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2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021

作者： Mishra, Vigyanshu Kiourti, Asimina ElectroScience Laboratory Ohio State University Dept. of Electrical and Computer Engineering ColumbusOH United States

ISBN: (纸本)9781728146706

We recently reported a new class of wearable wireless body area networks (WBANs) based on planar magnetoinductive waveguides (MIWs) that offer extremely low-loss as compared to the state-of-the-art. Examining the bending effects of these WBANs around anatomical curvatures of the human body becomes crucial for their practical implementation. Previous work utilized mostly flat surfaces to evaluate performance of planar-MIW WBANs with only few quantitative data reported for bending scenarios around curved surfaces. In this paper, we provide the complete transmission performance characteristics of these WBANS over the entire frequency band (30-60 MHz) pertinent to several bending scenarios that were not reported in the past. Results demonstrate excellent overlap of transmission characteristics across the operating band with minimal change in performance across various bending scenarios, including extreme bending. Overall, the study confirms the potential of planar-MIWs to connect across various anatomical curvatures and to ultimately form a robust and reliable alternative for future wearable WBANs. © 2021 IEEE.

关键词： Wireless local area networks (WLAN)

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Wearable Magnetoinductive Waveguide WBANs: Tolerance to Loop Failures

Wearable Magnetoinductive Waveguide WBANs: Tolerance to Loop...

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2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021

作者： Mishra, Vigyanshu Kiourti, Asimina Ohio State University ElectroScience Laboratory Dept. of Electrical and Computer Engineering ColumbusOH United States

ISBN: (纸本)9781728146706

We recently reported a new class of wearable wireless body area networks (WBANs) that are based on magnetoinductive waveguides (MIWs) to offer extremely low loss as compared to the state-of-the-art. These WBANs consist of a series of resonant loops placed in either axial or planar configuration upon the human body. Contrary to other continuous connecting structures for WBANs that fail in case of any break, these MIW WBANs are tolerant to any break/loop failure. In this paper, we provide quantitative results to demonstrate the above and we assess the effect of loop failures on performance (loss, bandwidth, and cut-off frequencies). Two loop densities (11- and 15-loop for a distance of 41 cm between transmitter and receiver) are evaluated for both axial and planar designs. We show that axial designs are more tolerant than planar designs, with both designs remaining operational in the event of loop failure. © 2021 IEEE.

关键词： Wireless local area networks (WLAN)

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Enhancing 3D Modeling Quality Through Orthorectified Image Accumulation

Enhancing 3D Modeling Quality Through Orthorectified Image A...

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International Conference on Electronics, Information and Communications (ICEIC)

作者： Cheolsu Kwag Euntaek Kim Yongsuk Lee Seungmin Jung Sung Soo Hwang Hwangryol Ryu Youngmin Moon Dept. of Computer Science and Electrical Engineering Handong Global University Pohang Republic of Korea School of Computer Science and Electrical Engineering Handong Global University Pohang Republic of Korea Smart Engineering Research Laboratory Research Institute of Industrial Science & Technology Pohang Republic of Korea

ISBN: (数字)9798331510756

ISBN: (纸本)9798331510763

This study introduces a novel methodology designed to facilitate the capture of comprehensive image datasets, crucial for accurate 3D modeling of expansive indoor spaces. Leveraging orthophotos generated from panoramic camera data and visualizing image coverage density through heatmaps, our approach effectively identifies under-captured and unvisited areas. This enables targeted image acquisition, minimizes redundant reshoots, and enhances the overall quality and fidelity of 3D models.

关键词： Heating systems Solid modeling Three-dimensional displays Accuracy Data visualization Minimization Cameras

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Comparison of Partial Discharge signal in a Three phase Transformer by UHF, TEV and HFCT sensors 1

Comparison of Partial Discharge signal in a Three phase Tran...

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1st IEEE International Conference on Power Electronics and Energy, ICPEE 2021

作者： Subramaniam, Aravinth Raman, Santosh Janaki Panda, Sanjib Kumar Sembcorp-NUS Corporate Laboratory National University of Singapore Dept. of Electrical and Computer Engineering Singapore Singapore

ISBN: (纸本)9781728187730

Externally produced PD signal is electromagnetically linked with a 3-phase transformer to understand its propagation nature within the transformer windings. Transformer with and without load coupled with this externally generated PD is monitored by Ultra High Frequency (UHF), Transient Earth Voltage (TEV) and High Frequency Current Transformer (HFCT) sensors to compare their performance. PRPD method has also been used to differentiate the discharge magnitude with respect to their phasor positions. Not all the sensors are found to be equally good to identifying the PD pulse magnitude and their phasor positions from their respective principle and geometric locations. © 2021 IEEE.

关键词： Partial discharges

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Wearable Radio Frequency Loop Sensors for Monitoring Joint Kinematics 34

Wearable Radio Frequency Loop Sensors for Monitoring Joint K...

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34th General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2021

作者： Mishra, Vigyanshu Kiourti, Asimina The Ohio State University ElectroScience Laboratory Dept. of Electrical and Computer Engineering ColumbusOH United States

ISBN: (纸本)9789463968027

We report an emerging wearable sensor technology that relies on radio frequency (RF) loops to enable seamless monitoring of human body kinematics in uncontrived settings. Two variants of this technology are discussed that consist of loops placed transversally and longitudinally upon the limbs to monitor flexion-only and combined flexion and rotation, respectively. The reported approach overcomes shortcomings in state-of-the-art motion capture, offering unprecedented opportunities for the future of healthcare, sports, gaming, and more. © 2021 URSI.

关键词： Wearable sensors

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Wearables for Joint Effusion Detection: An Analysis for Magnitude-/Phase-Only vs. Combined Readings

Wearables for Joint Effusion Detection: An Analysis for Magn...

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2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021

作者： Jenkins, Connor Mishra, Vigyanshu Kiourti, Asimina ElectroScience Laboratory Ohio State University Dept. of Electrical and Computer Engineering ColumbusOH United States

ISBN: (纸本)9781728146706

Detecting and diagnosing joint effusion is a costly and often invasive process. Our previous work introduced a seamless wearable system consisting of transmit and receive loops that was able to detect changes in synovial fluid build-up via transmission coefficient (S_21) measurements. The system relied on magnitude and phase measurements conducted each at different frequencies. This work simplifies the previous design by enabling monitoring of both magnitude and phase at a single frequency. Another improvement is the elimination of any lumped elements attached to the loops to ease the wearable implementation. Our studies provide an optimal design at 1485.2 MHz that is robust to frequency fluctuations within a bandwidth of 30 MHz. Key performance metrics are identified and compared for magnitude-Iphase-only designs vs. the proposed combined approach. © 2021 IEEE.

关键词： Phase measurement

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Channel Selection of Hybrid Communication Systems using Machine Learning

Channel Selection of Hybrid Communication Systems using Mach...

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2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022

作者： Smith, Julie C. Christodoulou, Christos G. The University of New Mexico The Dept. of Electrical & Computer Engineering AlbuquerqueNM United States Kirtland AFB Air Force Research Laboratory Space Vehicles AlbuquerqueNM United States

ISBN: (数字)9781665496582

ISBN: (纸本)9781665496582

Commercial and military free space communication needs are growing at a remarkable pace. The requirements for free space data transfer have increased as the technology increased, and now engineers are considering higher frequency bands for free space, including W/V, millimeter wave and optical bands. Laser communications can offer much higher data rates than traditional radio frequency (RF) systems and have the added advantage of not being regulated by the International Telecommunication Union (ITU). This along with typical hardware being much smaller in size, weight and power (SWaP) make optical communications a desirable solution for high-rate communication systems. W/V band systems also have the advantage of higher data rates and less frequency congestion than traditional RF systems, as well as the advantages of being able to link through clouds. As the need for "data on demand"increases, the likelihood of users moving to hybrid systems is very high. Today, multiple users in both commercial and government sectors are looking to integrate both laser communication (lasercom) and RF solutions onto their platforms. The goal of this work is to use machine learning on a hybrid communication system, to determine which system will give the highest performance for a given satellite mission. © 2022 IEEE.

关键词： Machine learning

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High operating temperature plasmonic detectors

High operating temperature plasmonic detectors

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CLEO: Science and Innovations, S and I 2022

作者： Nordin, L. Muhowski, A.J. Wasserman, D. Geballe Laboratory for Advanced Materials Stanford University StanfordCA94305 United States Dept. of Electrical and Computer Engineering University of Texas at Austin AustinTX78758 United States

We demonstrate high operating temperature plasmonic infrared detectors, with sub-diffractive absorber thicknesses. Our detectors operate at 230 K with substantially better performance than commercial detectors at the ... 详细信息

ISBN: (数字)9781957171050

ISBN: (纸本)9781557528209

关键词： Temperature

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Power Sharing-Based Framework for Allocating Automatic Generation Control in Distributed Energy Resources

Power Sharing-Based Framework for Allocating Automatic Gener...

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IEEE PES Transmission and Distribution Conference and Exposition

作者： Ahmad Ali Hantao Cui Wenbo Wang Xin Fang School of Electrical & Computer Engineering Oklahoma State University Stillwater OK USA National Renewable Energy Laboratory Energy System Integration Golden CO USA Dept. of Electrical & Computer Engineering Mississippi State University Starkville MS USA

ISBN: (数字)9798350316377

ISBN: (纸本)9798350316384

The recent proliferation of distributed energy resources (DERs) in the power network along with the retirement of conventional generators has made it challenging to regulate system frequency. This paper presents a centralized control framework to leverage the potential of DERs in the distribution network to provide secondary frequency control services to the grid. The proposed framework is based on network volt-watt sensitivity analysis and takes into account DER operational and network-imposed constraints to allocate the automatic generation control (AGC) request among the aggregated units. The proposed framework was implemented on the IEEE 8,500-node test feeder and the results were validated against a standard linear programming-based scheme. Numerical results indicate that the proposed framework can successfully utilize the available power production headroom of the network to meet the AGC request while maintaining nodal voltages within acceptable limits.

关键词： Time-frequency analysis Sensitivity analysis Automatic generation control Distributed power generation Computational efficiency Voltage control Standards

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Securing Mobile Robotic Networks Against Replacement Attack

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IEEE Transactions on Automatic Control 2025年

作者： Li, Yushan He, Jianping Chen, Cailian Guan, Xinping Cai, Lin Shanghai Jiao Tong University Dept. of Automation China Ministry of Education of China The Key Laboratory of System Control and Information Processing China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai200240 China University of Victoria Dept. of Electrical and Computer Engineering BC Canada

The security of mobile robotic networks (MRNs) has been an active research topic in recent years. This paper aims to secure the ubiquitous formation control of MRNs against the replacement attack, where an external robot can replace a formation robot by compromising the communication and physically interfering with the victim simultaneously. To counter this advanced attack, the novel idea of this work is to leverage the physical proximity of the formation shape and the interaction topology among robots for defense design. First, from the physical proximity perspective, we propose the convex neighbor polygon (CNP) to capture the geometric characteristic of the formation robots, and design a CNP-based security mechanism for the robots during the replacement attack. Then, from the interaction perspective, we introduce the indirect controllability to characterize the possibility that the attacker leverages the interaction between robots to deactivate the CNP mechanism, and establish the conditions regarding the topology structure and the attack input to counter the replacement. Finally, based on the obtained conditions, we demonstrate how to design the initiatory topology among the formation robots to enhance the defense performance. Comparative simulations verify the effectiveness of the proposed method. © 1963-2012 IEEE.

关键词： Topology

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