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Antennas and Propagation Society International Symposium

作者： H. Tanidokoro N. Konishi E. Hirose Y. Shinohara H. Arai N. Goto Microelectronics Research Laboratory Central Research Institute Mitsubishi Material Corporation Chichibu Saitama Japan Diviaion of Electrical and Computer Engineering Faculty fo Engineering Yokohama National University Yokohama Kanagawa Japan Department of Electronics and Systems. Faculty of Engineering Takushoku University Hachioji Tokyo Japan

We propose a 1-wavelength loop type dielectric chip antenna that meets the demand for antennas with unidirectional radiation patterns for portable communication devices. The structure of the proposed antenna is shown. The radiating element printed loop is on the top of the cube. A feeding strip line is on one of the vertical face of the cube and a shorted plate parallel to the feeding strip line is on the same face. The conductive plane is on the bottom of the cube. By printing all of conductive elements on a ceramic cube this novel antenna is easy to fabricate.

关键词： Ceramics Finite difference methods Time domain analysis Dielectric loss measurement Directive antennas Antenna radiation patterns Conductors Permittivity Thick films Antenna measurements

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PAM-4 optical transmission beyond 224 Gbps based on an ultrahigh-bandwidth slow-light silicon modulator

PAM-4 optical transmission beyond 224 Gbps based on an ultra...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Han, Changhao Qin, Jun Yang, Qipeng Zheng, Zhao Shu, Haowen Zhang, Yunhao Wu, Yichen Sun, Yu Lu, Junde Zhou, Yan Ge, Zhangfeng Wang, Lei He, Zhixue Yu, Shaohua Hu, Weiwei Peng, Chao Bowers, John E. Wang, Xingjun State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Department of Electrical and Computer Engineering University of California Santa BarbaraCA93106 United States Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University Beijing100192 China Frontiers Science Center for Nano-Optoelectronics Peking University Beijing100871 China Peng Cheng Laboratory Shenzhen518055 China Peking University Yangtze Delta Institute of Optoelectronics Nantong226010 China

We experimentally demonstrate PAM-4 optical transmission beyond 224 Gbps based on an ultrahigh-bandwidth slow-light silicon modulator in C-band with the combination of the artificial neural network equalizers. CLEO 20... 详细信息

ISBN: (纸本)9781957171395

关键词： Silicon photonics

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Block-Wise Index Modulation and Receiver Design for High-Mobility OTFS Communications

arXiv

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arXiv 2023年

作者： Qian, Mi Ji, Fei Ge, Yao Wen, Miaowen Cheng, Xiang Poor, H. Vincent The School of Electronic and Information Engineering South China University of Technology Guangzhou510641 China The Continental-NTU Corporate Lab Nanyang Technological University Singapore The State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics School of Electronics Engineering and Computer Science Peking University Beijing100871 China The Department of Electrical and Computer Engineering Princeton University PrincetonNJ08544 United States

As a promising technique for high-mobility wireless communications, orthogonal time frequency space (OTFS) has been proved to enjoy excellent advantages with respect to traditional orthogonal frequency division multiplexing (OFDM). Although multiple studies have considered index modulation (IM) based OTFS (IM-OTFS) schemes to further improve system performance, a challenging and open problem is the development of effective IM schemes and efficient receivers for practical OTFS systems that must operate in the presence of channel delays and Doppler shifts. In this paper, we propose two novel block-wise IM schemes for OTFS systems, named delay-IM with OTFS (DeIM-OTFS) and Doppler-IM with OTFS (DoIM-OTFS), where a block of delay/Doppler resource bins are activated simultaneously. Based on a maximum likelihood (ML) detector, we analyze upper bounds on the average bit error rates for the proposed DeIM-OTFS and DoIM-OTFS schemes, and verify their performance advantages over the existing IM-OTFS systems. We also develop a multi-layer joint symbol and activation pattern detection (MLJSAPD) algorithm and a customized message passing detection (CMPD) algorithm for our proposed DeIM-OTFS and DoIM-OTFS systems with low complexity. Simulation results demonstrate that our proposed MLJSAPD and CMPD algorithms can achieve desired performance with robustness to the imperfect channel state information (CSI). © 2023, CC BY.

关键词： Message passing

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Development of a 1 MHz MOSFET gate-driver for integrated converters

Development of a 1 MHz MOSFET gate-driver for integrated con...

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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： M.A. de Rooij J.T. Strydom J.D. van Wyk P. Beamer Electronic Power Conversion Laboratory General Electric Global Research Schenectady NY USA The Bradley Department of Electrical and Computer Engineering Center for Power Electronic Systems (NSF-CPES) National Science Foundation Engineering Research-Virginia Polytechnic and State University Blacksburg VA USA

A gate-driver capable of switching a MOSFET at 1 MHz is proposed. The main design issues such as propagation delay and pulse width distortion have been addressed. Particular attention has been given to miniaturization of the unit with the aim of integration into an integrated power converter. The design has also focused on extensive protection features for the MOSFET, such as over-current and thermal shutdown. An experimental prototype, which can switch MOSFETs up to 800 V, has been constructed and the results presented.

关键词： MOSFET circuits Protection Switches Power MOSFET Pulse modulation Pulse transformers Rectifiers Topology Voltage Signal design

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Multi-view hybrid embedding: A divide-and-conquer approach

arXiv

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arXiv 2018年

作者： Xu, Jiamiao Yu, Shujian You, Xinge Leng, Mengjun Jing, Xiao-Yuan Chen, C. L. Philip School of Electronic Information and Communications Huazhong University of Science and Technology Wuhan430074 China Department of Electrical and Computer Engineering University of Florida GainesvilleFL32611 United States Department of Computer Science University of Houston HoustonTX77204 United States State Key Laboratory of Software Engineering School of Computer Wuhan University China Department of Computer and Information Science Faculty of Science and Technology University of Macau Macau99999 China Dalian Maritime University Dalian116026 China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing100080 China

We present a novel cross-view classification algorithm where the gallery and probe data come from different views. A popular approach to tackle this problem is the multiview subspace learning (MvSL) that aims to learn a latent subspace shared by multi-view data. Despite promising results obtained on some applications, the performance of existing methods deteriorates dramatically when the multi-view data is sampled from nonlinear manifolds or suffers from heavy outliers. To circumvent this drawback, motivated by the Divideand-Conquer strategy, we propose Multi-view Hybrid Embedding (MvHE), a unique method of dividing the problem of cross-view classification into three subproblems and building one model for each subproblem. Specifically, the first model is designed to remove view discrepancy, whereas the second and third models attempt to discover the intrinsic nonlinear structure and to increase discriminability in intra-view and interview samples respectively. The kernel extension is conducted to further boost the representation power of MvHE. Extensive experiments are conducted on four benchmark datasets. Our methods demonstrate overwhelming advantages against the stateof-the-art MvSL based cross-view classification approaches in terms of classification accuracy and robustness. Copyright © 2018, The Authors. All rights reserved.

关键词： Embeddings

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Editorial: Dependability and security

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IEEE Transactions on Dependable and Secure Computing 2008年第1期5卷 1-3页

作者： Iyer, Ravishankar K. Gligor, Virgil D. Kalbarczyk, Zbigniew T. Kanoun, Karama Katzenbeisser, Stefan Mukherjee, Shubu Shieh, Shiuhpyng Zorian, Yervant Department of Electrical and Computer Engineering Carnegie Mellon University Microsoft's Trusted Computing Academic Advisory Board Center for Reliable and High-Performance Computing Coordinated Science Laboratory University of Illinois Urbana-Champaign United States IEEE IEEE Computer Society LAAS CNRS IFIP Working Group 10.4 on Dependable Computing and Fault Tolerance Special Interest Group on Dependability Benchmarking IFIP Working Group 10.4 French SEE Technical Committee on Trustworthy Computer Systems SEE Working Group Design and Validation for Dependability Technical University Munich Germany Darmstadt University of Technology ACM IACR Intel's SER Tech Council Intel's Architecture Patent Committee Taiwan Information Security Center NCTU IEEE Reliability Society Taipei and Tainan IACR United States Virage Logic Corp. AT and T Bell Laboratories Logic Vision Inc. University of British Columbia IEEE Test Technology Technical Council

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A Three-Phase High Frequency Semi-controlled Battery Charging Power Converter for Plug-in Hybrid Electric Vehicles

A Three-Phase High Frequency Semi-controlled Battery Chargin...

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2011 IEEE Energy Conversion Congress and Exposition (ECCE 2011)

作者： Mahmoud M. Amin Osama A. Mohammed Energy systems Research Laboratory Department of Electrical and Computer Engineering Florida International University Miami Florida USA

ISBN: (纸本)9781457705427;9781457705410

This paper presents a novel analysis, design, and implementation of a battery charging three-phase high frequency semi-controlled power converter feasible for plug-in hybrid electric vehicles. The main advantages of the proposed topology include high efficiency;due to lower power losses and reduced number of switching elements, high output power density realization, and reduced passive component ratings proportionally to the frequency. Additional advantages also include grid economic utilization by insuring unity power factor operation under different possible conditions and robustness since short-circuit through a leg is not possible. A high but acceptable total harmonic distortion of the generator currents is introduced in the proposed topology which can be viewed as a minor disadvantage when compared to traditional boost rectifiers. A hysteresis control algorithm is proposed to achieve lower current harmonic distortion for the rectifier operation. The rectifier topology concept, the principle of operation, and control scheme are presented. Additionally, a dc-dc converter is also employed in the rectifier-battery connection. Test results on 50-kHz power converter system are presented and discussed to confirm the effectiveness of the proposed topology for PHEV applications.

关键词： Converters BATTERY CHARGING Rectifiers Hybrid electric vehicles topology power loss Harmonic distortion Surgery Power (Psychology) Energy sources

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Spatial-Temporal Enhancement Based Tourism Demand Forecasting: A Deep Model for a Case in Urban Area

SSRN

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SSRN 2022年

作者： Dong, Yunxuan Zhou, Binggui Yang, Guanghua Hou, Fen Hu, Zheng Ma, Shaodan School of Intelligent Systems Science and Engineering Jinan University Zhuhai519070 China State Key Laboratory of Internet of Things for Smart City the Department of Electrical and Computer Engineering University of Macau 999078 China State Key Laboratory of Network and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China

Accurate tourism demand forecasting requires the learning of the spatial-temporal features of tourism demand, which is challenging because the features may constantly change owing to human behavior. In this study, we developed a spatial-temporal feature enhancement model to ensure the integrity of the features of tourism demand. By modeling the tourism system as an undirected graph, we employ the steady-state analysis method of the undirected graph to extract the spatial-temporal features of the tourism system, and the extracted features are employed to construct the enhancement feature vector. However, the spatial-temporal features in the enhancement feature vector are often sparse. We propose a deep model with convolutional filters to ensure the feature learning ability for sparse features;however, there are challenges to using the high-dimensional convolutional filters to learn the features of an one-dimensional time series. Therefore, we convert the feature series into an image series while maintaining the relationship of the spatial-temporal features. The digital footprints of tourists from the urban area of Zhuhai were used to verify the effectiveness of the method. Numerical experiments show that the proposed model can effectively capture the evolution process of the tourism demand system, and the forecasting performance is better than that of state-of-the-art tourism demand forecasting models. © 2022, The Authors. All rights reserved.

关键词： Image enhancement

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Condition Monitoring of PM Synchronous Motor Using High-Frequency Signal Injection in Low Speed Sensorless Control Algorithm

Condition Monitoring of PM Synchronous Motor Using High-Freq...

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International Electric Machines & Drives Conference

作者： M. R. Barzegaran A. Nejadpak O. A. Mohammed Energy Systems Research Laboratory Department of Electrical and Computer Engineering Florida International University Miami FL USA

This paper presents a method based on the wavelet package decomposition (WPD) for condition monitoring of the permanent magnet synchronous motor controlled by sensorless control algorithm. In the proposed method, the wavelet package is used to decompose the frequency spectrum of the motor current. The measured motor current, contains the harmonic created by high frequency voltage injection plus the harmonics of switching action in addition to the frequency of the main supply voltage. Wavelet package is used as a signal processing block to decompose the whole frequency spectrum to several sub-bands. Each sub-band contains essential information related to different events inside the motor. Consequently, by using this method not only a better estimation of position and speed is obtained, but also an estimation of the internal temperature condition of the motor is achieved. Also the output spectrum of WPD contains information about mechanical deformation of the motor bearing. A 2D finite element (FE) analysis is performed to observe the physical and mechanical performances of the motor.

关键词： Condition monitoring Sensorless control Permanent magnet synchronous motor wavelet package decomposition

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Optimal Control of Pedestrian Evacuation in a Corridor

Optimal Control of Pedestrian Evacuation in a Corridor

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International Conference on Intelligent Transportation

作者： Apoorva Shende Pushkin Kachroo C. Konda Reddy Mahendra Singh Department of Engineering Science and Mechanics Virginia Polytechnic Institute and State University Blacksburg VA USA Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA Nonlinear Systems Laboratory (NSL) AeroSpace and Ocean Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

The problem of optimal control of pedestrian evacuation from a corridor has been addressed. The corridor has been treated as a one dimensional link in the building network from which the pedestrians have to be evacuated. The governing flow equations are derived from the discretized continuity equation and a flow density relation for the pedestrian flow. Necessary conditions for the optimal control of these differential equations are developed using the calculus of variations method. The necessary conditions constitute a 2 point boundary value problem that has to be solved for the state, the co-state and the optimal control. Method of steepest descent is used to solve this problem. Numerical results are presented in the end for a test case.

关键词： Optimal control Vehicle dynamics Traffic control Microscopy Intelligent transportation systems Differential equations Calculus Testing Routing Buildings

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