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Optics and Photonics Conference (SBFoton IOPC), SBFoton International

作者： David Esteban Farfán-Guillén Alexandre De Almeida Prado Pohl Graduate Program in Electrical and Computer Engineering (CPGEI) Federal University Technology-Parana Curitiba Brazil

This work compares illumination and communication performance of 2 × 2, 3 × 2 and 4 × 2 MIMO-OFDM VLC links. Results show that not every configuration complies with the recommended illumination levels (... 详细信息

ISBN: (数字)9798350388176

ISBN: (纸本)9798350388183

关键词： Spatial diversity Lighting Optics MIMO Robustness Photodetectors Indoor environment Antennas Visible light communication Photonics

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Evaluating QoE in Cloud-Based Virtual Reality Systems: A Pilot Study

Evaluating QoE in Cloud-Based Virtual Reality Systems: A Pil...

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International Workshop on Secure Internet of Things (SIoT)

作者： Mariana Godoy Fabiana Machado Igor Vieira Ricardo Mello Anselmo Frizera Graduate Program in Electrical Engineering Federal University of Espírito Santo Vitória Brazil

ISBN: (数字)9798331507466

ISBN: (纸本)9798331507473

The importance of proper human-machine interaction has become increasingly recognized in several sectors, such as industry, health, and education. Extended Reality (XR) technologies are currently being explored to generate innovative interaction techniques and to enhance immersion during HMI. However, solutions involving XR require high computational power, which may affect cost efficiency for large-scale deployment. Cloud computing may be a viable solution for generating XR content - which can be streamed to XR devices - and to enable its use within places were multiple people are connected to the XR the same time (e.g., factory floors were workers use headmounted displays to visualize and interact with the machinery). Nevertheless, the remote generation of XR content faces problems such as the effect of latency upon the system. This article presents a pilot study on the use of cloud-based VR systems to analyze the effect of latency on user-perceived quality of experience (QoE).

关键词： Cloud computing Visualization Cybersickness Statistical analysis Games Quality of service User experience Social Internet of Things Quality of experience Testing

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Extreme Fast Charging Station for Multiple Vehicles with Sinusoidal Currents at the Grid Side

Extreme Fast Charging Station for Multiple Vehicles with Sin...

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2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2022

作者： Brandao, Dener A. De L. Parreiras, Thiago M. Pires, Igor A. Filho, Braz De J. Cardoso Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil Institute of Technological Sciences Universidade Federal de Itajuba Itabira Brazil Department of Electronics Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil Department of Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil

ISBN: (数字)9781665492065

ISBN: (纸本)9781665492065

As the electrical vehicle fleet grows, extreme fast charging (XFC) stations for multiple vehicles will be increasingly needed. The challenges for the implementation of many XFC stations in the electric power system are many and it is necessary to use converters that reduce the negative impacts on the electric grid, meet the standards and recommendations, and that are technically and economically viable. This work proposes an XFC station for multiple vehicles that has a very low current harmonics injection at the grid side, with a Total Demand Distortion (TDD) of 0.62% without using sinusoidal filter, provides galvanic isolation for each input/output port, and can provide additional features such as Distributed Energy Resources (DER) integration and ancillary services. This is achieved by combining a bidirectional low switching frequency grid-connected active front-end with high switching frequency SiC-based dc/dc converters in the vehicles side. After a brief description of the proposed system and its control, simulation results are presented to validate the XFC. © 2022 IEEE.

关键词： Rectifying circuits

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Multiplexed Nanoscopy via Buffer Exchange

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ACS Nano 2024年第34期18卷 23445-23456页

作者： Chang, Ting-Jui Ben Yang, T. Tony Department of Electrical Engineering National Taiwan University Taipei10617 Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei10617 Taiwan Department of Physics National Taiwan University Taipei10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Taipei10617 Taiwan

Understanding cellular functions, particularly in their intricate complexity, can greatly benefit from the spatial mapping of diverse molecules through multitarget single-molecule localization microscopy (SMLM). Existing methodologies, primarily restricting the encoding dimensions to color and lifetime or requiring cyclic staining, often involve broad chromatic detection, specialized optical configurations, or sophisticated labeling techniques. Here, we propose a simple approach called buffer-exchange stochastic optical reconstruction microscopy (beSTORM), which introduces an additional dimension to differentiate between single molecules irrespective of their spectral properties. This method leverages the distinguishable photoblinking responses to distinct buffer conditions, offering a straightforward yet effective means of fluorophore discrimination. Through buffer exchanges, beSTORM achieves multitarget SMLM imaging with minimal crosstalk. Direct integration with expansion microscopy (ExM) demonstrates its capability to resolve up to six proteins at the molecular level within a single emission color without chromatic aberration. Overall, beSTORM presents a highly compatible imaging platform, promising significant advancements in highly multiplexed nanoscopy for exploring multiple targets in biological systems with nanoscale precision. © 2024 The Authors. Published by American Chemical Society.

关键词： Stochastic systems

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ViT-slice: End-to-end Vision Transformer Accelerator with Bit-slice Algorithm 24

ViT-slice: End-to-end Vision Transformer Accelerator with Bi...

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61st ACM/IEEE Design Automation Conference, DAC 2024

作者： Shin, Dongjin Choi, Insu Yang, Joon-Sung Department of Electrical and Electronic Engineering Yonsei University Seoul Korea Republic of Department of Systems Semiconductor Engineering Yonsei University Seoul Korea Republic of BK21 Graduate Program in Intelligent Semiconductor Technology Yonsei University Seoul Korea Republic of

ISBN: (纸本)9798400706011

Vision Transformers have demonstrated remarkable performance in various vision tasks. However, general-purpose processors, such as CPUs and GPUs, face challenges in efficiently handling the inference of Vision Transformers. To address the issue, prior works have focused on accelerating only attention due to its high computational cost in NLP Transformers. In contrast, Vision Transformers demonstrate a higher computational cost due to linear modules such as linear transformation, linear projection and Feed-Forward Network (FFN), compared to attention. In this paper, we present ViT-slice, an algorithm-architecture co-design that enhances end-to-end performance and energy efficiency by optimizing not only attention but also linear modules. At the algorithm level, we propose bit-slice compression that avoids storing the redundant most significant bits (MSBs). Additionally, we present bit-slice dot product with early skip to efficiently compute the dot product using bit-sliced data. To enable early skip during the dot product computation, we leverage a trainable threshold. On the hardware level, we introduce a specialized bit-slice dot product unit (BSDPU) to efficiently process the bit-slice dot product with early skip algorithm. Additionally, we present a bit-slice encoder and decoder for on-chip bit-slice compression. ViT-slice achieves 244×, 35.3×, 16.8×, 10.4×, 5.0× end-to-end speedup over Xeon CPU, EdgeGPU, TITAN Xp GPU, Sanger accelerator and ViTCoD accelerator, respectively. © 2024 Copyright held by the owner/author(s).

关键词： Linear transformations

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Analytical reference compensation for tracking dynamic target signals with linear robust MPC strategies

Analytical reference compensation for tracking dynamic targe...

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American Control Conference (ACC)

作者： Tito L. M. Santos Bruno S. S. Pereira Department of Electrical and Computer Engineering Federal University of Bahia Salvador Bahia Brazil Graduate Program on Electrical and Engineering Federal University of Bahia Salvador Bahia Brazil Department of Robotics SENAI-CIMATEC Salvador Bahia Brazil

ISBN: (数字)9798350382655

ISBN: (纸本)9798350382662

This paper proposes an analytical target modifi-cation for linear robust model predictive control strategies in order to deal with time-varying references defined by dynamic signal targets. The new approach can be directly integrated to linear robust model predictive control algorithms that achieve piecewise constant reference tracking if recursive feasibility is ensured for any set-point. The main contribution is to present a direct analytical approach that provides a potentially improved steady-state tracking error performance with the same computation complexity of the original MPC for tracking piecewise constant reference. A simulation case study based on the trajectory tracking control of a quadrotor is used to illustrate the usefulness of the new analytical target modification layer.

关键词： Sufficient conditions Target tracking Trajectory tracking Heuristic algorithms Prediction algorithms Steady-state Computational complexity

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A Zero Harmonic Distortion Master Converter for Medium Voltage Microgrids

A Zero Harmonic Distortion Master Converter for Medium Volta...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Gabriel V. Ramos Dener A. de L. Brandão Thiago M. Parreiras Danilo I. Brandao Braz de J. C. Filho Graduate Program in Electrical Engineering - Universidade Federal de Minas Gerais Belo Horizonte MG Brazil Department of Electrical Engineering Centro Federal de Educação Tecnológica de Minas Gerais Belo Horizonte Brazil Department of Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil

ISBN: (数字)9798331516116

ISBN: (纸本)9798331516123

This paper proposes the Zero Harmonic Distortion Converter (ZHD) as a master converter (MC) for medium voltage microgrids, delivering sinusoidal waveforms in both grid-connected and islanded mode without sinusoidal capacitive filtering elements. The ZHD MC ensures seamless transitions between modes using a simple control approach that eliminates the need off a voltage closed-loop control for grid-connected, islanded, and transition modes, using only a current closed-loop control for grid-connected operation. Simulation and hardware-in-the-loop results show the performance of the ZHD MC converter.

关键词： Electric potential Filtering Microgrids Medium voltage Power electronics Harmonic distortion Distributed power generation Reliability Voltage control

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Maximum Application of Power Point Tracker on Microcontroller Based Dual Energy Solar Powered Dryer 3rd

Maximum Application of Power Point Tracker on Microcontrolle...

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3rd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2021

作者： Jalil, Saifuddin Muhammad Husaini Munadi, Rizal Sara, Ira Devi Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Electrical and Computer Engineering Universitas Syiah Kuala Darussalam Banda Aceh23111 Indonesia Department of Mechanical Engineering Universitas Syiah Kuala Darussalam Banda Aceh23111 Indonesia Department of Electrical Universitas Malikussaleh Lhokseumawe24351 Indonesia

ISBN: (纸本)9789811936289

Solar-powered dryers are still expensive and difficult to obtain for farmers with medium to low production capacity. For this reason, it is necessary to develop technology on a solar-powered dryer with a solar panel capacity of 200WP is equipped with a maximum power point tracker as an integrated solar collector with a photovoltaic system. The system in this solar-powered dryer consists of a solar panel tracker, a rotating aluminum cylinder net, a photovoltaic tracker, a battery bank, a microcontroller, and a DC/AC inverter. This system improves the performance of solar panels in the drying process of Moringa leaves. This design is expect to be the right system to ensure maximum results by providing solar radiation energy in the drying process of agricultural products. The aims goal to minimize problems in the drying of agricultural products experienced by farmers using an automatic dual-energy solar-powered dryer as a development innovation for the drying process. This study uses an experimental methodology and field data collection using a solar-powered dryer that has been analyzed and measured to obtain data comparisons. shows the maximum data of voltage and power response in positioning photovoltaic to produce the increased output power of photovoltaic array. Maximum application of powerpoint tracker on microcontroller based dual energy solar powered dryer on solar panels for drying moringa leaves produces the advantage of maximum energy absorption in solar panels and shortens the time in the drying process of moringa leaves. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Microcontrollers

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Tuning Key Parameters of Electric Circuit Model for Application in Solid-State Supercapacitors 7

Tuning Key Parameters of Electric Circuit Model for Applicat...

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7th International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2023

作者： Ferreira, Paulo Saud, Hene Oliveira, Pedro Trigueiro, Joao Paulo Lavall, Rodrigo Salles, Luciana Universidade Federal de Minas Gerais Graduate Program in Electrical Engineering Belo Horizonte Brazil Universidade Federal de Minas Gerais Electrical Engineering Department Belo Horizonte Brazil Universidade Federal de Minas Gerais Department of Chemistry Belo Horizonte Brazil Instituto Federal de Educação Ciência e Tecnologia de Minas Gerais Department of Chemistry/ICEx Betim Brazil Universidade Federal de Minas Gerais Department of Chemistry/ICEx Belo Horizonte Brazil

ISBN: (纸本)9798350326512

Supercapacitors have been widely studied and used on electrical and electronic circuits as energy storage devices. The potential of using supercapacitors in engineering is being continually explored and it is essential to use models compatible with Electronic Design Automation tools. The existing models do not fully comply with the modeled device and often their use requires adjustments to bring the modeled device closer to the real one. The two branches model is one of the simplest to-use parameter calculation methods found in the literature for modeling and specifying supercapacitors of capacitances in a range of up to 103 F. In this paper, it was adopted in the study of miniaturized and flexible solid-state devices with capacitances in the range of up to 10-3 F. The result is a method applicable in specifying and simulation of tens of millifarad supercapacitors used in IoT devices using SoC technology. © 2023 IEEE.

关键词： Supercapacitor

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Electrostatic Shielding for Bearing Current Mitigation - An Analysis of its Thermal Impact on the Motor

Electrostatic Shielding for Bearing Current Mitigation - An ...

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2022 IEEE IAS Petroleum and Chemical Industry Technical Conference, PCIC 2022

作者： Evo, Marco T.A. Junior, Arismar M.G. Silva, Caio Eduardo De Paula, Helder Federal University of São João Del Rei Electrical Engineering Department MG São João del Rei36307-352 Brazil Federal University of Uberlândia Graduate Program in Electrical Engineering MG Uberlândia Brazil Federal University of Uberlândia Faculty of Electrical Engineering MG Uberlândia Brazil

ISBN: (纸本)9781665497169

This work presents a study on the use of electrostatic shields to reduce bearing currents (both Electrostatic discharge machining and circulating currents), focusing on its thermal impact on the motor operation. 2-D finite element models are utilized to analyze the temperature distribution inside the coil winding slot of motors both with and without shielding. The results show that the shielding device can be used with a negligible influence on the temperature rise inside the slot. In addition, it is demonstrated that for some shield configurations, the stator winding eddy current loss can be attenuated. In such cases, the shield presence can also lead to a temperature reduction in the stator conductors. Furthermore, the developed models can be expanded to be used in the analysis of any other motor equipped with this type of solution, aiding the design and implementation of the shielding device. Keeping in mind that the majority of the motor failures are due to bearing problems, this paper contributes to the industry by addressing issues closely related to the reliability topic, such as solutions to increase the motor availability, which is the very case of the shielding device. © 2022 IEEE.

关键词： Induction motors

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