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2019 Global Conference for Advancement in Technology, GCAT 2019

作者： Arpitha, M.J. Sowmyashree, N. Shashikala, M.S. JSS Science Technology Univ Energy Systems Management Mysuru India JSS Science Technology University Department of Electrical Electronics Engineering Mysuru India

ISBN: (纸本)9781728136943

The quality of power delivering to the consumer is reducing day by day because of semiconductor devices. voltage sag, voltage swell Harmonics are most commonly occurring power quality problems in the distribution system. Dynamic Voltage Restorer( DVR) is the custom power device which can be the best possible solution to make the power system efficient and effective. In this paper a photovoltaic source based DVR is proposed with the combination of nonlinear control techniques of inverter such as artificial neural network and hysteresis voltage controller to restore the voltage in sag, swell and fault conditions that occur in the system with the detailed comparative study of Artificial Neural Network (ANN) controller over hysteresis voltage controller. Modeling and simulation of the DVR is carried out by using MATLAB electrical simulation software. © 2019 IEEE.

关键词： Power quality

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Network Alignment

arXiv

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arXiv 2025年

作者： Tang, Rui Yong, Ziyun Jiang, Shuyu Chen, Xingshu Liu, Yaofang Zhang, Yi-Cheng Sun, Gui-Quan Wang, Wei School of Cyber Science and Engineering Sichuan University Chengdu610065 China Cyber Science Research Institute Sichuan University Chengdu610065 China Key Laboratory of Data Protection and Intelligent Management Ministry of Education Sichuan University Chengdu610065 China Department of Reproductive Technology The Affiliated Hospital of Southwest Medical University Luzhou646000 China Physics Department University of Fribourg Chemin du Musée 3 Fribourg1700 Switzerland Sino-Europe Complex Science Center School of Mathematics North University of China Shanxi Taiyuan030051 China Complex Systems Research Center Shanxi University Shanxi Taiyuan030006 China School of Public Health Chongqing Medical University Chongqing400016 China

Complex networks are frequently employed to model physical or virtual complex systems. When certain entities exist across multiple systems simultaneously, unveiling their corresponding relationships across the networks becomes crucial. This problem, known as network alignment, holds significant importance. It enhances our understanding of complex system structures and behaviours, facilitates the validation and extension of theoretical physics research about studying complex systems, and fosters diverse practical applications across various fields. However, due to variations in the structure, characteristics, and properties of complex networks across different fields, the study of network alignment is often isolated within each domain, with even the terminologies and concepts lacking uniformity. This review comprehensively summarizes the latest advance- © 2025, CC BY-NC-ND.

关键词： Large scale systems

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Examination of appearance conditions of singular stress fields at the vertex and along the side of interface in prismatic butt joint

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Journal of Japan Institute of Electronics Packaging 2020年第2期23卷 155-165页

作者： Miyazaki, Tatsujiro Sato, Keisuke Fujiwara, Takahiro Noda, Nao-Aki Sano, Yoshikazu Energy and Environment Program School of Engineering Faculty of Engineering University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa903-0213 Japan Department of Mechanical Systems Engineering Graduate School of Engineering and Science University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa903-0213 Japan Department of Mechanical Engineering Graduate School of Engineering Kyushu Institute of Technology 1-1 Sensui-cho Tobata-ku Kitakyushu-shi Fukuoka804-8550 Japan

In this paper, we discuss the bad pair condition causing a singular stress at a vertex of the interface in three dimensional (3D) prismatic butt joints in comparison with the bad pair condition along the side. 3D finite element (FE) eigenanalysis is applied to obtain the singular index. We found that the bad pair condition at a vertex is slightly different from the well-known 2D bad pair condition α(α- 2β) > 0 , which can be expressed using Dundurs' parameter (α, β). It should be noted that in most cases the bad pair can be judged by (α, β) except for some cases where the bad pair depends on the material combination even under the same (α, β). To clarify the difference, the bad pair conditions are compared on the (α, β) diagram. For convenience, a simple expression for a bad pair is proposed on the basis of the theoretical consideration, and the validity is confirmed numerically. We also confirm that the bad pair condition along the side of the interface can be expressed using Dundurs' parameter as α(α- 2β) > 0 . © 2020 Japan Institute of Electronics Packaging. All rights reserved.

关键词： Stresses

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Risk profile for E-Rapor services for public high school

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AIP Conference Proceedings 2024年第1期3165卷

作者： Dinar Mutiara Kusumo Nugraheni Tamara Tamara Andi Kurniawan Nugroho Doctoral Program in Information Systems School of Postgraduate Studies Diponegoro University Jl. Prof Sudarto S.H. Tembalang Semarang 50275 Indonesia Department of Electrical Engineering Universitas Semarang Jl. Soekarno-Hatta Tlogosari Semarang Jawa Tengah Indonesia

The Indonesian government has implemented E-Rapor to be employed in Indonesia since 2016. During 2016 until 2022 the usage of E-Rapor has identified some risk issues from the school perspective. Therefore, this research aims to identify the risk of the usage of E-Rapor. The research method for this study is to use a case in one of the public high schools in Jakarta, Indonesia. The usage of E-Rapor started in 2016. The E-Rapor system’s objective is to give easy access to students’ result data (evaluation card) to the central government (DAPODIK), school principals, teachers, and student’s parents. However, the implementation of the E-Rapor system has created some risk However, implementing E-Rapor in Schools has created issues among teachers. Therefore, this research proposes a study to identify the risk of the E-Raport system adopting COBIT 2019. The risk profiles are identified only on the governing E-Rapor in School. The case study research was conducted in SMAN 61 Jakarta. The result shows that types of risks that occur in High School are lack of IT Expertise, lack of Standard Operating Procedures, and issues with E-Rapor usage. After recognizing the risk, this study also proposes a strategy for overcoming the risk. The High School needs to be concerned on the area of Managing Human Resources (APO7), Domain DSS03 (Managing Issues), and Domain DSS05 (Managing Security Services)

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A Normal Distribution Transform-Based Radar Odometry Designed For Scanning and Automotive Radars

arXiv

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arXiv 2021年

作者： Kung, Pou-Chun Wang, Chieh-Chih Lin, Wen-Chieh Graduate Degree Program of Robotics National Chiao Tung University Hsinchu Taiwan Department of Electrical and Computer Engineering National Chiao Tung University The Mechanical and Mechatronics Systems Research Laboratories Industrial Technology Research Institute Hsinchu Taiwan Department of Computer Science National Chiao Tung University Hsinchu Taiwan

Existing radar sensors can be classified into automotive and scanning radars. While most radar odometry (RO) methods are only designed for a specific type of radar, our RO method adapts to both scanning and automotive radars. Our RO is simple yet effective, where the pipeline consists of thresholding, probabilistic submap building, and an NDT-based radar scan matching. The proposed RO has been tested on two public radar datasets: the Oxford Radar RobotCar dataset and the nuScenes dataset, which provide scanning and automotive radar data respectively. The results show that our approach surpasses state-of-the-art RO using either automotive or scanning radar by reducing translational error by 51% and 30%, respectively, and rotational error by 17% and 29%, respectively. Besides, we show that our RO achieves centimeter-level accuracy as lidar odometry, and automotive and scanning RO have similar accuracy. Copyright © 2021, The Authors. All rights reserved.

关键词： Optical radar

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A novel visual attention method for target detection from SAR images

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Chinese Journal of Aeronautics 2019年第8期32卷 1946-1958页

作者： Fei GAO Aidong LIU Kai LIU Erfu YANG Amir HUSSAIN School of Electronic and Information Engineering Beihang UniversityBeijing 100083China Space Mechatronic Systems Technology Laboratory Department of DesignManufacture and Engineering ManagementUniversity of StrathclydeGlasgow G1 1XJUK Cognitive Big Data and Cyber-Informatics(CogBID)Laboratory School of ComputingEdinburgh Napier UniversityEdinburgh EH10 5DTScotlandUK

Synthetic Aperture Radar(SAR) imaging systems have been widely used in civil and military fields due to their all-weather and all-day abilities and various other advantages. However, due to image data exponentially increasing, there is a need for novel automatic target detection and recognition technologies. In recent years, the visual attention mechanism in the visual system has helped humans effectively deal with complex visual signals. In particular, biologically inspired top-down attention models have garnered much attention recently. This paper presents a visual attention model for SAR target detection, comprising a bottom-up stage and top-down *** the bottom-up step, the Itti model is improved based on the difference between SAR and optical images. The top-down step fully utilizes prior information to further detect targets. Extensive detection experiments carried out on the benchmark Moving and Stationary Target Acquisition and Recognition(MSTAR) dataset show that, compared with typical visual models and other popular detection methods, our model has increased ability and robustness for SAR target detection, under a range of Signal to Clutter Ratio(SCR) conditions and scenes. In addition, results obtained using only the bottom-up stage are inferior to those of the proposed method, further demonstrating the effectiveness and rationality of a top-down strategy. In summary, our proposed visual attention method can be considered a potential benchmark resource for the SAR research community.

关键词： Learning strategy Synthetic Aperture Radar(SAR) images Target detection Top-down Visual attention mechanism

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XRepo - Towards an information system for prognostics and health management analysis

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Procedia Manufacturing 2020年 42卷 146-153页

作者： Alfonso Ardila Felipe Martinez Kelly Garces Giacomo Barbieri David Sanchez-Londono Andrea Caielli Laura Cattaneo Luca Fumagalli Department of Systems and Computing Engineering Universidad de los Andes Carrera 1 # 18A - 12 Bogota 111711 Colombia Department of Mechanical Engineering Universidad de los Andes Carrera 1 # 18A - 12 Bogota 111711 Colombia Department of Management Economics and Industrial Engineering Politecnico di Milano P.za Leonardo da Vinci 32 Milano 20133 Italy

In the Industry 4.0 vision, Prognostics and Health management (PHM) is expected to assist domain experts in the generation of maintenance decisions. PHM relies on the processing of data sensed from the manufacturing plant for inferring the future performance of production systems. The acquisition and management of data brings different challenges such as data integration, heterogeneity, search usability and volume. To be best of authors’ knowledge, an information system for sharing maintenance data able to fulfill the aforementioned challenges is not available yet. XRepo is proposed within this paper and faces three of the identified challenges through selected functionality: i) Heterogeneity: stored data is complaint with a standard format that includes the information necessary for performing PHM analysis; ii) Integration: data is uploaded to the repository through files or web services; iii) Search usability: stored data can be filtered by criteria and downloaded. This work is meant to be an initial effort towards the generation of a common information system for PHM analysis.

关键词： Industry 4.0 Prognostics Health management Maintenance Datasets Information System Maintenance Repository

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OTFS based random access preamble transmission for high mobility scenarios

arXiv

引用

arXiv 2020年

作者： Sinha, Alok Kumar Mohammed, Saif Khan Raviteja, P. Hong, Yi Viterbo, Emanuele New Delhi India Department of Electrical Engineering IIT Delhi New Delhi India Bharti School of Telecommunication Technology and Management IIT Delhi New Delhi India Department of Electrical and Computer Systems Engineering Monash University Australia

We consider the problem of uplink timing synchronization for Orthogonal Time Frequency Space (OTFS) modulation based systems where information is embedded in the delay-Doppler (DD) domain. For this, we propose a novel Random Access (RA) preamble waveform based on OTFS modulation. We also propose a method to estimate the round-trip propagation delay between a user terminal (UT) and the base station (BS) based on the received RA preambles in the DD domain. This estimate (known as the timing advance estimate) is fed back to the respective UTs so that they can advance their uplink timing in order that the signal from all UTs in a cell is received at the BS in a time-synchronized manner. Through analysis and simulations we study the impact of OTFS modulation parameters of the RA preamble on the probability of timing error, which gives valuable insights on how to choose these parameters. Exhaustive numerical simulations of high mobility scenarios suggests that the timing error probability (TEP) performance of the proposed OTFS based RA is much more robust to channel induced multi-path Doppler shift when compared to the RA method in Fourth Generation (4G) systems. Copyright © 2020, The Authors. All rights reserved.

关键词： Modulation

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Computational Fluid Dynamics (CFD) Simulation for Designing Mooring Bitts Position at the Barge for Wave Energy Conversion (WEC) 1

Computational Fluid Dynamics (CFD) Simulation for Designing ...

引用

1st International Conference on Renewable Energy Research and Challenge, ICoRER 2019

作者： Syarif Arief, Irfan Aria Pria Utama, I Ketut Hantoro, Ridho Prananda, Juniarko Muhammad Megawan, Alfa Department of Marine Engineering Institut Teknologi Sepuluh Nopember Jl. Teknik Kimia East Java60111 Indonesia Department of Naval Architecture Institut Teknologi Sepuluh November Jl. Teknik Kimia East Java60111 Indonesia Department of Physics Engineering Institut Teknologi Sepuluh Nopember Jl. Teknik Kimia East Java60111 Indonesia Operation and Management of Maritime Systems Hochschule Wismar Philipp-Müller-Straße 14 Wismar23966 Germany

Potential wave energy in Indonesia between 5 kW m-1 to 20 kW m-1 depending on-site location coastline. This research in ocean energy of Wave Energy Conversion (WEC) is wave activated body using the floating or motion hull due to kinetic and momentum energy from an ocean wave. The pendulum movement cause by a floating hull to drive the electric generator. The shape of the hull, displacement, and position point of the mooring line greatly influences the movement of the hull. This paper discusses how to computational fluid dynamics (CFD) simulation can solve and determine the best mooring line position in the hull. Moreover, the shape of the hull at under waterline or drought has slope angle 45, length overall 3 m, breadth 1.5 m, depth 2 m, and draft 0.65 m. One of the boundary conditions in the domain CFD, the direction of a wave from inlet boundary to starboard or port side using regular wave. The position both of mooring bitts are at forwarding perpendicular and after perpendicular. Three-position of mooring bitts that have simulated CFD: under the waterline, (ii) at the waterline, and (iii) up waterline. The result of simulation that the best position of mooring bitts is at the waterline. © The Authors, published by EDP Sciences, 2020.

关键词： Computational fluid dynamics

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Intelligent Power Charging Strategy in Wireless Rechargeable Sensor Network 23

Intelligent Power Charging Strategy in Wireless Rechargeable...

引用

23rd International Computer Science and engineering Conference, ICSEC 2019

作者： Chien, Wei-Che Chang, Yao-Chung Lin, Yu-Shan Lai, Chin-Feng Chao, Han-Chieh National Cheng Kung University Department of Engineering Science Tainan Taiwan National Taitung University Department of Computer Science and Information Engineering Taitung Taiwan National Taitung University Department of Information Science and Management Systems Taitung Taiwan National Dong Hwa University Department of Electrical Engineering Hualien Taiwan

ISBN: (纸本)9781728125442

This paper focuses on charging planning problem in the indoor environment through wireless rechargeable technology to extend the lifetime of Wireless Sensor Networks (WSN). This study proposes a novel charging method that the directional antenna and motor can combine to extend the charging coverage area, and it will be set on the ceiling to reduce interference from the obstacle. Finally, we proposed an intelligent power charging strategy method to design the charging schedule. Simulation result represents that the proposed machine-learning-based method is useful in charging scheduling problem and enhances the lifetime of WSN and stability of the Internet of Things (IoT). © 2019 IEEE.

关键词： Internet of things

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