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Microwave processing of carbon doped Nickel-Cobalt composites for high-performance supercapacitors

Materials Today: Proceedings 2022年 67卷 1005-1009页

作者： Kumar, Niraj Bhusan Sahoo, Bibhuti Kumar Sahoo, Naresh Soam, Ankur Kumar, Rahul Dash, Barada P. Kumar Sahoo, Prasanta Maharashtra Pune 411025 India Department of Mechanical Engineering Siksha ‘O’ Anusandhan Deemed to be University Odisha Bhubaneswar 751030 India Department of Chemistry Environmental Science and Technology Program Siksha ‘O’ Anusandhan Deemed to be University Odisha Bhubaneswar 751030 India Department of Energy Science and Engineering IIT Delhi New Delhi 110016 India

A facile and rapid microwave synthesis method was used to make Co/Ni-carbon black (CB) nanocomposites. Several sophisticated techniques confirm the formation and the effects of carbon nanoparticles incorporated into Co/Ni-CB composites. Carbon engrafted Co/Ni composite demonstrates excellent morphology, more significant area, and higher conductive region, thus improving electrode/electrolyte accessibility to enhance electrochemical kinetics. The interaction and combination of CB with Co/Ni composite shows excellent capacitive behavior, assessed by galvanostatic discharge method, cyclic voltage voltammetry, and electrochemical impedance spectroscopy. CB plays a crucial role in stimulating the formation of robust structures, surface activity, and specific capacitance through enhancing electron transport and catalytic properties. This electrode material (NX3) has the highest specific capacitance of 748 Fg−1 at scan rates of 5 mVs−1 and was found to have excellent cycle stability (92.8%) over 5000 cycles. Solid-state supercapacitors fabricated from developed electrodes are highly effective for brightening LEDs. In this study, we demonstrated for the first time a single-step technique that is both quick and efficient for the synthesis of Co/Ni-carbon black heterostructure by using microwave irradiation. The present work suggests that low-cost electrodes can be used in a wide range of future energy storage systems as a potential hybrid material. © 2022

关键词： Nickel

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Acquiring feedback into the manufacturing process design from Industrial policies

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Procedia CIRP 2024年 128卷 579-584页

作者： Alexios Papacharalampopoulos Manolis Toupalis Panagiotis Lagios Olga Maria Karagianni Panagiotis Stavropoulos Laboratory for Manufacturing Systems and Automation (LMS) Department of Mechanical Engineering and Aeronautics University of Patras Rio Patras 26504 Greece Gizelis Robotics Schimatari Viotias 32009 Kormatzini Area Greece

The regulatory and social framework of European industry can be demanding, i.e. in terms of achieving different strategies, such as Industry 4.0 and Industry 5.0. To study this co-existence of strategies, a circular cell is utilized herein. It has been implemented based on a specific design, meeting requirements for an automotive microfactory and under the concept of circular economy. The objective of the cell has been to address resources efficiency and partial digitalization of workflows towards human-in-the-loop remanufacturing parts of electric vehicles. The process chain includes removal and joining processes, the processed part has been of medium complexity, and the workflow has engaged several digital tools, as a result of the quality monitoring requirements. The cell has been operational and various qualitative metrics have been elaborated. Subsequently, feedback is extracted towards the design for future applications pertaining to both circular economy and Industry 5.0. As such, in addition to the environmental sustainability implied by the resources efficiency, the production resilience and the human-centricity of the jobs involved are also regarded as extra requirements. Also, the connection to the ecosystem is taken into consideration. Finally, guidelines for future designs are also extracted.

关键词： Manufacturing process Cell Industry 5.0 application design criteria

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Spherical Cubic Blends: $\mathcal{C}^{2}$-Continuous, Zero-Clamped, and Time-Optimized Interpolation of Quaternions

Spherical Cubic Blends: $\mathcal{C}^{2}$-Continuous, Zero-C...

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IEEE International Conference on robotics and Automation (ICRA)

作者： Jonas Wittmann Lukas Cha Marco Kappertz Philipp Seiwald Daniel J. Rixen Department of Mechanical Engineering Technical University of Munich TUM School of Engineering and Design Munich Institute of Robotics and Machine Intelligence (MIRMI) Garching Germany

Modern collaborative robotic applications require robot motions that are predictable for human coworkers. Therefore, trajectories often need to be planned in task space rather than configuration space ( $\mathcal{C}$ -space). While the interpolation of translations in Euclidean space is straightforward, the interpolation of rotations in $SO(3)$ is more complex. Most approaches originating from computer graphics do not exhibit the often desired $\mathcal{C}^{2}$ -continuity in robotics. Our main contribution is a $\mathcal{C}^{2}$ -continuous, zero-clamped interpolation scheme for quaternions that computes a fast synchronized motion given a set of waypoints. As a second contribution, we present modifications to two state-of-the-art quaternion interpolation schemes, Spherical Quadrangle Interpolation (SQUAD) and Spherical Parabolic Blends (SPB), to enable them to compute $\mathcal{C}^{2}$ -continuous, zero-clamped trajectories. In experiments, we demonstrate that for the time optimization of trajectories, our approach is computationally efficient and at the same time computes smooth trajectory profiles.

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REDUCED ORDER MODEL FOR MICRO-SCALE PERMEABILITY PREDICTION OF A FIBRE TOW 20

REDUCED ORDER MODEL FOR MICRO-SCALE PERMEABILITY PREDICTION ...

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20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022

作者： Kandinskii, Roman Desmet, Wim Naets, Frank Swolfs, Yentl Lomov, Stepan V. Department of Materials Engineering Ku Leuven Belgium Sim M3 Program Belgium Department of Mechanical Engineering Ku Leuven Belgium Dmms Core Group Flanders Make @ Ku Leuven Belgium

ISBN: (纸本)9782970161400

The ever-growing complexity of numerical simulations creates the demand for acceleration. Model order reduction (MOR) methods use the algebraic properties of linear systems underlying a simulation to seek for solution to a problem on a smaller subspace. This work explores applicability of the classical reduced basis method to the problem of permeability assessment of a composite fibre tow. The proposed algorithm is based on solving Stokes- Brinkman flow in the fictitious-domain manner, allowing for using any geometry for training. The key to calculation speed-up here is the geometric variability and training on flows through different geometries. It is shown that the model's performance strongly depends on the variability. For one or two deterministic parameters, the new design points can be calculated 10 times faster with 2% relative error. For random fibre distribution, the model is not more effective than regular numerical analysis. However, this framework can be applied to flows where the local shape changes are limited. ©2022 Kandinskii et al.

关键词： Linear systems

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Reconfigurable Smart Grid Management for Electric Vehicle Charging and the Integration of Renewable Energy Sources using Pied Kingfisher Optimizer

Reconfigurable Smart Grid Management for Electric Vehicle Ch...

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Machine Learning and Autonomous Systems (ICMLAS), International Conference on

作者： M. Sivaramkrishnan M. Siva Ramkumar Kaparthi Uday Mohammad Kanan C. Mohan Raj Jayant Giri Dept of EEE Karpagam College of Engnieering India Dept of ECE SNS College of Technology EIE Department CVR College of Engineering Ibrahimpatanam Hyderabad Department of Industrial Engineering College of Engineering University of Business and Technology Jeddah Saudi Arabia Department of Mechanical Engineering College of Engineering Zarqa University Zarqa Jordan Department or EEE Centre for Robotics and Industrial Automation Sri Eshwar College of Engineering Coimbatore Department of Mechanical Engineering Yeshwantrao Chavan College of Engineering Nagpur India Division of Research and Development Lovely Professional University Phagwara

ISBN: (数字)9798331505745

ISBN: (纸本)9798331505752

Electric Vehicle (EV) charging management under the Smart Grid (SG) framework with incorporated Renewable Energy Sources (RESs) functions to advance Energy Management (EM). The operational cost of EV charging varies because renewable energy availability can change so this affects the financial performance of charging operations. Integration of RESs with the SG becomes challenging for operational system efficiency particularly when renewable energy generation levels are low. To overcome these drawbacks, this manuscript proposes an efficient approach for SG management for EV charging with the integration of RESs. The suggested method is Pied Kingfisher Optimizer (PKO). The main aim of the suggested technique is to minimize the operational expenses of EV charging as well as maximize the efficiency of the SG system. The PKO is used to optimize the scheduling and allocation of energy resources within the SG system. By then, the suggested approach is implemented in MATLAB and contrasted with several other methods that are currently in use. The suggested technique outperforms all existing approaches such as Bald Eagle Search (BES), Red Kite Optimization (RKO), Artificial Neural Network-Particle Swarm Optimization (ANN-PSO), and Coati Optimization Algorithm-Constitutive Artificial Neural Network (COA-CANN). The suggested approach delivers superior performance than conventional methods by reducing operational costs to 638,322$ under coordinated charging and 629,745$ under smart charging without impacting system performance metrics.

关键词： Renewable energy sources Costs System performance Artificial neural networks Power system stability Stability analysis Smart grids Wind turbines Resource management Smart charging

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Electric Vehicle Charging Navigation Using Waterwheel Plant Algorithm for Coordinating Smart Grids and Intelligent Transportation Systems

Electric Vehicle Charging Navigation Using Waterwheel Plant ...

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Machine Learning and Autonomous Systems (ICMLAS), International Conference on

作者： M. Siva Ramkumar M. Sivaramkrishnan Kaparthi Uday Mohammad Kanan C. Mohan Raj Jayant Giri Dept of ECE SNS College of Technology Dept of EEE Karpagam College of Engnieering India EIE Department CVR College of Engineering Ibrahimpatanam Hyderabad Department of Industrial Engineering College of Engineering University of Business and Technology Jeddah Saudi Arabia Department of Mechanical Engineering College of Engineering Zarqa University Zarqa Jordan Department or EEE Centre for Robotics and Industrial Automation Sri Eshwar College of Engineering Coimbatore Department of Mechanical Engineering Yeshwantrao Chavan College of Engineering Nagpur India Division of Research and Development Lovely Professional University Phagwara India

ISBN: (数字)9798331505745

ISBN: (纸本)9798331505752

The efficient charging of electric vehicles (EVs) remains essential to create sustainable mobility while EVs transform into crucial elements of upcoming transportation systems. The present EV charging navigation systems deal with three main issues including grid congestion and inadequate charging station (CS) selection and delays from traffic *** paper proposes a novel Waterwheel Plant Algorithm (WWPA) for optimizing EV charging navigation within the Smart Grid (SG) and Intelligent Transportation Systems (ITS). The suggested method strives to enhance SG-EV coordination through demand balancing in addition to charge price reduction and decreased grid congestion levels. WWPA algorithm serves as the proposed method to optimize EV charging schedules. The MATLAB platform serves as the implementation environment for the proposed method which demonstrates superior performance than Multi-agent Reinforcement Learning (MARL), Deep Reinforcement Learning (DRL), Coati-Northern Goshawk Optimization (Coati-NGO) and Grey Sail Fish Optimization (GSFO). Results demonstrate that the WWPA algorithm reduces average charging expenses by 18.14% throughout diverse charging operations as it produces superior performance than existing algorithms operating in the SG ITS.

关键词： Navigation Heuristic algorithms Transportation Transforms Traffic control Electric vehicle charging Smart grids Delays Vehicle dynamics Testing

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Recyclable thin-film soft electronics for smart packaging and e-skins

arXiv

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arXiv 2025年

作者： Carneiro, Manuel Reis de Almeida, Aníbal T. Tavakoli, Mahmoud Majidi, Carmel Soft Machines Lab Department of Mechanical Engineering Carnegie Mellon University PittsburghPA15213 United States Institute of Systems and Robotics Department of Electrical and Computer Engineering University of Coimbra Coimbra3030-290 Portugal

Despite advances in soft, sticker-like electronics, few efforts have dealt with the challenge of electronic waste. Here, we address this by introducing an eco-friendly conductive ink for thin-film circuitry composed of silver flakes (Ag) and a water-based polyurethane (WPU) dispersion. This ink uniquely combines high electrical conductivity (1.6x105 S/m), high resolution digital printability, robust adhesion for microchip integration, mechanical resilience, and recyclability. Recycling is achieved with an ecologically-friendly processing method to decompose the circuits into constituent elements and recover the conductive ink with a decrease of only 2.4% in conductivity. Moreover, adding liquid metal enables stretchability of up to 200% strain, although this introduces the need for more complex recycling steps. Lastly, we demonstrate on-skin electrophysiological monitoring biostickers along with a recyclable smart package with integrated sensors for monitoring safe storage of perishable foods. © 2025, CC BY-NC-ND.

关键词： Electronic Waste

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A 3-D Imaging System for Bubbly Flow Measurement 20

A 3-D Imaging System for Bubbly Flow Measurement

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20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2023

作者： Fu, Yucheng Wang, Dewei Liu, Yang Sun, Xiaodong Worosz, Ted Buchanan, John Nuclear Engineering Program Department of Mechanical Engineering Virginia Tech 635 Price Fork Road BlacksburgVA24061 United States Department of Nuclear Engineering and Radiological Sciences University of Michigan 2355 Bonisteel Blvd Ann ArborMI48109 United States Naval Nuclear Laboratory PO Box 79 West MifflinPA15122 United States

ISBN: (纸本)9780894487934

Image processing algorithms capable of extracting two-phase flow quantities automatically from high-speed images have been under continuous development over the past few decades. In a typical imaging setup, a single high-speed camera is used to capture the two-phase flow information projected to the imaging plane. However, the bubble depth information is not recorded in the images with this configuration, and the bubble volume and surface area need to be estimated with additional shape assumptions. To address such limitations, a stereo imaging system has been developed in this study to acquire 3-D bubbly flow information without the need for bubble depth or shape assumptions. The newly developed system positions three high-speed cameras at different angles, which allows for accurate measurements of the 3-D location of bubbles in a flow field. The previously developed 2-D image processing algorithm is used to obtain three projected silhouettes of individual bubbles from three cameras. The realistic shape of each bubble is then reconstructed from the silhouettes using the 3-D space carving method, which in turn gives accurate measurements of bubble volume and surface area. The time-averaged number density, void fraction, and interfacial area concentration distributions over the cross-sectional plane can be then obtained with a measurement lasting a few tens of seconds by the imaging system. Using this system, three bubbly flow tests have been carried out in a 30 mm × 10 mm rectangular channel with varying superficial liquid and gas velocities. The system could capture both wall-peaked and center-peaked void fraction distributions. The comparison with gas flowmeter measurement shows a reasonable agreement in measuring the area-averaged superficial velocities. This work demonstrates several advantages of the newly developed imaging system such as high temporal and spatial resolutions, great measurement efficiency, and improved accuracy due to its non-intrusive nature. ©

关键词： Two phase flow

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Experiments at the JSI TRIGA Research Reactor for Validation of Nuclear Fuel Depletion Calculations

Experiments at the JSI TRIGA Research Reactor for Validation...

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2024 International Conference on Physics of Reactors, PHYSOR 2024

作者： Anže, Pungerčič Vladimir, Radulović Alireza, Haghighat Luka, Snoj Reactor Physics Department "Jožef Stefan" Institute Jamova cesta 39 Ljubljana1000 Slovenia Faculty of Mathematics and Physics University of Ljubljana Jadranska ul. 19 Ljubljana1000 Slovenia Nuclear Engineering Program Mechanical Engineering Dept. Virginia Tech 900 N. Glebe Road United States

ISBN: (纸本)9780894487972

Importance of experimental methods at research reactors for validation of depletion calculation is discussed. The validation of fuel burnup and nuclide inventory, calculated with stochastic Serpent-2 and hybrid RAPID code system, is performed at JSI TRIGA research reactor. Three different experimental method for indirect burnup determination are presented. The experiments are simulated using Serpent-2 and RAPID depletion codes. First experiment is the fuel rod reactivity worth experiment, in which seven differently burned rods were inserted in the reactor and change in core reactivity was measured. Each insertion was simulated with both codes and great agreement (within 1σ) is observed for both codes. Core's excess reactivity reduction due to burnup was analyzed on three mixed TRIGA cores. Burnup reactivity coefficient was studied with both codes and accurate predictions of reactivity change were obtained. Finally, depleted nuclide inventory is used to simulate dosimetry experiment. Axial profile of 197Au(n, γ)198Au reaction rates was studied using MCNP, where fresh fuel model was compared to the burned fuel model. Fuel burnup was obtained from Serpent-2 and RAPID. The results indicate a 6 % better agreement when Serpent-2 and RAPID's burnup is used. All three experiments indicate a method on how research reactor can be used to in-directly determine and validate nuclear fuel burnup without the use of destructive methods. © 2024 AMERICAN NUCLEAR SOCIETY. All rights reserved.

关键词： Research reactors

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WAG Optimization of Egg Model with Brazilian Pre-Salt Fluid Using PSO Algorithm

WAG Optimization of Egg Model with Brazilian Pre-Salt Fluid ...

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2023 Offshore Technology Conference Brasil, OTCB 2023

作者： Freitas, V.R. Cuéllar Sánchez, William Humberto Lima, G.S. Pastrana, M.A. Barroso, E.P. Muñoz, Daniel M. de Almeida, R.V. Fortaleza, E.L.F. Department of Mechanical Engineering University of Brasília DF Brasilia Brazil Faculty of Gama Electronics Engineering Undergraduate Program University of Brasília DF Brasília Brazil Repsol Sinopec Brasil Pesquisa e Desenvolvimento RJ Rio de Janeiro Brazil

ISBN: (纸本)9781959025023

Water Alternating Gas (WAG) is a consolidated enhanced oil recovery method that outperforms secondary recovery methods such as waterflooding or gas injection. Optimization of the WAG parameters can increase the cost function and improve revenues, but the algorithms usually implemented require high computational resources and time. In this context, a bio-inspired algorithm, Particle Swarm Optimization (PSO) is used to determine the best candidate for only two parameters, water and gas injection time, resulting in the determination of the WAG cycle and WAG ratio, thus drastically reducing the complexity of the problem. The proposed long-term optimization algorithm was applied in a modified version of a well-known reservoir benchmark Egg model, in which the fluid composition was adapted to resemble Brazilian pre-salt reservoir fluids and WAG injection. Moreover, it is shown that the best results obtained consider longer periods of water injection and improve the NPV by 5.5%. © Copyright 2023, Offshore Technology Conference.

关键词： Offshore oil well production

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