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检索条件"任意字段=21st Conference on System Modeling and Optimization"

共 3609 条记录，以下是31-40 订阅

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Comprehensive optimization Design of Axial-Flux Permanent Magnet Synchronous Machine for Large-Capacity Flywheel Energy storage system 21

Comprehensive Optimization Design of Axial-Flux Permanent Ma...

引用

IEEE 21st Biennial conference on Electromagnetic Field Computation (IEEE CEFC)

作者： Sun, Mingxin Xu, Yanliang Shandong Univ Sch Elect Engn Jinan Peoples R China

ISBN: (纸本)9798350348958;9798350348965

Axial-flux permanent magnet synchronous machine (AFPMSM), with the advantages of high power density and compact structure, are suitable for large-capacity flywheel energy storage system (FESS). FESS is often used to improve efficiency as main development direction, while the traditional AFPMSM has the drawbacks of high loss and large cogging torque, which restricts the application of FESS. Therefore, the AFPMSM using soft magnetic composites (SMC) is proposed in this paper, then the parameters of machine are investigated, and finally a new optimization strategy combining back-propagation artificial neural network (BP-ANN) based on genetic algorithm (GA) and multi-objective particle swarm optimization (PSO) search algorithm is used for optimization design.

关键词： Flywheel energy storage system (FESS) permanent magnet synchronous machine (PMSM) axial-flux permanent magnet synchronous machine (AFPMSM) multi-objective optimization soft magnetic composite (SMC)

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Hierarchical Comprehensive Compensation strategy for Multi-Voltage Level Traction Power Supply system 21

Hierarchical Comprehensive Compensation Strategy for Multi-V...

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21st International conference on Harmonics and Quality of Power

作者： Feng, Jinwei Chen, Minwu Sun, Zhongrui Southwest Jiaotong Univ Sch Elect Engn Chengdu Peoples R China

ISBN: (纸本)9798350382570;9798350382563

Power quality (PQ) problem and insufficient supply capacity have been challenges for long-distance traction power supply system (LD-TPSS). LD-TPSS based on high-voltage traction cables can enhance the power supply capacity. However, it triggers the end supply voltage overrun easily. In this paper, a new multi-voltage (MV-) TPSS is proposed, it can ensure the power supply capacity, regulate the voltage and realize the PQ management. Then, a comprehensive compensation strategy with a hierarchical structure is proposed. In the upper layer, voltage and PQ are managed in two stages to calculate the compensation power demand. The first stage, system voltage reactive power flow optimization is optimized. The second stage, unified management of PQ such as VU and power factor (PF) is completed. The control of each compensation device is realized by the lower controller. Finally, a detailed case comparison demonstrates the correctness and effectiveness of the system topology and strategy.

关键词： Power quality Power supply capacity traction power supply system voltage unbalance voltage regulation

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Using Prior Knowledge to Improve Adaptive Real Time Exploration and optimization 21

Using Prior Knowledge to Improve Adaptive Real Time Explorat...

引用

IEEE 21st International conference on Industrial Informatics (INDIN)

作者： Tubbs, William J. Mercangoz, Mehmet B Tubbs & Associates Consulting Inc Vancouver BC Canada Imperial Coll London Dept Chem Engn London England

ISBN: (纸本)9781665493130

Real-time optimization strategies aim to improve the operating performance of a process using a model of its input-output behaviour. This is challenging when the true system characteristics are not fully known and there are safe operating limits that must be respected. In this work, we evaluate the performance of an adaptive, real-time, exploration and optimization algorithm on a simulated refrigeration plant, and show how incorporating prior knowledge based on engineering principles can improve its performance, especially during the early stages of learning when there are few observed data. The results indicate that exceedances of the safe operating limit are avoided and the improved models still learn the true system characteristic, albeit more slowly than the standard models fitted without prior knowledge.

关键词： process control real-time optimization Gaussian processes

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21st International Learning and Technology conference: Reality and Science Fiction in Education, L and T 2024

21st International Learning and Technology Conference: Reali...

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21st International Learning and Technology conference, L and T 2024

ISBN: (纸本)9798350393569

The proceedings contain 60 papers. The topics discussed include: battery management system for enhancing the performance and safety of lithium-ion batteries;optimal placement and sizing of distributed generation for power factor improvement;sleep disorder analysis: unveiling the interplay between lifestyle health and sleep quality;turbulent Reynolds stresses prediction using stochastic gradient boosting regression;load flow analysis and optimization for solar PV integration in power systems;load flow analysis and optimization for smart grid integration in power systems;a novel method to predict chronic kidney disease using optimized deep learning algorithm;accurate classification of cervical cancer based on multi-layer perceptron hunger games search optimization technique;and design of receiver RF front end for mm-wave 5G applications.

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Design, optimization and Performance analysis of Two In-Wheel Motors Drive Electric Vehicles 21

Design, Optimization and Performance analysis of Two In-Whee...

引用

21st International Multi-conference on systems, Signals and Devices, SSD 2024

作者： Zaaraoui, Lassaad Abdelly, Wafa Mansouri, Ali University of Gafsa Faculty of Sciences of Gafsa Laboratory of Technology Energy and Innovative Materials Gafsa Tunisia University of Gabes National Engineering School of Gabes Gabes Tunisia University of Gafsa Higher Institute of Applied Sciences and Technology of Gafsa Laboratory of Technology Energy and Innovative Materials Gafsa Tunisia

ISBN: (纸本)9798350374131

In nearly decades, direct drive permanent magnet synchronous machines have garnered substantial interest within the realm of electric vehicles (EV s). This work deals with the design optimization and performance comparison of two in-wheel motors (IWMs). The motors topologies considered in this study are as follows: radial flux surface mounted permanent magnets with stator teeth of equal and unequal sizes. The design of these two configurations is carried out by giving the magnetic and electric modeling. The optimization process is conducted with respect to three objective functions: maximizing efficiency, minimizing weight, and minimizing torque ripple. The optimization results demonstrated that the configuration with unequal stator teeth outperforms the other configuration in terms of efficiency and torque ripple. The optimization results are further investigated using the finite element method (FEM). The analysis results showed that the configuration with unequal stator teeth exhibits lower levels of magnetic saturation, losses and torque ripple compared to the machine with equal stator teeth. © 2024 IEEE.

关键词： Permanent magnets

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Surrogate-Based optimization of SMT Inductors 21

Surrogate-Based Optimization of SMT Inductors

引用

IEEE 21st Biennial conference on Electromagnetic Field Computation (IEEE CEFC)

作者： Riener, Christian Reinbacher-Koestinger, Alice Bauernfeind, Thomas Kvasnicka, Samuel Roppert, Klaus Kaltenbacher, Manfred Silicon Austria Labs TU Graz SAL GEMC Lab Graz Austria Graz Univ Technol Inst Fundamentals & Theory Elect Engn Graz Austria

ISBN: (纸本)9798350348958;9798350348965

Parasitic electromagnetic (EM) effects within passive components are a critical problem in EMI filter applications, especially when specific filter specifications must be met. In this study, a surrogate model-based optimization methodology is proposed to determine the optimal internal geometry of a surface-mounted (SMT) ferrite bead to maximize the inductance of the device over a wide frequency range from 1 MHz to 1 GHz. Preliminary results show an improvement of the device behavior compared to the original design provided by the manufacturer over the entire frequency range of interest.

关键词： EM-based design Kriging interpolation SMT ferrite beads Surrogate modeling

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Decision system in a Building to Coordinate the Energy Forecasting Tasks 21st

Decision System in a Building to Coordinate the Energy Forec...

引用

21st International Symposium on Distributed Computing and Artificial Intelligence

作者： Ramos, Daniel Faria, Pedro Vale, Zita Polytech Porto LASI Intelligent Syst Associate Lab GECAD Res Grp Intelligent Engn & Comp Adv Innovat Porto Portugal

ISBN: (纸本)9783031820724;9783031820731

Nowadays, energy buildings have a huge impact in society regarding the active role in the management of energy consumption. Hence, building owners are required to avoid energy losses and improve energy efficiency as high as possible. Therefore, it is required to plan an optimization strategy to buy and sell energy in the market ahead of time. To formulate this optimization plan, building owners require the work of specialists responsible for processing, training, forecasting, and evaluation tasks regarding the prediction of energy consumption data from a building for a specific target of time. Therefore, a multiagent-system is needed to allow the cooperation of various agents including the building owner, forecast provider, data structurer and error analysis. Moreover, forecasting algorithms such as artificial neural networks should be taken into consideration in order to process large quantities of energy consumption data during the training and forecasting phases.

关键词： agents artificial neural networks building owner energy building

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Solution stability Judgment Mechanism Based on a Dynamic Grid system for Multi-Objective optimization Algorithms 21

Solution Stability Judgment Mechanism Based on a Dynamic Gri...

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21st International conference on Networking, Sensing and Control, ICNSC 2024

作者： Li, Mingran Huang, Li Chen, Mingyang School of Electronic and Electrical Engineering Shanghai University of Engineering Science Shanghai China

ISBN: (纸本)9798350365221

In decomposition-based evolutionary multi-objective optimization algorithms (MOEA/Ds) with adaptive strategies for weight vectors, the vectors are updated periodically. Their updates' timing and frequency significantly influence optimization outcomes. Better results are promising to be obtained when weight vectors are updated at the time that the population reaches stability. Therefore, this work proposes a solution stability judgment mechanism based on a dynamic grid system to analyze whether the solutions in objective space have reached a state of stable convergence. To verify the effectiveness of our proposed mechanism, we add it to three MOEA/Ds with adaptive weight vector strategies and conduct experiments on 11 benchmarks compared with these algorithms' original forms. The results demonstrate that the proposed mechanism can significantly enhance the optimization performance of these algorithms. It can find better weight update times, which helps to result in better solutions in limited iterations with a faster speed. © 2024 IEEE.

关键词： optimization algorithms

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Reliability Analysis of Modular Multilevel Co-Phase Traction Power Supply system with PV and HESS 21

Reliability Analysis of Modular Multilevel Co-Phase Traction...

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21st International conference on Harmonics and Quality of Power

作者： Xu, Mei Chen, Minwu Feng, Jinwei Southwest Jiaotong Univ Sch Elect Engn Chengdu Peoples R China

ISBN: (纸本)9798350382570;9798350382563

The reliable operation of the Modular Multilevel Co-Phase Power Supply Device (MM-CPD), as a key component of the Co-Phase Traction Power Supply system (CTPSS), is of paramount importance. However, the access of photovoltaic (PV) and hybrid energy storage systems (HESS) can change the port current of the MM-CPD and affect its reliability. Therefore, firstly, a day-ahead optimization model of the CTPSS is developed to minimize the traction substation's daily operating cost, and the compensation current of each phase of the MM-CPD is determined. Secondly, the reliability calculation model for MM-CPD is established according to the physical failure mechanism and reliability prediction manual. Finally, the impact of PV and HESS access on the reliability of the MM-CPD is analyzed with actual traction load data as an example, and its best redundancy configurations are determined to maximize the reliability of the device.

关键词： Modular multilevel co-phase power supply device reliability calculation redundancy configuration photovoltaic and hybrid energy storage system

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Research on The modeling of The Dispatching system of Forging Workshop and The Scheduling Method of Thermal Connection 21

Research on The Modeling of The Dispatching System of Forgin...

引用

21st IEEE International conference on Mechatronics and Automation (IEEE ICMA)

作者： Zhang, Zhikai Zhang, Niansong Wang, Aimin He, Hailong Nanjing Univ Sci & Technol Dept Mech Engn Nanjing Jiangsu Peoples R China Beijing Inst Technol Dept Mech Engn Beijing Peoples R China Beijing Innowind Aerosp Equipment Co Ltd Beijing Peoples R China

ISBN: (纸本)9798350388084;9798350388077

In this paper, the thermal connection problem in the production scheduling of forging workshop is studied, and an optimization algorithm is proposed. First of all, we established a mathematical model of the production scheduling of the forging workshop, taking into account the thermal connection between the processes, as well as practical factors such as resource constraints. Then, combined with the genetic algorithm and the tabu search algorithm, an optimization algorithm that meets the needs was designed, and the optimization method achieved the goal of improving equipment efficiency and reducing energy consumption through case verification. This study has certain theoretical guiding significance and practical application significance for optimizing the production scheduling and improving the production efficiency of the forging workshop.

关键词： forging workshop hot connection genetic algorithm tabu search algorithm

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