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The Modified hybrid Multi-Objective Genetic Algorithm and Loss Sensitivity Factor for Optimal Siting and Sizing of PV-Based Distributed Generation in Distribution Networks 4

The Modified hybrid Multi-Objective Genetic Algorithm and Lo...

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4th IEEE International Multidisciplinary Conference on engineering Technology, IMCET 2023

作者： Korkmaz, Jessica Ghajar, Raymond Lebanese American University Department of Electrical & Computer Engineering Byblos Lebanon

ISBN: (纸本)9798350313826

Many optimization algorithms have been developed for the problem of optimal siting and sizing of Photo-Voltaic (PV) Distributed Generators (DGs) in distribution networks. However, most of them fail to include a clear solar potential assessment at the buses of these networks. In this paper, two well-known algorithms, the Multi-Objective Genetic Algorithm (MOGA) and Loss Sensitivity Factor (LSF) are combined to form the Modified hybrid MOGA-LSF algorithm that extends the hybrid MOGA-LSF formulation to include a solar potential assessment at each bus of the network and jointly minimize active power losses, voltage deviations, and energy costs. The proposed hybrid algorithm is tested on the IEEE-15 bus radial distribution network and compared to the conventional MOGA. The resulting PV DGs allocations show that solar potential is a determinant factor in the optimal siting and sizing of PV DGs in distribution networks. © 2023 IEEE.

关键词： Distributed power generation

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Reconfigurable Hybrid Asymmetrical Load Modulated Balanced Amplifier with High Linearity, Wide Bandwidth, and Load Insensitivity

Reconfigurable Hybrid Asymmetrical Load Modulated Balanced A...

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2023 IEEE/MTT-S International Microwave Symposium, IMS 2023

作者： Guo, Jiachen Chen, Kenle University of Central Florida Department of Electrical and Computer Engineering United States

ISBN: (纸本)9798350347647

This paper presents the first-ever load-insensitive and highly linear three-way load-modulation power amplifier (PA) based on reconfigurable hybrid asymmetrical load modulated balanced amplifier (H-ALMBA). Through proper amplitude and phase controls, the carrier, control amplifier (CA), and two peaking balanced amplifiers (BA1 and BA2) can form a linear high-order load modulation over wide bandwidth. Moreover, it is theoretically unveiled that once CA reaches saturation at the pre-determined power back-off (PBO), its current- and voltage-source duality makes the primary (BA1) and secondary (BA2) peaking amplifiers have complementary load dependence. As such, the PA's linearity and efficiency profiles can be maintained against arbitrary load mismatch through ZL-dependent reconfiguration of CA supply voltage (VDD,CA) and turning-on sequence of BA1 and BA2. Based on the proposed theory, an RF-input H-ALMBA is developed with GaN transistors and wideband quadrature hybrids. Over the design bandwidth from 1.7-2.9 GHz, an efficiency of 57%-72% at peak power and 43%-53% at 10-dB PBO are measured together with linear AMAM and AMPM responses. In modulated evaluation with 4GLTE signal, an EVM of 3.1%, ACPR of -39 dB, and average efficiency of up to 52% are measured, which are well sustained against 2 : 1 VSWR of load through reconfiguration. © 2023 IEEE.

关键词： Peak to average power ratio

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An Efficient Beam-Sharing Algorithm for RIS-aided Simultaneous Wireless Information and Power Transfer Applications 48

An Efficient Beam-Sharing Algorithm for RIS-aided Simultaneo...

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48th IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2023

作者： Tran, Nguyen Minh Amri, Muhammad Miftahul Park, Je Hyeon Kim, Dong In Choi, Kae Won Sungkyunkwan University Department of Electrical and Computer Engineering Suwon Korea Republic of

ISBN: (纸本)9781728163277

Simultaneous wireless information and power transfer (SWIPT) is a key technology for enabling future high-tech lifestyles by guaranteeing the perpetual operation of trillions of low-power IoT devices. Currently, reconfigurable intelligent surface (RIS) is a promising technology for achieving cost- effective and energy-efficient wireless technologies. In this paper, we propose an efficient beam-sharing algorithm for RIS-aided SWIPT systems. The proposed algorithm maximizes the power transferred from the power transmitter (Ptx) to the power user (PU) while minimizing that to the data user (DU) but maximizing the signal from the data transmitter (Dtx) to DU. Simulation results demonstrate that the proposed beam-sharing algorithm effectively delivers power from Ptx to PU while limiting the power sent by Ptx to DU but maximizing the received signal from Dtx. © 2023 IEEE.

关键词： beam splitting reconfigurable intelligent surface SWIPT

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Optimal Design of Asymmetrical Rotor with MAS Method for Improving Torque Density of PMa-SynRM in High-Speed Railway Applications 26

Optimal Design of Asymmetrical Rotor with MAS Method for Imp...

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26th International Conference on electrical Machines and Systems, ICEMS 2023

作者： Lee, Sung-Chang Kang, Do Hyun Kang, Seung-Gu Yoon, Han-Joon Jung, Seok-Won Jung, Sang-Yong Sungkyunkwan University Department of Electrical and Computer Engineering Suwon Korea Republic of

ISBN: (纸本)9798350317589

In this paper, a novel approach is introduced to enhance the torque density of a permanent magnet-assisted synchronous reluctance motor (PMa-SynRM). The PMa-SynRM reduces permanent magnet usage by leveraging both reluctance and magnetic torques along the q-axis and d-axis. In this study, our objective was to enhance torque density by minimizing the phase difference between the d-axis and q-axis, which in turn narrows the gap between the reluctance and magnetic torques. The Magnet Axis Shift (MAS) method was employed to effectively reduce the phase difference between the two axes. Additionally, motors used in high-speed railways actively employ regenerative braking during deceleration, leading to limitations posed by back electromotive force (BEMF). Using Finite Element Analysis (FEA), we compared the performance of both Conventional PMa-SynRM and MAS PMa-SynRM. As a result, it was confirmed that the MAS PMa-SynRM is suitable for high-speed railway applications due to the improvement in torque density and reduction in BEMF, as demonstrated through the analysis. © 2023 IEEE.

关键词： Permanent magnets

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Retinomorphic Channel Design and Considerations 57

Retinomorphic Channel Design and Considerations

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57th Annual Conference on Information Sciences and Systems, CISS 2023

作者： Sengupta, Jonah P. Andreou, Andreas G. Johns Hopkins University Department of Electrical and Computer Engineering United States

ISBN: (纸本)9781665451819

By extrapolating functionality from the retina, retinomorphic engineering has yielded devices that have shown promise to alleviate the challenges presented in modern computer vision tasks. An incredible amount of work has been devoted in recent years to the development and deployment of these event-based vision sensors in applications requiring low-latency, energy-efficient, high dynamic range sensing solutions. However, not much work has been devoted to the area, energy, and speed analysis of the various encoding and decoding mechanisms necessary for sensory pipelines. This paper outlines an empirical framework that presents a clear tradeoff between the various methodologies to transduce physical information in to spikes (encoding) and reconstruct said stimuli from the incident events (decoding). Software-based models of these methodologies were constructed to evaluate the accuracy of stimuli reconstruction for a variety of input profiles. As a result, it is shown that an optimized retinomorphic architecture for a specific set of system-driven cost metrics requires a heterogenous fabric of encoders with a composition of 95% temporal contrast pixels and 5% intensity encoder assuming a temporal jitter of 1μs. Much like the composition of ganglion cells in magno- and parvo-cellular pathway, this multi-modal solution provides the most time, area, and power efficient method to convey visual data. © 2023 IEEE.

关键词： Sensory analysis

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Securing the Smart Grid: A Review on Digital Twins for Cyber Resilience

Securing the Smart Grid: A Review on Digital Twins for Cyber...

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2023 IEEE International Conference on Energy Technologies for Future Grids, ETFG 2023

作者： Anto, Kelvin Marattukalam, Felix Roop, Partha S. Swain, Akshya K. The University of Auckland Department of Electrical Computer and Software Engineering New Zealand

ISBN: (纸本)9781665471640

In recent years, the integration of computation, communication, and physical systems has led to the emergence of a new paradigm called Cyber-Physical Systems (CPSs). Examples of CPS are ubiquitous, including home automation, intelligent transportation, and power grids. While CPS holds immense promise with its myriad benefits, it possesses several safety, stability, and resilience challenges. Digital Twin (DT), a virtual replica of a physical system or process, emerges as a potential panacea to address the pressing concerns of CPS. The present study makes a comprehensive survey of the existing research work on DT to enhance the security of CPS, with special emphasis on modern smart grids. Although this survey focuses on existing applications of DT in smart grids, the findings can be applied to generic CPS. Additionally, we propose a secure DT architecture incorporating runtime enforcement and runtime verification mechanisms, providing a robust approach to ensure the security and reliability of CPS applications. © 2023 IEEE.

关键词： Cyber attacks Digital Twins formal methods security evaluation Smart grids

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Combining Cubic Dynamical Solvers with Make/Break Heuristics to Solve SAT 26

Combining Cubic Dynamical Solvers with Make/Break Heuristics...

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26th International Conference on Theory and Applications of Satisfiability Testing, SAT 2023

作者： Sharma, Anshujit Burns, Matthew Huang, Michael C. Department of Electrical and Computer Engineering University of Rochester NY United States

ISBN: (纸本)9783959772860

Dynamical solvers for combinatorial optimization are usually based on 2nd degree polynomial interactions, such as the Ising model. These exhibit high success for problems that map naturally to their formulation. However, SAT requires higher degree of interactions. As such, these quadratic dynamical solvers (QDS) have shown poor solution quality due to excessive auxiliary variables and the resulting increase in search-space complexity. Thus recently, a series of cubic dynamical solver (CDS) models have been proposed for SAT and other problems. We show that such problem-Agnostic CDS models still perform poorly on moderate to large problems, thus motivating the need to utilize SAT-specific heuristics. With this insight, our contributions can be summarized into three points. First, we demonstrate that existing make-only heuristics perform poorly on scale-free, industrial-like problems when integrated into CDS. This motivates us to utilize break counts as well. Second, we derive a relationship between make/break and the CDS formulation to efficiently recover break counts. Finally, we utilize this relationship to propose a new make/break heuristic and combine it with a state-of-The-Art CDS which is projected to solve SAT problems several orders of magnitude faster than existing software solvers. © 2023 Schloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing. All rights reserved.

关键词： Combinatorial optimization

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A Low-Ripple Switched-Capacitor-based DC-DC Converter with Optimal Efficiency Tracking for Self-Powered Wearable Devices

A Low-Ripple Switched-Capacitor-based DC-DC Converter with O...

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2023 IEEE Biomedical Circuits and Systems Conference, BioCAS 2023

作者： Zhao, Linran Jia, Yaoyao The University of Texas at Austin Department of Electrical and Computer Engineering United States

ISBN: (纸本)9798350300260

This paper presents a low-ripple, switched-capacitor-based DC-DC converter with an optimal efficiency tracking scheme. The proposed converter that interfaces with energy harvesters, such as thermoelectric generators (TEG) and photovoltaic (PV) solar cells, provides a supply voltage with minimized ripples to the sensing units in self-powered wearable health monitoring devices. The proposed converter employs a reconfigurable charge pump (RCP) with 7 conversion ratios (CRs), a CR tunning loop, and a voltage regulation loop (VRL). The CR tunning loop adjusts the CR to its optimal value not only for adapting input voltage changes across a range of 0.35 - 1 V but also for tracking the optimal end-to-end power conversion efficiency (ηEE). Under each CR, the VRL controls the RCP to regulate the output voltage at 2 V. The output ripples are below 1 mV, eliminating the need for an extra regulator. The converter can provide up to 200 μA load current and achieve a peak ηEE of 74.5%. In addition, the converter implemented a cold start charge pump to enable self-sustained operation. The proposed DC-DC converter was fabricated in a 180 nm standard CMOS process and occupied a silicon area of 2.7 mm2. © 2023 IEEE.

关键词： DC-DC converter energy harvesting health monitoring wearable devices switched capacitor

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Deep Q-Learning-Based Resource Management in IRS-Assisted VLC Systems

IEEE Transactions on Machine Learning in Communications and ...

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IEEE Transactions on Machine Learning in Communications and Networking 2024年 2卷 34-48页

作者： Hammadi, Ahmed Al Bariah, Lina Muhaidat, Sami Al-Qutayri, Mahmoud Sofotasios, Paschalis C. Debbah, Merouane Technology Innovation Institute Abu Dhabi United Arab Emirates Khalifa University Center for Cyber-Physical Systems Department of Electrical Engineering and Computer Science Abu Dhabi United Arab Emirates Carleton University Department of Systems and Computer Engineering OttawaK1S 5B6 Canada Khalifa University Department of Electrical Engineering and Computer Science Abu Dhabi United Arab Emirates Tampere University Department of Electrical Engineering Tampere33014 Finland Khalifa University KU 6G Center Abu Dhabi United Arab Emirates

Visible Light Communication (VLC) is a promising enabling technology for the next-generation wireless networks, as it complements radio-frequency (RF)-based communications by providing wider bandwidth, higher data rates, and immunity to interference from electromagnetic sources. However, due to its unique characteristics, VLC is highly sensitive to the line-of-sight (LoS) blockage. Recently, intelligent reflecting surface (IRS) has been proposed as an innovative solution that dynamically reconfigures the wireless environment. The present contribution proposes a two-stage resource management framework in an indoor VLC system: In the first stage, a maximum possible fairness (MPF) algorithm is presented in order to maximize the fairness amongst the users. In the second stage, deep Q-learning is exploited in order to maximize the overall spectral efficiency (SE). The corresponding numerical results have shown that the proposed DQL-MPF framework exhibits superior performance in terms of both the overall SE and Jain's Fair Index, achieved at a fast convergence rate. More specifically, when the noise power is high and the number of users is relatively large, the DQL-MPF algorithm achieves a more than tenfold overall SE compared to the Baseline scheme. Moreover, the synergy between the MPF and the DQL algorithms is investigated. To this end, we demonstrate that the MPF algorithm maximizes the fairness amongst the users while the DQL algorithm maximizes the overall SE and improves the robustness against the noise. Our results also highlight the effectiveness of the proposed algorithm in leveraging the increasing number of IRS elements for optimized performance. © 2023 The Authors.

关键词： Spectrum efficiency

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Effect of respiration harmonics on beat-to-beat analysis of heart signal

Effect of respiration harmonics on beat-to-beat analysis of ...

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2023 IEEE/MTT-S International Microwave Symposium, IMS 2023

作者： Sameera, Jannatun Noor Ishrak, Mohammad Shadman Lubecke, Victor Boric-Lubecke, Olga University of Hawaii at Manoa Department of Electrical and Computer Engineering United States

ISBN: (纸本)9798350347647

Doppler radar is a promising tool for non-invasive physiological monitoring. However, its output signal is affected by respiration harmonics interference due to inherent respiratory features and a radar detection method. Respiration harmonics present a challenge for sophisticated beat-to-beat analysis of heart signals for extraction of heart rate variability (HRV) parameters. This paper discusses causes of these harmonics along with proposing the utilization of maximal overlap discrete wavelet transform (MODWT) for minimizing their interference. The results are presented in terms of average heart rate and the standard deviation of interbeat intervals (SDNN). Adaptive notch filter is used for comparing the effect of harmonics cancellation on beat-to-beat analysis of heart signals. Compared to the results of the notch filter, the SDNN difference from MODWT is lowered by 5.12% to 91.43%. © 2023 IEEE.

关键词： Doppler radar

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