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arXiv 2025年

作者： Ma, Xiangjun Nasir, Ali Arshad da Costa, Daniel Benevides Interdisciplinary Research Center for Communication Systems and Sensing Department of Electrical Engineering King Fahd University of Petroleum & Minerals Dhahran31261 Saudi Arabia

This paper investigates the downlink (DL) physical layer security (PLS) in a near-field (NF) extra-large multiple-input multiple-output MIMO (XL-MIMO) system. To enhance the secrecy rate (SR), null-space artificial noise (AN) is transmitted alongside the confidential message, ensuring orthogonality with legitimate user equipment (LUE) channels. The objective is to maximize the minimum SR by optimizing the NF beamfocusing matrix and power allocation between the signal and AN, considering various channel state information (CSI) conditions and transmit power constraints. The proposed approach uses successive convex approximation (SCA) for beamfocusing optimization and golden section search (GSS) for power allocation. The following open questions are addressed: (i) Can AN transmission further enhance SR for multiple LUEs in the presence of multiple eavesdropping user equipment (EUEs)? (ii) Can null-space AN transmission achieve attractive SR performance even without CSI availability for EUEs? Both questions are affirmatively answered and explored in detail, with an algorithm presented for joint beamfocusing design and AN-aided power allocation. The proposed method outperforms state-of-the-art approaches that either omit AN transmission or rely on maximal-ratio transmission (MRT) for beamfocusing. © 2025, CC BY.

关键词： Convex optimization

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A Single DC Link Four Level Multilevel Inverter with Increased DC Bus Utilization for Drives

A Single DC Link Four Level Multilevel Inverter with Increas...

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Annual Conference of Industrial Electronics Society

作者： Rohith Pottekkat Vivek R S K. Gopakumar L. Umanand B. Subba Reddy Leopoldo G. Franquelo Interdisciplinary Centre for Energy Research Indian Institute of Science Bangalore India Department of Electrical Engineering College of Engineering Trivandrum Thiruvananathapuram India Department of Electronic Systems Engineering Indian Institute of Science Bangalore India Department of Electrical Engineering Indian Institute of Science Bangalore India Department of Electronics Engineering University of Seville Seville Spain

ISBN: (数字)9781665464543

ISBN: (纸本)9781665464550

The paper proposes a low switch count multilevel inverter topology having a four-level space vector structure. The proposed MLI demonstrates a reduced number of active switches in relation to the number of output voltage levels. This inverter has an increased DC bus utilization, reaching up to 0.637 times the DC link voltage compared to the conventional multilevel inverters limited to 0.577 times the DC link *** proposed multilevel inverter configuration integrates a two-level inverter with a cascaded H-bridge (CHB) converter in each phase. The each CHB capacitor voltage are regulated to one third of dc link voltage. The enhanced utilization of the DC bus voltage is due to the space vector redundancies provided by the CHB units. Both simulation and experimental validation of the proposed scheme are conducted on an induction motor drive across for various operating conditions. Field-oriented control (FOC) is employed to control the speed of the induction machine, while examining capacitor balancing under various transient conditions.

关键词： Induction motor drives Phase modulation Capacitors Termination of employment Switches Multilevel inverters Vectors Topology Voltage control Transient analysis

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Virtual Wearable Sensor Data Generation with Generative Adversarial Networks

Virtual Wearable Sensor Data Generation with Generative Adve...

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2023 Winter Simulation Conference, WSC 2023

作者： Huang, Yining Wan, Hong Chen, Xi North Carolina State University Operations Research Graduate Program 915 Partners Way RaleighNC27606 United States North Carolina State University Department of Industrial and Systems Engineering 915 Partners Way RaleighNC27606 United States Virginia Tech Grado Department of Industrial and Systems Engineering 1145 Perry Street BlacksburgVA24061 United States

ISBN: (纸本)9798350369663

This study delves into the utilization of Generative Adversarial Networks (GANs) for generating subject-specific time series sensor data, offeringaninnovativealternativetotraditionalmetamodel-basedsimulations. We undertake an in-depth analysis of DoppelGANger, a prominent GAN variant for time series data and metadata generation, evaluating its efficiency and efficacy. The sensor data for this investigation was sourced from the National Health and Nutrition Examination Survey, which served as the foundational training set. We scrutinized the synthesized sensor data corresponding to various physical attributes, focusing on the temporal and multi-dimensional statistical properties. Our empirical findings underscore the potential of GANs to adeptly capture the time-dependent correlations and the intricate statistical characteristics inherent in multi-dimensional data. This insight into GANs' capabilities is a crucial step towards more sophisticated synthetic data generation, with significant implications for future applications in wearable technology and personalized health monitoring systems. © 2023 IEEE.

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A Review of the Challenges and Opportunities for Smart Mobility and Logistics Solutions

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Transportation Research Procedia 2025年 84卷 602-609页

作者： Karim Sattar Sami Elferik Haitham Saleh Yasser Almoghathawi Mohammed Sayad Interdisciplinary Research Center for Smart Mobility and Logistic King Fahd University of Petroleum and Mineral Dhahran Saudi Arabia Control and Instrumentation Systems Engineering Department King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia Industrial Systems Engineering King Fahd University of Petroleum and Mineral Dhahran Saudi Arabia

Smart mobility and logistics (SML) is an emerging paradigm that aims to interconnect transportation networks, industries, and commercial services to provide better services to end-users. SML solutions are rapidly growing in popularity not only in industrial sectors but also at individual levels by means of ride-sharing solutions, micro-mobility solutions, electric vehicles, and intelligent autonomous systems like self-driving cars, trucks, drones, and legged robots, among others. Usually, these solutions utilize communications technologies such as 5G internet services, cloud services, the internet of things, intelligent solutions, sophisticated routing and scheduling algorithms, and security features. The SML sector is still in its early stages, and solutions need to be designed for challenges that are unique due to the diverse needs. Also, many places in the world are facing challenges such as disruption in the global and local supply chains, traffic congestion, the death toll due to poor traffic networks, low-performance routes, and degraded quality of service. This paper aims to help researchers address these challenges and find innovative solutions that can help achieve SML goals.

关键词： smart mobility logistics challenges economy transportation privacy security regulations

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Efficient Energy Storage Aided Load Frequency Stabilization of Microgrid

Efficient Energy Storage Aided Load Frequency Stabilization ...

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IEEE Kansas Power and Energy Conference

作者： Abdul Latif S.M. Suhail Hussain Department of Electrical Engineering University of Nantes Nantes France Electrical Engineering Department Interdisciplinary Research Center for Sustainable Energy and Systems King Fahd University of Petroleum and Minerals (KFUPM) Dhahran Saudi Arabia

ISBN: (数字)9798350372403

ISBN: (纸本)9798350372410

Due to current environmental concerns, renewable resources (RRs) have gained popularity as microgrid power generating infrastructure. However, unpredictable weather and loading circumstances have a negative impact on generated power, which in turn affects the microgrid frequency. The current study proposes a control approach for reducing frequency excursions in an islanded microgrid (IMG) by designing a cascading controller where primary controller used is a proportional resonant (PR) controller, and the secondary controller is fractional order PR, thereby forming a cascaded control of CFO (PR) 2 that has been optimized using moth flame technique (MFT). An IMG consists of precise wind turbine (PWT), cohesive solar micro turbine (CSμT), including aggregated energy storage (ES). The practicality of the proposed controller (i.e. CFO(PR) 2 ) is unearthed by comparing the dynamic characteristics of IMG system with other controllers like FOPR and PID controllers. Finally, the model is tested under different case studies, with variations in generation and load.

关键词： Renewable energy sources Fluctuations System dynamics Resonant frequency Microgrids Control systems Wind turbines

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L2 Input-to-State Stability and Stabilization of Coupled Linear ODE-Hyperbolic PDE systems*

L2 Input-to-State Stability and Stabilization of Coupled Lin...

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IEEE Conference on Decision and Control

作者： Daniel Coutinho Gustavo Artur de Andrade Franthiescolly Vieira de Carvalho Department of Automation and Systems Engineering Federal University of Santa Catarina Florianópolis Brazil Post-graduate Program in Automation and Systems Engineering Federal University of Santa Catarina Florianópolis Brazil

ISBN: (数字)9798350316339

ISBN: (纸本)9798350316346

This paper addresses the problem of input-to-state stability (ISS) and stabilization of linear ordinary differential equations (ODEs) coupled with a system of homogeneous linear hyperbolic partial differential equations (PDEs) through the boundaries. First, a Lyapunov result characterizing the ISS property for finite-dimensional systems is extended to deal with coupled ODE and PDE systems. The proposed ISS condition is then applied to derive stability and stabilization conditions in terms of linear matrix inequality constraints assuming magnitude bounded disturbances at the boundaries. Two convex optimization problems are also proposed in order to obtain either an optimized reachable set estimate or a boundary controller that minimizes the disturbance effects on the ${\mathcal{L}}_{2} \times \mathbb{R}$-norm of the system states. Numerical examples illustrate the potential of the proposed approach.

关键词： Partial differential equations Ordinary differential equations Convex functions Linear matrix inequalities Numerical stability

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Effect of Handshake in VR Environment via Robotic Arm on Psychological Distance

Effect of Handshake in VR Environment via Robotic Arm on Psy...

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： Haruto Mukuno Daigo Misaki Graduate School of Engineering Mechanical Engineering Program Kogakuin University Tokyo Japan Faculty of Engineering Department of Mechanical Systems Engineering Kogakuin University Tokyo Japan

The COVID-19 pandemic has popularized telework using video chat tools. Although video chat tools allow people to communicate each other in remote locations, psychological distance is longer than face-to-face communication, which may lead to a lack of intimacy. Previous studies have shown that interfaces combining video chat, VR, and robots with handshakes can improve the sense of closeness. However, few studies have focused on the sense of closeness in interfaces combining VR and robots. In this study, we proposed a multimodal interface combining VR and a robotic arm and verified whether shaking hands with a remote partner in VR could shorten the psychological distance compared to video chat. The results showed that the psychological distance was predominantly shorter in VR communication than in video chat communication; however, a handshake using robotic arm did not shorten the psychological distance compared to a handshake without a robotic arm. These results indicate that spatial distance is shorter in VR than in video chat and that robotic arms must be made more human-like.

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Optimized Silicon Nitride-Based Passive Components for 850 nm OCT on Photonic Chips

Optimized Silicon Nitride-Based Passive Components for 850 n...

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2024 Laser Science, LS 2024

作者： Meng, Jiawei Hao, Senyue Adkins, Aaron J. Zhou, Weiyan Zhou, Chao Department of Biomedical Engineering Washington University in St. Louis St. LouisMO63130 United States Department of Electrical & Systems Engineering Washington University in St. Louis St. LouisMO63130 United States Imaging Science PhD Program Washington University in St. Louis St. LouisMO63130 United States

For optical coherence tomography (OCT) on photonic chips, we designed and validated optimized silicon nitride-based passive components for photonic integrated circuits. Centered at 850 nm, these components offer high ... 详细信息

关键词： Silicon nitride

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Going in Circles: Key Aspects for Circular Economy Contributions to Agro-industrial Cooperatives

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Circular Economy and Sustainability 2023年第2期3卷 861-880页

作者： Barros, Murillo Vetroni de Jesus, Rômulo Henrique Gomes Ribeiro, Bruno Silva Piekarski, Cassiano Moro Sustainable Production Systems Laboratory (LESP) Graduate Program in Industrial Engineering (PPGEP) Universidade Tecnológica Federal Do Paraná (UTFPR) Paraná Ponta Grossa Brazil Department of Industrial Engineering Universidade Estadual do Paraná (UNESPAR) Paraná Paranaguá Brazil Sustainable Production Systems Laboratory (LESP) Universidade Tecnológica Federal Do Paraná (UTFPR) Paraná Ponta Grossa Brazil

The global agribusiness context faces at the same time challenges of feeding a growing global population that is used to safe and nutritious food, opportunities based on innovation, high technology and efficiency in the agri-food production systems from field to table. Given the context, this article aims to present the main key aspects of the circular economy to agro-industrial cooperatives. These contributions were named key aspects, such as circular and symbiotic practices, competitive advantages, innovation, cooperation and barriers and opportunities. The field presents a problem that few literature in fact discusses circular economy approaches in the context of agro-industrial cooperatives. As a methodological procedure, a literature review was carried out in three databases to obtain relevant documents and thus analyse and discuss some characteristics based on circular economy practices applied in agro-industrial cooperatives. As a result, a diagnosis of the current scenario that agro sector organizations are facing in terms of the main rural activities and sustainable practices that relate to the circular economy;measures taken to generate competitive advantage;innovation behaviour;and how linear and circular business models are being applied in the agroindustry. A framework is presented to show potential routes strategies for closing the cycle in an agro-industrial cooperative. The opportunities are based on the implementation of high technology in the field, the use of bioenergy and the development of new circular business models throughout the agro-value chain. The study has contributions to rural properties and managers of cooperatives in terms of waste reduction, innovation generation and increases in activities and processes based on circular economy. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Agro-industrial business Circular economy Circularity Cooperation Farm

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Truncated Phase Reversal Fresnel Lens Antenna for mm-Wave and IoT Applications

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IEEE Transactions on Antennas and Propagation 2025年

作者： Al-Alem, Yazan Sifat, Syed M. Antar, Yahia M.M Kishk, Ahmed A. King Fahd University of Petroleum & Minerals Electrical Engineering Department Interdisciplinary Research Center for Communication Systems and Sensing Dhahran31261 Saudi Arabia Concordia University Department of Electrical and Computer Engineering QC Canada Queen’s University Department of Electrical and Computer Engineering ON Canada

A novel design approach for truncating a phase-reversal Fresnel lens is presented. This method relies on focusing the feed antenna’s radiation in a single plane through the use of cascaded dielectric slabs, effectively removing the need for a conventional feeding network. The proposed feed is realized using printed circuit board (PCB) technology, offering a highly economical solution. Its microstrip line feed allows direct integration with transceiver ICs, avoiding the need for complex transitions commonly associated with horn or waveguide feeds. Furthermore, the design is compact and maintains a low-profile structure. The proposed method reduces the lens size by 56%. The resulting lens antenna achieves a peak realized gain of 29 dBi at 30 GHz and has an aperture efficiency of 12%. Its impedance bandwidth is 13.3%, while the 3-dB gain bandwidth is 6.7%. The side-lobes are effectively suppressed, ranging from -10 to -15 dB across the entire operating band. This antenna design is well suited for high-gain millimeter-wave (mm-Wave) and Internet of Things (IoT) applications. © 1963-2012 IEEE.

关键词： Antenna feeders

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