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arXiv 2018年

作者： Gregorio, Federica Kerner, Joachim Dep. of Information Engineering Electrical Engineering and Applied Mathematics Università degli Studi di Salerno FiscianoSA Italy Department of Mathematics and Computer Science FernUniversität in Hagen Hagen58084 Germany

In this paper we study a particle under the influence of a Lennard-Jones potential moving in a simple quantum wire modelled by the positive half-line. Despite its physical significance, this potential is only rarely studied in the literature and due to its singularity at the origin it cannot be considered as a standard perturbation of the one-dimensional Laplacian. It is therefore our aim to provide a thorough description of the full Hamiltonian in one dimension via the construction of a suitable quadratic form. Our results include a discussion of spectral and scattering properties which finally allows us to generalise some results from [Rob74] as well as [RS78].MSC Codes 81Q10, 81Q37, 81Q80, 81Q35, 47E05, 47D08 Copyright © 2018, The Authors. All rights reserved.

关键词： Number theory

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Characterization of Irregularly-Shaped Objects Using 3D Structured Light Scanning

Characterization of Irregularly-Shaped Objects Using 3D Stru...

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International Conference on Computational science and Computational Intelligence (CSCI)

作者： Adam Hennad Patricia Cockett Lifford McLauchlan Mehrube Mehrubeoglu National Instruments Austin Texas USA Texas A&M University-Corpus Christi Department of Physical and Evironmental Sciences Harte Research Institute TX A&M Univ.-Corpus Christi Corpus Christi Texas USA Dep. of Electrical Engineering and Computer Science Texas A&M Univ.-Kingsville Kingsville Texas USA Department of Engineering TX A&M Univ.-Corpus Christi Corpus Christi Texas USA

ISBN: (数字)9781728155845

ISBN: (纸本)9781728155852

Volume computations are important for the characterization of three-dimensional (3D) objects. In the case of irregularly-shaped objects, volumetric analysis remains challenging due to the missing symmetry in the geometry. 3D scanners provide a solution for digitizing the shape of objects for 3D visualization; however, typical scanners do not provide detailed quantitative information which offers significant advantage in both research and development applications. In this work, tools and operations that utilize digital 3D data captured via a 3D structured-light scanner are investigated to develop algorithms that accurately model and compute the volume of non-uniform objects. Specifically, limpet seashells are utilized to develop the models for volumetric analysis and characterization using MATLAB programming toolboxes after the 3D scans are completed.

关键词： Three-dimensional displays Calibration Solid modeling Mathematical model Computational modeling Matlab Shape

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A Compact 9 GHz Microwave Imaging System

A Compact 9 GHz Microwave Imaging System

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IEEE International Workshop on Electromagnetics, Applications and Student Innovation (iWEM)

作者： Kang-Chun Peng Chiu-Chin Lin Cyuan-Fong Li Cheng-Yuan Hung Yu-Sung Hsieh Dep. of Computer and Communication Engineering National Kaohsiung Univ. of Science and Technology Kaohsiung Taiwan Opto-electronics Equipment Department Metal Industries Research & Development Center Kaohsiung Taiwan

This work develops a compact 9 GHz microwave imaging system. The core of the system is a vector network analyzer (VNA) which utilizes range-correlation architecture to suppress the phase noise of the received signal. To overcome the bottleneck that conventional mixer-based phase detectors have limited phase detection range, a novel quadrature phase detection algorithm is proposed. The experimental results show that the microwave imaging system can well detect the bone image of a chicken wing.

关键词： Microwave imaging Microwave oscillators Microwave antennas Microwave communication

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Adaptive Input-output feedback linearization control of Brushless DC Motor with arbitrary current reference using Voltage Source Inverter 8

Adaptive Input-output feedback linearization control of Brus...

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8th Power Electronics, Drive systems and Technologies Conference, PEDSTC 2017

作者： Shirvani Boroujeni, Mojtaba Arab Markadeh, Gholamreza Soltani, Jafar Dep. of Computer Science and Electronic Shahrekord University Shahrekord Iran Department of Electrical Engineering Khomeinishahr Branch Islamic Azad University Isfahan Iran

ISBN: (纸本)9781509057665

Torque ripple reduction of Brushless DC Motors (BLDCs) with concentrated winding is an attractive subject in variable speed AC drives. In ideal BLDC with trapezoidal back-EMF torque ripple elimination can be achieved using rectangular stator current, while in motors with non-ideal back-EMF, feeding the rectangular current leads to more torque ripple. In this paper at first, a mathematical expression for torque ripple harmonics is done. Then for a non-ideal BLDC motor with known harmonic contents of back-EMF, calculation of desired reference current amplitudes, which are required to eliminate some selected harmonics of torque ripple, is reviewed. In order to inject the reference currents to the motor windings, an adaptive input-output feedback linearization control is proposed, which generates the reference voltages for three phases Voltage Source Inverter (VSI). Also, this method is robust against the motor parameter variations like as stator's resistance and leakage inductance. The effectiveness of the proposed method is evaluated with simulation in the two harmonic selection methods. © 2017 IEEE.

关键词： Brushless DC motors

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A Load Balancing Algorithm for Resource Allocation in IEEE 802.15.4e Networks

A Load Balancing Algorithm for Resource Allocation in IEEE 8...

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IEEE International Conference on Pervasive Computing and Communications

作者： Katina Kralevska Dimitrios J. Vergados Yuming Jiang Angelos Michalas Dep. of Information Security and Communication Technology NTNU Norwegian University of Science and Technology School of Electrical and Computer Engineering National Technical University of Athens Department of Informatics Engineering Technological Education Institute of Western Macedonia Kastoria Greece

ISBN: (纸本)9781538632284

The recently created IETF 6TiSCH working group combines the high reliability and low-energy consumption of IEEE 802.15.4e Time Slotted Channel Hopping with IPv6 for industrial Internet of Things. We propose a distributed link scheduling algorithm, called Local Voting, for 6TiSCH networks that adapts the schedule to the network conditions. The algorithm tries to equalize the link load (defined as the ratio of the queue length over the number of allocated cells) through cell reallocation. Local Voting calculates the number of cells to be added or released by the 6TiSCH Operation Sublayer (6top). Compared to a representative algorithm from the literature, Local Voting provides simultaneously high reliability and low end-to-end latency while consuming significantly less energy. Its performance has been examined and compared to On-the-fly algorithm in 6TiSCH simulator by modeling an industrial environment with 50 sensors.

关键词： Schedules IEEE 802.15 Standard Scheduling algorithms Reliability Resource management Scheduling Computational modeling management of resources Scheduling algorithms Computational modeling Link Load Resource utilization Vote INSTITUTE OF ELECTRICAL AND ELECTRONIC ENGINEERS Internet of things IPv6 Load balancing

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Classification of Hand Movements from EMG Signals using Optimized MLP

Classification of Hand Movements from EMG Signals using Opti...

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International Joint Conference on Neural Networks (IJCNN)

作者： Aron A. Martins Lima Rafael M. Araujo Fábio A. Guidotti dos Santos Victor H. Yoshizumi Fábio K. H. de Barros Danilo H. Spatti Luisa H. B. Liboni Maria E. Dajer Department of Electrical Engineering Federal University of Technology Paraná Cornélio Procópio Brazil Department of Computational Systems University of São Paulo São Carlos Brazil Dep. of Electrical and Computer Engineering Federal Institute of Education Science and Technology of São Paulo Sertãozinho Brazil

The emergence of artificial neural networks (ANNs) caused a great revolution in the knowledge area of pattern-classification and contributed to the fast development of intelligent systems. For an ANN to be effective, its topology parameters must be set up, such as learning rate, number of layers, and number of neurons. Therefore, optimization algorithms can be used to produce more efficient ANNs. In this paper, we propose a genetic algorithm (GA) to better estimate parameters of an ANN applied to the classification of the type, strength, and orientation of different hand movements from electromyography signals. Acquired data signals were first processed with the Wavelet Transform (WT) to extract the most important features. These features were presented to the optimized hybrid intelligent system (HIS) composed of ANNs and the optimization GA. Classification results are promising, presenting accuracy rates above 90% and reliability rate of 98%. These results support the use of HIS in practical applications such as smart prostheses and automatic medical evaluations.

关键词： Electromyography Artificial neural networks Topology Genetic algorithms Wrist Transforms Network topology

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Assessment of spatial and temporal properties of Ka/Q band earth-space radio channel across Europe using Alphasat Aldo Paraboni payload

Assessment of spatial and temporal properties of Ka/Q band e...

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International Journal of Satellite Communications and Networking

作者： Ventouras, Spiros Martellucci, Antonio Reeves, Richard Rumi, Emal Fontan, Fernando P. Machado, Fernando Pastoriza, Vicente Rocha, Armando Mota, Susana Jorge, Flavio Panagopoulos, Athanasios D. Papafragkakis, Apostolos Z. Kourogiorgas, Charilaos I. Fiser, Ondrej Pek, Viktor Pesice, Petr Grabner, Martin Vilhar, Andrej Kelmendi, Arsim Hrovat, Andrej Vanhoenacker-Janvier, Danielle Quibus, Laurent Goussetis, George Costouri, Alexios Nessel, James STFC Rutherford Appleton Laboratory RAL Space Oxford United Kingdom Escola de Enxeñaría de Telecomunicación University of Vigo Vigo Spain Dep. Elect. Telec. e Informática Instituto de Telecomunicações Aveiro Portugal School of Electrical and Computer Engineering National Technical University of Athens Athens Greece Meteorological Department Institute of Atmospheric Physics ASCR Prague Czech Republic TESTCOM Czech Metrology Institute Prague Czech Republic Department of Communication Systems Joef Stefan Institute Ljubljana Slovenia ICTEAM Université catholique de Louvain Louvain-la-Neuve Belgium School of Engineering and Physical Sciences Heriot-Watt University Edinburg United Kingdom Antennas and Optical Communications Branch NASA Glenn Research Center ClevelandOH United States TEC-EFW European Space Agency ESTEC Noordwijk Netherlands

The upcoming migration of satellite services to higher bands, namely, the Ka- and Q/V-bands, offers many advantages in terms of bandwidth and system capacity. However, it poses challenges as propagation effects introduced by the various atmospheric phenomena are particularly pronounced in these bands and can become a serious constraint in terms of system reliability and performance. This paper presents the goals, organisation, and preliminary results of an ongoing large-scale European coordinated propagation campaign using the Alphasat Aldo Paraboni Ka/Q band signal payload on satellite, performed by a wide scientific consortium in the framework of a European Space Agency (ESA) project. The main objective of this activity is the experimental characterisation of the spatial and temporal correlation over Europe of the radio channel at Ka and Q band for future modelling activities and to collect data for development and testing of fading mitigation techniques. © 2019 John Wiley & Sons, Ltd.

关键词： Earth (planet) Fading (radio) Radio waves Satellite communication systems Satellites Aldo Paraboni payload Alphasat ASALASCA ASAPE Fade mitigation techniques Ka band Measurement campaign Q bands Satellite communication services Slant path

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High-Performance Computing (HPC) design to improve the quality of Introduction of Parallel Computing lectures

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IOP Conference Series: Materials science and engineering 2019年第1期462卷

作者： E Alfianto A Sa'diyah F Rusydi I Puspitasari Dep. of Computer System Institut Teknologi Adhi Tama Surabaya Jl Arif Rachman Hakim 100 Surabaya Indonesia. 60111 Dep. of Marine Engineering Politeknik Perkapalan Negeri Surabaya Jl Jalan Teknik Kimia Kampus ITS-Sukolilo Surabaya Indonesia 60117 Theoretical Physics Research Group Dep. of Physics Fac. of Science and Technology Airlangga University Jl. Mulyorejo Surabaya Indonesia 60115 Dep. of the information system Fac. of Science and Technology Airlangga University Jl. Mulyorejo Surabaya Indonesia 60115

High-Performance Computing (HPC) has been created to improve the quality of Pengantar Komputasi Parallel lectures. HPC consists of two PCs with AMD Ryzen 7 processor connected by high-speed LAN. HPC is used to solve problems that students can't practice Parallel Computing because the computer used is not adequate. So it takes a machine that can used together that has many processors, so the problems encountered are resolved. The results obtained, participants can use more than four processors to solve tree problems directly.

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Code recognition by means of improved distance and tuned dictionary

Code recognition by means of improved distance and tuned dic...

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2017 IEEE URUCON, URUCON 2017

作者： De Luise, Maria Daniela Lopez Carrilero, Patricio Tournoud, Marcos Pascal, Andrés Alvarez, Claudia Pescio, Pablo Saad, Ben Raul CI2S Lab Ciudad Autónoma de Buenos Aires Argentina Dep. of Information Systems Engineering UTN Concepción Del Uruguay Entre Ríos Argentina Science and Technology Dep. UADER Concepción Del Uruguay Entre Ríos Argentina

ISBN: (纸本)9781538633977

This paper presents a tuned Intelligent Code Recognition (ICR) model using a self-adapting dictionary, combined with a version of Levenshtein distance for checking word similarity. It is part of a broader project named PTAH (Procesamiento de Trámites con Asistente Hispanohablante), an intelligent chatterbot that uses this ICR to collect knowledge from documents. Due to its critical activity, it is mandatory to get the best result for the image to text conversion. The success in getting information determines the knowledge database quality and therefore the accuracy of the answers upon queries to the chatterbot. A blueprint of the global Project is included as well as the ICR, statistics progression obtained with the sequence of improvements applied to the ICR, and a final analysis of the failures. © 2017 IEEE.

关键词： Open source software

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Wavelet transform based technique for text image localization

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Karbala International Journal of Modern science 2016年第2期2卷 138-144页

作者： Ali, Suhad A. Hashim, Ashwaq T. Babylon University Science College for Women Computer Science Dep. Babylon Iraq Technology University Control and Systems Engineering Dep. Baghdad Iraq

In this paper, a robust technique based on discrete wavelet transform, edge detection, and morphology operation for scene text detection is proposed. There are several stages in the proposed method. In the first stage, a single wavelet decomposition LH, HL and HH subbands are applied for detecting edges in original scene text image. The projection technique is applied in the second stage to preliminary detect text and non-text pixels. In third stage, 4-connected components are applied, and then area geometric feature is used as threshold to remove non-text region. At last stage, morphological operations are applied to connect isolated text components and to remove non-text regions. The proposed method is applied on a various images such as images of low contrast, complex background images and images of different fonts and size of text. The experimental results show that the proposed method can detect regions of the text perfectly. © 2016 The Authors

关键词： Connected components DWT Image projection Morphological operator

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