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4th International Conference on electrical, Communication and computer engineering, ICECCE 2023

作者： Bhatti, Afaq Ahmed Zaman, Fawad Abbas, Syes Muzahir Phanomchoeng, Gridsada Khan, Shafqat Ullah Waseem, Athar Department of Electrical and Computer Engineering COMSATS University Islamabad Pakistan School of Engineering Faculty of Science and Engineering Macquarie University SydneyNSW2109 Australia Department of Mechanical Engineering Chaulalongkorn University Bangkok Thailand Department of Electronics University of Buner Buner Pakistan Department of Electrical Engineering International Islamic University Islamabad Pakistan

ISBN: (纸本)9798350369694

Planar antenna arrays are considered as the one of the important parts in the applications like broadcasting, sonar and radar communication. In order to produce the directed beam of desired angles, the planar antenna array is used with large number of antenna elements. In the presence of faulty element(s) the resultant radiation pattern is distorted with high magnitude side lobes and reduced gain. The process of detection is discussed widely in linear arrays but for the planar arrays this study is limited. This study developed the process of the detection of the faulty antenna(s) in the planar array using a detection algorithm by comparing the weights of array with faulty antennas with the weights of arrays with healthy antennas. The analysis was varied for different orientations of 4 × 4 and 6 × 6 arrays with single and multiple element failures. The detection algorithm was found to be efficient in detecting the faulty elements with great accuracy. © 2023 IEEE.

关键词： Fault detection

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A Low-Cost Wearable Exoskeleton for Sitting and Standing Assistance

A Low-Cost Wearable Exoskeleton for Sitting and Standing Ass...

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International Workshop on Wearable and Implantable Body Sensor Networks (BSN)

作者： Kayla Blalack Leo Wang Maximus Maldonado Lauren Marbury Soroush Zare Ye Sun Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville VA Department of Electrical and Computer Engineering University of Virginia Charlottesville VA

ISBN: (数字)9798331530143

ISBN: (纸本)9798331530150

This paper presents the design, prototyping, and testing of a low-cost wearable exoskeleton that assists sitting-to-standing and standing-to-sitting (STS) transitions for users with lower limb mobility impairment. This exoskeleton design utilizes the mechanism of invisible chairs as the supporting structure and powers the knee and hip joints to provide fast and smooth transitions between sitting and standing. This exoskeleton features low cost, and minimally invasive design, making it suitable for everyday use. The study highlights the potential of this device to improve the quality of life for elderly individuals by promoting safer and more independent mobility.

关键词： Body sensor networks Minimally invasive surgery Costs Exoskeletons Robot sensing systems Older adults Hip Testing

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Leveraging Opinions and Vaccination to Eradicate Networked Epidemics

Leveraging Opinions and Vaccination to Eradicate Networked E...

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European Control Conference (ECC)

作者： Humphrey C. H. Leung Zhuocong Li Baike She Philip E. Paré School of Electrical and Computer Engineering Purdue University Department of Mechanical and Aerospace Engineering University of Florida

We introduce a multi-layer networked compartmental ${SIRS} - V_{o}$ model that captures opinion dynamics, disease spread, risk perception, and self-interest vaccine-uptake behavior in an epidemic process. We characterize the target vaccination criterion of the proposed model and conditions that guarantee the criterion is obtainable by influencing opinions on disease prevalence. We leverage this result to design an eradication strategy that leverages opinions and vaccination. Through numerical simulations, we show that the proposed eradication strategy is able to stabilize the epidemic process around a healthy state equilibrium, and the outbreak rebounds after the control signal is relaxed

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Predicting the friction angle of clays using a multi-layer perceptron neural network enhanced by yeo-johnson transformation and coral reefs optimization

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Journal of Rock Mechanics and Geotechnical engineering 2024年第10期16卷 3982-4003页

作者： Libing Yang Trung Nguyen-Thoi Trung-Tin Tran College of Civil Engineering and Architecture Hunan Institute of Science and TechnologyYueyang414006China Laboratory for Applied and Industrial Mathematics Institute for Computational Science and Artificial IntelligenceVan Lang UniversityHo Chi Minh CityViet Nam Faculty of Mechanical-Electrical and Computer Engineering School of TechnologyVan Lang UniversityHo Chi Minh CityViet Nam Department of Information Technology Greenwich VietnamFPT UniversityDa Nang550000Viet Nam

The accurate prediction of the friction angle of clays is crucial for assessing slope stability in engineering *** study addresses the importance of estimating the friction angle and presents the development of four soft computing models:YJ-FPA-MLPnet,YJ-CRO-MLPnet,YJ-ACOC-MLPnet,and *** of all,the Yeo-Johnson(YJ)transformation technique was used to stabilize the variance of data and make it more suitable for parametric statistical models that assume normality and equal *** technique is expected to improve the accuracy of friction angle prediction *** friction angle prediction models then utilized multi-layer perceptron neural networks(MLPnet)and metaheuristic optimization algorithms to further enhance performance,including flower pollination algorithm(FPA),coral reefs optimization(CRO),ant colony optimization continuous(ACOC),and cuckoo search algorithm(CSA).The prediction models without the YJ technique,***-MLPnet,CRO-MLPnet,ACOC-MLPnet,and CSA-MLPnet,were then compared to those with the YJ technique,***-FPA-MLPnet,YJ-CRO-MLPnet,YJ-ACOC-MLPnet,and *** these,the YJ-CRO-MLPnet model demonstrated superior reliability,achieving an accuracy of up to 83%in predicting the friction angle of clay in practical engineering *** improvement is significant,as it represents an increase from 1.3%to approximately 20%compared to the models that did not utilize the YJ transformation technique.

关键词： Natural hazards Slope stability Friction angle Clay Soft computing models Geotechnical engineering

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Dynamic Battery Type Detection Using Neural Networks 20

Dynamic Battery Type Detection Using Neural Networks

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20th IEEE International Conference on Smart Communities: Improving Quality of Life using AI, Robotics and IoT, HONET 2023

作者： Lopez, Hector K. Zilouchian, Ali Abtahi, Amir Florida Atlantic University Department of Electrical Engineering & Computer Science Boca RatonFL United States Florida Atlantic University Department of Ocean and Mechanical Engineering Boca RatonFL United States

ISBN: (纸本)9798350331110

Dynamically detecting battery chemistries, including LiFePO4, Ni-MH, and Lead Acid, is explored through extensive simulations. Utilizing discharge curves as training data, three neural network architectures-Single Hidden Layer, Double Hidden Layer, and Radial Basis Transfer Function-are employed for pattern recognition across diverse discharge profiles. The objective is to enable the identification of connected battery types and optimize charging control. This research holds significance in real-time Electric Vehicle (EV) charging optimization, offering the capability to discern various battery chemistries. Additionally, in Peer-to-Peer (P2P) energy markets, the dynamic contribution of batteries to the grid requires safe and efficient charging for interoperable systems. The findings presented in this study introduce adaptable systems, fostering innovation in sustainable energy practices. © 2023 IEEE.

关键词： Charging (batteries)

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Analytical Methods for Determining High Frequency Winding Loss for Toroidal Inductors

Analytical Methods for Determining High Frequency Winding Lo...

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2023 IEEE Electric Ship Technologies Symposium, ESTS 2023

作者： Marzec, Todd J. Raju, Ravisekhar Grainger, Brandon Ohodnicki, Paul R. University of Pittsburgh Department of Electrical and Computer Engineering Pittsburgh United States Fastwatt Llc Clifton Park United States University of Pittsburgh Department of Mechanical Engineering and Materials Science Pittsburgh United States

ISBN: (纸本)9781665465151

Inductors are energy storage devices that serve as key components in power conversion technology. The advent of wide-bandgap (WBG) semiconductor devices has led to high frequency operation of power converters at higher voltage and current levels. In the range of 20kHz-1MHz, additional sources of loss in magnetic components interfacing to these WBG semiconductors are introduced due to high-frequency electromagnetic phenomena. Finite element analysis can capture these effects to a high degree of accuracy but require extensive computation time precluding their application in robust optimization and design schemes. There exist several analytical models for winding loss in literature that can evaluate multiple designs with minimal computation cost. In this work, popular models are reviewed, investigated, and expanded on in the context of various toroidal winding geometries. The goal of this work is to analyze well-known winding loss models and demonstrate their accuracies at high frequency (beyond 20kHz) as they pertain to toroidal inductors while maintaining the low computation cost required for integration into optimization and design schemes. © 2023 IEEE.

关键词： Analytical models

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Design and implementation of power socket soldering robot arm system 4

Design and implementation of power socket soldering robot ar...

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2024 4th International Conference on Artificial Intelligence and Industrial Technology Applications, AIITA 2024

作者： Liu, Jingqiao Wu, Shuqin Lin, Zicheng Zhang, Huimin Fan, Yong Xie, Wu School of Mechanical and Electrical Engineering Guilin University of Electronic Technology Guilin541004 China School of Architecture and Transportation Engineering Guilin University of Electronic Technology Guangxi Guilin541004 China School of Computer Science and Information Engineering Guangxi Normal University Guilin541004 China School of Computer Science and Information Security Guilin University of Electronic Technology Guilin541004 China

In order to solve the problem of high cost and low efficiency in manual welding of power socket welding components, a soldering robot arm system was developed. The gripper, 5-DOF manipulator, clamp, support, and control system were designed. The coordinate system of the robot arm was constructed, and the working space of the robot arm was analyzed by using the MATLAB robot toolbox. It was concluded that the x0 coordinate range of the welding working area was [175mm, 215mm], the y0 coordinate range was [55mm, -55mm], and the z0 coordinate was 90mm. At the same time, the motion trajectory of the robot arm was determined. Using Raspberry PI as a controller, the control system is developed by programming Python language. The prototype is made, and a welding test is carried out. The test shows that the system has completed the welding operation, and the welding effect is good. © Published under licence by IOP Publishing Ltd.

关键词： MATLAB

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Impact of exposure time and power intensity on cell viability in 3D bioprinting 12

Impact of exposure time and power intensity on cell viabilit...

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Laser 3D Manufacturing XII 2025

作者： Tavares-Negrete, Jorge A. Babayigit, Ceren Boyraz, Ozdal Esfandyarpour, Rahim Laboratory for Integrated Nano Bio Electronics Innovation The Henry Samueli School of Engineering University of California IrvineCA92697 United States Department of Biomedical Engineering The University of California IrvineCA92697 United States Department of Electrical Engineering and Computer Science The University of California IrvineCA92697 United States Department of Mechanical and Aerospace Engineering The University of California IrvineCA92697 United States Henry Samueli School of Engineering University of California IrvineCA92697 United States

ISBN: (纸本)9781510684560

In 3D bioprinting, the photopolymerization of bioinks is a critical step in building desired structures with high precision. The chosen parameters, such as exposure time and light intensity during photopolymerization of the bioinks, significantly influence the resolution, cell viability, and proliferation of the bioprinted constructs. This study investigates how varying exposure times (10-30 s) and light intensities (0.04-0.11 mW/mm^2) in a laser-based bioprinter affect the performance of 3T3 fibroblasts embedded in GelMA bioinks. The metabolic activity and cell morphology of the bioprinted constructs were assessed over a week-long culture period. The findings reveal a clear relationship between longer exposure times and reduced cell viability. On day 7, samples exposed for extended periods exhibited the lowest metabolic activity, with differences of around 40% between treatments. In contrast, samples exposed to different light intensities resulted in variations below 15% in metabolic activity. GelMA bioinks exhibited less favorable outcomes under prolonged exposure, with cells displaying more rounded and less proliferative morphologies. In contrast, lower exposure times promoted more elongated cell shapes and network formation. These results highlight the importance of optimizing exposure time and light intensity to preserve cell wellness in 3D bioprinted constructs. © 2025 SPIE.

关键词： Cell culture

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MICROSTRUCTURE AND MORPHOLOGY ANALYSIS OF DC-MAGNETRON SPUTTERED TiAlSi THIN COATINGS ON GLASS, T42 HIGH SPEED STEEL, AND AISI 01 TOOL STEEL SUBSTRATES

MICROSTRUCTURE AND MORPHOLOGY ANALYSIS OF DC-MAGNETRON SPUTT...

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ASME 2024 International mechanical engineering Congress and Exposition, IMECE 2024

作者： Wambua, Job M. Mwema, Fredrick M. Zoppi, Guillaume Woo, Wai-Lok Akinlabi, Esther T. Department of Mechanical and Construction Engineering Northumbria University Newcastleupon Tyne United Kingdom Department of Mathematics Physics and Electrical Engineering Northumbria University Newcastleupon Tyne United Kingdom Department of Computer and Information Sciences Northumbria University Newcastleupon Tyne United Kingdom Department of Mechanical Engineering Science University of Johannesburg South Africa

ISBN: (纸本)9780791888612

This study investigates the properties of the base coating, TiAlSi, which is often used in reactive sputtering for surface protection of conventional tool materials for machining operations. The TiAlSi thin film coatings were deposited on glass, T42 High-Speed Steel (HSS), and AISI 01 Tool Steel (TS). TiAlSi thin films are deposited by Direct Current (DC) Magnetron Sputtering (DCMS) using a custom-made Ti52Al16Si10 wt.% target using a range of substrate temperatures (23 - 400 °C) and deposition times (40 - 190 minutes). The thickness of the thin films significantly reduces from about 252 nm to 122 nm with an increase in the substrate temperature from 23 °C to 400 °C, respectively. The topographic and microstructural analyses show large and flattened particles of TiAlSi thin films on coatings deposited for longer periods (at 150 and 190 minutes) and a reduction in the physical grain sizes with increased substrate temperature, hence the reduced coating thickness. High-temperature deposition of TiAlSi coatings on HSS and TS leads to the development of troughs, hillocks, and craters as the major forms of defects, which ultimately increase the roughness values of the thin films. Analysis of the crystal structure of the as-deposited TiAlSi coatings shows the amorphous nature of the coatings with no observable peaks. These findings allow for the precise tailoring of the deposition parameters of TiAlSi thin films as base coatings for Ti-based thin films for surface protection of cutting tools. Copyright © 2024 by ASME.

关键词： High speed steel

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Viable, Reliable, and Buyable: Propane for Electricity Generation in Haiti 13

Viable, Reliable, and Buyable: Propane for Electricity Gener...

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13th Annual IEEE Global Humanitarian Technology Conference, GHTC 2023

作者： Thomas, Brian Phillips, Ben Garrett, Kayla Baylor University Department of Electrical and Computer Engineering Waco United States Baylor University Department of Mechanical Engineering Waco United States Baylor University Department of Environmental Science Waco United States

ISBN: (纸本)9798350321326

Electricity production in Haiti largely relies on gasoline or diesel generators whose fuel supply is frequently threatened by political, civil, and economic unrest. Retail sellers have recurring shortages, which leaves black-market fuel sales as the more dominant fuel access network. Our research monitors the black-market "street"prices for gasoline and diesel for one year in the second largest city, Cap Haitïen. We have also monitored the price and availability of propane, which has not experienced the same shortages or price variability. Propane, therefore, is the least expensive and most readily available fuel for generating electricity at small scales. This data has encouraged us to deploy three small gasoline generators that have been modified to operate on propane in hopes of providing a viable, reliable, and buyable solution for individuals, organizations, and businesses that are experiencing energy poverty. © 2023 IEEE.

关键词： Sales

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