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Theoretical connection from the dielectric constant of films to the capacitance of capacitors under high temperature

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High Voltage 2023年第4期8卷 707-716页

作者： Yongxin Zhang Qikun Feng Shaolong Zhong Jiayao Pei Fangyi Chen Lei Huang Zhe Yang Zhimin Dang Department of Electrical Engineering Tsinghua UniversityBeijingChina Department of Electrical and Computer Engineering Carnegie Mellon UniversityPittsburghPennsylvaniaUSA Department of Energy Technology Aalborg UniversityAalborgDenmark

In the process of coping with energy and environmental protection issues,technologies such as energy materials,energy devices,and energy systems have made great *** excellent performance,film capacitors play an increasingly important role in energyrelated *** the increase of application scenarios and the continuous development of film material technology,it is urgent to establish a better theoretical connection from films to ***,the main components of the capacitor including the film and the positional relationships among them are ***,from the two perspectives of indirect calculation according to the volume and the direct calculation according to the winding process,the equation between the dielectric constant of films and the corresponding capacitance of capacitors is ***,the measurement data and error analysis results of the built test platform prove the accuracy and great potential of the proposed calculation *** addition,error sources,including film thickness uniformity,are ***,the challenges faced by the proposed calculation methods and the paths that can be referenced for future research are summarised and discussed.

关键词： film dielectric capacitance

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100 GS/s Equivalent Time Sampling Receiver for UWB Radar Applications 16

100 GS/s Equivalent Time Sampling Receiver for UWB Radar App...

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16th German Microwave Conference, GeMiC 2025

作者： Mutze, Marco Schaffer, Petr Bakkal, Armin Barhold, Michael Possamai De Menezes, Joao Vitor Birkholz, Peter Plettemeier, Dirk TU Dresden Faculty of Electrical and Computer Engineering Germany TU Dresden Speech Technology and Cognitive Systems Faculty of Electrical and Computer Engineering Germany

ISBN: (纸本)9783982039749

This paper presents the design of an ultra-wideband (UWB) sub-nanosecond equivalent time sampling (ETS) receiver. It has been developed as a part of a novel silent speech radar application working at frequencies between 500 MHz and 5 GHz. The system is based on commercial-off-the-shelf (COTS) components such as a programmable delay chip (PDC), track and hold amplifier (THA) and an analog to digital converter (ADC). The receiver system has been fabricated on PCB, optimized and tested. The resulting system accepts a LVPECL sampling clock up to 250 MHz and features an analog input bandwidth of 5 GHz and an equivalent sampling rate of up to 100 GS/s. © 2025 Institut fur Mikrowellen und Antennentechnik - IMA.

关键词： Radar target recognition

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Right-Half-Plane Zeros Free Buck-Boost DC-DC Converter with Wide Voltage Range 12

Right-Half-Plane Zeros Free Buck-Boost DC-DC Converter with ...

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12th Iranian Conference on Renewable Energies and Distributed Generation, ICREDG 2025

作者： Salehi, Seyed Mohsen Hasanzadeh, Saeed Yazdian, Ali Sezavar, Hamid Reza Tarbiat Modares University Faculty of Electrical and Computer Engineering Tehran Iran Qom University of Technology Department of Electrical and Computer Engineering Qom Iran

ISBN: (纸本)9798331525132

This document presents a novel right-half-plane zeros (RHPZ)-free buck-boost DC-DC converter designed for a broad voltage range. It employs diode capacitor (DC) and diode inductor (DL) cells, featuring a positively regulated output voltage. The design of the proposed converter facilitates the achievement of substantial voltage gain. Furthermore, due to its dependence on a continuous input current, it is suitable for applications utilizing renewable energy sources. The fundamental operations of buck and boost modes are thoroughly analyzed, including steady-state analysis, voltage gain, and design methodology. The proposed converter is simulated in PSIM software to confirm the theoretical analyses. The results of the simulation are documented for both buck and boost modes. The input voltage operates within a range of 12V to 36V, and the output voltage is regulated to a stable 24V. The maximum output power of the converter is 100 W. © 2025 IEEE.

关键词： Buck-Boost converter

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A Novel Optimized Li-ion Battery Charging Protocol for EV Onboard Chargers 16

A Novel Optimized Li-ion Battery Charging Protocol for EV On...

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16th Annual Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2025

作者： Gholipour, Mohammad Reza Saradarzadeh, Mehdi Asadi, Ehsan Farhangi, Shahrokh College of Engineering University of Tehran School of Electrical and Computer Engineering Tehran Iran Jundi-Shapur University of Technology Faculty of Electrical and Computer Engineering Dezful Iran

ISBN: (纸本)9798331533946

An optimal charging profile for Li-ion batteries is proposed in this paper. The objective of the charging process is to minimize the charging time of a Li-ion battery while concurrently minimizing its energy losses. To address this challenge, a multi-objective evolutionary optimization algorithm, SPEA2, is employed. For this purpose, the extraction of electrical parameters for the equivalent circuit model of the Li-ion battery is addressed. Thereafter, the polarization voltages of the Li-ion battery are utilized as a key criterion in the SPEA2 optimization algorithm. Additionally, a power loss analysis of the onboard charger converter is conducted, and simulation results are presented to validate the theoretical analysis. The results demonstrate that the proposed charging method has reduced the charging time by 16.17% and the power losses of the charger system by 6.08% compared to the Constant Current-Constant Voltage (CC-CV) charging profile. © 2025 IEEE.

关键词： Charging stations

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Optimization of Energy Hub Performance Using the Improved Particle Swarm Optimization (IPSO) Algorithm for Integrated Energy Systems 12

Optimization of Energy Hub Performance Using the Improved Pa...

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12th Iranian Conference on Renewable Energies and Distributed Generation, ICREDG 2025

作者： Masoudi, Mohammad Reza Haghighi, Mehran Sezavar, Hamid Reza Department of Electrical Engineering Tehran Iran Qom University of Technology Department of Electrical and Computer Engineering Qom Iran

ISBN: (纸本)9798331525132

Energy hubs are essential infrastructures for integrated energy management, optimizing consumption and distribution while enhancing system stability and efficiency. This study presents a deterministic model aimed at minimizing the operating costs of energy grids, where energy hubs coordinate distributed generation and storage systems. To address uncertainties in load, energy prices, renewable energy production, and mobile storage consumption, an adaptive robust optimization approach is employed. The nonlinear and non-convex problem is solved using the Improved Particle Swarm Optimization (IPSO) algorithm, which achieves superior results compared to other methods, with an objective function value of 4253.7, a convergence iteration of 1130, and a computational time of 313.043 seconds. These outcomes underscore the effectiveness of IPSO in optimizing integrated energy systems. © 2025 IEEE.

关键词： Particle swarm optimization (PSO)

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Statistical approaches to assess the performance of domestic air-to-water heat pumps

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International Journal of Ambient Energy 2023年第1期44卷 1316-1328页

作者： Tangwe, Stephen Kusakana, Kanzumba Department of Electrical Electronic and Computer Engineering Central University of Technology Bloemfontein South Africa

Air-to-water heat pump (AWHP) is a renewable and efficient technology used in sanitary water heating. This study focused on the employment of statistical methods to compare the coefficient of performance (COP) and electrical energies consumed using 1.2 kW, 150 L split type AWHP and 0.9 kW, 150 L integrated type AWHP, with 0.5 kW as auxiliary electric heater. The COPs and the electrical energies consumed were determined from the controlled volumes of hot water drawn from each tank at different use periods. The average month-day COPs of the specific volumes of hot water from either system were above two. The p-values from the one-way ANOVA (analysis of variance) and the Kruskal–Wallis tests of the groups’ COPs were smaller than 0.01 and showed significant differences at 99% confidence level. The study can assist energy service companies and researchers, to test for statistical differences in the performance among different AWHPs. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Analysis of variance (ANOVA)

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Evolutionary recurrent neural network based on equilibrium optimization method for cloud-edge resource management in internet of things

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Neural Computing and Applications 2025年第6期37卷 4957-4969页

作者： Ebrahimi Mood, Sepehr Rouhbakhsh, Adel Souri, Alireza Department of Computer Science Yazd University Yazd Iran Department of Computer Engineering Faculty of Engineering Haliç University Istanbul34060 Turkey School of Electrical and Electronic Engineering Shandong University of Technology Zibo255000 China

Cloud computing is an emerging field in information technology, enabling users to access a shared pool of computing resources. Despite its potential, cloud technology presents various challenges, with one of the most significant being resource management within the cloud environment. Specifically, the allocation of physical machines (PMs) to virtual machines (VMs) in the Infrastructure as a service (IaaS) layer aims to achieve optimal efficiency. To address this challenge, we propose an evolutionary recurrent neural network (RNN) for resource allocation, enhanced by the equilibrium optimization (EO) algorithm. This method improves the generalization performance and reduces the architecture complexity of RNNs, while ensuring better adaptability to various demand patterns in cloud environments. Additionally, the effectiveness of RNNs heavily relies on the quality of training data;hence, we generate appropriate training data to facilitate the development of an efficient resource management model. Through extensive simulations, our method demonstrates superior performance compared to traditional algorithms. However, it is worth noting that this study is primarily based on simulation results, highlighting the need for real-world validation to confirm its practical applicability. The proposed method's applicability to different cloud computing environments and scenarios, including various service models (IaaS, PaaS, and SaaS) and deployment models (public, private, and hybrid), is also briefly discussed. Future studies should explore the computational efficiency and potential optimization techniques of the EO-RNN approach and consider real-world implementations to validate its effectiveness and uncover practical challenges. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.

关键词： Cloud platforms

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Feasibility of a novel beamforming algorithm via retrieving spatial harmonics

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Journal of Systems engineering and Electronics 2022年第1期33卷 38-46页

作者： NOROLAHI Jafar AZMI Paeiz NASIRIAN Mahdi Electrical and Computer Engineering Department Tarbiat Modares UniversityTehran 14115Iran Department of Electrical and Computer Engineering Sharif University of TechnologyTehran 11365Iran

This paper introduces an algorithm for beamforming systems by the aid of multidimensional harmonic retrieval(MHR).This algorithm resolves problems,removes limitations of sampling and provides a more robust beamformer.A new sample space is created that can be used for estimating weights of a new beamforming called spatial-harmonics retrieval beamformer(SHRB).Simulation results show that SHRB has a better performance,accuracy,and applicability and more powerful eigenvalues than conventional beamformers.A simple mathematical proof is *** changing the number of harmonics,as a degree of freedom that is missing in conventional beamformers,SHRB can achieve more optimal outputs without increasing the number of spatial or temporal *** will demonstrate that SHRB offers an improvement of 4 dB in signal to noise ratio(SNR) in bit error rate(BER) of 10~(-4) over conventional *** the case of direction of arrival(DOA) estimation,SHRB can estimate the DOA of the desired signal with an SNR of-25 dB,when conventional methods cannot have acceptable response.

关键词： multi-input-multi-output(MIMO) beamforming spatial and temporal signal processing multidimensional harmonic retrieval(MHR) space-time signal processing array signal processing

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Real-Time Electrochemical Model-Based BMS Control for Mitigating Li-Plating and Extending Battery Life

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IEEE Transactions on Transportation Electrification 2025年第3期11卷 7403-7419页

作者： Qasem, Mohammad Haddadin, Mariana Yassin, Yazan Ratrout, Sadam Chen, Chengxiu Stoyanov, Stoyan Al-Hallaj, Said Krishnamurthy, Mahesh Southern Methodist University Department of Electrical and Computer Engineering DallasTX75205 United States Illinois Institute of Technology Department of Electrical and Computer Engineering ChicagoIL60616 United States Beam Global BroadviewIL60155 United States

It is well-known that lithium plating significantly reduces the capacity of Li-ion batteries, particularly at elevated charging rates, high state of charge (SoC), and low temperatures. This study presents a simplified electrochemical battery model incorporating side reactions for real-time (RT) applications. The proposed model is implemented on a battery management system (BMS) using the TI TMS320F28335 DSP, the model’s internal and external states are validated through extensive experimental tests against the high-fidelity P2D model by Gamma technology. The results demonstrated the model’s ability to accurately depict the behavior of a commercially available type 21 700 cylindrical cell while minimizing execution power consumption. The lithium plating/stripping model is examined and compared with the actual voltage plateau characteristics observed in practical testing. Finally, various controllers are designed and implemented into the BMS to optimize the charging current and eliminate plating without significantly increasing charging duration. The battery demonstrated an increase in capacity of 8.3% when using the proposed charging control algorithm compared with the common constant current (CC)–constant voltage (CV) technique, with a charging time increase of less than 30 min, resulting in a 17% improvement in SoH. This demonstrates the effectiveness of enhancing battery performance and longevity with minimal additional charging time. © 2015 IEEE.

关键词： Lithium-ion batteries

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AI-driven material discovery for energy, catalysis and sustainability

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National Science Review 2025年第5期12卷 77-78页

作者： Ning Han Bao-Lian Su Department of Electrical and Computer Engineering University of Toronto Laboratory of Inorganic Materials Chemistry(CMI) University of Namur State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Artificial intelligence (AI) is revolutionizing various sectors, including science,technology, industry and daily life [1,2].One key area where AI can make a significant impact is in material design, crucial for advan...

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