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arXiv 2021年

作者： Zhang, Wandong Wu, Q.M. Jonathan Yang, Yimin Zhao, W.G. Will Wang, TianLei Zhang, Hui Department of Electrical and Computer Engineering University of Windsor Windsor Canada Department of Computer Science Lakehead University Thunder Bay Canada Vector Institute for Artificial Intelligence Toronto Canada Faculty of Business Administration Lakehead University Canada Artificial Intelligence Group CEGEP de Ste Foy Canada Institute of Information and Control Hangzhou Dianzi University Hangzhou China School of Robotics Hunan University Changsha China

Most multilayer least squares (LS)-based neural networks, such as deep random vector functional link (RVFL), are structured with two separate stages: unsupervised feature encoding and supervised pattern classification. Once the unsupervised learning is finished, the latent encoding would be fixed without supervised fine-tuning. However, in complex tasks such as handling the ImageNet dataset, there are often many more clues that can be directly encoded, while the unsupervised learning, by definition, cannot know exactly what is useful for a certain task. There is a need to retrain the latent space representations in the supervised classification stage to learn some clues that unsupervised learning has not yet learned. In particular, the error matrix from the output layer is pulled back to each hidden layer, and the parameters of the hidden layer are recalculated with Moore-Penrose (MP) inverse for more generalized representations. In this paper, a recomputation-based multilayer network using MP inverse (RML-MP) is developed. A sparse RML-MP (SRML-MP) model to boost the performance of RML-MP is then proposed. The experimental results with varying training samples (from 3 K to 1.8 M) show that the proposed models provide better generalization performance than most representation learning algorithms. Copyright © 2021, The Authors. All rights reserved.

关键词： Signal encoding

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Eddy Current Method in Non-Magnetic Aluminide Coating Thickness Assessment

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Journal of Nondestructive Evaluation 2025年第3期44卷 1-11页

作者： Tytko, Grzegorz Adamczyk-Habrajska, Malgorzata Li, Yong Pengpeng, Shi Kopec, Mateusz Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice44-100 Poland Faculty of Science and Technology University of Silesia Chorzów41-500 Poland State Key Laboratory for Strength and Vibration of Mechanical Structures Shaanxi Engineering Research Centre of NDT and Structural Integrity Evaluation Xi’an Jiaotong University Shaanxi Xi’an China School of Mathematics and Statistics Ningxia University Ningxia Yinchuan750021 China Institute of Fundamental Technological Research Polish Academy of Sciences Pawińskiego 5B Warsaw02-106 Poland

This study investigates the use of eddy current testing (ECT) as a non-destructive technique to evaluate the thickness and structural variations of non-magnetic aluminide coatings on MAR-M247 nickel-based superalloy. Coatings with thicknesses of 20 μm and 40 μm were applied to substrates exhibiting fine, coarse, and columnar grain structures. Using sensors of different geometries, impedance measurements were performed within a frequency range of 11.5 MHz to 12.5 MHz. Results demonstrated the designed sensor’s superior sensitivity, with the highest values of absolute resistance difference significantly exceeding the threshold for reliable distinction due to coating thicknesses or grain structures. The study highlights the impact of eddy current penetration depth and edge effects on the measurement accuracy, emphasizing the need for optimized sensor design and frequency selection. Findings confirm the efficacy of ECT in differentiating coatings of varying thicknesses and substrate structures, offering a reliable tool for quality control in high-temperature applications. © The Author(s) 2025.

关键词： Eddy current testing

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On a Network SIS Model with Opinion Dynamics

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IFAC-PapersOnLine 2020年第2期53卷 2582-2587页

作者： Weihao Xuan Ruijie Ren Philip E. Paré Mengbin Ye Sebastian Ruf Ji Liu School of Mechanical Engineering at University of Leeds UK Division of Decision and Control Systems at KTH Royal Institute of Technology Stockholm Sweden Faculty of Science and Engineering ENTEG University of Groningen Netherlands Center for Complex Networks Research and the Department of Psychology at Northeastern University USA Department of Electrical and Computer Engineering at Stony Brook University USA

This paper proposes a network continuous-time susceptible-infected-susceptible (SIS) model coupled with individual opinion dynamics, where the opinion dynamics models an individual’s perceived severity of illness or perceived susceptibility. The effects of opinion dynamics on the network SIS model are studied by analyzing the limiting behaviors of the system model, equilibria of the system and their stability.

关键词： SIS model opinion dynamics health belief model

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AI and Reading Fluency for Brazilian Portuguese: A Preliminary Study

SSRN

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SSRN 2023年

作者： Rodrigues, Aline Do Nascimento Ribeiro, Gabriela L. Silva, Victor H.A. Carvalho, Wesley S. Ramírez, Miguel A. Alves, Luciana M. Finger, Marcelo Navas, Ana Luiza G.P. Ribeiro, Carlos H.C. Computer Science Division Aeronautics Institute of Technology Praça Mal. Eduardo Gomes 50 SP Sao Jose dos Campos12228-900 Brazil Federal University of Minas Gerais Medicine Faculty Department of Speech Therapy Av. Prof. Alfredo Balena 190 MG Belo Horizonte30130-100 Brazil University of Sao Paulo Escola Politecnica Department of Telecommunications and Control Engineering Av. Prof. Luciano Gualberto trav. 3 158 SP Sao Paulo05508-010 Brazil University of Sao Paulo Institute of Mathematics and Statistics Department of Computer Science Rua do Matao 1010 SP Sao Paulo05508-090 Brazil University of Sao Paulo Escola Politecnica Department of Electronic Systems Engineering Av. Prof. Luciano Gualberto trav. 3 158 SP Sao Paulo05508-010 Brazil School of Medical Sciences of Santa Casa de Sao Paulo Department of Speech Therapy R. Dr. Cesario Motta Jr. 61 SP Sao Paulo01221-020 Brazil

automatic assessment of oral reading fluency — either for completely autonomous operation or as a facilitator for human decision making — is a likely requirement for timely interventions regarding educational policies for Literacy, especially at the initial years of formal Education. Countries with huge populations such as Brazil have a more urgent demand for such automated procedures, considering the scale of the evaluation needs and the disproportional lack of specialized personnel, compared to more advanced countries. Nevertheless, computational methods as educational aids for Literacy evaluation have been developed mainly for English and other languages associated with those high income countries. Therefore there is an obvious need for studies on languages and countries (especially those with large educational populations) that are less developed. We report on a computational model for fluency assessment based on an automatic speech recognizer (ASR) readily available in the software literature, trained via a deep learning model on a publicly available dataset for Brazilian Portuguese. The model was previously trained for ASR purposes, and therefore was not designed for Literacy assessment of children, this aspect was dealt with through a series of pre and post-processing of the audio samples. Extensive comparative results on reading oral fluency for standardized assessment texts considering the proposed automated process compared to a benchmark by human expert annotations showed a high matching for measures on word and word error rates, despite the fact that the learning model did not include samples from the target population. © 2023, The Authors. All rights reserved.

关键词： Computational methods

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Adaptive neural network based dynamic surface control for uncertain dual arm robots

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International Journal of Dynamics and control 2020年第3期8卷 824-834页

作者： Pham, Dung Tien Nguyen, Thai Van Le, Hai Xuan Nguyen, Linh Thai, Nguyen Huu Phan, Tuan Anh Pham, Hai Tuan Duong, Anh Hoai Bui, Lam Thanh Centre for Autonomous Systems University of Technology SydneyNSW2007 Australia Department of Automatic Control Hanoi University of Science and Technology Hanoi10000 Viet Nam University of Paris Saclay Espace Technologique Bat. Discovery - RD 128 - 2e ét Saint-Aubin91190 France School of Electrical and Electronics Engineering College of Urban Works Construction Hanoi10000 Viet Nam Vinh University of Technology Education VinhNghe An Viet Nam School of Electrical and Electronics Engineering Military Industrial College Hanoi10000 Viet Nam University of Lorraine 34 Cours Léopold Nancy54000 France Faculty of Electrical Engineering Hanoi University of Industry Hanoi10000 Viet Nam

The paper discusses an adaptive strategy to effectively control nonlinear manipulation motions of a dual arm robot (DAR) under system uncertainties including parameter variations, actuator nonlinearities and external disturbances. It is proposed that the control scheme is first derived from the dynamic surface control (DSC) method, which allows the robot’s end-effectors to robustly track the desired trajectories. Moreover, since exactly determining the DAR system’s dynamics is impractical due to the system uncertainties, the uncertain system parameters are then proposed to be adaptively estimated by the use of the radial basis function network (RBFN). The adaptation mechanism is derived from the Lyapunov theory, which theoretically guarantees stability of the closed-loop control system. The effectiveness of the proposed RBFN-DSC approach is demonstrated by implementing the algorithm in a synthetic environment with realistic parameters, where the obtained results are highly promising. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Radial basis function networks

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SCADA security: Concepts and recommendations 10th

SCADA security: Concepts and recommendations

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10th International Symposium on Cyberspace Safety and Security, CSS 2018

作者： Ionica, Dragos Pop, Florin Popescu, Nirvana Popescu, Decebal Dobre, Ciprian Faculty of Automatic Control and Computers Computer Science Department University Politehnica of Bucharest Bucharest Romania

ISBN: (纸本)9783030016883

SCADA systems are the computers that control essential, complicated, and often dangerous physical processes, many of which constitute the physical infrastructure critical to modern societies. These physical processes are powerful tools, and their misuse generally has unacceptable consequences. Preventing such abuse is the goal of SCADA security. To understand misuse and how to avoid it, we need some understanding of what a SCADA system is, and how it works under different forms of attacks. These are the primary objectives of this paper. © Springer Nature Switzerland AG 2018.

关键词： SCADA systems

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Media and non-media WebRTC communication between a terrestrial station and a drone: the case of a flying IoT system to monitor parking

Media and non-media WebRTC communication between a terrestri...

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International Workshop/Symposium on Distributed Simulation and Real-Time Applications (DS-RT)

作者： Agnieszka Chodorek Robert R. Chodorek Krzysztof Wajda Faculty of Electrical Engineering Automatic Control and Computer Science Kielce University of Technology Kielce Poland Department of Telecommunications The AGH University of Science and Technology Kraków Poland

In this paper we propose a flying IoT system designed to monitor parking lot. The system is composed of a flying mobile station and a terrestrial station. The mobile station consists of visual monitoring camera associated with air quality monitoring sensors, mounted on a Turnigy SK450 quad copter controlled with Pixhawk autopilot hardware. Data gathered from the monitoring system are transmitted to an IoT broker running on a Raspberry Pi 3+ microcontroller, also mounted on a drone, that aggregates data into a common flow and retransmits them to the terrestrial station. The transmission system was build according to WebRTC architecture. In order to assure separation of the production network (for transmission of application data) and the management network (for management and control purposes), two different transmission channels are used: one for the WebRTC transmission and the other for controlling the drone. The paper includes a description of the system and the results of field trials carried out on the parking lot of the AGH University of technology.

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control and decision method for overtaking problem in autonomous vehicles 16

Control and decision method for overtaking problem in autono...

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16th Mini Conference on Vehicle System Dynamics, Identification and Anomalies, VSDIA 2018

作者： Hegedűs, Tamás Németh, Balázs Bede, Zsuzsanna Department of Control for Transportation and Vehicle Systems Faculty of Transportation Engineering and Vehicle Engineering Budapest University of Technology and Economics Stoczek utca. 2 BudapestH-1111 Hungary Systems and Control Laboratory Institute for Computer Science and Control Kende utca 13-17 BudapestH-1111 Hungary

In this paper we deal with an overtaking and lane change strategy for autonomous vehicles. The algorithm is divided into two main layers. The upper layer is responsible for the decision making (e.g lane changing). Before decision-making we predict the motion of other participants and divide the road into discrete sets in each interval, then we compute the probability of occupancy. Considering the state of the motion of ego vehicle we can compute the probability of collision. After assigning a graph points to discrete elements, the probability of collision is ordered to the graph edges, then we determine the route with the smallest cost. The decision-making algorithm is not able to control the vehicle, so it is necessary to design a traceable trajectory for the vehicle. Since we have a series of points to be reached for the future, this can be used as a reference vector for the trajectory design algorithm. One Model Predicitve controller (MPC) is responsible for the design of the trajectory so we can obtain limitations to several states to ensure comfort and security. Extending the algorithm, we can compute the longitudinal movement as well. In this paper the decision-making and the trajectory planning algorithm is presented, and the whole model validated in CarMaker. © 2019 Budapest University of Technology and Economics. All rights reserved.

关键词： Decision making

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Conceptual Foundations of the Use of Formal Models and Methods for the Rapid Creation of Web Applications

Conceptual Foundations of the Use of Formal Models and Metho...

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IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems

作者： Sergii Telenyk Grzegorz Nowakowski Eduard Zharikov Jewhenii Vovk Department of Theoretical Electrical Engineering and Computer Science Faculty of Electrical and Computer Engineering Cracow University of Technology Department of Automatic Control and Information Technology Faculty of Electrical and Computer Engineering Cracow University of Technology Department of Automation and Control in Technical Systems National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

ISBN: (纸本)9781728140704

The problem of the rapid creation of effective web applications of one class using formal means is considered. A conceptual approach to its solution is offered based on an analysis of the peculiarities of the construction of web applications. Our approach is based on defining the standard web application architecture and selecting its components using formal methods in accordance with user requirements. A formal logical system is proposed that uses the design of web applications as a process of outputting a formula specified according to the needs of the user, which defines the schemes of execution of the modules of the system. An important feature of this approach is the ability to visualise the process of designing the system in 3D, which creates the conditions for effective interaction between developers and machine development tools.

关键词： Web-applications Application construction Business processes Mathematical logic web applications Mathematical logic conceptual User needs Developers

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Higher Harmonics and Power in Circuits with LED Light Sources

Higher Harmonics and Power in Circuits with LED Light Source...

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2018 Conference on Electrotechnology: Processes, Models, control and computer science, EPMCCS 2018

作者： Straczynski, Pawel Cislik, Miroslaw W. Department of Electrical Engineering Automatic Control and Computer Science Kielce University of Technology Kielce Poland

ISBN: (纸本)9781538682555

The paper deals with a power measurement methods and higher harmonics in circuit with LED light sources. The laws on the electric power quality in Poland has been presented. Current and voltage waveforms are analysed. The frequency spectrum of the current circuit is presented. The coefficients of power quality were determined and reference to the standard. The powers in the circuit with LED lamps were calculated and analysed. © 2018 IEEE.

关键词： Timing circuits

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