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16th International Conference on Communication Software and Networks, ICCSN 2024

作者： Chen, Guanxu Wang, Gang Ningbo University Faculty of Electrical Engineering and Computer Science Ningbo China

ISBN: (纸本)9798331506322

In this paper, we address the underwater localization problem with isogradient sound speed profile (SSP) using time-of-arrival (TOA) measurements. The sound speed is related to the unknown source depth in the isogradient SSP model, which is highly nonlinear. Owing to this nature of the isogradient SSP model, the maximum likelihood (ML) problem for estimating the source position is non-convex such that local convergence may occur without sufficiently good initialization. To address this difficulty, we first approximate the isogradient SSP model, and then propose a closed-form two-step weighted least squares (TSWLS) method for estimating the source position based on the approximate model. The solution method is accurate since the approximate model takes the source depth into consideration, and can be used to solve the ML problem as an initialization. Moreover, the proposed TSWLS solution is simple and computationally attractive since it is in closed form. Simulation results show that the proposed TSWLS solution is sufficiently accurate and can be used as the initial estimate for solving the non-convex ML problem, such that the mean square error (MSE) of the ML solution can reach the Cramér-Rao lower bound (CRLB). Index Terms-Underwater localization, time-of-arrival, isogradient sound speed profile, two-step weighted least squares. © 2024 IEEE.

关键词： Mean square error

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Modelling of Power System Restoration of a Synchronous Generator-Driven Network 12

Modelling of Power System Restoration of a Synchronous Gener...

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12th International electrical engineering Congress, iEECON 2024

作者： De Silva, Hasini Nadarajah, Mithulananthan Haque, Mejbaul Shafiq, Saifullah School Of Electrical Engineering And Computer Science University Of Queensland Brisbane Australia

ISBN: (纸本)9798350383591

A power system blackout is a high-impact but low-probable event. Power system restoration, after a complete blackout, creates substantial challenges for power system operators. To restore the system within a minimum time, the system operators develop and design the system restoration manuals including standards and guidelines. In order to develop these manuals, modelling and simulation tools are required. This paper discusses how to model and simulate a sequential 'bottom-up' power system restoration strategy and develop the 'power restoration curve'. The restoration curve graphically represents the power exported by the generators over time. It is used to visualize how quickly the black system can be restored. Based on the perspective of the transmission system operator and power plant operator, the modified IEEE 9 bus system was modelled in DIgSILENT Power Factory to model a system restoration. The system focuses on parameters such as black start capability, reactive power capability, frequency, voltage, and load pickup. The power restoration curve has been developed using simulated results. Using these analyses, a sequential strategy is formulated for a safe and efficient power system restoration. © 2024 IEEE.

关键词： Restoration

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Relation Between electrical Grid Congestion and Bus Characteristics

Relation Between Electrical Grid Congestion and Bus Characte...

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2024 IEEE PES Innovative Smart Grid Technologies Europe Conference, ISGT EUROPE 2024

作者： Verdaasdonk, Flin Vlasiou, Maria Hoogsteen, Gerwin Hurink, Johann University of Twente Department of Electrical Engineering Mathematics Computer Science Netherlands

ISBN: (纸本)9789531842976

electrical grids are increasingly congested, which causes stability and safety risks. To get more insights in how congestion can be managed, this paper analyses whether bus characteristics exist that have a consistent influence on grid loading. To study this, a metric for quantifying bus influence on grid loading is introduced and applied in two case studies. The first case study investigates if there are characteristics that correlate with congestion consistently, regardless of grid topology. The results from this case study suggest that none of the evaluated characteristics consistently correlate with grid loading. These results imply that topology should be explicitly considered in congestion management. The second case study investigates the variance in the correlation between bus characteristics and influence, within a single topology, over a variety of conditions. The results of the second case study suggest that this correlation is robust to reasonable changes in bus loads. © 2024 IEEE.

关键词： Sensitivity analysis

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Cascaded Shadowed UAV-to-Ground Channels 10

Cascaded Shadowed UAV-to-Ground Channels

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10th IEEE World Forum on Internet of Things, WF-IoT 2024

作者： Polus, Remon D'amours, Claude University of Ottawa School of Electrical Engineering and Computer Science Ottawa Canada

ISBN: (纸本)9798350373011

In this paper, cascaded shadowed uncrewed aerial vehicles (UAVs)-to-ground fading channels are introduced and mathematically characterized. This is done in order to provide a comprehensive statistical analysis by deriving expressions for their probability density function (PDF) and cumulative distribution function (CDF). This lays the groundwork for modeling and analyzing the reliability of wireless communication systems operating over such channels. Utilizing these expressions, key metrics such as the outage probability, average channel capacity, and average bit error probability are derived. The Meijer G function is employed to express these metrics in closed-form expressions. To validate our analysis, Monte-Carlo simulations are conducted, demonstrating the effectiveness and accuracy of our analytical framework. Index Terms-Beyond 5G communications, uncrewed aerial vehicles (UAVs), cascaded channels. © 2024 IEEE.

关键词： Distribution functions

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Performance Gain Analysis for Introducing Relays to Rigid Body Localization Using TOAs and AOAs 16

Performance Gain Analysis for Introducing Relays to Rigid Bo...

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16th International Conference on Communication Software and Networks, ICCSN 2024

作者： Chen, Tianye Wang, Gang Ningbo University Faculty of Electrical Engineering and Computer Science Ningbo China

ISBN: (纸本)9798331506322

This paper analyzes the performance gain of rigid body localization (RBL) using time-of-arrival (TOA) and angle-of-arrival (AOA) measurements, when introducing non-regenerative relays having unknown positions. Although the introduction of the relays can generate more measurements, more unknown parameters are also introduces since the relay positions are not known. Hence, it is not clear whether the additional non-regenerative relays can improve the localization performance of the rigid body. To answer this question, we conduct the Cramer-Rao lower bound (CRLB) analysis and show theoretically that the answer to this question is affirmative. Simulation results confirm the correctness of the theoretical result. © 2024 IEEE.

关键词： Cramer-Rao bounds

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A Sub-nanosecond Delay Floating-voltage Level Shifter for SiC MOSFETs Gate Driver Application 6

A Sub-nanosecond Delay Floating-voltage Level Shifter for Si...

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6th International Conference on Energy Systems and electrical Power, ICESEP 2024

作者： Wan, Yue Xia, Yinshui Ningbo University Faculty of Electrical Engineering and Computer Science Ningbo China

ISBN: (纸本)9798350353563

In order to meet the requirements for the design of SiC gate driver in terms of speed and dv/dt immunity, a sub-nanosecond delay level shifter based on a high-voltage (HV) digital level shifter circuit is proposed. It can decrease the response time compared with the existing level-shifting circuitry, enabling its application in high-voltage scenarios such as closed-loop drive circuits for silicon carbide. The edge detection circuit and simple pull-up branches are utilized to reduce the transmission delay and power consumption. The circuit is simulated at a frequency of 10MHz in a 018um BCD process with Virtuoso, and the results demonstrate that the average transmission delay is about 380ps and the charging response time of the slow path is reduced to 3.3ns. © 2024 IEEE.

关键词： Delay circuits

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Speech Quality Assessment and Emotions - Effect on the PESQ Metric 15

Speech Quality Assessment and Emotions - Effect on the PESQ ...

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15th International Conference Elektro, ELEKTRO 2024

作者： Zgank, Andrej Donaj, Gregor Vlaj, Damjan University of Maribor Faculty of Electrical Engineering and Computer Science Maribor Slovenia

ISBN: (纸本)9798350372359

This paper analyzes how emotional speech influ-ences the quality assessment process. The objective metrics for speech quality assessment are usually evaluated with neutral speech recordings, but human interaction frequently involves emotions. Those can modify speech signals' acoustic and phonetic characteristics largely, which are essential from the objective speech quality assessment perspective. The proposed analysis was carried out with the English and Slovenian Interface emotional speech database, which includes two neutral and six emotional speaking styles. Speex codec was used to simulate the degradations, which were then assessed with the lTV - T P.862 PESQ objective metric. The results' analysis showed that in both languages surprise, in English fear, and in Slovenian disgust influenc the speech quality assessment significantly. © 2024 IEEE.

关键词： Quality control

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An Efficient Federated Learning Framework for IoT Intrusion Detection 100

An Efficient Federated Learning Framework for IoT Intrusion ...

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100th IEEE Vehicular Technology Conference, VTC 2024-Fall

作者： Chen, Yushen Fang, Fang Wang, Boyu Zhang, Lan Western University Department of Computer Science London Canada Western University Department of Electrical and Computer Engineering London Canada Clemson University Department of Electrical and Computer Engineering Clemson United States

ISBN: (纸本)9798331517786

The exponential growth of the Internet of Things (IoT) ecosystems has raised significant cybersecurity concerns. Deep learning (DL)-based methods have shown promising performance in detecting potential cyber threats in IoT networks. However, as these methods often involve data centralization, they can pose serious data privacy issues for IoT users and increase the communication burden of local networks. Federated learning (FL), as a distributed learning paradigm, enables privacy-preserving training of IoT intrusion detection models by requiring only model updates from IoT devices. However, the resource-constrained nature of IoT devices can significantly decrease FL training efficiencies, such as increased training latency and delayed convergence speed. Moreover, the data heterogeneous issues of IoT devices can also impact the accuracy and robustness of the trained model. To address these challenges, we propose an efficient FL framework, FedKD-Prox, based on federated proximal (FedProx) and knowledge distillation (KD). To improve the prediction accuracy within a limited time budget, the proposed framework aims to efficiently exploit the computation capability of the IoT trainers, reduce the communication overhead of FL, and alleviate the impact of heterogeneous data issues. The simulation results show that FedKD-Prox achieves higher accuracy and improves the robustness of the trained intrusion detection model. © 2024 IEEE.

关键词： Federated learning

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Automatic Waterfowl and Habitat Detection using Drone Imagery and Deep Learning

Automatic Waterfowl and Habitat Detection using Drone Imager...

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2024 IEEE International Conference on Consumer Electronics, ICCE 2024

作者： Zhao, Andrew Fratila, Andrea Zhang, Yang Zhai, Zhenduo Liu, Zhiguang Shang, Yi University of Illinois Computer Science Department United States University of Missouri Department of Electrical Engineering and Computer Science United States

ISBN: (纸本)9798350324136

The integration of drone technology and Artificial Intelligence (AI) has opened up new possibilities for wildlife conservation and habitat monitoring. In this paper, we present a new system for efficiently and accurately analyzing waterfowl populations and classifying their habitats over large natural areas using drone imagery and deep learning (DL). Given a sequence of drone images captured by a drone along a flight path, the system utilizes customized deep learning models for waterfowl detection and counting, Meta's SAM for image segmentation and customized deep learning models for segment classification, and ChatGPT to generate text-based survey reports. Several image overlap detection methods were developed and compared with. Our experimental results show accurate waterfowl and habitat detection results and improvement over previous work, providing efficient and accurate data analysis for wildlife conservation efforts. © 2024 IEEE.

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Time-delay Correction Control Strategy for HVDC Frequency Regulation Services

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CSEE Journal of Power and Energy Systems 2024年第5期10卷 2027-2037页

作者： Yuqing Dong Kaiqi Sun Jinning Wang Shunliang Wang He Huang Tianqi Liu Yilu Liu School of Electrical Engineering Shandong UniversityJinan 250061China School of Electrical Engineering Shandong UniversityJinan 250061China. Department of Electrical Engineering and Computer Science University of TennesseeKnoxville 37996USA.

With the advancements in voltage source converter(VSC)technology,VSC based high voltage direct current(VSCHVDC)systems provide system operators with a prospective approach to enhance system operating stability and *** addition to long-distance transmission,the VSC-HVDC system can also provide multiple ancillary services,such as frequency regulation,due to its power ***,if a time delay exists in the control signal,the VSC-HVDC system may bring destabilizing influences to the system,which will decrease the system resilience under the *** order to reduce control deviation caused by time delay,in this paper,a small signal model is first conducted to analyze the impact of time delay on system *** a time-delay correction control strategy for HVDC frequency regulation control is developed to reduce the influence of the time *** control performance of the proposed time-delay correction control is verified both in the established small signal model and the runtime simulation in a modified IEEE 39 bus *** results indicate that the proposed time-delay correction control strategy shows significant improvement in system stability.

关键词： Frequency regulation control HVDC small signal analysis time delay time-delay correction control strategy

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