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44th Annual Meeting of the Cognitive Science Society: Cognitive Diversity, CogSci 2022

作者： Duggins, Peter Eliasmith, Chris Stewart, Terrence C. Computational Neuroscience Research Group Department of Systems Design Engineering University of Waterloo Canada

Social environments often impose tradeoffs between pursuing personal goals and maintaining a favorable reputation. We studied how individuals navigate these tradeoffs using Reinforcement Learning (RL), paying particular attention to the role of social value orientation (SVO). We had human participants play an interated Trust Game against various software opponents and analyzed the behaviors. We then incorporated RL into two cognitive models, trained these RL agents against the same software opponents, and performed similar analyses. Our results show that the RL agents reproduce many interesting features in the human data, such as the dynamics of convergence during learning and the tendency to defect once reciprocation becomes impossible. We also endowed some of our agents with SVO by incorporating terms for altruism and inequality aversion into their reward functions. These prosocial agents differed from proself agents in ways that resembled the differences between prosocial and proself participants. This suggests that RL is a useful framework for understanding how people use feedback to make social decisions. © 2022 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY)

关键词： Reinforcement learning

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The Price of a Safe Flight: Risk Cost Based Path Planning

The Price of a Safe Flight: Risk Cost Based Path Planning

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Aliaksei Pilko Andy Oakey Mario Ferraro James Scanlan Computational Engineering and Design Group University of Southampton Southampton UK Transportation Research Group University of Southampton Southampton UK

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

A risk aware UAS path planning methodology is proposed using monetary value as the sole cost metric. A third party ground risk model is used to generate a non-uniform costmap for a modified A* heuristic search. The Value of a Prevented Fatality provides a basis to convert fatality risk to monetary value terms as a Human Value at Risk (HVaR) measure. Additional operating and UAS Capital Value at Risk (CVaR) costs are modelled to provide a holistic monetary cost model for path cost minimisation. A number of future cost variants are investigated based upon prior work for a realistic urban-rural mix logistics case study in Southern England. Results show increasingly risk averse paths with decreasing future UAS operating costs.

关键词： Measurement Reactive power Costs Probabilistic logic Minimization Path planning Robotics and automation

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Development of nonlinear control strategies for a fully electric high-speed passenger vessel

Development of nonlinear control strategies for a fully elec...

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IEEE Colombian Conference on Automatic Control (CCAC)

作者： Felipe Mendoza Juan David Núñez Tatiana Manrique Ricardo Mejía-Gutiérrez Design Engineering Research Group (GRID) Universidad EAFIT Medellín Colombia Computational Intelligence and Automatics Research Group (GIICA) Universidad EIA Envigado Colombia EnergEIA Research Group Universidad EIA Envigado Colombia

Vessel electrification presents itself as a low-fuel consumption solution for inland waterways transportation. However, electric vessels must cope with challenges regarding the limited energy available in the batteries and how to use it properly to achieve the route to cover. As an energy management strategy, velocity control is proposed for a twelve-passenger electric vessel covering the Magangué-Pinillos-Conyongal route in Magdalena River, Colombia. Velocity control of vessels faces many challenges due to vessel hydrodynamics nonlinearities and uncertainties. The present work evaluates several nonlinear velocity control strategies, such as Gain-scheduling Model predictive control, Adaptive Model predictive control, and Sliding mode control. Dynamics uncertainties are not considered. From the results obtained, it can be established that the Sliding mode control (SMC) is the simplest to implement and has the best performance regarding energy consumption. Next, the Gain-scheduling control approach is smoother than the SMC but requires more computational effort and knowledge of the system. Finally, the Adaptive approach is better at reducing errors but has the highest computational effort.

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Neural Network-Based Distributed Denial of Service (DDoS) Attack Detection in Smart Home Networks 6

Neural Network-Based Distributed Denial of Service (DDoS) At...

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6th Smart Cities Symposium, SCS 2022

作者： Ahamed, Ismeil Ahmad, Farhan Palade, Vasile Ahmed, Abdullahi Systems Security Group Centre for Future Transport and Cities Coventry University United Kingdom Centre for Computational Science and Mathematical Modelling Coventry University United Kingdom School of Engineering Technology and Design Canterbury Christ Church University United Kingdom

ISBN: (纸本)9781839538544

Due to various limitations, such as limited power supply, the lack of storage capability and processing power, Internet of Things-based smart home networks have become vulnerable to various cyber-security attacks including Distributed Denial of Service (DDoS) attacks. These attacks are a malicious attempt to exhaust and overwhelm the target system resources, which has significant impact on the operation of smart home net- works. This paper proposes a novel, efficient and lightweight DDoS attack detection scheme in smart home networks, which employs artificial neural networks (ANN) to classify smart home networks traffic into DDoS attacks or normal traffic. The proposed solution is evaluated on four datasets, namely, IoT-23, DS2OS, NUSW-NB15GT and CICDDOS2019. Experiments were conducted on two types of ANN models, i.e., Multilayered Perceptron (MLP) and Long-Short-Term Memory (LSTM), which achieved 99.78% and 99.98% accuracy, respectively. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Internet of things

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Investigation of the mesmeric effect of substituents in DSSC based on thiophene and oxadiazole. Structural and optoelectronic study using the DFT approach

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Interactions 2025年第1期246卷 1-15页

作者： Agda, Fatima Nebbach, Diae Louazri, Latifa Ninis, Ouafae Merimi, Imane Ajana, Mohammed Aziz Bouachrine, Mohammed Laboratory Molecular and Computational Chemistry: Design Synthesis and Reactivity. Department of Chemistry Faculty of Science Moulay Ismail University Meknes Morocco Regional Center for Education and Training Professions Meknes Morocco Energy Materials and Computing Physics Research Group ENS Abdelmalek Essaadi University Tetouan Morocco Advanced Materials and Process Engineering Laboratory Faculty of Science Ibn Tofail University Kenitra Morocco National School of Architecture National Road N2 Compus de Savoir Technolopole Oujda Oujda60000 Morocco Faculty of Sciences Mohammed First University Oujda Morocco

In this work, we have developed a range of organic Donor- π -Acceptor;we are changing the π-spacers by adding novel substitutions (F, CH3, and CN) to the base molecule D-TTOxTT-A for dye-sensitized solar cells (DSSCs). Our aim is to improve the photovoltaic performance of these engineered organic dyes. We use the B3LYP (d,p) and TD/CAM-B3LYP (d,p) to study the impact of different types of the introduction of the substitution in the spacer, on the sensitizer characteristics, with the aim of highlighting the links between structure and property. Based on these results, it is possible to use these dyes as promising sensitizers for DSSCs. In addition, M4 could be an ideal compound for high throughput DSSC due to its planar geometry, low energy gap (1.73eV), higher absorption wavelength (449.3nm), longer lifetime (2.366 ns), lower ΔGreg (-0.64 eV), large hardness (-0.869 eV) and reasonable energy reorganization (0.488eV). © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Thiophene

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Chlorine Worth Study and Nuclear Data

Chlorine Worth Study and Nuclear Data

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2024 Annual Conference on Transactions of the American Nuclear Society, ANS 2024

作者： Thompson, Nicholas W. Cutler, Theresa Amundson, Kelsey Favorite, Jeffrey A. Grove, Travis Hutchinson, Jesson Kleedtke, Noah Advanced Nuclear Technology Group Nuclear Engineering and Nonproliferation Division Los Alamos National Laboratory P.O. Box 1663 Los AlamosNM87545 United States Radiation Transport Applications Group X-Theoretical Design Division Los Alamos National Laboratory P.O. Box 1663 Los AlamosNM87545 United States Monte Carlo Methods Codes and Applications Group X-Computational Physics Division Los Alamos National Laboratory P.O. Box 1663 Los AlamosNM87545 United States

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Conformational Folding Activates Photoinduced Electron Transfer

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CCS Chemistry 2024年第11期6卷 2804-2813页

作者： Shiqing Huang Syed Ali Abbas Abedi Zhifeng Li Rongrong Huang Xiaoyu Yan Mohammad Izadyar Qinglong Qiao Yu Fang Zhaochao Xu Xiaogang Liu Fluorescence Research Group Singapore University of Technology and DesignSingapore 487372 School of Chemistry and Life Resources Renmin University of ChinaBeijing 100872 CAS Key Laboratory of Separation Science for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 Research Center for Modeling and Computational Sciences Faculty of ScienceFerdowsi University of MashhadMashhad *** Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education) School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’anShaanxi 710119

Photoinduced electron transfer(PET)is a critical process in many functional materials,underpinning various technological applications(i.e.,fluorescent probes and photocatalysts).Despite its signifi-cance,the detailed structural dynamics of PET,particularly during the excited state,remain poorly *** study investigates the mechanisms of conformational folding and their implications for activating PET in molecular systems characterized by a fluorophore-spacer-receptor *** demonstrate that traditional computational models,primarily based on frontier molecular orbitals,often fall short in capturing these conformational dynamics,leading to inadequate explanations of PET *** the incorporation of conformational folding,our computational model has achieved excellent agreement with experimental data,thereby resolving several long-standing debates on PET *** mechanistic advancement not only deepens our understanding of PET but also opens new avenues for designing advanced functional *** have thus successfully demonstrated the imaging of lysosomes in live cells using a PET probe.

关键词： Photoinduced electron transfer conformational folding bioimaging excited-state dynamics advanced materials

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muco: A MUSIC COMPUTING LEARNING APPLICATION 19

muco: A MUSIC COMPUTING LEARNING APPLICATION

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19th Sound and Music Computing Conference, SMC 2022

作者： Hu, Patricia Hödl, Oliver Reichl, Peter Kayali, Fares Eibensteiner, Iris Taufner, Bernhard Schefer-Wenzl, Sigrid Miladinovic, Igor Cooperative Systems Research Group University of Vienna Austria Centre for Teacher Education University of Vienna Austria Software Design and Engineering Department University of Applied Sciences Campus Vienna Austria Institute of Computational Perception Johannes Kepler University Linz Austria

ISBN: (纸本)9782958412609

Following a computational approach to music creation can serve as a transdisciplinary bridge between computer science, music and education by providing rich opportunities for teaching computing skills in interdisciplinary contexts. Making use of such learning contexts is one of the cornerstones of STEAM (STEM + Arts) education, a pedagogic approach focusing on integrating the arts and humanities into STEM fields. Despite numerous benefits reported in the literature, the number of STEAM programs integrated into formal learning contexts remains limited due to various integration challenges. In addressing these challenges, we developed and evaluated a gamified music computing learning application called muco, using the MVC software architecture along with React as the front-end, and Node and MariaDB as back-end technologies. The goal of the application is to make programming concepts more accessible and comprehensible to a broader public, and to simultaneously spark interest in music and music making. Making use of game mechanics, muco is conceptualised to teach computational thinking, and more specifically, introductory programming, in non-formal learning contexts. The usability of the application and impact of interdisciplinary learning is evaluated by means of both formative and summative testing. Results show that the application provides an engaging learning environment which encourages the exploration of both the computing and music domain. Copyright: © 2022 Hu P. et al.

关键词： Application programs

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Prediction and validation of aeroelastic limit cycle oscillations using harmonic balance methods and Koopman operator

Research Square

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Research Square 2025年

作者： McGurk, Michael Yuan, Jie Aerospace Centre of Excellence Department of Mechanical and Aerospace Engineering University of Strathclyde GlasgowG1 1XQ United Kingdom Computational Engineering Design Group Department of Aeronautics and Astronautics Engineering University of Southampton SouthamptonSO17 1BJ United Kingdom

The presence of nonlinearities within aerospace systems often triggers self-sustaining oscillations known as Limit Cycle Oscillations (LCO), demanding costly analysis for identification, notably through the resource-intensive generation of bifurcation diagrams. Consequently, the expense incurred tends to sideline nonlinear analysis in initial design phases, constraining design possibilities and impeding data-driven methods for nonlinear aeroelastic analysis reliant on efficient data collection, which has garnered attention in the aerospace sector. This work proposes a computationally efficient numerical framework for calculating LCO amplitudes and determining stability in nonlinear aeroelastic systems. The framework consists of using Harmonic Balance Methods (HBM) combined with the Hill method for the stability analysis. To avoid the sorting problem, the Koopman operator-based data-driven method is implemented. The methodology is applied to numerical test cases, encompassing both smooth and nonsmooth nonlinearities, and validated against outcomes from MATCONT and COCO. Subsequently, an experimental validation of the framework is conducted, comparing its outcomes to existing LCO experimental data acquired through control-based continuation experiments. © 2025, CC BY.

关键词： Bifurcation (mathematics)

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Finite Element and Isogeometric Stabilized Methods for the Advection-Diffusion-Reaction Equation

SSRN

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SSRN 2023年

作者： Key, Konstantin Abdelmalik, Michael R.A. Elgeti, Stefanie Hughes, Thomas J.R. Baidoo, Frimpong A. Institute for Lightweight Design and Structural Biomechanics TU Wien Austria Department of Mechanical Engineering Eindhoven University of Technology Netherlands Computational Mechanics Group Oden Institute UT Austin United States Chair for Computational Analysis of Technical Systems RWTH Aachen University Germany

We develop two new stabilized methods for the steady advection-diffusion-reaction equation, referred to as the Streamline GSC Method and the Directional GSC Method. Both are globally conservative and perform well in numerical studies utilizing linear, quadratic, cubic, and quartic Lagrange finite elements and maximally smooth B-spline elements. For the streamline GSC method we can prove coercivity, convergence, and optimal-order error estimates in a strong norm that are robust in the advective and reactive limits. The directional GSC method is designed to accurately resolve boundary layers for flows that impinge upon the boundary at an angle, a long-standing problem. The directional \acrshort{GSC} method performs better than the streamline \acrshort{GSC} method in the numerical studies, but it is not coercive. We conjecture it is inf-sup} stable but we are unable to prove it at this time. However, calculations of the inf-sup constant support the conjecture. In the numerical studies, B-spline finite elements consistently perform better than Lagrange finite elements of the same order and number of unknowns. © 2023, The Authors. All rights reserved.

关键词： Boundary layers

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