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arXiv 2024年

作者： Rikos, Apostolos I. Jiang, Wei Charalambous, Themistoklis Johansson, Karl H. Guangzhou China Department of Computer Science and Engineering The Hong Kong University of Science and Technology Clear Water Bay Hong Kong Department of Electrical Engineering and Automation School of Electrical Engineering Aalto University Espoo Finland Department of Electrical and Computer Engineering School of Engineering University of Cyprus Nicosia1678 Cyprus Division of Decision and Control Systems KTH Royal Institute of Technology StockholmSE-100 44 Sweden

In realistic distributed optimization scenarios, individual nodes possess only partial information and communicate over bandwidth constrained channels. For this reason, the development of efficient distributed algorithms is essential. In our paper we addresses the challenge of unconstrained distributed optimization. In our scenario each node’s local function exhibits strong convexity with Lipschitz continuous gradients. The exchange of information between nodes occurs through 3-bit bandwidth-limited channels (i.e., nodes exchange messages represented by a only 3-bits). Our proposed algorithm respects the network’s bandwidth constraints by leveraging zoom-in and zoom-out operations to adjust quantizer parameters dynamically. We show that during our algorithm’s operation nodes are able to converge to the exact optimal solution. Furthermore, we show that our algorithm achieves a linear convergence rate to the optimal solution. We conclude the paper with simulations that highlight our algorithm’s unique characteristics. © 2024, CC BY.

关键词： Optimization algorithms

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Output Feedback Position Tracking Control of Marine Vessels Subject to Periodic Disturbances

Output Feedback Position Tracking Control of Marine Vessels ...

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American Control Conference (ACC)

作者： Deniz Kurtoglu Enver Tatlicioglu Erkan Zergeroglu Department of Mechanical Engineering Laboratory for Autonomy Control Information and Systems (LACIS) University of South Florida Tampa FL United States of America Department of Electrical Electronics Engineering Ege University Izmir Turkey Department of Computer Engineering Gebze Technical University Gebze Kocaeli Turkey

ISBN: (数字)9798350382655

ISBN: (纸本)9798350382662

This work deals with the design and implementation of a novel output feedback position tracking controller for marine vessels subject to uncertainties in their dynamical parameters and periodic external disturbance. Specifically, an adaptive controller that does not make use of velocity measurements has been presented which can compensate for uncertainties in the system's dynamical parameters and periodic external disturbance. A filtered based velocity surrogate formulation in conjunction with a periodic noise estimator and a desired model compensation based adaptive parameter estimator have been utilized to tackle the problem. Boundedness of the closed loop system and convergence of the position tracking error to the origin are proven via Lyapunov-type arguments. Comparative numerical simulations are presented to illustrate the effectiveness of the proposed controller.

关键词： Uncertain systems Uncertainty Noise Estimation Numerical simulation Filtering theory Numerical models

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Perception Without Vision for Trajectory Prediction: Ego Vehicle Dynamics as Scene Representation for Efficient Active Learning in Autonomous Driving

arXiv

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arXiv 2024年

作者： Greer, Ross Trivedi, Mohan M. The Laboratory for Intelligent and Safe Automobiles Department of Electrical and Computer Engineering University of California San Diego La Jolla CA92092 United States

This study investigates the use of trajectory and dynamic state information for efficient data curation in autonomous driving machine learning tasks. We propose methods for clustering trajectory-states and sampling strategies in an active learning framework, aiming to reduce annotation and data costs while maintaining model performance. Our approach leverages trajectory information to guide data selection, promoting diversity in the training data. We demonstrate the effectiveness of our methods on the trajectory prediction task using the nuScenes dataset, showing consistent performance gains over random sampling across different data pool sizes, and even reaching sub-baseline displacement errors at just 50% of the data cost. Our results suggest that sampling typical data initially helps overcome the "cold start problem," while introducing novelty becomes more beneficial as the training pool size increases. By integrating trajectory-state-informed active learning, we demonstrate that more efficient and robust autonomous driving systems are possible and practical using low-cost data curation strategies. Copyright © 2024, The Authors. All rights reserved.

关键词： Autonomous vehicles

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Optimal Sensor Placement for Full-Set TDOA Localization Accounting for Sensor Location Errors

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IEEE Transactions on Aerospace and Electronic systems 2025年

作者： Zhang, Chengjie Han, Xinyang Kong, He Ho, K.C. Southern University of Science and Technology Shenzhen Key Laboratory of Control Theory and Intelligent Systems Guangdong Provincial Key Laboratory of Fully Actuated System Control Theory and Technology Shenzhen518055 China University of Missouri Electrical Engineering and Computer Science Department ColumbiaMO65211 United States

The positioning accuracy of a signal source is influenced by where the sensors are deployed. Studies in the literature for the optimal sensor placement (OSP) of localization often ignore the presence of sensor position errors. In practice, however, it is impossible to place the sensors precisely at the desired locations. This work designs OSP by accounting for the presence of Gaussian sensor position errors that are independent and identically distributed (IID), with the full set of Time Difference of Arrival measurements corrupted by Gaussian IID noise. The criterion is the A-optimality equal to the trace of the source position Cramer-Rao Bound (CRB). We show that the presence of sensor position errors introduces a multiplication factor to the same criterion for the case without sensor position errors. The latter factor is dependent on the ratio of the sensor position error power to the range difference noise power but independent of the sensor positions, implying that the A-optimality OSP in the presence of sensor position errors is the same as in the absence. To our knowledge, this is the first time such results have been derived. Simulation studies validate the derived OSP, show the minimal OSP performance gap with sensor positioning error and without, and illustrate the better source localization accuracy by OSP. © 1965-2011 IEEE.

关键词： Cramer-Rao bounds

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Novel Generation Injection Solution for Security Constrained Optimal Power Flow of Utility Practical Transmission Utility Network 5

Novel Generation Injection Solution for Security Constrained...

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5th IEEE Global Conference for Advancement in Technology, GCAT 2024

作者： Singh, Bhoori Sharma, Avdhesh Garg, Akhil Ranjan Mahela, Om Prakash Khan, Baseem Mbm University Department of Electrical Engineering Jodhpur India Rajasthan Rajya Vidyut Prasaran Nigam Ltd. Power System Planning Division Jaipur India Innovader Research Labs Innovader IITian Padhaiwala LearnlAb Pvt. Ltd. Jaipur India Hawassa University Department of Electrical and Computer Engineering Ethiopia Center for Renewable Energy and Microgrids Huanjiang Laboratory Zhejiang University Zhuji311816 China Western Caspian University Department of Technical Sciences Baku Azerbaijan

ISBN: (纸本)9798350376685

The security constrained optimal power flow (SCOPF) optimally configures and dispatches the power system in normal conditions to ensure that steady-state operating conditions do not exceed the emergency ratings when contingency is observed. Suitable methods of SCOPF helps to operate the grid optimally. Hence, this paper discussed a SCOPF considering the transmission loss minimization and minimization of bus voltage deviation (BVD). Study is performed for base case of a practical transmission utility network (TUN) and proposed case TUN by addition of a thermal power plant (TPP). TPP addition improves the voltage profile of the TUN buses, minimizes BVD and transmission losses of TUN. Study is performed using the MiPower software. Proposed study is effective compared to many studies reported in literature for a practical transmission grid. © 2024 IEEE.

关键词： Load flow optimization

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Staggered Microstrip Grating Structure for Sheet-Beam TWTs

Staggered Microstrip Grating Structure for Sheet-Beam TWTs

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International Conference on Vacuum Electronics

作者： Robert Marosi Muhammed Zuboraj Filippo Capolino Department of Electrical Engineering and Computer Science University of California Irvine CA USA Los Alamos National Laboratory Los Alamos NM USA

ISBN: (数字)9798350348705

ISBN: (纸本)9798350348712

We introduce a simple geometry for slow-wave structures (SWSs) in sheet-beam traveling-wave tubes (TWTs). The staggered microstrip grating SWS is a space harmonic structure with geometry and bandwidth with analogous to the staggered vane SWS commonly used for sheet beam TWTs. The staggered microstrip grating TWT is designed to operate in V-band with a center frequency of 74 GHz and electron beam voltage of 20 kV.

关键词： Geometry Microstrip antenna arrays Electron beams Voltage Harmonic analysis Space exploration Microstrip Gratings Vacuum electronics Electron sources

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GPU-Accelerated 3D Polygon Visibility Volumes for Synergistic Perception and Navigation

GPU-Accelerated 3D Polygon Visibility Volumes for Synergisti...

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IEEE Southeastcon

作者： Andrew Willis Collin Hague Artur Wolek Kevin Brink Department of Electrical and Computer Engineering Department of Mechanical Engineering and Engineering Science University of North Carolina at Charlotte Charlotte NC USA Air Force Research Laboratory Eglin AFB FL USA

UAV missions often require specific geometric con-straints to be satisfied between ground locations and the vehicle location. Such requirements are typical for contexts where line-of-sight must be maintained between the vehicle location and the ground control location and are also important in surveillance applications where the UAV wishes to be able to sense, e.g., with a camera sensor, a specific region within a complex geometric environment. This problem is further complicated when the ground location is generalized to a convex 2D polygonal region. This article describes the theory and implementation of a system which can quickly calculate the 3D volume that encloses all 3D coordinates from which a 2D convex planar region can be entirely viewed; referred to as a visibility volume. The proposed approach computes visibility volumes using a combination of depth map computation using GPU-acceleration and geometric boolean operations. Solutions to this problem require complex 3D geometric analysis techniques that must execute using arbitrary precision arithmetic on a collection of discontinuous and non-analytic surfaces. Post-processing steps incorporate navigational constraints to further restrict the enclosed coordinates to include both visibility and navigation constraints. Integration of sensing visibility constraints with navigational constraints yields a range of navigable space where a vehicle will satisfy both perceptual sensing and navigational needs of the mission. This algorithm then provides a synergistic perception and navigation sensitive solution yielding a volume of coordinates in 3D that satisfy both the mission path and sensing needs.

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Rechargeable Battery State Estimation Based on Adaptive-Rate Processing and Machine Learning

Rechargeable Battery State Estimation Based on Adaptive-Rate...

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Advanced Innovations in Smart Cities (ICAISC), International Conference on

作者： Afnan Alyoucef Saeed Mian Qaisar Meriem Hafsi Electrical and Computer Engineering Department Effat University Jeddah Saudi Arabia LINEACT Laboratory CESI Engineering School Villeurbanne France

The generalization of the use of electronic systems and their integration in industrial systems and different aspects of modern life (internet of things, electric vehicles, robotics, smart grids), give rise to new challenges related to the storage and optimized management of energy. Lithium-on batteries perfectly meet this objective due to their good qualities such as high energy density, small installation size, low self-discharge and high supply capacity. However, their wide application requires further research on battery failure prediction and health management. Intelligent “battery management systems” (BMSs) employ the real-time estimation and control algorithms to improve the battery safety while enhancing its performance. Nevertheless, BMS are complex and require increased processing power which could lead to more power consumption. In this context, the present article provides a new approach for efficient prediction of the “Lithiumion” (Li-ion) battery cells capacities by analysing and exploiting the battery parameters, acquired by an event-driven module. It acquires the intended cells voltages, currents and temperature values during the charge-discharge cycles. The solution is based on the machine learning algorithms and event-based segmentation. The “National Aeronautics and Space Administration” (NASA) has provided a high-power Li-Ion cells dataset for the purpose of research and innovation. This dataset is used to test and evaluate the suggested approach. The evaluation of the overall performance of the chain has shown encouraging results of the proposed approach.

关键词： Lithium-ion batteries Technological innovation Smart cities Service robots Feature extraction Prediction algorithms Real-time systems

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On the Implementation and Security Analysis of Routable-GOOSE Messages Based on IEC 61850 Standard

On the Implementation and Security Analysis of Routable-GOOS...

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International Conference on Environment and electrical engineering (EEEIC)

作者： Ibtissam Kharchouf Abdulmeen Alrashide Mahmoud S. Abdelrahman Osama A. Mohammed Department of Electrical and Computer Engineering Energy Systems Research Laboratory Florida International University Miami FL USA

ISBN: (数字)9781665485371

ISBN: (纸本)9781665485388

Advanced smart grid applications such as wide-area monitoring, protection, and control (WAMPAC), considerably depend on the synchrophasor measurements gathered from different locations of the power grid. These timestamped measurements are provided by Phasor measurement units (PMUs) and phasor data concentrators (PDCs). These devices are optimally deployed at selected nodes in the grid. PMUs and substation PDCs are routable protocol-based network devices and comply with the IEEE C37.118 standard. Since the PMUs generally communicate through a public wide area network, they are vulnerable to cyberattacks. As a result, these vulnerabilities lead to compromised data integrity, confidentiality, and availability of the smart grid. To cover the cybersecurity vulnerabilities in synchrophasor communication and achieve compatibility between the data transfer based on IEEE C37.118.2 with IEC 61850 standard, IEC 61850-90-5 was released. This part of the standard includes security measures to achieve authentication, integrity, and confidentiality if required. In this work, we implemented publisher and subscriber libraries capable of routing secure GOOSE messages while respecting the time delay specifications set by the IEC61850 standard. The performance of encryption and authentication algorithms was assessed and experimentally verified. In addition, the proposed framework's robustness against cyber-attacks was evaluated.

关键词： Wide area networks Authentication Phasor measurement units Robustness Libraries Smart grids Encryption

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Temperature Sensing with Reduced dn/dT Helical Fibers

Temperature Sensing with Reduced dn/dT Helical Fibers

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CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

作者： Campbell, Jennifer Pietros, Alexander R. Dragic, Peter D. Laboratory The Holonyak Micro and Nanotechnology Laboratory 208 N Wright St UrbanaIL61801 United States Department of Physics University of Illinois Urbana-Champaign 1110 W Green St UrbanaIL61801 United States Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign 208 N Wright St UrbanaIL61801 United States

Temperature sensing based on low dn/dT helical glass core fiber is described. These fibers possess intrinsic bend loss with attenuation that is a strong function of temperature. A proof of concept over 25-80°C is... 详细信息

ISBN: (纸本)9781957171395

关键词： Glass fibers

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