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共 1074 条记录，以下是41-50 订阅

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Optical Evanescent Field for Direct Observation of Sub-100nm Particle Motion on Glass Surface 1

Optical Evanescent Field for Direct Observation of Sub-100nm...

引用

1st International Conference on Robotics, engineering, Science, and Technology, RESTCON 2024

作者： Khajornrungruang, Panart Permpatdechakul, Thitipat Suzuki, Keisuke Blattler, Aran Terayama, Yutaka Goto, Daiki Phaisalpanumas, Pipat Bun-Athuek, Natthaphon Phunopas, Amornphun Kyushu Institute of Technology Iizuka-Shi Mechanical Science and Technology Division Dept. of Intelligent and Control System Faculty of Computer Science and Systems Engineering Fukuoka Japan Kyushu Institute of Technology Iizuka-Shi Mechanical Information Science and Technology Division Dept. of Interdisciplinary Informatics Graduate School of Computer Science and Systems Engineering Fukuoka Japan King Mongkut's University of Technology North Bangkok Bangsue Faculty of Engineering Dept. of Production and Robotics Engineering Bangkok Thailand Kyushu Institute of Technology Iizuka-Shi Mechanical Science and Technology Course Dept. of Intelligent and Control System Graduate School of Computer Science and Systems Engineering Fukuoka Japan King Mongkut's University of Technology North Bangkok Bangsue Faculty of Engineering Dept. of Industiral Engineering Bangkok Thailand King Mongkut's University of Technology North Bangkok Bangsue College of Industrial Technology Dept. of Mechanical Engineering Technology Bangkok Thailand

ISBN: (纸本)9798350348842

To directly investigate the dynamic nanoscale phenomenon on the surface being processed in wet conditions such as precision polishing, and cleaning in semiconductor industrial, an optical method for visualization and observation of each sub-100 nm sized particle that is moving on an interface such as a silica glass surface by applying an evanescent field have been proposing. Subsequently, we developed an experimental apparatus equipped with an optical microscopy system for verifying the moving particle observation method in a laboratory scale. This article introduces some experimentally direct observation results of duplicated wet processes. © 2024 IEEE.

关键词： Visualization

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Application of Recurrent Neural Networks for Adaptive Selection of Parameters of Error-correcting Code in Telemetry Data Transmission systems 3

Application of Recurrent Neural Networks for Adaptive Select...

引用

3rd International Conference on control systems, Mathematical Modeling, Automation and Energy Efficiency, SUMMA 2021

作者： Bogachev, Ilya Levenets, Alexey Chye, En Un Pacific National University Dept. of Automatic and System Engineering Khabarovsk Russia

ISBN: (纸本)9781665439817

Statement of the problem: Adaptive algorithms for error-correcting coding are mainly used to increase the reliability of data transmission over a noisy communication channel. At the same time, they allow the most optimal use of the channel bandwidth while maintaining the effective transmission rate. Thus, the problem of adaptive selection of the parameters of the error-correcting code in the conditions of the variability of the state of the communication channel is urgent. Purpose of the study: To study the efficiency of the telemetry data transmission system with adaptive selection of the parameters of the error-correcting code based on neural network prediction of the state of the communication channel. Results: The obtained data prove the possibility of effective application of neural network methods for the problem of adaptive selection of parameters of an error-correcting code. This allows more efficient use of the bandwidth of the communication channel in comparison with systems without adaptation. © 2021 IEEE.

关键词： Data communication systems

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Application of Boolean Algebra Methods to the Problem of Measurement Data Compression

Application of Boolean Algebra Methods to the Problem of Mea...

引用

2022 International Siberian Conference on control and Communications, SIBCON 2022

作者： Bogachev, Ilya Levenets, Alexey Chye, En Un Bondarenko, Vladislav Pacific National University Dept. of Automatic and System Engineering Khabarovsk Russia Sholem Aleichem Priamursky State University Dept. of Information Systems Mathematics and Teaching Methods Birobidzhan Russia

ISBN: (纸本)9781665476287

The article describes an approach to reversible compression of measurement data frames. It is based on the representation of the bit-difference type of frames as a truth table of some logical function of several variables, with its subsequent minimization. Based on this approach, a reversible compression algorithm has been developed that allows one to switch from direct data compression to encoding the minimal disjunctive normal form obtained in the process of minimization using adaptive prefix coding. The efficiency of the algorithm was studied on data obtained from a number of energy facilities in the Far East. Which showed that this approach to reversible data compression turned out to be quite effective, regardless of their statistical properties and, in particular, stationarity. © 2022 IEEE.

关键词： Boolean functions

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Robust Adaptive control of Servo systems 19

Robust Adaptive Control of Servo Systems

引用

19th International Conference on Electrical engineering, Computing Science and automatic control, CCE 2022

作者： Morales, Olga Jimenez Maldonado, J. Garrido, R. CINVESTAV-IPN Dept. of Automatic Control. Ciudad de Mexico Mexico Communications Academy IPN-ESIME Dept. of Engineering and Electronics Ciudad de Mexico Mexico

ISBN: (数字)9781665455084

ISBN: (纸本)9781665455084

This paper presents the evaluation of a novel Robust Adaptive control algorithm on a servo system. The main feature of the proposed approach is the use of an updated law based on the e-modification, endowed with a saturation function that maintains the parameter estimates within known lower and upper bounds without resorting on parameter projection techniques. The performance and advantages of the proposed update law compared to the use of a standard updated law based on the e-modification are evaluated. The experimental results highlight the advantages of the proposed robust adaptive controller. In addition, the experiments also show that the use of the proposed update law produces a smooth control signal without large peaks. © 2022 IEEE.

关键词： Parameter estimation

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The Verification of HF Signal Transmission via Grounding system for Online PD Measurement 8

The Verification of HF Signal Transmission via Grounding Sys...

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8th International Conference on engineering, Applied Sciences, and Technology, ICEAST 2022

作者： Srinangyam, Chissanupong Pannil, Pittaya Thungsook, Kittisak Promwong, Sathaporn Nimsanong, Phethai Pattanadech, Norasage School of Engineering King Mongkut's Institute of Technology Ladkrabang Electrical Engineering Dept. Bangkok Thailand School of Engineering King Mongkut's Institute of Technology Ladkrabang Instrumentation and Control Engineering Dept. Bangkok Thailand School of Engineering Rajamangala University of Technology Rattanakosin Electrical Engineering Dept. Bangkok Thailand School of Engineering King Mongkut's Institute of Technology Ladkrabang Telecommunication Engineering Dept. Bangkok Thailand Power System Operation and Control Section 2 Power System Control Dept. Metropolitan Electricity Authority Bangkok Thailand

ISBN: (数字)9781665459198

ISBN: (纸本)9781665459198

This paper discusses signal transmission in the grounding system. During online partial discharge (PD) measurement for the high voltage (HV) apparatus, various PD pulse currents recharge the dielectric of HV apparatus when a PD occurs. One of the noise typologies that affects PD patterns is called the cross-talk, that is, discharges that appear in the measured point due to coupling from another point. In order to study the cross-talk signal, the two PD measuring circuits which are circuit no.1 and circuit no.2, on the same grounding system in the HV laboratory were performed. The distance between two PD measuring circuits is about 20 meters. The artificial PD models were utilized to generate the PD signal injecting to the test circuit no.1, while the cross-talk signals were investigated in circuit no.2. The HFCT sensors were used to measure the PD signal in circuit 1 and the cross-talk signal in circuit 2. The measurement results found that the cross-talk signal transmission in grounding systems provides a bipolar PRPD pattern, and the pulse waveform shows an oscillation shape. Moreover, onsite PD measurements of the generator steam turbine were studied. It is noticeable that the knowledge about cross-talk phenomena in grounding systems can help the PD verification and location for online PD measurement. © 2022 IEEE.

关键词： Partial discharges

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Features of Space Vector Pulse Width Modulation in 5-phases Cascaded High Voltage Converters 5

Features of Space Vector Pulse Width Modulation in 5-phases ...

引用

5th IEEE KhPI Week on Advanced Technology, KhPIWeek 2024

作者： Busher, Victor Chornyi, Oleksii Tytiuk, Valerii Glazeva, Oksana Kuznetsov, Vitaliy Dept. of Electrical Engineering and Electronics National University "Odessa Maritime Academy" Odessa Ukraine Institute of Electromechanics Energy Saving and Automatic Control Systems Kremenchuk Mykhailo Ostrohradskyi National University Kremenchuk Ukraine Kryvyi Rih National University Kryvyi Rih Ukraine Dept. of the electrical engineering Ukrainian State University of Science and Technologies Dnipro Ukraine

ISBN: (纸本)9798350384499

The purpose of this work is to analyze the capabilities of space-vector pulse-width modulation when controlling a 5-phase high-voltage cascade frequency converter in normal mode and several types of emergency situations. Taking into account the large number of controlled power transistors, an asynchronous modulation method is proposed, based on calculating the amplitude values of individual phases at each time based on the duty cycle of space vectors, which allows the control system to use independent switching in each phase. In emergency modes, when individual H-bridges are damaged, it is proposed to use the balanced space vectors method, which ensures the symmetry of the electromagnetic field in the event of a short circuit of both individual cascades and one or two phases of the inverter. Methodology. We use a mathematical and geometric interpretation of variable amplitude space vectors when projecting voltages onto a symmetrical 5-phase load. Results. Analysis of the 1st harmonic of phase voltages showed that the use of the space vector modulation method in the normal operating mode of a 5-phase converter makes it possible to increase the utilization factor of DC voltage sources by 23.1% (instead of 15.6% for a 3-phase converter). If individual H-bridges fail and the voltages in the load phases are balanced, the utilization factor may decrease, but in any case it will remain greater than 1. In this case, the higher harmonics, despite significant distortions in the shape of the phase voltages, are mutually compensated in the electromagnetic field of the load, as evidenced by absence of pulsations and shocks on the graphs of transient processes of the electromagnetic torque of the engine. Balancing of the electromagnetic field in the load is maintained even if one or two phases of the inverter are short-circuited. This significantly increases the survivability of the electric drive, which is especially important in critical mechanisms and technological processes,

关键词： Electric motors

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Blockchain Based Digital Identity Management system for Smart City Services 5

Blockchain Based Digital Identity Management System for Smar...

引用

5th International Conference on Information Technology, Applied Mathematics and Statistics, ICITAMS 2023

作者： Varfolomeev, Alexander A. Al-Farhani, Liwa H. Bmstu Nrnu Mephi Rudn University Dept.Information Security Moscow Russia Rudn University Academy Of Engineering Dept. System Analysis Control And Information Processing Moscow Russia

ISBN: (纸本)9798350335118

Centralized systems that require third parties remain opaque and represent a single point of failure. Therefore, in accordance with the requirements of cloud services and identity management mechanisms, it is necessary to move towards more transparent and collaborative methods. That is, all service providers under the same federation deal positively with the issued identity of the user. The distributed format gives good potential for ID management systems and treats everyone with the same level of validity. This paper presents a blockchain-based identity management system for the purpose of creating a federated identity management system that is used by multiple organizations by Taking advantage of decentralization and high transparency in the blockchain. Several vital advantages of blockchain are positive for forming identity management systems characterized by transparency and high security, and privacy. Implementing the proposed system on a private Hyperledger Fabric blockchain network proved effective according to the criteria studied, and there is also great potential for improvement. The practical application of the proposed system proved high quality and promising possibilities in blockchain based identity management. © 2023 IEEE.

关键词： Blockchain

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Magnification of Performance Operation for Low Voltage DC Microgrids Based on Adaptive Droop control Technique 22

Magnification of Performance Operation for Low Voltage DC Mi...

引用

22nd International Middle East Power systems Conference, MEPCON 2021

作者： Ghalib, M. Ali. Samy, Mohamed Mahmoud College of Technology and Education Beni-Suef University Automatic Control Dept. Egypt Beni-Suef University Faculty of Engineering Automatic Control Dept. Egypt

ISBN: (纸本)9781665419987

Load sharing, circulation current, and bus voltage regulation are the main challenges of parallel converters operation in DC microgrids. For its simplicity, a droop controller is preferred for current sharing control among parallel DC-DC converters. The droop parameter values determine the current sharing error and voltage deviation of parallel DC-DC converters. In this paper, an adaptive and simple adaptive droop controller is proposed, where the droop parameters are estimated online. The proposed algorithm is characterized by low voltage regulation with improved load sharing performance of the DC microgrids. To evaluate the performance of the proposed algorithm, its performance under both the variable input voltage and load resistance is compared to that of a conventional droop controller. Simulation results show the effectiveness of the proposed algorithm over the conventional method. © 2021 IEEE.

关键词： Microgrids

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Predicting the Time from Diagnosis to Treatment in Breast Cancer

Predicting the Time from Diagnosis to Treatment in Breast Ca...

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E-Health and Bioengineering Conference (EHB)

作者： Sergiu Ceică Ştefan-Daniel Achirei Dept. of Computer Engineering Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iasi Iasi Romania

ISBN: (数字)9798331532147

ISBN: (纸本)9798331532154

Recent advancements in machine learning (ML) have significantly impacted the medical field, particularly in diagnosing and treating breast cancer. This study models the time from diagnosis to treatment for breast cancer patients, focusing on delay factors and ML-based solutions. The goal is to develop precise ML models that predict treatment delays, thereby improving the quality and efficiency of medical services. We investigated socio-economic disparities affecting treatment access and developed models to predict these delays. The predictive models used include K-Nearest Neighbors, Decision Trees, Linear Regression, and Boosting Algorithms such as AdaBoost and Gradient Boosting Regressor. By accurately predicting the interval from diagnosis to the first treatment, our work aims to promote equity in healthcare, ensuring timely treatment for all patients. Our findings highlight the potential of ML in optimizing treatment timelines and resource allocation, contributing to improved patient outcomes and advancing the medical system.

关键词： Medical services Predictive models Boosting Prediction algorithms Breast cancer Delays Resource management Socioeconomics Medical diagnostic imaging Regression tree analysis

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Generalized Likelyhood Ratio based Detection on Cyber-Attacks 37

Generalized Likelyhood Ratio based Detection on Cyber-Attack...

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37th Youth Academic Annual Conference of Chinese Association of Automation, YAC 2022

作者： Wu, Hao Zhang, Deyu Dept. of Software Henan University of Engineering Zhengzhou China Institute for Automatic Control and Complex Systems University of Duisburg-Essen Duisburg Germany

ISBN: (纸本)9781665465366

In this paper, a generalized likelihood ratio based detection algorithm with a statistical method for threshold setting is proposed to detect cyber-attacks on a unified remote control architecture. Based on an encoder and a decoder embedded on plant side and remote controller side, respectively, not only additive interrupted signal (only effecting output or input signal), but also multiplicative attack signal could be detected easily. Finally, three numerical examples are provided to validate our proposed scheme. © 2022 IEEE.

关键词： Remote control

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