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Microwave, MTT-S International Symposium

作者： S. Koziel J.W. Bandler A.S. Mohamed K. Madsen Simulation Optimization Systems Research Laboratory Department of Electrical and Computer Engineering McMaster University Hamilton ONT Canada McMaster University Hamilton ONT Canada Informatics and Mathematical Modelling Technical University of Denmark Denmark

We present advances in microwave and RF device modeling exploiting space mapping (SM) technology. We propose new SM modeling formulations utilizing input mappings, output mappings, frequency scaling and quadratic approximations. Our aim is to enhance circuit models for statistical analysis and yield-driven design. We illustrate our results using a capacitively-loaded two-section impedance transformer, a single-resonator waveguide filter and a six-section H-plane waveguide filter.

关键词： Space technology Samarium Electromagnetic waveguides Statistical analysis Microwave filters Circuit simulation Microwave devices Radio frequency Microwave technology Impedance

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Video supported bilateral teleoperation system: Design and implementation

Video supported bilateral teleoperation system: Design and i...

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International Symposium on Computational Intelligence and informatics

作者： Hunor Sándor Tamás Szabó Tamás Vajda Piroska Haller Zoltán Szántó Lőrinc Márton Department of Electrical Engineering Sapientia Hungarian University of Transylvania Mures Romania Department of Informatics ‘Petru Maior’ University Mures Romania Department of Computer Science Technical University of Cluj Napoca Cluj Napoca Romania

In bilateral teleoperation systems, beside the haptic feedback, the human operator also needs video information about the motion of the distantly controlled robot to complete the teleoperation task. In this study a software design approach is presented for such bilateral teleoperation systems that include one or more video channels. A control algorithm is also presented that regulates the traffic in the video channels in order to assure good communication properties for the communication channels over which the control signals are interchanged by the master and slave side of the teleoperation system. Solutions are also given for the implementation of such teleoperation systems. Experimental measurements are presented to validate the proposed communication and software design approach.

关键词： Haptic interfaces Robot sensing systems Delays Streaming media Communication channels Force

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Donor Selection for Hematopoietic Stem Cell Transplant Using Cost-Sensitive SVM

Donor Selection for Hematopoietic Stem Cell Transplant Using...

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International Conference on Machine Learning and Applications (ICMLA)

作者： Adarsh Sivasankaran Vladimir Cherkassky Mark Albrecht Eric Williams Martin Maiers Biomedical Informatics and Computational Biology Department of Electrical and Computer Engineering University of Minnesota Minneapolis Minnesota U.S.A. Bioinformatics Research National Marrow Donor Program Minneapolis Minnesota U.S.A.

ISBN: (纸本)9781509002887

Donor selection for Hematopoietic Stem Cell Transplant often requires physicians to manually select 3 to 5 donors from a list of 100s of genetically compatible donors as identified by HLA-based matching algorithms. The decision process is complicated by a lack of strict guidelines governing a "secondary" selection process, which is based upon non-HLA donor attributes. Our research is aimed at modeling this "secondary" decision process which can help physicians choose the right donors, based on donor attributes and historical choice behavior. Proposed black box models will help in improving selection consistency.

关键词： Medical services Support vector machines Data models Stem cells Mathematical model Numerical models Training

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The influence of MIMO terminal user's hand on channel capacity

The influence of MIMO terminal user's hand on channel capaci...

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European Conference on Antennas and Propagation, EuCAP

作者： T. Zervos A. Alexandridis K. Peppas F. Lazarakis K. Dangakis C. Soras B. Lindmark Department of Electrical & Computer Engineering University of Patras Patras Greece Institute of Informatics & Telecommunications National Centre for Scientific Research Athens Greece Department of Signals Sensors and Systems Royal Institute of Technology Stockholm Sweden

In this paper the impact of user's hand holding a multiple-input-multiple-output (MIMO) terminal on the system performance is investigated. A 4times4 MIMO system is considered with a personal digital assistant (PDA) terminal equipped with a compact array of 4 patch elements. The radiation patterns of the antenna elements are simulated in the presence of the other elements and in the presence of a user's hand. The obtained patterns are used to evaluate the covariance matrix of the receive antenna which is incorporated in a correlation-based MIMO channel model. MIMO channel capacity is calculated to demonstrate the capacity degradation caused by the user's hand.

关键词： MIMO Channel capacity Personal digital assistants Antenna radiation patterns Mobile antennas System performance Impedance Biological tissues Humans Frequency

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Full Duplex Holographic MIMO for Near-Field Integrated Sensing and Communications

arXiv

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arXiv 2023年

作者： Gavras, Ioannis Islam, Md Atiqul Smida, Besma Alexandropoulos, George C. Department of Informatics and Telecommunications National and Kapodistrian University of Athens Greece Qualcomm Technologies Inc. Santa ClaraCA United States Department of Electrical and Computer Engineering University of Illinois Chicago United States

This paper presents an in-band Full Duplex (FD) integrated sensing and communications system comprising a holographic Multiple-Input Multiple-Output (MIMO) base station, which is capable to simultaneously communicate with multiple users in the downlink direction, while sensing targets being randomly distributed within its coverage area. Considering near-field wireless operation at THz frequencies, the FD node adopts dynamic metasurface antenna panels for both transmission and reception, which consist of massive numbers of sub-wavelength-spaced metamaterials, enabling reduced cost and power consumption analog precoding and combining. We devise an optimization framework for the FD node’s reconfigurable parameters with the dual objective of maximizing the targets’ parameters estimation accuracy and the downlink communication performance. Our simulation results verify the integrated sensing and communications capability of the proposed FD holographic MIMO system, showcasing the interplays among its various design parameters. © 2023, CC BY-NC-ND.

关键词： MIMO systems

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Unsupervised Foggy Scene Understanding via Self Spatial-Temporal Label Diffusion

arXiv

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arXiv 2022年

作者： Liao, Liang Chen, Wenyi Xiao, Jing Wang, Zheng Lin, Chia-Wen Satoh, Shin'ichi The Digital Content and Media Sciences Research Division National Institute of Informatics Tokyo101-8430 Japan The School of Computer Science Wuhan University Wuhan430072 China The Department of Electrical Engineering The Institute of Communications Engineering National Tsing Hua University Hsinchu30013 Taiwan

Understanding foggy image sequence in driving scene is critical for autonomous driving, but it remains a challenging task due to the difficulty in collecting and annotating real-world images of adverse weather. Recently, self-training strategy has been considered as a powerful solution for unsupervised domain adaptation, which iteratively adapts the model from the source domain to the target domain by generating target pseudo labels and re-training the model. However, the selection of confident pseudo labels inevitably suffers from the conflict between sparsity and accuracy, both of which will lead to suboptimal models. To tackle this problem, we exploit the characteristics of the foggy image sequence of driving scenes to densify the confident pseudo labels. Specifically, based on the two discoveries of local spatial similarity and adjacent temporal correspondence of the sequential image data, we propose a novel Target-Domain driven pseudo label Diffusion (TDo-Dif) scheme. It employs superpixels and optical flows to identify the spatial similarity and temporal correspondence, respectively, and then diffuses the confident but sparse pseudo labels within a superpixel or a temporal corresponding pair linked by the flow. Moreover, to ensure the feature similarity of the diffused pixels, we introduce local spatial similarity loss and temporal contrastive loss in the model re-training stage. Experimental results show that our TDo-Dif scheme helps the adaptive model achieve 51.92% and 53.84% mean intersection-over-union (mIoU) on two publicly available natural foggy datasets (Foggy Zurich and Foggy Driving), which exceeds the state-of-the-art unsupervised domain adaptive semantic segmentation methods. The proposed method can also be applied to non-sequential images in the target domain by considering only spatial similarity. Models and data can be found at https://***/velor2012/TDo-Dif. Copyright © 2022, The Authors. All rights reserved.

关键词： Diffusion

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Sub-Goal Social Force Model for Collective Pedestrian Motion Under Vehicle Influence

arXiv

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arXiv 2021年

作者： Yang, Dongfang Johora, Fatema T. Redmill, Keith A. Özgüner, Ümit Müller, Jörg P. Department of Electrical and Computer Engineering The Ohio State University ColumbusOH43212 United States Department of Informatics Clausthal University of Technology Julius-Albert-Str. 4 Clausthal-Zellerfeld38678 Germany

—In mixed traffic scenarios, a certain number of pedestrians might coexist in a small area while interacting with vehicles. In this situation, every pedestrian must simultaneously react to the surrounding pedestrians and vehicles. Analytical modeling of such collective pedestrian motion can benefit intelligent transportation practices like shared space design and urban autonomous driving. This work proposed the sub-goal social force model (SG-SFM) to describe the collective pedestrian motion under vehicle influence. The proposed model introduced a new design of vehicle influence on pedestrian motion, which was smoothly combined with the influence of surrounding pedestrians using the sub-goal concept. This model aims to describe generalized pedestrian motion, i.e., it is applicable to various vehicle-pedestrian interaction patterns. The generalization was verified by both quantitative and qualitative evaluation. The quantitative evaluation was conducted to reproduce pedestrian motion in three different datasets, HBS, CITR, and DUT. It also compared two different ways of calibrating the model parameters. The qualitative evaluation examined the simulation of collective pedestrian motion in a series of fundamental vehicle-pedestrian interaction scenarios. The above evaluation results demonstrated the effectiveness of the proposed model. Copyright © 2021, The Authors. All rights reserved.

关键词： Vehicles

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Modified Bow-Tie Antenna Design Using Artificial Hummingbird Algorithm for Wireless Power Transfer IoT Applications

Modified Bow-Tie Antenna Design Using Artificial Hummingbird...

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European Conference on Antennas and Propagation, EuCAP

作者： Achilles D. Boursianis Maria S. Papadopoulou Aikaterini I. Griva Vasileios P. Rekkas Lazaros A. Iliadis Sotirios P. Sotiroudis Panagiotis Diamantoulakis Thomas Lagkas Panagiotis Sarigiannidis Sotirios K. Goudos Christos Christodoulou George K. Karagiannidis ELEDIA@AUTH School of Physics Aristotle University of Thessaloniki Thessaloniki Greece ELEDIA@AUTH Department of Information and Electronic Engineering International Hellenic University Sindos Greece Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki Greece Department of Computer Science International Hellenic University Kavala Greece Department of Informatics and Telecommunications Engineering University of Western Macedonia Kozani Greece Department of Engineering and Computing The University of New Mexico USA

The advent of the Internet of Things has allowed the re-usability of established techniques combined with emerging technologies. In the TERMINET project, several key-enabling technologies in an IoT ecosystem are explored. The smart farming paradigm is one of the realistic use cases of the project, in which Wireless Power Transfer, assisted by an Unmanned Aerial Vehicle, will be demonstrated as a proof-of-concept, to deliver energy in wireless sensor networks. In this work, we provide a feasible solution of a rectifying antenna module in a rectenna system, which operates in the Wi-Fi 2.4 GHz frequency band. The proposed antenna is optimized by utilizing the Artificial Hummingbird Algorithm. Numerical results demonstrate excellent performance of the proposed antenna, in terms of the key characteristics of reflection coefficient, input impedance, realized gain, and efficiency.

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Performance Improvements of Vehicular PKI Protocol for the Security of V2X Communications

Performance Improvements of Vehicular PKI Protocol for the S...

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International Conference on Telecommunications and Signal Processing (TSP)

作者： Hassan Farran David Khoury Department of Networked Systems and Services Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Budapest Hungary Department of Computer Science and Information and Communication Technology American University of Science and Technology Beirut Lebanon

Vehicle-to-Everything (V2X) technology allows vehicles to communicate with numerous transportation system components. To provide safe communication between vehicles and other entities, V2X depends on Public Key Infrastructure (PKI). However, the present PKI employed in V2X has certain drawbacks, including scalability and high computational cost. This article offers an enhancement to the current PKI in V2X that tackles these constraints by managing and distributing keys using blockchain technology. The suggested Public Key Infrastructure enhancement is intended to be secure, efficient, and scalable, providing a more solid and trustworthy foundation for V2Xcommunication. The article explains the suggested PKI enhancement and examines its advantages and disadvantages. Overall, the suggested Public Key Infrastructure enhancement has the potential to increase the security and dependability of Vehicle-to-Everything communication, allowing for a secure and more effective transportation system.

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Integrated Learning in electrical and Control engineering Using an Educational Elevator System

Integrated Learning in Electrical and Control Engineering Us...

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International Conference and Exposition on electrical and Power engineering (EPE)

作者： Dorin-Dumitru Lucache Georgel Gabor Constantin-Cătălin Dosoftei Faculty of Electrical Eng. Energy and Applied Informatics “Gheorghe Asachi” Technical University of Iasi Iasi Romania Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iasi Iasi Romania

ISBN: (数字)9781728181264

ISBN: (纸本)9781728181271

The research of the authors is focused on presenting a practical multidisciplinary experiment - an elevator simulator to relate theory and practice inside of a lot of disciplines and to bring the “real world” into a useful case study for electrical and control engineering education. Through the existence of interesting experiments, students gain motivation either to continue thinking and improving new solutions for building and control of elevators. The concept of the modern elevator is presented in this paper from the perspective of integration of current technological equipment like a programmable logic controller, inverter, encoder, human-machine-interface on which students can develop various control strategies using a SCADA system. The paper presents the some exercises that students can perform on the existent simulator.

关键词： Elevators Registers Induction motors Software Coils Traction motors Inverters

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