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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Yicheng Zhu Jiarui Zou Nathan M. Ellis Sudhir Kudva Mostafa Mosa C. Thomas Gray Robert C. N. Pilawa-Podgurski Department of Electrical Engineering and Computer Sciences University of California Berkeley Circuits Research Group NVIDIA Corporation

ISBN: (数字)9798350376067

ISBN: (纸本)9798350376074

The power consumption of next-generation high-performance processors is expected to reach and eventually exceed 1000 W, with core logic voltages below 1 V and peak current demand beyond 1000 A. To deliver ultra-high currents at low voltages with minimal power distribution network losses, this paper presents a compact 48-V-to-sub-1-V switching bus converter (SBC), a single-stage hybrid switched-capacitor (SC) voltage regulator for processor vertical power delivery (VPD). The SBC comprises a 2-to-1 SC front-end and two 10-branch series-capacitor buck modules, which are merged through two switching buses. A hardware prototype was designed and built with two-phase coupled inductors for performance validation. The coupled inductors were customized for VPD, with their windings both functioning as part of the coupled inductors and serving as the connection between the SBC and the processor motherboard. The hardware prototype met a stringent maximum height limit of 5 mm and achieved a current density of 0.614 A/mm 2 at a full-load current of 600 A. Additionally, it demonstrated excellent performance compared to the state-of-the-art academic works for 48 V to point-of-load conversion.

关键词： Program processors Density measurement Volume measurement Windings Prototypes Switches Hardware Loss measurement Inductors Voltage control

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Soft Artificial Synapse Electronics

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research 2024年第4期2025卷 101-118页

作者： Md.Rayid Hasan Mojumder Seongchan Kim Cunjiang Yu Department of Electrical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Electrical and Systems Engineering University of PennsylvaniaPhiladelphiaPA 19104USA Department of Electrical and Computer Engineering University of IllinoisUrbana-ChampaignUrbanaIL 61801USA Department of Materials Science and Engineering University of IllinoisUrbana-ChampaignUrbanaIL 61801USA Department of Mechanical Science and Engineering University of IllinoisUrbana-ChampaignUrbanaIL 61801USA Department of Bioengineering University of IllinoisUrbana-ChampaignUrbanaIL 61801USA Materials Research Laboratory University of IllinoisUrbana-ChampaignUrbanaIL 61801USA Beckman Institute for Advanced Science and Technology University of IllinoisUrbana-ChampaignUrbanaIL 61801USA Nick Holonyak Micro and Nanotechnology Laboratory University of IllinoisUrbana-ChampaignUrbanaIL 61801USA

Soft electronics,known for their bendable,stretchable,and flexible properties,are revolutionizing fields such as biomedical sensing,consumer electronics,and robotics.A primary challenge in this domain is achieving low power consumption,often hampered by the limitations of the conventional von Neumann *** response,the development of soft artificial synapses(SASs)has gained substantial *** synapses seek to replicate the signal transmission properties of biological synapses,offering an innovative solution to this *** review explores the materials and device architectures integral to SAS fabrication,emphasizing flexibility and stability under mechanical *** architectures,including floating-gate dielectric,ferroelectric-gate dielectric,and electrolyte-gate dielectric,are analyzed for effective weight control in *** utilization of organic and low-dimensional materials is highlighted,showcasing their plasticity and energy-efficient ***,the paper investigates the integration of functionality into SASs,particularly focusing on devices that autonomously sense external *** SASs,capable of recognizing optical,mechanical,chemical,olfactory,and auditory cues,demonstrate promising applications in computing and sensing.A detailed examination of photo-functionalized,tactile-functionalized,and chemoreception-functionalized SASs reveals their potential in image recognition,tactile sensing,and chemosensory applications,*** study highlights that SASs and functionalized SAS devices hold transformative potential for bioelectronics and sensing for soft-robotics applications;however,further research is necessary to address scalability,longtime stability,and utilizing functionalized SASs for prosthetics and in vivo applications through clinical *** providing a comprehensive overview,this paper contributes to the understanding of SASs,bridging research gaps and paving the way tow

关键词： dielectric utilizing gained

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The Potential of AutoML for Recommender systems 25

The Potential of AutoML for Recommender Systems

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Adjunct Proceedings of the 33rd ACM Conference on User Modeling, Adaptation and Personalization

作者： Tobias Vente Lukas Wegmeth Joeran Beel Intelligent Systems Group University of Siegen Siegen Germany Department of Electrical Engineering and Computer Science University of Siegen Siegen Germany

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Voltage Stability of Spacecraft Electric Power systems for Deep Space Exploration

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IEEE Access 2023年 11卷 38828-38839页

作者： Carbone, Marc A. Sajadi, Amirhossein Murray, Jordan M. Csank, Jeffrey T. Loparo, Kenneth A. Nasa Glenn Research Center Power Management and Distribution Branch ClevelandOH44135 United States University of Colorado Boulder BoulderCO80309 United States Case Western Reserve University Department of Electrical Computer and Systems Engineering ClevelandOH44106 United States

The future of deep space exploration requires high levels of reliability in critical subsystems such as the electrical power system. This paper provides an analysis of voltage stability of direct current (DC) microgrids for spacecraft applications. Bifurcation theory is used to determine the behavior of the system and identify the major causes of voltage instability. The analytical results of the bifurcation model are experimentally verified through a series of tests emulating probable operating conditions of the spacecraft. The findings of this paper are applicable to similar classes of islanded (grid forming) DC electric power systems including aerospace vehicles, shipboard systems, and terrestrial microgrids. © 2013 IEEE.

关键词： Space research

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LSTM-Based Digital Twin Modeling for LVDC Microgrid Operation with Pulsed Load

LSTM-Based Digital Twin Modeling for LVDC Microgrid Operatio...

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IEEE Industry Applications Society Annual Meeting (IAS)

作者： Mahmoud S. Abdelrahman Mustafa Esoofally Hossam Hussein Ibtissam Kharchouf Osama A. Mohammed Department of Electrical and Computer Engineering Energy Systems Research Laboratory Florida International University Miami USA

ISBN: (数字)9798350372717

ISBN: (纸本)9798350372724

Proper control and energy management is crucial for the effective, practical, and reliable operation of DC microgrids. In DC microgrids, the high certainties of renewables and the dynamic behavior of particular loads propose different modeling, operation, and control challenges. With recent advancements in information and communication technologies offering energy solution services relying on data analytics, machine learning (ML), and IoT technologies, the concept of digital twins (DT) has emerged as a feasible and active model to enhance the operation and resilience of microgrids. This paper proposes a long short-term memory (LSTM) neural networkbased strategy to construct a data-driven digital twin (DT) model of DC microgrids. The model is tested and validated with a standalone DC MG containing Renewable Energy Sources (RES), Energy Storage Sources (ESSs), and different load types. The accuracy of the created twin model is tested and evaluated under different scenarios of the microgrid operation, such as a sudden decrease in renewable generation and energizing pulsed load to the MG.

关键词： Renewable energy sources Accuracy Simulation Microgrids Real-time systems Digital twins Reliability Long short term memory Load modeling Resilience

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Shared Information Under Simple Markov Independencies

Shared Information Under Simple Markov Independencies

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IEEE International Symposium on Information Theory

作者： Madhura Pathegama Sagnik Bhattacharya Department of Electrical and Computer Engineering Institute for Systems Research University of Maryland College Park MD USA

ISBN: (数字)9798350382846

ISBN: (纸本)9798350382853

Shared information is a measure of mutual dependence among $m\geq 2$ jointly distributed discrete random variables. We show that the shared information of a Markov random field in which the underlying graph has at least one cut vertex, is the same as the minimum shared information of its blocks (also called biconnected components). This generalizes prior results on shared information of Markov random fields to a much wider class of nontree graphs.

关键词： Random variables Markov random fields Information theory

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On a novel tracking differentiator design based on iterative learning in a moving window

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Control Theory and Technology 2023年第1期21卷 46-55页

作者： Xiangyang Li Rafal Madonski Zhiqiang Gao Senping Tian Key Laboratory of Autonomous Systems and Network Control Ministry of EducationSchool of Automation Science and EngineeringSouth China University of TechnologyGuangzhou 510641China Energy and Electricity Research Center Jinan UniversityZhuhai 519070China Department of Electrical and Computer Science Cleveland State UniversityClevelandOH 44115USA

Differential signals are key in control engineering as they anticipate future behavior of process variables and therefore are critical in formulating control laws such as proportional-integral-derivative(PID).The practical challenge,however,is to extract such signals from noisy measurements and this difficulty is addressed first by *** in the form of linear and nonlinear tracking differentiator(TD).While improvements were made,TD did not completely resolve the conflict between the noise sensitivity and the accuracy and timeliness of the *** two approaches proposed in this paper start with the basic linear TD,but apply iterative learning mechanism to the historical data in a moving window(MW),to form two new iterative learning tracking differentiators(IL-TD):one is a parallel IL-TD using an iterative ladder network structure which is implementable in analog circuits;the other a serial IL-TD which is implementable digitally on any computer *** algorithms are validated in simulations which show that the proposed two IL-TDs have better tracking differentiation and de-noise performance compared to the existing linear TD.

关键词： Tracking differentiator(TD) Iterative learning Iterative learning tracking differentiator(IL-TD) Active disturbance rejection control(ADRC)-Two-dimensional system(2-D system)

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Distributed Consensus Multi-Agent System Control of AC Microgrid Under Various Communication Disturbances

Distributed Consensus Multi-Agent System Control of AC Micro...

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IEEE Industry Applications Society Annual Meeting (IAS)

作者： Ibtissam Kharchouf Mahmoud S. Abdelrahman Hossam M. Hussein S M Sajjad Hossain Rafin Osama A. Mohammed Department of Electrical and Computer Engineering Energy Systems Research Laboratory Florida International University Miami USA

ISBN: (数字)9798350372717

ISBN: (纸本)9798350372724

The resilience of AC microgrids (MGs) in the face of communication disturbances, including variable delays, packet loss, packet corruption (noise), and limited bandwidth, is studied. A Controller Hardware-in-the-Loop (CHIL) platform is used to investigate the ramifications of these disturbances comprehensively. The MG cyber-physical system (CPS) integrates a real-time islanded AC microgrid deployed on RT-LAB, distributed secondary consensus controllers on single-board computers, and a real communication network infrastructure. Through meticulous analysis and experimentation, this research highlights the vulnerabilities of AC MGs to communication disturbances and their detrimental effects on the system resiliency, stability, and efficiency. The experiments emphasize the need for designing robust and adaptive control strategies that can effectively mitigate the effects of communication disruptions and enhance the overall reliability and performance of AC microgrid systems.

关键词： Noise Packet loss Microgrids Bandwidth Cyber-physical systems Stability analysis Real-time systems Delays Resilience Multi-agent systems

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Towards Finding the Sources of Polymorphism in Polymorphic Gates (Invited)

Towards Finding the Sources of Polymorphism in Polymorphic G...

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Asia and South Pacific Design Automation Conference

作者： Timothy Dunlap Zelin Lu Gang Qu Department of Electrical and Computer Engineering Institute for Systems Research University of Maryland College Park MD USA

A polymorphic gate can change its functionality based on external conditions such as temperature, voltage, and external signals. Although this concept was proposed more than two decades ago and has found success in designing circuits for area minimization and security applications, how to construct polymorphic gates remains a challenge because they do not have the structure of conventional CMOS gates. Without knowing the causes of polymorphism, the majority of reported polymorphic gates are generated in the ad-hoc fashion, using evolutionary algorithms and the time-consuming Spice simulation. In this paper, we study thousands of candidate circuits that we have created for the sources of polymorphism. We observe several features that are not present in traditional CMOS gates. Circuit analysis suggests that these features are potential sources of polymorphism, which is confirmed as they exist in the polymorphic gates reported in the literature. Furthermore, we demonstrate with examples that polymorphic gates can be effectively constructed using these features as guidance.

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Sequential Source Selection Based On Evidential Value of Information 26

Sequential Source Selection Based On Evidential Value of Inf...

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26th International Conference on Information Fusion, FUSION 2023

作者： Kowalski, Pawel Jousselme, Anne-Laure Wickramarathne, Thanuka Nato Sto Centre for Maritime Research and Experimentation La Spezia Italy Cs Group Research Laboratory La Garde France University of Massachusetts Lowell Department of Electrical and Computer Engineering LowellMA United States

ISBN: (纸本)9798890344854

Epistemic decisions about which sources to trust and query are critical for a decision-maker, when the end-goal decisions are to be made using limited resources. Toward this, we previously proposed preliminary extensions to classical measures of Value of Information (VoI) for imprecise belief states represented by belief functions relying on a general observation model. These methods primarily aim to assist a decision-maker toward making rational decisions, by generating necessary metadata about the information that is being considered for the decision-making task (e.g. probability of source reliability, degree of self-confidence expressed by the source). In this paper, we explore the behavior and performance of our previously proposed belief theoretic VoI measures, the Evidential Expecetd Value of Sampled Information (EEVSI), and propose a procedure to sequentially select sources to query. We also consider the case where the information sources are providing contradictory evidence. We leverage a maritime surveillance scenario, where the decision-maker has to make a rational ordered selection of information sources among a set of both physical sensors and human sources, to illustrate the behavior of the proposed method. We compare the proposed policy with a traditional probability-based approach in a simulation environment. We conclude by providing some insights on future research directions to further expand on our proposed new measures. © 2023 International Society of Information Fusion.

关键词： Decision making

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