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

作者： Jafari, Hossein Hamzeh, Mohsen Vaez-Zadeh, Sadegh Babaei, Ebrahim University of Tehran School of Electrical and Computer Engineering College of Engineering Tehran Iran University of Tabriz Electrical and Computer Engineering Department Tabriz Iran

ISBN: (纸本)9798331533946

Dynamic wireless power transfer (DWPT) systems provide a promising solution to overcome the limitations of electric vehicles (EVs) regarding battery size, range constraints, and lengthy charging times. This study focuses on enhancing the efficiency (η) and power factor (PF) product (η·PF), a critical metric for optimizing power transfer capacity and reducing both operational and capital costs. An optimal frequency-tracking method is utilized to maximize η·PF, even under abrupt changes in coupling coefficient due to EV misalignment with the charging track. The output voltage is regulated by adjusting the shoot-through duty cycle of the primary inverter, utilizing the Z-source inverter (ZSI), which not only performs voltage regulation but also enhances the converter's reliability. The proposed method also addresses load variations, ensuring stable output voltage while maintaining the system's operation at an optimal η·PF. Comprehensive simulations demonstrate the effectiveness of the approach, showeasing significant improvements in PF, η·PF, and output voltage stability. The findings highlight the potential of this dynamic control strategy to enhance system reliability and performance in real-world EV charging scenarios, making it a highly efficient and cost-effective solution for next generation WPT infrastructure. © 2025 IEEE.

关键词： Inductive power transmission

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A Color Image Encryption Scheme Based on Singular Values and Chaos

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computer Modeling in engineering & Sciences 2023年第10期137卷 965-999页

作者： Adnan Malik Muhammad Ali Faisal S.Alsubaei Nisar Ahmed Harish Kumar Electrical Engineering Department University of Engineering and TechnologyLahore54000Pakistan Department of Cybersecurity College of Computer Science and EngineeringUniversity of JeddahJeddah21959Saudi Arabia Computer Engineering Department University of Engineering and TechnologyLahore54000Pakistan Department of Computer Science College of Computer ScienceKing Khalid UniversityAbha61421Saudi Arabia

The security of digital images transmitted via the Internet or other public media is of the utmost *** encryption is a method of keeping an image secure while it travels across a non-secure communication medium where it could be intercepted by unauthorized *** study provides an approach to color image encryption that could find practical use in various *** proposed method,which combines four chaotic systems,employs singular value decomposition and a chaotic sequence,making it both secure and *** unified average change intensity,the number of pixels’change rate,information entropy analysis,correlation coefficient analysis,compression friendliness,and security against brute force,statistical analysis and differential attacks are all used to evaluate the algorithm’s *** a thorough investigation of the experimental data,it is concluded that the proposed image encryption approach is secure against a wide range of attacks and provides superior compression friendliness when compared to chaos-based alternatives.

关键词： Encryption image encryption chaos theory color image encryption singular value decomposition compression friendliness

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Multiclass Classification for Cyber Threats Detection on Twitter

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computers, Materials & Continua 2023年第12期77卷 3853-3866页

作者： Adnan Hussein Abdulwahab Ali Almazroi College of Computer Science and Engineering Department of Computer ScienceAL-Ahgaff UniversityMukallaYemen College of Computing and Information Technology at Khulais Department of Information TechnologyUniversity of JeddahJeddahSaudi Arabia

The advances in technology increase the number of internet systems *** a result,cybersecurity issues have become more *** threats are one of the main problems in the area of ***,detecting cybersecurity threats is not a trivial task and thus is the center of focus for many researchers due to its *** study aims to analyze Twitter data to detect cyber threats using a multiclass classification *** data is passed through different tasks to prepare it for the *** Frequency and Inverse Document Frequency(TFIDF)features are extracted to vectorize the cleaned data and several machine learning algorithms are used to classify the Twitter posts into multiple classes of cyber *** results are evaluated using different metrics including precision,recall,F-score,and *** work contributes to the cyber security research *** experiments revealed the promised results of the analysis using the Random Forest(RF)algorithm with(F-score=81%).This result outperformed the existing studies in the field of cyber threat detection and showed the importance of detecting cyber threats in social media *** is a need for more investigation in the field of multiclass classification to achieve more accurate *** the future,this study suggests applying different data representations for the feature extraction other than TF-IDF such as Word2Vec,and adding a new phase for feature selection to select the optimum features subset to achieve higher accuracy of the detection process.

关键词： Cybersecurity cyber threat detection artificial intelligence machine learning Twitter

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NeurDB: an AI-powered autonomous data system

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Science China(Information Sciences) 2024年第10期67卷 129-150页

作者： Beng Chin OOI Shaofeng CAI Gang CHEN Yanyan SHEN Kian-Lee TAN Yuncheng WU Xiaokui XIAO Naili XING Cong YUE Lingze ZENG Meihui ZHANG Zhanhao ZHAO School of Computing National University of Singapore College of Computer Science and Technology Zhejiang University Department of Computer Science and Engineering Shanghai Jiao Tong University School of Information Renmin University of China School of Computer Science and Technology Beijing Institute of Technology

In the wake of rapid advancements in artificial intelligence(AI), we stand on the brink of a transformative leap in data systems. The imminent fusion of AI and DB(AI×DB) promises a new generation of data systems, which will relieve the burden on end-users across all industry sectors by featuring AI-enhanced functionalities, such as personalized and automated in-database AI-powered analytics, and selfdriving capabilities for improved system performance. In this paper, we explore the evolution of data systems with a focus on deepening the fusion of AI and DB. We present NeurDB, an AI-powered autonomous data system designed to fully embrace AI design in each major system component and provide in-database AI-powered analytics. We outline the conceptual and architectural overview of NeurDB, discuss its design choices and key components, and report its current development and future plan.

关键词： AI$\times$DB in-database AI intelligent data system

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Beamforming and Reflection Design for Short Packet ISAC With Non-Ideal RIS: An A3C-Based Approach

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IEEE Transactions on Vehicular Technology 2025年第5期74卷 8379-8384页

作者： Mahmoudi, Behrad Khonsari, Ahmad Zeinali, Farshad Mili, Mohammad Robat Mashhadi, Mahdi Boloursaz Xiao, Pei University of Tehran Department of Electrical and Computer Engineering Tehran Iran University of Tehran School of Electrical and Computer Engineering College of Engineering Tehran Iran School of Computer Science in the Institute for Research in Fundamental Sciences Tehran Iran United Kingdom Institute for Advanced Innovative Solutions Tehran Iran

Integrated sensing and communication (ISAC) is a promising solution to mitigate the increasing congestion of the wireless spectrum. In this paper, we investigate the short packet communication regime within an ISAC system assisted by a reconfigurable intelligent surface (RIS) to meet the low latency ultra-reliable requirements in the next-generation wireless networks. We consider a non-ideal RIS model that captures effects of the phase-dependent amplitude variations in the reflection coefficients, and we have incorporated the near-field model into the channels between the RIS and the users or targets. In this setup, we jointly design the transmit beamforming and the RIS phase shifts to maximize the sum rate while satisfying the sensing signal-to-noise ratio (SNR) requirement. The system simultaneously carries out multitarget sensing and multi-user short packet communications with the help of the RIS. Considering the non-convex and dynamic nature of the resulting optimization problem, we propose an asynchronous advantage actor-critic (A3C) based method for beamforming and reflection design in this setup. Numerical results demonstrate the superiority of the proposed scheme over the benchmarks. © 1967-2012 IEEE.

关键词： Beamforming

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Hybrid pruning for nonlinear equalization in short-reach high-speed optical links

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Optics Express 2025年第6期33卷 13087-13100页

作者： Widhianto, Benedictus Yohanes Bagus Chen, Jyehong Taiwan Department of Photonics College of Electrical and Computer Engineering National Yang-Ming Chiao Tung University Hsinchu300 Taiwan

Nonlinear impairments from transceiver components in short-reach optical communication systems, such as drivers, TIAs, and external modulators, pose significant challenges for achieving high data rates with low latency. Volterra Nonlinear Equalization (VNLE) can mitigate these impairments but suffers from higher computational complexity, rendering it impractical for energy-efficient and low-cost data center applications. We propose a Hybrid Pruned VNLE (HP-VNLE) that combines structured and unstructured kernel reduction to significantly reduce complexity while maintaining low bit error rate (BER) performance. This study reveals that most non-significant taps in the third-order unpruned VNLE consist of at least three different index terms, justifying the necessity of pruning to remove taps with minimal contribution to nonlinearity mitigation. Experimental results demonstrate that the HP-VNLE’s performance highly depends on the initial tap configuration derived from the proposed structured kernel reduction so-called center-spread (CS)VNLE. Moreover, combining the third-order HP-VNLE with a linear equalizer and a 1-tap decision feedback equalizer (DFE) yields superior BER results compared to unpruned VNLE. This hybrid approach reduces the computational complexity and enhances system performance, offering a range of promising solutions for future optical communication systems where energy efficiency, low complexity, and high data rates must be optimized for various application scenarios. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Optical links

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Grid-Forming PV System for Frequency Ancillary Services Provision 3

Grid-Forming PV System for Frequency Ancillary Services Prov...

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3rd International Conference on Energy Transition in the Mediterranean Area, SyNERGY MED 2024

作者： Barac, Bojana Capuder, Tomislav Panteli, Mathaios University of Zagreb Faculty of Electrical Engineering and Computing Department of Energy and Power Systems Croatia University of Cyprus Department of Electrical and Computer Engineering Cyprus

ISBN: (纸本)9798350375923

With the increasing penetration of photovoltaic (PV) systems posing challenges to power system stability, this paper investigates the effectiveness of grid-forming controlled PV systems in providing frequency ancillary services. The study implements the Virtual Synchronous Machine strategy, utilizing DC-link capacitor energy for inertial response provision (DCVQVSM), integrated within a grid-forming topology. To ensure power-frequency droop control, an additional control loop is introduced within the DCVQ-VSM topology. The efficacy of this control system is proved through simulations conducted on a simple two-bus system and a fully-electrified active distribution network (ADN). Both case studies demonstrate the successful operation of grid-forming controlled PV systems, highlighting their capability to influence power system frequency dynamics. The analysis underscores the significance of deloading PV operation in facilitating flexibility services provision, thereby enhancing the reliability and resilience of system operation. © 2024 IEEE.

关键词： Synchronous machinery

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Stability Investigation and Improvement for DC Cascade Systems with Simplified Impedance-based Stability Criterion

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1044-1052页

作者： Junbin Fang Zhikang Shuai Yang Li Zhibing Wang Xiangyang Wu Xia Shen Z.John Shen College of Electrical and Information Engineering Hunan UniversityChangsha 410082China Renewable Energy Department of China Electric Power Research Institute Beijing 100192China Department of Electrical and Computer Engineering Illinois Institute of TechnologyChicagoIL 60616USA IEEE

In DC distributed power systems(DPSs),the complex impedance interactions possibly lead to DC bus voltage oscillation or *** previous research,the stability analysis of DPSs is implemented based on mathematical analysis in control *** specific mechanisms of the instability of the cascade system have not been intuitively *** this paper,the stability analysis of DPSs based on the traditional Nyquist criterion is simplified to the resonance analysis of the seriesconnected port impedance(Z=R+jX)of source and load *** reveals that the essential reason for impedance instability of a DC cascade system is that the negative damping characteristic(R<0)of the port the overall impedance amplifies the internal resonance source at reactance zero-crossing *** simplified stability criterion for DC cascade systems can be concluded as:in the negative damping frequency ranges(R<0),there exists no zero-crossing point of the reactance component(i.e.,X=0).According to the proposed stability criterion,the oscillation modes of cascade systems are classified.A typical one is the internal impedance instability excited by the negative damping,and the other one is that the external disturbance amplified by negativity in a low stability ***,the impedance reshaping method for stability improvement of the system can be further *** validity of the simplified criterion is verified theoretically and experimentally by a positive damping reshaping method.

关键词： DC cascaded system,impedance model impedance reconstruction stability criterion

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Accurate threat hunting in industrial internet of things edge devices

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Digital Communications and Networks 2023年第5期9卷 1123-1130页

作者： Abbas Yazdinejad Behrouz Zolfaghari Ali Dehghantanha Hadis Karimipour Gautam Srivastava Reza M.Parizi Cyber Science Lab School of Computer ScienceUniversity of GuelphOntarioCanada Department of Electrical and Software Engineering University of CalgaryAlbertaCanada Department of Mathematics and Computer Science Brandon UniversityBrandonCanada College of Computing and Software Engineering Kennesaw State UniversityGAUSA Research Center for Interneural Computing China Medical UniversityTaichungTaiwanChina Department of Computer Science and Mathematics Lebanese American UniversityBeirut1102Lebanon

Industrial Internet of Things(IIoT)systems depend on a growing number of edge devices such as sensors,controllers,and robots for data collection,transmission,storage,and *** kind of malicious or abnormal function by each of these devices can jeopardize the security of the entire ***,they can allow malicious software installed on end nodes to penetrate the *** paper presents a parallel ensemble model for threat hunting based on anomalies in the behavior of IIoT edge *** proposed model is flexible enough to use several state-of-the-art classifiers as the basic learner and efficiently classifies multi-class anomalies using the Multi-class AdaBoost and majority *** evaluations using a dataset consisting of multi-source normal records and multi-class anomalies demonstrate that our model outperforms existing approaches in terms of accuracy,F1 score,recall,and precision.

关键词： IIoT Threat hunting Edge devices Multi-class anomalies Ensemble methods

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Techno-economic assessment of green hydrogen production in unexploited landlocked northern-western region of Oman to realize national sustainable strategy

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International Journal of Hydrogen Energy 2024年 137卷 892-904页

作者： Sial, Noman Raza Al-Abri, Hilal Qyyum, Muhammad Abdul Al-Abri, Rashid Al-Muhtaseb, Ala'a H. Sultan Qaboos University Muscat Oman Department of Petroleum and Chemical Engineering College of Engineering Sultan Qaboos University Muscat Oman Department of Electrical and Computer Engineering College of Engineering Sultan Qaboos University Muscat Oman

The sustainable and economical production of hydrogen is pivotal to the energy transition. This study assesses the techno-economic feasibility of green hydrogen in the unexploited northwest landlocked regions of Oman, capitalizing on unused renewable resources to facilitate a sustainable energy transition. In this study, a renewable energy system and green hydrogen production facility are sized to meet a fixed demand of hydrogen (100 metric tons per day) across five potential areas. Technical and economic metrics are then evaluated for various renewable energy combinations. The results reveal the lowest levelized cost of hydrogen in a standalone solar energy scenario, ranging from $8.34 to $16.73 per kilogram of hydrogen. Additionally, the levelized cost is projected and benchmarked against internationally reported values by IEA and IRENA, offering insights into the system's economics and guiding advancements in technology and policy. Further, the produced green hydrogen is anticipated to play a pivotal role in decarbonizing the nearby petroleum fields, small and medium enterprises, and domestic infrastructure. Consequently, this research aligns with Oman Vision 2040 and contributes to Oman's National Net-Zero Strategy 2050, as well as United Nations Sustainable Development Goal 7 (affordable and clean energy) and 12 (responsible consumption and production). © 2024 Hydrogen Energy Publications LLC

关键词： Solar energy

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