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2023 International Conference on Electrical, Computer, Communications and Mechatronics engineering, ICECCME 2023

作者： Penagos, Hernán Paz Gantiva, Manuel Eduardo López, Johnny Alexander Arévalo Escuela Col. de Ing. Julio Garavito Program in Electronic Engineering Bogotá Colombia

ISBN: (纸本)9798350322972

The oil extraction industry is a demanding environment for equipment and machinery, due to the presence of corrosive substances and mechanical stress levels. For this reason, equipment is exposed to a series of factors that can cause failures and reduce its useful life, causing production delays. This study identifies the failures and variables related to erratic movements, structural damage, and overload in shale shaker machines that allows an analysis of the current state of the machine, its performance, and efficiency;to dimension a monitoring and early warning system in real time that reduces damage and reduces downtime. The proposed system includes the schematic design of a remote measurement module, which facilitates its installation and allows a modular implementation, as well as a graphical interface for data analysis. © 2023 IEEE.

关键词： Failure (mechanical)

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Integral Sliding Mode Controller Design for Trajectory Following of a Six Degrees of Freedom Underwater Vehicle 23

Integral Sliding Mode Controller Design for Trajectory Follo...

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23rd International Conference on Control, Automation and Systems, ICCAS 2023

作者： Derbew, Tegen Eyasu Ko, Nak Yong Chosun University IT-Bio Convergence Interdisciplinary Program Department of Electronic Engineering Gwangju64461 Korea Republic of

ISBN: (纸本)9788993215274

This paper presents a robust integral sliding mode controller for trajectory following of a six degrees of freedom underwater vehicle. Sliding mode controller is robust to bounded external disturbances caused by ocean currents, parametric uncertainties, and inevitable modeling errors;but, it is prone to chattering phenomenon. Thus, to address this problem, we proposed an integral sliding mode controller. The controller was designed, and its stability was checked using a Lyapunov approach. The proposed controller was implemented using MATLAB/Simulink® software. A simulation results were presented, and also, its performance was compared with the conventional sliding mode controller. The proposed controller has been observed to effectively drive the vehicle along the desired trajectory, while also reducing the chattering effect when compared to the conventional sliding mode controller. © 2023 ICROS.

关键词： Controllers

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Practical prescribed-time fuzzy tracking control for uncertain nonlinear systems with time-varying actuators faults

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Journal of Automation and Intelligence 2024年第1期3卷 40-49页

作者： Shuxing Xuan Hongjing Liang Tingwen Huang College of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Science Program Texas A&M UniversityDoha 23874Qatar

The paper investigates the practical prescribed-time fuzzy tracking control problem for a category of nonlinear system subject to time-varying actuator *** presence of unknown nonlinear dynamics and actuator faults makes achieving tracking control within a prescribed-time *** tackle this issue,we propose a novel practical prescribed-time fuzzy tracking control strategy,which is independent of the initial state of the system and does not rely on precise modeling of the system and *** apply the approximation capabilities of fuzzy logic systems to handle the unknown nonlinear functions and unidentified actuator faults in the *** piecewise controller and adaptive law constructed based on piecewise prescribed time-varying function and backstepping technique method establish the theoretical framework of practical prescribed-time tracking control,and extend the range of prescribed-time tracking control to *** of the initial conditions,the proposed control strategy can guarantee that all signals remain uniformly bounded within the practical prescribed time in the presence of unknown nonlinear item and time-varying actuator *** example is presented to demonstrate the effectiveness of the proposed control strategy.

关键词： Prescribed-time tracking control Adaptive fuzzy control Actuator faults Uncertain nonlinear system

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New Energy-Efficient 3-2 and 4-2 Approximate Adder Compressors Topologies 30

New Energy-Efficient 3-2 and 4-2 Approximate Adder Compresso...

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30th IEEE International Conference on electronics, Circuits and Systems, ICECS 2023

作者： Lopes, Rodrigo Antonietti, Leonardo Rosa, Morgana M. A. Costa, Eduardo Soares, Rafael Bampi, Sergio Graduate Program on Computing Pelotas Brazil Graduate Program on Electronic Engineering and Computing Pelotas Brazil PPGC & PGMICRO - Informatics Institute Porto Alegre Brazil

ISBN: (纸本)9798350326499

Addition units are present across many computational kernels inherent in various error-tolerant applications, including machine learning, signal, image, and video processing. Notably, adder compressors are the target when high speed and low power are the main design concerns. This work introduces energy-efficient structures of 3-2 approximate adder compressors (Ax3-2) and three distinct versions of 4-2 approximate adder compressors (Ax4-2). We compared our proposed Ax3-2 and Ax4-2 compressors with state-of-the-art energy-efficient approximate adder compressors (AxACs). Both Ax3-2 and Ax4-2 models passed through rigorous tests as standalone units. Furthermore, we integrated the Ax4-2 models into an essential application kernel appearing in video coding, i.e., the Sum Squared Differences (SSD) video accelerator. We introduce Ax3-2 and Ax4-2 that yield a new Pareto front concerning both energy-quality and area-quality trade-offs, thereby demonstrating a marked improvement over the prevailing state-of-the-art energy-efficient AxACs. © 2023 IEEE.

关键词： Adders

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Retinal Blood Vessel Tracking and Diameter Estimation via Gaussian Process With Rider Optimization Algorithm

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IEEE Journal of Biomedical and Health Informatics 2024年第3期28卷 1173-1184页

作者： Ahmad, Nehal Lai, Kuan-Ting Tanveer, M. Indian Institute of Technology Indore Simrol Department of Mathematics Indore453552 India National Taipei University of Technology Department of International Program of Electrical Engineering and Computer Science Taipei106 Taiwan National Taipei University of Technology Department of Electronic Engineering Taipei106 Taiwan

Retinal blood vessels structure analysis is an important step in the detection of ocular diseases such as diabetic retinopathy and retinopathy of prematurity. Accurate tracking and estimation of retinal blood vessels in terms of their diameter remains a major challenge in retinal structure analysis. In this research, we develop a rider-based Gaussian approach for accurate tracking and diameter estimation of retinal blood vessels. The diameter and curvature of the blood vessel are assumed as the Gaussian processes. The features are determined for training the Gaussian process using Radon transform. The kernel hyperparameter of Gaussian processes is optimized using Rider Optimization Algorithm for evaluating the direction of the vessel. Multiple Gaussian processes are used for detecting the bifurcations and the difference in the prediction direction is quantified. The performance of the proposed Rider-based Gaussian process is evaluated with mean and standard deviation. Our method achieved high performance with the standard deviation of 0.2499 and mean average of 0.0147, which outperformed the state-of-the-art method by 6.32%. Although the proposed model outperformed the state-of-the-art method in normal blood vessels, in future research, one can include tortuous blood vessels of different retinopathy patients, which would be more challenging due to large angle variations. We used Rider-based Gaussian process for tracking blood vessels to obtain the diameter of retinal blood vessels, and the method performed well on the 'STrutred Analysis of the REtina (STARE) Database' accessed on Oct. 2020 (https://***/~ahoover/stare/). To the best of our knowledge, this experiment is one of the most recent analysis using this type of algorithm. © 2013 IEEE.

关键词： Blood vessels

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Characteristics of stroke polarity in the central region of Colombia 37

Characteristics of stroke polarity in the central region of ...

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37th International Conference on Lightning Protection, ICLP 2024

作者： Suárez-Balaguera, Aicardo Díaz-Ortiz, Fernando Román, Francisco Electromagnetic Compatibility Research Group Universidad Nacional de Colombia Bogotá Colombia Electronic Engineering Program Universidad de Cundinamarca Fusagasugá Colombia

ISBN: (纸本)9783800764174

This study explores the characteristics of stroke polarity in the central region of Colombia, analyzing data from 2016 to 2020. Based on Knowledge Discovery from Databases (KDD), the methodology utilizes GLD360 data comprising 79,584,270 records. Analysis reveals a concentration of stroke activity in the northern part of the country. Despite a higher density of negative stroke, the findings show only an average 14% less positive stroke than negative. A crucial consideration for lightning protection systems and insulation coordination applications. There is no apparent correlation between overall stroke activity and positive stroke, and no significant difference in location regarding stroke polarity. However, these findings are not definitive due to data limitations. © 2024 IEEE, © VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.

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Distributed accelerated primal-dual neurodynamic approaches for resource allocation problem

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Science China(Technological Sciences) 2023年第12期66卷 3639-3650页

作者： ZHAO You HE Xing YU JunZhi HUANG TingWen College of Electronic and Information Engineering Southwest UniversityChongqing 400715China State Key Laboratory for Turbulence and Complex Systems Department of Advanced Manufacturing and RoboticsCollege of EngineeringPeking UniversityBeijing 100871China Science Program Texas A&M University at QatarDoha 2387Qatar

This paper investigates two distributed accelerated primal-dual neurodynamic approaches over undirected connected graphs for resource allocation problems(RAP)where the objective functions are generally *** the help of projection operators,a primal-dual framework,and Nesterov's accelerated method,we first design a distributed accelerated primal-dual projection neurodynamic approach(DAPDP),and its convergence rate of the primal-dual gap is O(1/(t^(2)))by selecting appropriate parameters and initial ***,when the local closed convex sets are convex inequalities which have no closed-form solutions of their projection operators,we further propose a distributed accelerated penalty primal-dual neurodynamic approach(DAPPD)on the strength of the penalty method,primal-dual framework,and Nesterov's accelerated *** on the above analysis,we prove that DAPPD also has a convergence rate O(1/(t^(2)))of the primal-dual *** with the distributed dynamical approaches based on the classical primal-dual framework,our proposed distributed accelerated neurodynamic approaches have faster convergence *** simulations demonstrate that our proposed neurodynamic approaches are feasible and effective.

关键词： accelerated primal-dual neurodynamic approaches RAP projection operators penalty method convergence rate O(1/(t^(2)))

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Electrocatalysis for sustainable nitrogen management: materials innovation for sensing, removal and upcycling technologies

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Science China Chemistry 2025年第6期 2322-2342页

作者： Mei Yi Hongmei Li Minghao Xie Panpan Li Zhaoyu Jin Guihua Yu Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China College of Materials Science and Engineering and College of Chemistry Sichuan University Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin

The global nitrogen cycle holds immense importance due to its crucial role in supporting life, supplying vital nutrients for plant growth, preserving environmental balance, and enabling the proper functioning of ecosystems. However, human activities frequently disrupt this cycle, leading to the accumulation of nitrates and nitrites in water bodies. This accumulation causes environmental pollution and health risks. Traditional methods for treating nitrogen pollution, including biological, physical, and chemical approaches, have inherent limitations. In recent years, electrocatalysis has emerged as a promising and sustainable approach for nitrogen management. This technology offers superior efficiency, high selectivity, and environmental *** not only enables accurate detection of nitrogen pollutants in the environment but also facilitates their conversion into harmless nitrogen gas. Moreover, recent advancements have focused on the upcycling of nitrogen pollutants into valuable compounds,such as ammonia and urea. In this comprehensive review, we showcase the applications of electrocatalysis in sustainable nitrogen management. Specifically, we highlight its use in the sensing, removal, and upcycling of major nitrogen pollutants,including nitrate（NO3-）, nitrite（NO2-）, and nitric oxide（NO）. We discuss the use of catalysts, such as Pd alloys, Cu-based, and Fe-based materials, in electrochemical sensing and catalysis. Additionally, we explore recent advancements in the conversion of nitrogen pollutants into valuable compounds like ammonia and urea. The review also addresses current challenges and future opportunities in the field, including innovations in sensor and catalyst design, as well as large-scale treatment strategies. We anticipate that these perspectives will provide profound insights for effective nitrogen pollution control and sustainable utilization of nitrogen resources.

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Optimized PID and NN-based Speed Control of a Load-coupled DC Motor 12

Optimized PID and NN-based Speed Control of a Load-coupled D...

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12th International Conference on Mathematical Modeling in Physical Sciences, IC-MSQUARE 2023

作者： Encalada-Dávila, Ángel Mohamed Ellithy, Kareim Salah Abdelhalim, Mariam Shalaby, Raafat Nile University Giza Egypt MECT Program School of EAS Nile University Giza Egypt Faculty of Electronic Engineering Menofia University MECT Program School of EAS Nile University Giza Egypt

In this work, three control strategies are presented, compared, and discussed, applied on a load-coupled DC motor. The purpose is to control in an optimal way the motor speed in terms of the armature voltage. Two strategies are based on PID control, working on the classical PID controller and the optimized one by using particle swarm optimization (PSO) to tune the PID controller parameters. The other strategy is based on neural networks (NNs) where two NNs are built to model and control the system. Based on the results, all the strategies reach excellent performances, however, in terms of system response characteristics like rising time or settling time the PID-based controllers show faster responses than the NN controller. Moreover, by comparing these results with other studies that are working with an unloaded DC motor and even when the working system is more complex, the obtained results have a better performance. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： DC motors

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The Design and Optimisation of W-Angular Plate on Quadrilateral Surface 1

The Design and Optimisation of W-Angular Plate on Quadrilate...

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1st IEEE International Conference on Communication engineering and Emerging Technologies, ICoCET 2024

作者： Rajan, Riya Letchumi Bin Mohd Nasir, Nashrul Fazli Mamat, Normahira Binti Yahaya, Sahran Bin Tan, Eugene Chin, Lim Chee Meng, Cheng Ee Sharifah Robiah, Che Wan Bin Abdul Kadir, Mohd Rafiq Universiti Malaysia Perlis Biomedical Electronic Engineering Program Faculty of Electronic Engineering and Technology Perlis Malaysia Universiti Sains Malaysia Department of Orthopaedics Kubang Kerian Malaysia Leonix Sdn. Bhd. Batu Maung Malaysia Universiti Malaya Faculty of Engineering Biomedical Engineering Department Kuala Lumpur Malaysia

ISBN: (纸本)9798331504144

This study focuses on the design, optimization, and biomechanical evaluation of a W-angular hip plate intended for the quadrilateral surface of the human pelvis. The W angular configuration is chosen for its potential to enhance stability and load distribution across the complex pelvic anatomy. The primary objective is to investigate and refine the screw insertion technique that maximizes the plate's stability on the quadrilateral surface. This involves evaluating various parameters such as screw placement angles and depths to achieve optimal fixation. Mechanical behavior of the W-angular hip plate is comprehensively assessed under diverse loading conditions simulating activities essential to daily living, including walking, standing, and sitting. The evaluation encompasses the analysis of stress distribution, strain patterns, and deformation characteristics within the implant structure. Both male and female anatomical variations are considered to ensure a thorough assessment of performance across different patient demographics. The outcomes of this study aim to deepen the understanding of how the W-angular hip plate interacts with the pelvic bone and surrounding tissues under realistic conditions. © 2024 IEEE.

关键词： Titanium alloys

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