefully adapt the...

journal article 2024

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Buffer scheduling for improving on-time performance and connectivity with a multi-objective simulation–optimization model: A proof of concept for the airline industry

van Schilt, Isabelle M. (author), van Kalker, Jonna (author), Lefter, I. (author), Kwakkel, J.H. (author), Verbraeck, A. (author)

Schedule design in the transportation and logistics sector is a widely studied problem. Transport service providers, such as the train industry and aviation, aim for schedules to be on-time according to the planning (i.e., on-time performance or OTP) in order to increase the service level by ensuring that passengers actually make their...

journal article 2024

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Optimizing safety barrier allocation to prevent domino effects in large-scale chemical clusters using graph theory and optimization algorithms

Zhang, Muchen (author), Li, Zelin (author), Hou, Shuya (author), Deng, Siyu (author), Reniers, G.L.L.M.E. (author), Yang, M. (author), Zhang, Bin (author)

Domino effects are high-impact low-probability events that can have catastrophic consequences. To prevent and to reduce risks related to such events, safety barriers (SBs) are crucial. However, the initiation, propagation, and stopping processes of domino effects are characterized with complexity and uncertainties and hence they are...

journal article 2024

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Statistically Distinct Plans for Multi-Objective Task Assignment

Wilde, N. (author), Alonso-Mora, J. (author)

We study the problem of finding statistically distinct plans for stochastic task assignment problems such as online multi-robot pickup and delivery (MRPD) when facing multiple competing objectives. In many real-world settings robot fleets do not only need to fulfil delivery requests, but also have to consider auxiliary objectives such as...

journal article 2024

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Comparison of Compact and Decentralized Urban Development Pathways for Flood Mitigation in Urbanizing Deltas: Guangzhou in the Pearl River Delta as a Case Study

Lin, Weibin (author), Sun, Yimin (author), Nijhuis, S. (author)

Floods are common and inevitable natural disasters. Achieve Sustainable Development Goal (SDG) 11.5 is a critical challenge for coastal cities, especially those in deltaic lowlands such as in the case of Guangzhou, China. Regarding the spatial planning and design of such urban regions, it is crucial to study the impacts of flooding in compact or...

journal article 2024

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Designing a reliable-sustainable supply chain network: adaptive m-objective ε-constraint method

Sepehri, A. (author), Tirkolaee, Erfan Babaee (author), Simic, Vladimir (author), Ali, Sadia Samar (author)

In the current era emphasizing sustainability and circularity, supply chain network design is a critical challenge for making reliable decisions. The optimization of facility location-allocation inventory problems (FLAIPs) holds the key to achieving dependable product delivery with reduced costs and carbon emissions. Despite the importance of...

journal article 2024

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Operations Eclipse Sequencing in Multipurpose Dam Planning

Arnold, Wyatt (author), Zatarain Salazar, J. (author), Carlino, Angelo (author), Giuliani, Matteo (author), Castelletti, Andrea (author)

A resurgence of dam planning and construction is under way in river basins where untapped hydropower potential could meet growing energy demands. Despite calls for more comprehensive evaluation of dam projects, most dams continue to be planned with traditional methods that neglect interdependencies between planning and management and cumulative...

journal article 2023

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An epsilon-constraint-based exact multi-objective optimization approach for the ship schedule recovery problem in liner shipping

Elmi, Zeinab (author), Li, Bokang (author), Liang, Benbu (author), Lau, Yui yip (author), Borowska-Stefańska, Marta (author), Wiśniewski, Szymon (author), Dulebenets, Maxim A. (author)

Time management is crucial for liner shipping services. A variety of unexpected events can disrupt liner shipping schedules. A real-time port capacity analysis and rescheduling the original ship operations would be necessary to counteract the negative effects of such disruptions. Different ship schedule recovery options can be adopted in...

journal article 2023

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Early-stage analysis of a novel insulation material based on MPCM-doped cementitious foam: Modelling of properties, identification of production process hotspots and exploration of performance trade-offs

Zhilyaev, D. (author), Fachinotti, Victor D. (author), Zanoni, Francesca (author), Ortega, Amaya (author), Goracci, Guido (author), Mankel, Christoph (author), Koenders, Eduardus A.B. (author), Jonkers, H.M. (author)

This study presents an early-stage design exploration of NRG-Foam, an innovative insulation material composed of cementitious foam doped with microencapsulated phase change materials (MPCMs). The study comprises the static part that utilizes life cycle assessment and life cycle costing assessment for getting insight into the impacts of the...

journal article 2023

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Design of a Highly Efficient 20 kW Inductive Power Transfer System with Improved Misalignment Performance

Shi, W. (author), Dong, J. (author), Soeiro, Thiago B. (author), Riekerk, C. (author), Grazian, F. (author), Yu, G. (author), Bauer, P. (author)

Due to the urgent desire for a fast, convenient, and efficient battery charging technology for electric vehicle (EV) users, extensive research has been conducted into the design of high-power inductive power transfer (IPT) systems. However, there are few studies that formulate the design as a multiobjective optimization (MOO) research...

journal article 2022

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Best Fit for Common Purpose: A Multi-Stakeholder Design Optimization Methodology for Construction Management

Zhilyaev, D. (author), Binnekamp, R. (author), Wolfert, A.R.M. (author)

Within traditional design processes, decisions are often made based on individualistic values and late-stage assessments conducted on a predefined set of design alternatives potentially leading to suboptimal design decisions and conflicts. The issues are further amplified by the growing complexity of construction project management where an...

journal article 2022

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A business class for autonomous mobility-on-demand: Modeling service quality contracts in dynamic ridesharing systems

Alves Beirigo, B. (author), Negenborn, R.R. (author), Alonso-Mora, J. (author), Schulte, F. (author)

With the popularization of transportation network companies (TNCs) (e.g., Uber, Lyft) and the rise of autonomous vehicles (AVs), even major car manufacturers are increasingly considering themselves as autonomous mobility-on-demand (AMoD) providers rather than individual vehicle sellers. However, matching the convenience of owning a vehicle...

journal article 2022

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L'effet de la taille et du fluide actif sur la conception multi-objectifs des compresseurs centrifuges à grande vitesse

Giuffré, A. (author), Colonna, Piero (author), Pini, M. (author)

The impact of size and working fluid on the efficiency, operating range, and axial thrust on bearings is examined for high-speed, oil-free centrifugal compressors. First, the development and validation of a reduced-order model based on scaling principles is documented. Then, the validated compressor model is used to generate design maps for...

journal article 2022

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Managing Water and Energy on Small Islands Study Case Caye Chapel

Contreras Navarro, F.J. (author), van Nooijen, R.R.P. (author)

Small islands that support urban communities provide a unique opportunity to study the urban water cycle, its energy needs, and possible links to renewable energy. In this paper, models for an energy generation system and the processes in the urban water cycle are formulated. These are combined and then used to determine optimal parameters...

journal article 2022

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Systematic design optimization of grabs considering bulk cargo variability

Mohajeri, M. (author), van den Bergh, Arjan J. (author), Jovanova, J. (author), Schott, D.L. (author)

Ship unloader grabs are usually designed using the manufacturer's in-house knowledge based on a traditional physical prototyping approach. The grab performance depends greatly on the properties of the bulk material being handled. By considering the bulk cargo variability in the design process, the grab performance can be improved...

journal article 2021

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Support Vector Machine Applied to the Optimal Design of Composite Wing Panels

dos Santos, Rogério Rodrigues (author), Machado, Tulio Gomes de Paula (author), Castro, Saullo G.P. (author)

One of the core technologies in lightweight structures is the optimal design of laminated composite stiffened panels. The increasing tailoring potential of new materials added to the simultaneous optimization of various design regions, leading to design spaces that are vast and non-convex. In order to find an optimal design using limited...

journal article 2021

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Multi-Objective Sustainability Optimization of Biomass Residues to Ethanol via Gasification and Syngas Fermentation: Trade-Offs between Profitability, Energy Efficiency, and Carbon Emissions

Magalhaes de Medeiros, E. (author), Noorman, H.J. (author), Filho, Rubens Maciel (author), Posada Duque, J.A. (author)

This work presents a strategy for optimizing the production process of ethanol via integrated gasification and syngas fermentation, a conversion platform of growing interest for its contribution to carbon recycling. The objective functions (minimum ethanol selling price (MESP), energy efficiency, and carbon footprint) were evaluated for the...

journal article 2021

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Multi-objective optimization of building-integrated microalgae photobioreactors for energy and daylighting performance

Talaei, Maryam (author), Mahdavinejad, Mohammadjavad (author), Azari, Rahman (author), Prieto Hoces, A.I. (author), Sangin, Hamed (author)

As a state-of-the-art green façade technology, building-integrated microalgae bioreactor has the potential to reduce buildings’ carbon footprint and energy consumption. The present study aims to address the knowledge gap in the energy and daylighting performance of algae photobioreactor façade. The paper first studies the effects of algae...

journal article 2021

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Sectorization for Water Distribution Systems with Multiple Sources: A Performance Indices Comparison

Bianchotti, Jezabel D. (author), Denardi, Melina (author), Castro-Gama, Mario (author), Puccini, Gabriel D. (author)

Sectorization is an effective technique for reducing the complexities of analyzing and managing of water systems. The resulting sectors, called district metering areas (DMAs), are expected to meet some requirements and performance criteria such as minimum number of intervention, pressure uniformity, similarity of demands, water quality and...

journal article 2021

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Multi-scenario multi-objective robust optimization under deep uncertainty: A posteriori approach

Shavazipour, Babooshka (author), Kwakkel, J.H. (author), Miettinen, Kaisa (author)

This paper proposes a novel optimization approach for multi-scenario multi-objective robust decision making, as well as an alternative way for scenario discovery and identifying vulnerable scenarios even before any solution generation. To demonstrate and test the novel approach, we use the classic shallow lake problem. We compare the results...

journal article 2021