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Modelling and simulation of energy management of power-split hybrid electric vehicles using the discrete EVent system specification

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International Journal of Vehicle Systems Modelling and Testing 2024年第1期18卷 33-61页

作者： Maatoug, Abdelfettah Kharoubi, Sahraoui Maaskri, Moustafa Belalem, Ghalem Mahmoudi, Said Faculty of Applied Sciences Science and Technology Department University of Tiaret Tiaret14000 Algeria Faculty of Mathematics and Computer Science Computer Science Department University of Tiaret Tiaret14000 Algeria Faculty of Applied Sciences Electrical Engineering Department University of Tiaret Tiaret14000 Algeria Faculty of Exact and Applied Sciences Computer Science Department University of Oran 1 Ahmed Ben Bella Oran31000 Algeria Faculty of Engineering Computer Science Department University of Mons Mons7000 Belgium

This work provides a basis for studying energy management optimisation in power-split hybrid electric vehicles (PSHEVs) to reduce fuel consumption and increase powertrain efficiency by enforcing a strategy related to battery level and vehicle speed. Three modes were used to operate the vehicle to meet different situations related to available energy and desired speed. These are particularly abundance mode, ascetic mode and optimal mode. For this, a system was designed based on several sub-models written in the discrete EVent system (DEVS) specification. The vehicle's power train and control strategy models were created in the DEVSimPy environment, and a joint simulation was carried out from the composite sub models until the overall model is reached. Simulation results under several driving cycles showed that the proposed system improves the energy consumption of the vehicle in different operating modes of the engines and gives more opportunities to adopt electric motors in vehicle transmission. © 2024 Inderscience Enterprises Ltd.

关键词： Energy management

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Optimal Rooftop Solar Penetration for Voltage Sag Reduction in Small-Scale Distribution Network

Optimal Rooftop Solar Penetration for Voltage Sag Reduction ...

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2024 IEEE Calcutta Conference, CALCON 2024

作者： Bhattacharjee, Dipanwita Sur, Ujjal Biswas, Amitava Institute of Engineering & Management Department of Electrical Engineering Kolkata India University of Delhi Department of Electrical Engineering New Delhi India University of Calcutta Department of Applied Physics Kolkata India

ISBN: (纸本)9798331516666

PV installations on rooftops are essential for increasing PV penetration in distribution networks. Rooftop solar power plants, especially that lack energy storage, seem more affordable than traditional fossil fuel-based power. But when in a distribution system share of solar PV grows, worries about voltage sagging surface, particularly in situations with modest loads. Because of their high RX ratio, beneath-the-ground cable-based distribution systems have a more severe version of this problem, which could result in less solar PV generation. To determine the maximum rooftop PV penetration that is permitted without going above voltage constraints, we created an IEEE 33-bus distribution system in MATLAB for this project. Next, to study the impacts of voltage sagging, the same IEEE 33-bus network was transformed into a cable-based distribution system. After comparing IEEE 33 bus systems that are overhead-based with those that are cable-based, we discovered that cable-based networks had a lower maximum permitted rooftop PV penetration. Voltage instability may emerge from a metropolitan cable-based system's rooftop PV penetration being increased mindlessly, according to simulation data. To guarantee the sustainable integration of PV systems without impacting network stability, careful planning is necessary. © 2024 IEEE.

关键词： MATLAB

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QUBO Models for the FIFO Stack-Up Problem and Experimental Evaluation on a Quantum Annealer

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SN computer Science 2024年第7期5卷 1-15页

作者： Gebler, Colin Rethmann, Jochen Ueberholz, Peer Department of Electrical Engineering and Computer Science Niederrhein University of Applied Sciences Reinarzstr. 49 Krefeld 47805 Germany

Quantum annealing has been applied to combinatorial optimization problems in recent years. In this paper we study the possibility to use quantum annealing for solving the combinatorial FIFO Stack-Up problem, where bins have to be stacked-up from a conveyor belt onto pallets. The problem is NP-hard and can be solved using linear programming approaches. We developed two QUBO (quadratic unconstrained binary optimization) objective functions based on a bin stack-up solution and a pallet stack-up solution for this problem suitable for a quantum annealer. The number of variables was minimized to increase the performance and their dependence on the number of bins and pallets was discussed. The performances of both methods were studied for various small problem sizes on a D-Wave quantum annealer. We found that only tiny instances could be solved and looked at the terms of the QUBO-formulations, which cause the quantum annealer to fail for larger problem sizes. Furthermore we compare the results to the performance of a classic computer using the same QUBO-formulations. © The Author(s) 2024.

关键词： FIFO Stack-Up problem NP-hard Quantum annealer QUBO formulation

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Implications of the electron-phonon coupling in CuPb9(PO4)6O for superconductivity: An ab initio study

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Physical Review Materials 2024年第1期8卷 L011801-L011801页

作者： Hari Paudyal Michael E. Flatté Durga Paudyal Department of Physics and Astronomy University of Iowa Iowa City Iowa 52242 USA Ames National Laboratory of the US DOE Iowa State University Ames Iowa 50011 USA Department of Applied Physics Eindhoven University of Technology Eindhoven 5612 AZ The Netherlands Department of Electrical and Computer Engineering Iowa State University Ames Iowa 50011 USA

We report ab initio calculations of the electronic and vibrational properties in CuPb9(PO4)6O, including the electron-phonon coupling strength via strong-coupling Migdal-Eliashberg theory. We verify the presence of appealing flat electronic bands near the Fermi level, a strong hybridization between the Cu 3d and O 2p states, and soft low-energy phonons, which can suggest high-temperature superconducting behavior. However, the electron-phonon coupling strength appears insufficient to overcome the Coulomb repulsion between an electron pair and thus does not support high-temperature superconductivity in CuPb9(PO4)6O via the conventional electron-phonon Migdal-Eliashberg mechanism. Even neglecting Coulomb repulsion of the electron pair we find this electron-phonon coupling suggests a superconducting transition temperature of less than 2 K.

关键词： Electron-phonon coupling Electronic structure Phonons Superconductivity Density functional theory Eliashberg theory

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Enhancing the Performance of Perovskite Light-Emitting Diodes via Synergistic Effect of Defect Passivation and Dielectric Screening

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Nano-Micro Letters 2024年第10期16卷 244-256页

作者： Xuanchi Yu Jia Guo Yulin Mao Chengwei Shan Fengshou Tian Bingheng Meng Zhaojin Wang Tianqi Zhang Aung Ko Ko Kyaw Shuming Chen Xiaowei Sun Kai Wang Rui Chen Guichuan Xing Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao 999078People's Republic of China Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055People's Republic of China

Metal halide perovskites,particularly the quasi-two-dimensional perovskite subclass,have exhibited considerable potential for next-generation electroluminescent materials for lighting and ***,the presence of defects within these perovskites has a substantial influence on the emission efficiency and durability of the *** this study,we revealed a synergistic passivation mechanism on perovskite films by using a dual-functional compound of potassium *** dual functional potassium bromide on the one hand can passivate the defects of halide vacancies with bromine anions and,on the other hand,can screen the charged defects at the grain boundaries with potassium *** approach effectively reduces the probability of carriers quenching resulting from charged defects capture and consequently enhances the radiative recombination efficiency of perovskite thin films,leading to a significant enhancement of photoluminescence quantum yield to near-unity values(95%).Meanwhile,the potassium bromide treatment promoted the growth of homogeneous and smooth film,facilitating the charge carrier injection in the ***,the perovskite light-emitting diodes based on this strategy achieve a maximum external quantum efficiency of~21%and maximum luminance of~60,000 cd m^(-2).This work provides a deeper insight into the passivation mechanism of ionic compound additives in perovskite with the solution method.

关键词： Synergistic passivation strategy Defects passivation Dielectric screening Perovskite light-emitting diodes

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Highly Efficient Three-Level AC-AC Converter with Identical In-Phase and Antiphase Buck-Boost Operations

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IEEE Transactions on Power Electronics 2024年第8期39卷 9929-9942页

作者： Ahmed, Hafiz Furqan Khan, Ashraf Ali Al Zaabi, Omar Mousavi, Seyyed Mohammad Javad Babaei, Ebrahim National Sun Yat-Sen University Department of Electrical Engineering Kaohsiung804 Taiwan Memorial University of Newfoundland Department of Electrical and Computer Engineering Faculty of Engineering and Applied Science St. John'sNLA1C 5S7 Canada Khalifa University Advanced Power and Energy Center Department of Electrical Engineering and Computer Science Abu Dhabi127788 United Arab Emirates University of Tabriz Faculty of Electrical and Computer Engineering Tabriz51666 Iran Near East University Engineering Faculty Nicosia99138 Turkey

In this article, a new coupled-inductors based three-level bipolar buck-boost ac-ac converter is proposed. The proposed converter can produce highly efficient and symmetric in-phase and antiphase buck and boost modes of operation with much lower component voltage and current stresses. This reduces the operation and design complexity, and helps to achieve a high-efficiency operation. The high-frequency modulating switches of the proposed converter are implemented with coupled-inductor-based dual-buck phase leg, producing three-level input and output voltages, and providing inherent protection from voltage-source short-circuit issue during switch transitions. The other salient features of the proposed converter are no-commutation issue, no need for RC snubbers or dedicated safe-commutation algorithms, provision of high-quality and continuous input/output currents, and support for nonresistive loads. An in-depth circuit analysis of the proposed converter is provided based on the proposed switch modulation strategies. The guidelines for component design/selection are discussed, followed by the comparisons with state-of-the-art three-level ac-ac converters. Finally, practical circuit verifications are performed on a laboratory-assembled prototype. © 1986-2012 IEEE.

关键词： Buck-Boost converter

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Learned, uncertainty-driven adaptive acquisition for photon-efficient scanning microscopy

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Optics Express 2025年第6期33卷 12269-12287页

作者： Ye, Cassandra Tong Han, Jiashu Liu, Kunzan Angelopoulos, Anastasios Griffith, Linda Monakhova, Kristina You, Sixian The Department of Electrical Engineering and Computer Science CambridgeMA02139 United States Fu Foundation School of Engineering and Applied Science Columbia University in The City of New York New YorkNY10027 United States University of California Berkeley Department of Electrical Engineering and Computer Science BerkeleyCA94720 United States Department of Biological Engineering Massachusetts Institute of Technology CambridgeMA02139 United States

Scanning microscopy systems, such as confocal and multiphoton microscopy, are powerful imaging tools for probing deep into biological tissue. However, scanning systems have an inherent trade-off between acquisition time, field of view, phototoxicity, and image quality. This often results in noisy measurements when fast, large field of view, and/or gentle imaging is needed. Deep learning could be used to denoise noisy microscopy measurements, but these algorithms can be prone to hallucination, which can be disastrous for medical and scientific applications. We propose a method to simultaneously denoise and predict pixel-wise uncertainty for scanning microscopy systems, improving algorithm trustworthiness and providing statistical guarantees for deep learning predictions. Furthermore, we propose to leverage this learned, pixel-wise uncertainty to drive an adaptive acquisition technique that rescans only the most uncertain regions of a sample, saving time and reducing the total light dose to the sample. We demonstrate our method on experimental confocal and multiphoton microscopy systems, showing that our uncertainty maps can pinpoint hallucinations in the deep learned predictions. Finally, with our adaptive acquisition technique, we demonstrate up to 16× reduction in acquisition time and total light dose while successfully recovering fine features in the sample and reducing hallucinations. We are the first to demonstrate distribution-free uncertainty quantification for a denoising task with real experimental data and the first to propose adaptive acquisition based on reconstruction uncertainty. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Pixels

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First thrust measurements in ionic multi-propeller rotational engines

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Propulsion and Power Research 2023年第1期12卷 44-58页

作者： Adrian Ieta Marius Chirita Electrical and Computer Engineering Department SUNY OswegoOswegoNY 13126-3599USA Applied Physics/Condensed Matter Department National Institute for Research and Development in Electrochemistry and Condensed MatterTimisoaraRO-300224Romania

Rotary ionic engines(RIEs)with multi-coaxial contra-rotating propellers(12.6 cm diameter)and their axial thrust are investigated in laboratory conditions,in air at atmospheric pressure,for the first *** goal is to evaluate more advantageous configurations that may be scaled up and further help with development of rotary ionic *** propellers are designed with regular pin-emitter electrodes placed coaxially inside a cylindrical collector *** high voltage is applied,propellers spin generating conventional axial thrust which is measured with an electronic scale in a“see-saw”*** to 40 mN thrust was obtained in single propeller RIE at 2600 rpm,0.34 mA,37.5 kV,and an optimal collector electrode diameter of 17 *** thrust can be obtained with two and three propellers at constant current per propeller but at a decreased *** the axial propeller-separation showed that propeller-interaction is minimal above 5 ***-to-power and thrust-tocurrent ratios were calculated and *** experimentally confirm here for the first time that within certain limits,the thrust-to-power variation can be assessed by the propeller kinetic energy-to-power ratio and also by the impedance of the gap(voltage-to-current ratio).A comparison of RIE arrays performance with one,two,and three coaxial propellers and the same total number of propellers per array(six)is also *** arrays with multi-coaxial propellers can provide larger thrust densities than single-propeller ***,arrays employing two coaxial propeller unit may be more weight effective.

关键词： Ionic wind EHD pump Electrohydrodynamics Corona discharge Thrust-to-power Propeller Ion propulsion Plasma thrusters Electroaerodynamic thrusters Ionocraft

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physics-guided hierarchical Neural Networks for Maxwell's equations in metamaterials

Physics-guided hierarchical Neural Networks for Maxwell's eq...

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CLEO: Fundamental Science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lynch, Sean LaMountain, Jacob Fan, Bo Bu, Jie Raju, Amogh Wasserman, Daniel Karpatne, Anuj Podolskiy, Viktor Department of Physics and Applied Physics University of Massachusetts LowellMA01854 United States Department of Computer Science Virginia Tech U VA United States Department of Electrical and Computer Engineering University of Texas AustinTX78758 United States

We develop a hierarchical approach to building a physics-guided neural network (PGNN) for scalable solutions of Maxwell equations with high spatial resolution and illustrate the developed formalism on a metamaterial p... 详细信息

ISBN: (纸本)9781957171395

关键词： Maxwell equations

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Estimating Risk-aware Flexibility Areas for Electric Vehicle Charging Pools via AC Stochastic Optimal Power Flow

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Journal of Modern Power Systems and Clean Energy 2023年第4期11卷 1247-1256页

作者： Juan S.Giraldo Nataly Bañol Arias Pedro P.Vergara Maria Vlasiou Gerwin Hoogsteen Johann L.Hurink Energy Transition Studies Group Netherlands Organisation for Applied Scientific Research(TNO)Amsterdam1043 NTThe Netherlands Department of Electrical Engineering Mathematics and Computer ScienceUniversity of TwenteEnschede7522 NBThe Netherlands Intelligent Electrical Power Grids Group Electrical EngineeringMathematics and Computer ScienceDelft University of TechnologyDelft2628 CDThe Netherlands

This paper introduces an AC stochastic optimal power flow(SOPF)for the flexibility management of electric vehicle(EV)charging pools in distribution networks under *** AC SOPF considers discrete utility functions from charging pools as a compensation mechanism for eventual energy not served to their charging *** application of the AC SOPF is described where a distribution system operator(DSO)requires flexibility to each charging pool in a day-ahead time frame,minimizing the cost for flexibility while guaranteeing technical *** areas are defined for each charging pool and calculated as a function of a risk parameter involving the uncertainty of the *** show that all players can benefit from this approach,i.e.,the DSO obtains a riskaware solution,while charging pools/tasks perceive a reduction in the total energy payment due to flexibility services.

关键词： Electric vehicle flexibility management stochastic optimal power flow(SOPF) risk awareness compensation mechanism

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