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Improving the Utilization of Regenerative Energy and Shaving Power Peaks by Railway Timetable Adjustment

Wang, P. (author), Bešinović, Nikola (author), Goverde, R.M.P. (author), Corman, F. (author)

Employing regenerative braking in trains contributes to reducing the amount of energy used, especially when applied to commuter trains and to those used on very dense suburban networks. This paper presents a method to fine-tune the periodic timetable to improve the utilization of regenerative energy and to shave power peaks while maintaining...

journal article 2022

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Impact of Network Topology on the Resilience of Vehicle Platoons

Pirani, Mohammad (author), Baldi, S. (author), Johansson, Karl Henrik (author)

This paper presents a comprehensive study on the impact of information flow topologies on the resilience of distributed algorithms that are widely used for estimation and control in vehicle platoons. In the state of the art, the influence of information flow topology on both internal and string stability of vehicle platoons has been well...

journal article 2022

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ROSE: Robust Searchable Encryption with Forward and Backward Security

Xu, Peng (author), Susilo, Willy (author), Wang, Wei (author), Chen, Tianyang (author), Wu, Qianhong (author), Liang, K. (author), Jin, Hai (author)

Dynamic searchable symmetric encryption (DSSE) has been widely recognized as a promising technique to delegate update and search queries over an outsourced database to an untrusted server while guaranteeing the privacy of data. Many efforts on DSSE have been devoted to obtaining a good tradeoff between security and performance. However, it...

journal article 2022

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Topological Approach to Measure the Recoverability of Optical Networks

Sun, P. (author), He, Z. (author), Kooij, Robert (author), Van Mieghem, P.F.A. (author)

Optical networks are vulnerable to failures due to targeted attacks or large-scale disasters. The recoverability of optical networks refers to the ability of an optical network to return to a desired performance level after suffering topological perturbations such as link failures. This paper proposes a general topological approach and...

journal article 2021

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Efficient MSPSO Sampling for Object Detection and 6D Pose Estimation in 3D Scenes

Xing, Xuejun (author), Guo, Jianwei (author), Nan, L. (author), Gu, Qingyi (author), Zhang, Xiaopeng (author), Yan, Dong Ming (author)

The point pair feature (PPF) is widely used in industrial applications for estimating 6D poses of known objects from unrecognized point clouds. The key to the success of PPF matching is to establish correct 3D correspondences between the object and the scene, i.e., finding as many valid similar point pairs as possible. Thus, a set of...

journal article 2022

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Multi-objective railway timetabling including energy-efficient train trajectory optimization

Scheepmaker, G.M. (author), Goverde, R.M.P. (author)

Energy-efficient train driving is an important topic to railway undertakings (RUs) for sustainability and cost reduction. The timetable affects the possibilities for energy-efficient train driving by the amount of running time supplements, which is the topic of energy-efficient train timetabling (EETT). The scientific literature on EETT...

journal article 2021

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Adaptive Resilience of Complex Safety-Critical Sociotechnical Systems: Toward a Unified Conceptual Framework and Its Formalization

Vert, M.P.J. (author), Sharpanskykh, Alexei (author), Curran, R. (author)

Resilience is commonly understood as the capacity for a system to maintain a desirable state while undergoing adversity or to return to a desirable state as quickly as possible after being impacted. In this paper, we focus on resilience for complex sociotechnical systems (STS), specifically those where safety is an important aspect. Two main...

journal article 2021

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Robustness Analysis of Platoon Control for Mixed Types of Vehicles

Wang, Yixia (author), Lin, Shu (author), Wang, Yibing (author), De Schutter, B.H.K. (author), Xu, Jungang (author)

Currently, with the development of driving technologies, driverless vehicles gradually are becoming more and more available. Therefore, there would be a long period of time during which self-driving vehicles and human-driven vehicles coexist. However, for a mixed platoon, it is hard to control the formation due to the existence of the manual...

journal article 2023

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Robustness assessment of link capacity reduction for complex networks: Application for public transport systems

Cats, O. (author), Koppenol, Gert Jaap (author), Warnier, Martijn (author)

Network robustness refers to as the capacity to absorb disturbances with a minimal impact on system performance. Notwithstanding, network robustness assessment has been mostly confined to the analysis of complete link breakdown based on topological metrics. We propose reliability indicators that encompass changes in network performance with...

journal article 2017

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Design for value change

van de Poel, I.R. (author)

In the value sensitive design (VSD) literature, there has been little attention for how values may change during the adoption and use of a sociotechnical system, and what that implies for design. A value change taxonomy is proposed, as well as a number of technical features that allow dealing with value change.

journal article 2018

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Enhanced interconnection model in geographically interdependent networks

Rueda, Diego F. (author), Calle, Eusebi (author), Wang, X. (author), Kooij, Robert (author)

Interconnection between telecommunication networks and other critical infrastructures is usually established through nodes that are spatially close, generating a geographical interdependency. Previous work has shown that in general, geographically interdependent networks are more robust with respect to cascading failures when the...

journal article 2018

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Incremental Nonlinear Fault-Tolerant Control of a Quadrotor With Complete Loss of Two Opposing Rotors

Sun, Sihao (author), Wang, Xuerui (author), Chu, Q. P. (author), de Visser, C.C. (author)

In order to further expand the flight envelope of quadrotors under actuator failures, we design a nonlinear sensor-based fault-tolerant controller to stabilize a quadrotor with failure of two opposing rotors in the high-speed flight condition (>8 m/s). The incremental nonlinear dynamic inversion approach which excels in handling model...

journal article 2020

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Exploratory modeling for analyzing coupled human-natural systems under uncertainty

Moallemi, Enayat A. (author), Kwakkel, J.H. (author), de Haan, Fjalar J. (author), Bryan, Brett A. (author)

Modeling is a crucial approach for understanding the past and exploring the future of coupled human-natural systems. However, uncertainty in various forms challenges inferences from modeling results. Model-based support for decision-making has increasingly adopted an emerging exploratory approach. This approach addresses uncertainty...

journal article 2020

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Robust tube-based model predictive control with Koopman operators

Zhang, Xinglong (author), Pan, W. (author), Scattolini, Riccardo (author), Yu, Shuyou (author), Xu, Xin (author)

Koopman operators are of infinite dimension and capture the characteristics of nonlinear dynamics in a lifted global linear manner. The finite data-driven approximation of Koopman operators results in a class of linear predictors, useful for formulating linear model predictive control (MPC) of nonlinear dynamical systems with reduced...

journal article 2022

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Making sense of resilience

Cañizares Gaztelu, J.C. (author), Copeland, S.M. (author), Doorn, N. (author)

While resilience is a major concept in development, climate adaptation, and related do-mains, many doubts remain about how to interpret this term, its relationship with closely overlap-ping terms, or its normativity. One major view is that, while resilience originally was a descriptive concept denoting some adaptive property of ecosystems,...

journal article 2021

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Evaluating the Robustness of Water Quality Sensor Placement Strategies of Water Distribution Systems Considering Possible Sensor Failures and System Changes

Zheng, Zixuan (author), Zheng, Feifei (author), Bi, Weiwei (author), Du, Jiawen (author), Duan, Huan-Feng (author), Savić, Dragan (author), Kapelan, Z. (author)

An early contamination warning system with deployed water quality sensors is often used to enhance the safety of a water distribution system (WDS). While algorithms have been developed to select an optimal water quality sensor placement strategy (WQSPS) for WDSs, many of them do not account for the influences caused by future uncertainties,...

journal article 2022

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A novel supply chain network evolving model under random and targeted disruptions

Wang, Jiepeng (author), Zhou, Hong (author), Sun, Xinlei (author), Yuan, Y. (author)

Due to the fact that there is a lack of comprehensive understanding of how the dynamic nature of supply chain networks (SCNs) interrelates with network structures, particularly network topologies under disruptions. This research employs a novel evolving model of a supply chain network (SCNE model) by modifying the Barabási and Albert (BA)...

journal article 2023

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Regenerative economics at the service of islands: Assessing the socio-economic metabolism of Samothraki in Greece

Zisopoulos, Filippos K. (author), Noll, Dominik (author), Singh, Simron J. (author), Schraven, D.F.J. (author), de Jong, Martin (author), Fath, Brian D. (author), Goerner, Sally (author), Webster, Ken (author), Fiscus, Dan (author), Ulanowicz, Robert E. (author)

For many islands, the answer to the question “why a locally, self-sustaining, and regenerative economy is needed?” is clear. The struggle often lies in the “how”. Here, we argue that tools from regenerative economics, which follow an island economy-as-an-organism analogy, offer valuable and complementary insights to socio-metabolic research....

journal article 2023

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Algorithms for partially robust team formation

Schwind, Nicolas (author), Demirović, E. (author), Inoue, Katsumi (author), Lagniez, Jean Marie (author)

In one of its simplest forms, Team Formation involves deploying the least expensive team of agents while covering a set of skills. While current algorithms are reasonably successful in computing the best teams, the resilience to change of such solutions remains an important concern: Once a team has been formed, some of the agents considered...

journal article 2023

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Opportunities of Natural Resources Making Buildings More Resilient

van den Engel, P.J.W. (author)

An overview is given of the state-of-the-art of natural and hybrid ventilation in buildings in general. The focus of this paper is on boundary conditions for openable windows. As a case study the Co Creation Centre at the TU-Delft is discussed. Occupants live in their own houses and often in an office or other working environments as well. Due...

journal article 2024