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International Conference on Intelligent and Fuzzy Systems, INFUS 2020

作者： Mercan, Öykü Berfin Kılıç, Volkan Electrical and Electronics Engineering Graduate Program Izmir Katip Celebi University Izmir Turkey

ISBN: (纸本)9783030511555

The recent advances in smartphone technology have led to the emergence of simple, low-cost and portable platforms that aim reliable qualitative and quantitative analysis of colored solutions. In this paper, we present a new approach based on fuzzy classification for quantitative detection of peroxide relying on color change due to concentration level. The proposed fuzzy classification algorithm was integrated with a smartphone via a cloud system. Our custom-designed Android application was developed with a user-friendly interface to allow the users to capture the image of peroxide strips and crop the region of interest on the image for quantification. Average RGB (Red-Green-Blue) values in the cropped region were calculated to transfer these values to our proposed fuzzy logic classifier via a cloud system to quantify the peroxide content. The proposed fuzzy classifier evaluates the concentration value based on RGB values and sends back to the Android application via the cloud system. Experimental investigations show the advantage of the proposed system for the quantification of peroxide. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Smartphones

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PID Tuning for Time-Varying Delay Systems Based on Modified Smith Predictor

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IFAC-PapersOnLine 2017年第1期50卷 1269-1274页

作者： de Oliveira F.S.S. Souza F.O. Palhares R.M. Graduate Program in Electrical Engineering United States Department of Electronics Engineering Federal University of Minas Gerais Belo Horizonte MG Brazil

This paper presents a new linear matrix inequality (LMI) based control strategy for second-order systems with time-varying delay based on a modified Smith predictor with a proportional-integral-derivative (PID) controller. The main idea consists in representing the predictor model as a closed-loop observer, which takes into account only the estimated average value of the time-delay such that no real time measurement of the delay is required. A numerical example is introduced to illustrate the effectiveness of the proposed method. © 2017

关键词： linear matrix inequalities PID controller Process time-delay Smith predictor

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Accessing the viscera: Technologies for interoception research

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Current Opinion in Neurobiology 2025年 93卷 103050-103050页

作者： Pang, Karen K.L. Mondal, Rajib Sahasrabudhe, Atharva Anikeeva, Polina Department of Brain and Cognitive Sciences Massachusetts Institute of Technology United States K. Lisa Yang Brain-Body Center Massachusetts Institute of Technology United States McGovern Institute for Brain Research Massachusetts Institute of Technology United States Research Laboratory of Electronics Massachusetts Institute of Technology United States MIT-Harvard Graduate Program in Health Sciences and Technology United States Department of Materials Science and Engineering Massachusetts Institute of Technology United States

Interoception, or the perception and regulation of body signals by the central nervous system, is critical for maintaining homeostasis and coordination of behaviors. Deciphering the mechanisms of interoception requires identifying pathways and decoding of diverse signals across the brain-body axis. These studies are enabled by tools to modulate and record physiological processes in the brain and visceral organs. While numerous advanced neurotechnologies are well-established in the brain, these techniques often offer limited utility for other organs, such as the gastrointestinal tract, heart, liver, or bladder. In this review, we highlight recent advances in technologies for recording and modulation of visceral organ physiology in small animals in vivo, with a focus on implantable bioelectronic organ interfaces that can be deployed in behaving animals. We discuss how such interfaces are made possible through innovations in materials and electronics and outline unmet technological challenges in interoception research. © 2025 Elsevier Ltd

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Evaluating an e-Learning Platform at graduate School Based on User Experience Evaluation Technique 3

Evaluating an e-Learning Platform at Graduate School Based o...

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3rd International Conference on Electrical, electronics, Informatics, and Vocational Education, ICE-ELINVO 2020

作者： Abubakari, M.S. Nurkhamid Hungilo, G. Department of Electronics Engineering Education Postgraduate Program Universitas Negeri Yogyakarta Indonesia Department of Informatics Engineering Graduate Program University Atma Jaya Yogyakarta Indonesia

This study was aimed to evaluate the e-learning platform in a graduate school by using User Experience Questionnaire (UEQ). The data were collected from 65 respondents and analyzed using an excel data analysis tool. The results indicate that all six scales of the instrument are consistent except the novelty scale. Also, the calculated means of the scales are slightly positive as all values are greater than 0.8 compared to the UEQ benchmark. Although the respondents show a little positive impression with the platform, all scales means are below average category except efficiency scale which is above average as compared to the benchmark. This indicates that the platform needs more improvement in all aspects of user experience for it to be at least in a good category. The findings discussed in this paper are valuable for all academic stakeholders in various educational institutions which implement interactive e-learning systems as well as practitioners of user experience and developers of e-learning systems. © 2021 Published under licence by IOP Publishing Ltd.

关键词： Learning systems

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Comparison of Bioinspired MLP Controllers for Mobile Robots Obstacle Following/Avoidance

Comparison of Bioinspired MLP Controllers for Mobile Robots ...

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2024 IEEE Latin American Conference on Computational Intelligence, LA-CCI 2024

作者： Luiz, Matheus De S. Pastrana, M.A. Da Silva, Lukas. A. Campagnucci, Pamela. R. A. N. Mendoza-Penaloza, Jose Benevides, Rafael R.L. Munoz, Daniel M. University of Brasilia Mechatronics Graduate Program Department of Mechanical Engineering Brasilia Brazil University of Brasilia Faculty of Gama Electronics Engineering Undergraduate Program Brasilia Brazil

ISBN: (纸本)9798350374575

Proportional, integral, and derivative (PID) controllers have been widely adopted for industrial applications. However, these controllers are not very efficient for non-linear systems. Artificial neural networks (ANN) based on the Multilayer Perceptron (MLP) have great potential to replace PID controllers due to their polynomial structure, allowing complex non-linear systems to be controlled. This article introduces the integration of four MLPs as alternatives to a traditional PID controller. These MLPs were trained through four bioinspired algorithms tailored for following tasks in mobile robots. The bioinspired algorithms employed for MLP network training include Particle Swarm Optimization (PSO), Grey Wolf Optimization (GWO), Month-Flame Optimization (MFO), and Artificial Hummingbird Algorithm (AHA). A comparative analysis was conducted between these MLPs and a classic PID controller, focusing on parameters such as overshoot (OS), settling time (ST), and steady-state error for different simulated scenarios. © 2024 IEEE.

关键词： Particle swarm optimization (PSO)

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Investigation of Different Membrane Materials Effects in CMUT Membrane Behaviour 3

Investigation of Different Membrane Materials Effects in CMU...

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3rd International Symposium on Multidisciplinary Studies and Innovative Technologies, ISMSIT 2019

作者： Yasar, Abdullah Irfan Yildiz, Fikret TOBB University Biomedical Engineering Graduate Program Ankara Turkey Hakkari University Electrical and Electronics Engineering Department Hakkari Turkey

ISBN: (纸本)9781728137896

Research on Capacitive Micromachined Ultrasonic Transducers (CMUT), which is MEMS-based new transducer technology compared to piezoelectric in ultrasound applications, has recently increased. It is an important fact that micro and nano technologies provide convenience in many areas. CMUT technology has many advantages, such as its small size, the ease of integration with electronic materials and its compatibility with 2-dimensional geometries. In this study, the effect of different membrane material properties on displacement and output pressure of the CMUT membrane was investigated by assuming that it works in CMUT transmission mode and in the water media. SiC, Si, diamond, Si3N4, and polysilicon were used as membrane material. The membrane radius and thickness were selected as 60 μm and 2.6 μm, respectively. Collapse voltage and impedance values were calculated according to the structural properties of these materials. In addition, the mechanical structure of CMUT was taken into consideration and modeling was performed. Using this model created in the SIMULINK, the displacement and output pressure of CMUT membrane under various DC and AC voltages were analyzed. Under the same DC voltage, silicon membrane had the highest displacement and diamond membrane had the lowest displacement. Square shape wave was used as the AC excitation signal because the square wave was more efficient than the others. Some properties of the AC signal were changed and their effects were investigated. The most suitable material and working environment were tried to be found. Moreover, Si3Ni4 membrane behavior also investigated under different electric field to understand effects of electrode size using same model in air. As a result, this study aims to contribute to efficient CMUT design and determination of optimum parameters and membrane material selection for various applications in the immersion and air. © 2019 IEEE.

关键词： Silicon carbide

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Propagation prediction based on time domain electric field integral equation for smoothly irregular terrains 12

Propagation prediction based on time domain electric field i...

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Barbosa, Ruã Luz Da Silva Moreira, Fernando José Electrical Engineering Graduate Program UFMG Belo Horizonte Brazil Dept. Electronics Engineering UFMG Belo Horizonte Brazil

ISBN: (纸本)9781785617911

This paper proposes a formulation to predict the propagation of a vertically polarized electromagnetic wave in the time domain using the Electric Field Integral Equation over an irregular terrain for a near grazing incidence. The results show good agreement when compared with the ones obtained from the Magnetic Field Integral Equation and the Uniform Theory of Diffraction, both in the time domain. © Institution of engineering and *** Rights Reserved.

关键词： Integral equations

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Mumford-Shah based unsupervised segmentation of brain tissue on MR images

Mumford-Shah based unsupervised segmentation of brain tissue...

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13th Mediterranean Conference on Medical and Biological engineering and Computing 2013, MEDICON 2013

作者： Cevik, A. Eyuboglu, B.M. Biomedical Engineering Graduate Program Graduate School of Natural and Applied Sciences Turkey Department of Electrical and Electronics Engineering Middle East Technical University 06800 Ankara Turkey

ISBN: (纸本)9783319008455

Automated segmentation of different tissues on medical images is a crucial concept for medical image analysis. In this study, unsupervised image segmentation problem is generalized as a Mumford-Shah energy minimization problem, and several solution proposals for the problem are investigated. Ambrosio-Tortorelli approximation method is implemented, and the performance of the algorithm on magnetic resonance (MR) images of brain is evaluated. First image used in the experiments is chosen among the ones which contain an edema formation due to a brain tumor, and the second one belongs to a healthy subject on which gray matter/white matter segmentation is aimed. Acquired results are presented in visual, tabular and numerical forms. Results and performance are discussed and quantitatively evaluated. © Springer International Publishing Switzerland 2014.

关键词： Magnetic resonance

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Suspended Load Path Tracking by a Tilt-rotor UAV

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IFAC-PapersOnLine 2016年第32期49卷 234-239页

作者： Rego, Brenner S. Raffo, Guilherme V. Graduate Program in Electrical Engineering Federal University of Minas Gerais Belo HorizonteMG31270-901 Brazil Department of Electronics Engineering Federal University of Minas Gerais Belo HorizonteMG31270-901 Brazil

This paper deals with the load transportation problem by a tilt-rotor unmanned aerial vehicle. Most approaches address the subject by formulating the system dynamics from the UAV's point of view, with the load's behavior described with respect to it. Difficulties arise if control tasks are given for the load, since the suspended load coordinates do not appear explicitly in the mathematical formulation. A novel approach is proposed, based on the formulation of the system dynamics using position and orientation of the load as generalized coordinates. The equations of motion are developed in detail, yielding a highly coupled state-space representation. It is shown that linear techniques are sufficient for path tracking of the load at low accelerations, even when subject to external disturbances and incomplete, noisy information about the state vector is available. Simulation results are presented in order to validate the proposed approach. © 2016

关键词： Aircraft detection Antennas Equations of motion State estimation State space methods System theory Unmanned aerial vehicles (UAV) External disturbances Generalized coordinates Linear techniques Mathematical formulation Path tracking control Position and orientations Tilt rotor UAV Transportation problem

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Time-domain analysis of classical omnidirectional axis-displaced dual-reflector antennas 12

Time-domain analysis of classical omnidirectional axis-displ...

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： De Barros Carvalho, Rafaela Neves Da Silva Moreira, Fernando José Do Rego, Cássio Gonçalves Graduate Program in Electrical Engineering UFMG Belo Horizonte Brazil Dept. Electronics Engineering UFMG Belo Horizonte MG Brazil

ISBN: (纸本)9781785617911

This work presents an approach to obtain the time-domain electric far field radiated by classical omnidirectional dual-reflector antennas fed by a TEM coaxial horn. The time-domain formulation is developed by means of analytical inversion of the corresponding frequency-domain solution obtained using Geometrical Optics (GO) principles and the aperture method. © Institution of engineering and *** Rights Reserved.

关键词： Time domain analysis

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