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International Conference on Environment and Electrical engineering (EEEIC)

作者： Kaibalya Prasad Panda Prabhat Ranjan Bana P. Sanjeevikumar Gayadhar Panda Zbigniew Leonowicz Massimo Mitolo National Institute of Technology Meghalaya Shillong Meghalaya India Aalborg University Esbjerg Denmark Faculty of Electrical Engineering Wroclaw University of Technology Wroclaw Poland School of Integrated Design Engineering and Automation Irvine Valley College CA USA

ISBN: (数字)9781728174556

ISBN: (纸本)9781728174563

design of multilevel inverters (MLIs) using switched-capacitor (SC) is emerging due to suitability in renewable power conversion systems, high-frequency power distribution, etc. Using the SC technique, the number of dc sources can be significantly reduced, and required voltage levels can be created by utilizing the capacitor voltage along with the dc source. In addition to the source reduction, switch count reduction than the conventional MLIs while enhancing the boosting ability is another challenging task. Unlike the SC MLIs presented earlier with a low voltage gain, this paper proposes a new single-source high-gain SC MLI using a reduced number of switches. The proposed topology can synthesize 13-levels in the output utilizing two different modules, i.e., a cross-switched unit and a traditional H-bridge. The capacitors are self-regulated using the integral switching pulse logic used for the switches. The capacitors are charged in parallel and discharged in series to create the required voltage steps. A comparison of the SC MLIs is carried out to confirm the novelty of the proposed topology. The fundamental switching modulation scheme is used to generate the required pulses for controlling the switches. Various simulation tests are conducted to validate the working in a transient environment, and the results are further obtained in real-time using a setup developed in the laboratory.

关键词： Switches Capacitors Topology Boosting Inverters Voltage control Discharges (electric)

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Explicit Abnormality Extraction for Unsupervised Motion Artifact Reduction in Magnetic Resonance Imaging

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IEEE Journal of Biomedical and Health Informatics 2023年第6期29卷 3853-3863页

作者： Yusheng Zhou Hao Li Jianan Liu Zhengmin Kong Tao Huang Euijoon Ahn Zhihan Lv Jinman Kim David Dagan Feng School of Electrical Engineering and Automation Wuhan University Hubei China Department of Neuroradiology University Hospital Heidelberg Heidelberg Germany Vitalent Consulting Gothenburg Sweden College of Science and Engineering James Cook University Cairns QLD Australia Department of Game Design Faculty of Arts Uppsala University Uppsala Sweden School of Computer Science University of Sydney Sydney NSW Australia

Motion artifact reduction is one of the most concerned problems in magnetic resonance imaging. In recent years, deep learning-based methods have been widely investigated for artifact reduction tasks in MRI. As a retrospective processing method, neural network does not cost additional acquisition time or require new acquisition equipment, and seems to work better than traditional artifact reduction methods. In the previous study, training such models require the paired motion-corrupted and motion-free MR images. However, it is extremely tough or even impossible to obtain these images in reality because patients have difficulty in maintaining the same state during two image acquisition, which makes the training in a supervised manner impractical. In this paper, we proposed a new unsupervised abnormality extraction network (UNAEN) to alleviate this problem. Our network realizes the transition from artifact domain to motion-free domain by processing the abnormal information introduced by artifact in unpaired MR images. Different from directly generating artifact reduction results from motion-corrupted MR images, we adopted the strategy of abnormality extraction to indirectly correct the impact of artifact in MR images by learning the deep features. Experimental results show that our method is superior to state-of-the-art networks and can potentially be applied in real clinical settings.

关键词： Magnetic resonance imaging Training Motion artifacts Task analysis Image reconstruction Generators Feature extraction

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Fast generation of high fidelity RGB-D images by deep-learning with adaptive convolution

arXiv

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arXiv 2020年

作者： Xian, Chuhua Zhang, Dongjiu Dai, Chengkai Wang, Charlie C.L. Guangdong Provincial Key Lab of Computational Intelligence and Cyberspace Information School of Computer Science and Engineering South China University of Technology Guangzhou Guangzhou510006 China Faculty of Industrial Design Engineering Delft University of Technology Netherlands Department of Mechanical and Automation Engineering Chinese University of Hong Kong Hong Kong

Using the raw data from consumer-level RGB-D cameras as input, we propose a deep-learning based approach to efficiently generate RGB-D images with completed information in high resolution. To process the input images in low resolution with missing regions, new operators for adaptive convolution are introduced in our deep-learning network that consists of three cascaded modules - the completion module, the refinement module and the super-resolution module. The completion module is based on an architecture of encoder-decoder, where the features of input raw RGB-D will be automatically extracted by the encoding layers of a deep neural-network. The decoding layers are applied to reconstruct the completed depth map, which is followed by a refinement module to sharpen the boundary of different regions. For the super-resolution module, we generate RGB-D images in high resolution by multiple layers for feature extraction and a layer for up-sampling. Benefited from the adaptive convolution operators proposed in this paper, our results outperform the existing deep-learning based approaches for RGB-D image complete and super-resolution. As an end-to-end approach, high fidelity RGB-D images can be generated efficiently at the rate of 22 frames per second. Copyright © 2020, The Authors. All rights reserved.

关键词： Cameras

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Breaking free from PFAS: biocompatible, durable and high-performance octenyl succinic anhydride (OSA)-modified starch/chitosan coating with ZnO for textile applications

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Carbohydrate Polymers 2025年 365卷

作者： Anja Verbič Blaž Stres Ivan Jerman Barbara Golja Ema Žagar Vuk Martinović Petja Logar Gregor Lavrič Anže Prašnikar Blaž Likozar Uroš Novak Ana Oberlintner Department of Catalysis and Chemical Reaction Engineering National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia Jožef Stefan Institute Department of Automation Biocybernetics and Robotics Jamova cesta 39 Ljubljana Slovenia Faculty of Civil and Geodetic Engineering Institute of Sanitary Engineering Jamova 2 Ljubljana Slovenia University of Ljubljana Biotechnical Faculty Jamnikarjeva 101 Ljubljana Slovenia Laboratory for Coating Development Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia Department of Textiles Graphic Arts and Design Faculty of Natural Sciences and Engineering University of Ljubljana Aškerčeva 12 1000 Ljubljana Slovenia Department of Polymer Chemistry and Technology National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia Pulp and Paper Institute Bogišićeva 8 1000 Ljubljana Slovenia

The development of textile coatings as alternatives to per - and polyfluoroalkyl substances (PFAS) is a high priority due to global regulatory efforts aiming to phase out PFAS, driven by alarming environmental contamination and significant human health concerns. To address the urgent need for replacements, this research develops a health-friendly hydrophobic coating for two of the most common textile substrates, cotton and polyester. The developed coating, consisting of chitosan matrix and octenyl succinic anhydride-modified starch in synergy with ZnO, achieved water contact angles up to 132°. A successful transition to industrial application provided a translucent and homogeneous hydrophobic protection, without noticeably affecting the material's physical properties. Maintained or improved mechanical properties, supported by FTIR analysis, indicate a benign coating process that provides fiber reinforcement. Durability is demonstrated through multiple washing cycles without decrease in hydrophobicity, and high abrasion resistance (min. 20,000 cycles), winning against its commercial fluorinated counterpart. The water-repellent properties show stability over a longer period of time (min. 230 days). The biodegradability study confirmed the environmental compatibility as the biopolymer coating decomposed in 8 days. Finally, multivariate statistical analysis determined an optimal coating process to ensure effective integration of the newly developed sustainable coating into textile manufacturing processes.

关键词： Chitosan Octenyl succinic anhydride Modified starch Biopolymer Hydrophobic coating Functional textile

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Novel Non-Isolated Quad-Switched Inductor Double-Switch Converter for DC Microgrid Application

Novel Non-Isolated Quad-Switched Inductor Double-Switch Conv...

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International Conference on Environment and Electrical engineering (EEEIC)

作者： Nikita Gupta Mahajan Sagar Bhaskar Dhafer Almakhles P. Sanjeevikumar Umashankar Subramaniam Zbigniew Leonowicz Massimo Mitolo National Institute of Technology NIT-Hamirpur Himachal Pradesh India Renewable Energy Lab Prince Sultan University Riyadh Saudi Arabia Aalborg University Esbjerg Denmark Faculty of Electrical Engineering Wroclaw University of Technology Wroclaw Poland School of Integrated Design Engineering and Automation Irvine Valley College CA USA

ISBN: (数字)9781728174556

ISBN: (纸本)9781728174563

In DC microgrid, the combination of energy source, especially renewable with the unit for storage and utility load rely heavily upon the electronics power converters. This paper proposes a novel DC to DC converter called Quad-Switched-Inductor Double-Switch (QSI-DS) converter for microgrid voltage step-up applications. The non-isolated topology utilizes Quad-Switched-Inductors network to develop to proposed converter configuration to achieve high voltage gain. Two switches used to control the flow of energy from input to the output of the converter. Reduced voltage stress across the switches and high gain are the merits of the proposed converter in this work. Principle of operation for continuous, and discontinues modes of the suggested converter, also elaborated. Analysis for gain calculation, comparison with recently suggested converters is presented. The theoretical analysis and performance of the suggested topology of converter validated through Simulink model.

关键词： Inductors Capacitors Switches Microgrids Renewable energy sources High-voltage techniques Stress

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Atomization of Reduced Graphene Oxide Ultra-thin Film for Transparent Electrode Coating

Atomization of Reduced Graphene Oxide Ultra-thin Film for Tr...

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2019 IEEE Conference on Sustainable Utilization and Development in engineering and Technologies, CSUDET 2019

作者： Mat Hussin, Mohd Rofei Aishah Mohamad Badaruddin, Siti Azuan Hamzah, Mohd Hilmy Mohd Razali Mohd Nor, Nik Choong, Yuan Piou Yong Wong, Hin Zaman, Mukter Nanotechnology Adv. Device RandD Mimos Berhad Kuala Lumpur Malaysia Mimos Process Engineering RandD Berhad Kuala Lumpur Malaysia Mimos Semiconductor Sdn Bhd Semiconductor Tech. Development Kuala Lumpur Malaysia Nsw Automation Sdn. Bhd. Mechanical Design Engineering Penang Malaysia Multimedia University Faculty of Engineering Cyberjaya Malaysia

ISBN: (纸本)9781728132761

In this research, an atomization process was introduced to deposit carbon-based nanomaterials i.e. graphene oxide (GO) on 200 mm silicon wafer for high volume production of a transparent conductive electrode (TCE). An ultrasonic spray coating process was used to deposit a stable dispersion of graphene oxide in ethanol on silicon and glass substrates. The thickness of the thin films can be controlled within a nanometer-scale with the high uniformity coating process. Functionalization of GO based on thermal reduction in Rapid Thermal Process (RTP) and Plasma Enhanced Chemical Vapour Deposition (PECVD) chambers was performed to make the GO electrically conductive and optically transparent. AFM measurements revealed that the thin film thickness has a strong correlation with the number of spray passes that can be translated into spray volume. It was discovered that the thin films demonstrate a good electrical conductivity with high optical transparency in the visible light. The sheet resistance of the films can be significantly reduced by rapid thermal annealing at a high temperature of up to 1100 °C and reach 5.3 kΩ/sq with a light transmittance of 77.1% at 550 nm wavelength. This is a low-cost solution for high volume production of TCE, which have a high potential for scaling-up. © 2019 IEEE.

关键词： Graphene

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A Novel Robust Attitude Control for Quadrotor Aircraft Subject to Actuator Faults and Wind Gusts

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IEEE/CAA Journal of Automatica Sinica 2018年第1期5卷 292-300页

作者： Yuying Guo Bin Jiang Youmin Zhang School of Information Engineering Southwest University of Science and Technology Mianyang 621010 China College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Mechanical Industrial and Aerospace Engineering and the Concordia Institute of Aerospace Design and Innovation Faculty of Engineering and Computer Science Concordia University Montreal Quebec H3G 1M8 Canada IEEE

A novel robust fault tolerant controller is developed for the problem of attitude control of a quadrotor aircraft in the presence of actuator faults and wind gusts in this ***, a dynamical system of the quadrotor taking into account aerodynamical effects induced by lateral wind and actuator faults is considered using the Newton-Euler approach. Then,based on active disturbance rejection control(ADRC), the fault tolerant controller is proposed to recover faulty system and reject perturbations. The developed controller takes wind gusts,actuator faults and measurement noises as total perturbations which are estimated by improved extended state observer(ESO)and compensated by nonlinear feedback control law. So, the developed robust fault tolerant controller can successfully accomplish the tracking of the desired output values. Finally, some simulation studies are given to illustrate the effectiveness of fault recovery of the proposed scheme and also its ability to attenuate external disturbances that are introduced from environmental causes such as wind gusts and measurement noises.

关键词： Active disturbance rejection control(ADRC) attitude control actuator faults disturbances rejection quadrotor aircraft

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U-model based Control design Framework for Continuous-Time Systems

U-model based Control Design Framework for Continuous-Time S...

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第三十八届中国控制会议

作者： Quanmin Zhu Weicun Zhang Jing Na Bei Sun Department of Engineering Design and Mathematics University of the West of England Frenchy Campus Coldharbour Lane Bristol School of Automation and Electrical Engineering University of Science and Technology Beijing Faculty of Mechanical and Electrical Engineering Kunming University of Science and Technology School of Information Science and Engineering Central South University

This paper expands the discrete-time(DT) U-model set and the associated control designs into continuous-time(CT) U-model expressions to make U-model based control(U-control) feasible for CT systems directly. Consequently, this study has focused on the CT U-model formation and its inversion by graphical implementation in the environment of Simulink/Matlab. It is the U-model to make U-control feasible to establish the model-independent control system design framework with two cascade controllers(invariant controller for generating the desired closed-loop plant output response and the plant dynamic inversion to drive the plant model as a unit constant gain). In the design, the invariant controller is designed once-off within a linear feedback loop for specifying the whole system performance, and the real controller output is determined by the dynamic inversion of plant model together with the desired control. Three simulated CT U-control examples demonstrate the proposed U-control design procedure and application reference for potential readers/users with their future ad-hoc research development.

关键词： DT/CT U-model U-model based control U-control dynamic inversion simulation demonstrations

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Automatic Classification System by Color of Plastic Bottle Caps (SISAC)

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IOP Conference Series: Materials Science and engineering 2020年第1期844卷

作者： H. A. Rodriguez-Arias A. Mendoza-González Research Group in Robotics Automation Telecommunications Electricity Electronics and Computation. (GIRATEC) Faculty of Engineering Sciences Antonio de Arevalo University Foundation Cartagena Colombia Research Group in Architecture Design and Engineering (GIADI) Faculty of Engineering and Architecture Colegio Mayor de Bolivar Technological Institution Cartagena Colombia.

The following project presents an autonomous system of classification of objects by colors which it is applied to the caps of plastic bottles, emulating an automated work cell, which serves to students to know the operation of industrial processes, from construction, programming and even maintenance point of view. The entire project consists of the design of a conveyor system which has a sensor to identify colors, and actuators which allow the caps are correctly classified in the containers according to its color. The work cell was built in a modular way in such a way that in the future it can be adapted to other work cells and simulate flexible manufacturing cells, since it can be reprogrammed not only to identify by colors but also by sizes. Besides, the pieces were built using the 3D printer and the laser cutter in order to use the tools of the laboratories of our institution in the construction of elements for future laboratory equipment which will strengthen the electromechanical program.

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Atomization of Reduced Graphene Oxide Ultra-thin Film for Transparent Electrode Coating

Atomization of Reduced Graphene Oxide Ultra-thin Film for Tr...

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IEEE Conference on Sustainable Utilization and Development in engineering and Technology (STUDENT)

作者： Mohd Rofei Mat Hussin Siti Aishah Mohamad Badaruddin Mohd Hilmy Azuan Hamzah Nik Mohd Razali Mohd Nor Yuan Piou Choong Hin Yong Wong Mukter Zaman Nanotechnology & Adv. Device R&D MIMOS Berhad Kuala Lumpur Malaysia Process Engineering R&D MIMOS Berhad Kuala Lumpur Malaysia Semiconductor Tech. Development MIMOS Semiconductor Sdn Bhd Kuala Lumpur Malaysia Mechanical Design Engineering NSW Automation Sdn. Bhd. Penang Malaysia Faculty of Engineering Multimedia University Cyberjaya Malaysia

ISBN: (数字)9781728132761

ISBN: (纸本)9781728132778

关键词： reduced Graphene Oxide spray coating atomization process transparent conductive electrode rapid thermal process

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