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International Youth Conference on Radio Electronics, Electrical and Power engineering (REEPE)

作者： Bader N. Alajmi Ibrahim Abdelsalam Mostafa I. Marei Nabil A. Ahmed Electrical Engineering Technology Department College of Technological Studies Shuwaikh Kuwait Electrical and Control Engineering Dep. College of Engineering & Technology. Arab Academy for Science Technology & Maritime Transport Cairo Egypt Electrical Power and Machines Department Faculty of Engineering Ain Shams University Cairo Egypt

This paper presents a universal off-board charger for electrical vehicles (EVs), that can charge different categories of EVs, from light low-voltage EVs to heavy high-voltage EVs. The proposed off-board battery charger is based on an interleaved AC-DC converter such that each supply phase is connected to an interleaved buck-boost converter through an isolating transformer followed by a bridge rectifier. To ensure of stable operation of the proposed charger, the control strategy contains three flowed control loops. The outer loop is to regulate the charger output voltage. While the middle-cascaded loop is for battery charging current control, the last control loop is used to ensure that the grid current is sinusoidal at the unity power factor. The performance of the off-board battery charger and its capability to operate as a level ‘3’ charger with a wide voltage range is tested using PSCAD/EMTDC simulation software.

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Stability analysis and sliding mode control of a single spherical bubble dynamics

Stability analysis and sliding mode control of a single sphe...

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American control Conference

作者： Mahmoud Najafi Masoumeh Azadegan Mohammad Taghi Beheshti Mathematical science Kent State University OH USA Systems Life Sciences and Control Engineering (Sylicon) Lab. Tarbiat Modares University Tehran Iran Dep. of ECE. Tarbiat Modares University (TMU) Tehran Iran

ISBN: (纸本)9781467386838

The goal of the present paper is to apply control techniques to determine the Blake cavitation threshold for adiabatic bubbles. Considering state space representation of Rayleigh-Plesset (RP) equation, a stability condition is derived to predict the threshold for cavitation which was determined beforehand by mechanical bias. Moreover, sliding mode control has been utilized to regulate the radius of a single spherical bubble to the desired value to prevent collapse occurrence which has a great importance in some industrial applications. Simulation results are presented to show the effectiveness of the proposed method.

关键词： Stability analysis Mathematical model Thermal stability Analytical models Sliding mode control Liquids Numerical stability Variable structure systems Stability analysis Numerical stability ANALYSIS MODELS liquids Mathematical Model thermal stability bubbles State-space Representation CAVITATION

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Forecasting of Monkeypox Cases Using Optimized SARIMAX Based Model

Forecasting of Monkeypox Cases Using Optimized SARIMAX Based...

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Electronic engineering (ICEEM), International Conference on

作者： Mahmoud Elshabrawy Marwa M. Eid Abdelaziz A. Abdelhamid El-Sayed M. El-Kenawy Abdelhameed Ibrahim Dept. of Communications & Electronics Delta Higher Institute of Engineering and Technology Mansoura Egypt Faculty of Artificial Intelligence Delta University for Science and Technology Mansoura Egypt Dep. of Computer Science Faculty of Computer and Information Sciences Ain Shams University Cairo Egypt Computer Engineering and Control Systems Dept. Faculty of Engineering University Mansoura Egypt

This study presents a dipper-throated-based ant colony optimization (DTACO) with the Seasonal Auto-Regressive Integrated Moving Average with eXogenous factor (SARIMAX) model (DTACO+SARIMAX) to forecast monkeypox cases. The work optimizes the SARIMAX model using grid search cross-validation and fine-tunes its hyperparameters using DTACO to improve prediction accuracy. The suggested model's consistency and accuracy are considerable compared to previous studies. Comparisons with state-of-the-art models validate the proposed model's predictions. DTACO+SARIMAX can be used to control disease and monitor monkeypox. Healthcare organizations and governments can better manage and track the pandemic's course by offering accurate predictions, reducing public panic, and enabling effective pandemic planning. The Analysis of Variance (ANOVA) and Wilcoxon signed-rank tests are conducted on the proposed DTACO-SARIMAX model and compared models.

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Steady‐state security evaluation of electrical power systems by means of artificial neural network

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European Transactions on Electrical Power 1995年第2期5卷 91-97页

作者： Chiodo, E. Menniti, D. Testa, A. Picardi, C. Elio Chiodo (1959) received the degree in Electronics Engineering in 1985 and the Ph.D. degree in Computational Statistics both from the University of Naplefltaly. He is a Researcher at the Department of Electrical Engineering of the University of Naples and a member of the Italian Statistical Society. His areas of interest include probabilistic methods applied to electric power systems analysis. (University of Naples Fedrrico 11. Electrical Engineering Dept.via Claudio 21 1-80125 Naplefltaly T +3981/7683226 Fax+3981/2396897) Daniele Menniti (1958) received the degree in Electrical Engineering from the University of Calabria. Cosenzataly and the Ph.D. degree in Electrical Engineering from the University of NapleslItaly in 1984 and 1989 respectively. He is a researcher at the Electronic. Computer and Systems Science Department of the University of Calabria. Italy. Hiscurrent research interests concern electric power system analysis real-time control and automation. (University of Calabria Electronic Computer and Systems Science Dep. Arcavacataji Rende (CS). 1-87036 CosenzdItaly T +39984/494707. Fax +39984/4947 13) Alfredo Testa (1950) received the degree in Electrical Engineering from the University of Naples/Italy in 1975. He is an Associate Professor in Electrical Power Systems at the Department of Electrical Engineering of the University of Naples. He is engaged in researches on electrical power systems reliability and harmonic analysis. (University of Naples Federico 11. Electrical Engineering Dep. via Claudio '2 1 1-80 I25 NapleslItaly T + 39 8 I/7 68 3'2 11. Fax+3981/2396897) Ciro Picardi (1949) received the degree in Electronics Engineering from the University of Naples/Italy in 1975. He is currently Associate Professor in Process Control at the Department of Electronic Computer and System Science of the University of Calabria. Italy. His current research interests are in the area of electrical drives robotics neural networks and fuzzy control. (University of Calabria Electronic. Compu

An artificial‐neural‐network (ANN) application for steady‐state security evaluation of electrical power systems is presented. Such application is based upon a combined use of a multilayer back‐propagation neural network and of an opportune electrical system model, previously proposed by some of the authors. In the paper, the definition of steady‐state security and the problems arising from its on‐line evaluation are briefly recalled. Then, the ANN utilized is described with particular reference to the solutions adopted by the authors. Afterwards, some remarks on the system model utilized are reported. Finally, numerical applications on the AEP‐14 bus system are presented and the results obtained with different ANN configurations are analyzed. Copyright © 1995 John Wiley & Sons, Ltd.

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SSAM: A Haskell Parallel Programming STM Based Simple Actor Model

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Journal of Physics: Conference Series 2020年第1期1566卷

作者： Y Kim J Cheon T Hur S Byun G Woo Dep. of Electrical and Computer Engineering Pusan National University Dep. of Computer Science Kyungsung University Smart Control Center of LG Electronics

As computers with manycore architecture are being widely spread, parallel programming becomes a pending issue. While parallel programming has been a challenging issue, Haskell is known to be of the best available one. The immutability and declarative nature of Haskell suit well the need for parallelism. In our previous work, we implemented the SAM, a parallel programming model based on Haskell. In this paper, we propose the SSAM, an updated version of SAM, by solving the performance overhead of SAM socket. We discuss the architecture of SSAM and its major functions and show the 14% scalability upgrade in a performance test.

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An Analysis of Haskell Parallel Programming Model in the HaLVM

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Journal of Physics: Conference Series 2020年第1期1566卷

作者： Junseok Cheon Yeoneo Kim Taekwang Hur Sugwoo Byun Gyun Woo Dep. of Electrical and Computer Engineering Pusan National University Dep. of Computer Science Kyungsung University Smart Control Center of LG Electronics

Recently, cloud computers are widely used due to the development of computing environment and network speed. Unikernel is considered to be an attractive operating system in the manycore environment that effectively provides cloud computers. HalVM is a unikernel coded in Haskell. In this paper, we analyze the performance of Haskell running in a unikernel, which has shown good parallel programming performance in a manycore environment. In this paper, we analyze the performance of Haskell running in a unikernel, while Haskell has shown good performance in a manycore environment. To do this, we select HaLVM as the target operating system and analyze the performance by testing various Haskell parallel programming models. Test result shows that HaLVM is scalable only on IVC. We also implement a library to make programming with IVC more convenient, and use this library to compare extensibility experiments. Our test shows HaLVM's scalability is 112.42% higher than Linux environment.

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Sound focused personal audio system design: Performance improvement in acoustic contrast control by spatial weighting for obtaining spatially averaged acoustic potential energy

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The Journal of the Acoustical Society of America 2008年第5_SUPPLEMENT期123卷 3652-3652页

作者： Jin‐Young Park Ji‐Ho Chang Chan‐Hui Lee Yang‐Hann Kim Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea jypark1979@kaist.ac.kr Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea chang.jiho@*** Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea Chance99@kaist.ac.kr Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology 4114 Department of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea yanghannkim@kaist.ac.kr

In acoustic contrast control [J.‐W. Choi and Y.‐H. Kim, J. Acoust. Soc. Am. 111. 1695 (2002)], spatially averaged acoustic potential energy is used as a representative spatial parameter because acoustic contrast control aims to maximize spatially averaged acoustic potential energy ratio between acoustically bright and dark zone. Therefore, spatial averaging process should be concerned carefully because control performance is sensitive to how to determine bright and dark zone. We have already got successful result in feasibility study for personal audio system with over 20dB difference between bright (frontal) and dark (side) zone [C.‐H. Lee et al., J. Acoust. Soc. Am. 111, 3053 (2007)], without any spatial weighting in spatial averaging of acoustic potential energy. Recently, we're trying to improve the control performance by giving spatial weighting in spatial averaging process because how to give spatial weighting has to do with the improvement of control performance to satisfy the original purpose of personal audio system more closely. In this paper, it will be covered the investigation for how to give spatial weighting in averaging process and shown experimental evaluations for a sound focused personal audio system. [Supported by the Korea science and engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of science and Technology (M10500000112‐05J0000‐11210)]

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Learning analytics trends and challenges in engineering education: SNOLA special session

Learning analytics trends and challenges in engineering educ...

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2018 IEEE Global engineering Education Conference - Emerging Trends and Challenges of engineering Education, EDUCON 2018

作者： Rodriguez, Manuel Caeiro Gonzalez, Miguel Angel Conde Alvarez, Ainhoa Larranaga, Mikel Mones, Alejandra Martinez Munoz-Merino, Pedro J. Hernandez-Garcia, Angel Pastor, Rafael Cruz-Benito, Juan Munoz, Salvador Ros Guenaga, Mariluz Departamento de Enxeñaría Telemática Universidade de Vigo Vigo Spain Área de Arquitectura y Tecnología de Computadores Universidad de León Spain Departamento de Lenguajes y Sistemas Informáticos Euskal Herriko Unibersitatea UPV/EHU Spain Departamento de Informática Universidad de Valladolid Spain Departamento de Ingeniería Telemática Universidad Carlos III de Madrid Spain Dep. Ing. de Organización Adm. de Empresas y Estadística Universidad Politécnica de Madrid Spain Departamento de Sistemas de Comunicación y Control Universidad Nacional de Educación A Distancia Spain GRIAL Research Group Computer Science Department University of Salamanca Spain Faculty of Engineering Universidad de Deusto Spain

ISBN: (纸本)9781538629574

SNOLA is a Thematic Network of Excellence recognized by the Spanish Ministry of Economy and Competitiveness composed of the main Spanish researchers in the field of learning analytics. This network emerged in 2013 focusing mainly on the technology underlying learning analytics development, but also interested on the integration of other views and disciplines that give the network a wider scope. During these years, SNOLA has carry out numerous actions with the goal of promoting the collaboration on this field, the diffusion of knowledge and initiatives, the collection of resources and the provision of broad support. Remarkable examples of these efforts have been LASI Spain events, workshops at TEEM conferences or the numerous webinars. In this case, the EDUCON 2018 has given us the opportunity to organize this special session where 5 papers have been selected for presentation. © 2018 IEEE.

关键词： Learning systems

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Sound localization in multiple regions: theory and applications

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The Journal of the Acoustical Society of America 2008年第5_SUPPLEMENT期123卷 3652-3652页

作者： Yang‐Hann Kim Ji‐Ho Chang Jin‐Young Park Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology 4114 Department of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea yanghannkim@kaist.ac.kr Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea chang.jiho@*** Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea jypark1979@kaist.ac.kr

It is often required to have several listening zones, which allows us to have different sounds that we select. For example, in a room, someone wants to listen sound from TV set, and other wants to listen music. In a car, a driver might wants to hear the information coming from his/her navigator system, and the passenger at the back side wants have a quiet zone so that he/she can sleep. To accomplish this kind of acoustic zones, we need to generate multiple sound zones by using multiple speakers. The performance has to be evaluated in accordance with how well one can listen the sound that is expected to have. We proposed to maximize the acoustic contrast between the zones that are defined. The basic concept associated with this approach was proposed by Choi and Kim [J. Acoust. Soc. Am., Vol.111(4), 1695‐1700, Apr. 2002.], but this paper extend this fundamental idea to multiple zone cases. Theoretical formulation which shows what we have proposed is well addressed and several practical cases, including car audio system will be demonstrated. [This work was supported by the Korea science and engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of science and Technology (M10500000112‐05J0000‐11210)]

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Personal sound system design for mobile phone, monitor, and television set: cylindrical shape approach

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The Journal of the Acoustical Society of America 2008年第5_SUPPLEMENT期123卷 3643-3643页

作者： Ji‐Ho Chang Jin‐Young Park Yang‐Hann Kim Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea chang.jiho@*** Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology Dep. of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea jypark1979@kaist.ac.kr Center for Noise and Vibration Control Korea Advanced Institute of Science and Technology 4114 Department of Mechanical Engineering Guseong‐dong Yuseong‐gu 305‐701 Daejon Republic of Korea yanghannkim@kaist.ac.kr

Personal sound system that focuses sound on the user and reduces in the other zone has great interest in these days because it has significant needs to be applied in personal devices such as mobile phone, monitor, and television set. We have shown the feasibility of the personal sound system using a line array of loudspeaker units [C.‐H. Lee et. al., J. Acoust. Soc. Am., 122, 3053 (2007)] based on acoustic contrast control [J.‐W. Choi, Y.‐H. Kim, J. Acoust. Soc. Am. 111, 1695(2002)], with the successful result of about 20dB difference between the front and the side region for 800‐5kHz range. Continuing this research, we try to apply acoustic contrast control in cylindrical shape instead of two‐dimensional planar shape that was used before in order to reduce the level of side lobes more. That is, acoustically bright zone and dark zone are determined as cylindrical shape surrounding the array of loudspeakers. Computer simulation and experimental result will be addressed and evaluated by comparing to the previous result. (This work was supported by the Korea science and engineering Foundation(KOSEF) through the National Research Lab. Program funded by the Ministry of science and Technology(M10500000112‐05J0000‐11210).)

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