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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Adrian Alexandrescu Andrei Stan Nicolae-Alexandru Botezatu Simona Caraiman Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iasi Iasi Romania

ISBN: (纸本)9781509027217

In a complex real-time application, each module can be independently developed, therefore, different processes need to communicate with each other safely and as quickly as possible. This paper proposes a flexible and efficient solution for handling the inter-process communication and for helping the programmer to quickly create modules that use the producer-consumer paradigm in order to streamline the data flow between the different processes. The communication is performed by means of a first-in first-out circular buffer which is kept in a shared memory area in order to allow quick data transfer between modules. The proposed solution allows the development of complex modularized applications suitable for real-time data processing. We describe the use of the proposed framework in a practical setup practice to as part of a software synchronization mechanism between two acquisition devices: a video capture device and an inertial measurement unit.

关键词： Real-time systems Libraries computer languages Pipelines Operating systems Sockets computers

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An optimization method based on evolutionary computation used for estimating the energy consumption for heating in a building

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical engineering and computer Science 2016年第3期78卷 265-276页

作者： Cǎruţaşiu, Mihail-Bogdan Stegaru, Silvia Cristina Ionescu, Constantin Sluşanschi, Emil Ioan Badea, Adrian Ţǎpuş, Nicolae University Politehnica of Bucharest Faculty of Power Engineering Romania Faculty of Automatic Control and Computer Science University Politehnica of Bucharest Romania Faculty of Power Engineering University Politehnica of Bucharest Romania

Simplified mathematical models that can describe the real behavior of a building with relative small errors can provide useful information about the best operational methods of the HVAC (Heating, Ventilating and Air Conditioning) systems, energy demand for heating and cooling, etc. We developed a simplified mathematical model for computing the energy demand for heating and optimized it with a Genetic Algorithm, in order to minimize the error between the model and real data. The tested period (a month) showed that the optimization method is suitable for this type of applications and the relative error was 0.14 kWh.

关键词： Energy utilization

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Continuous defect prediction: The idea and a related dataset

arXiv

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arXiv 2017年

作者： Madeyski, Lech Kawalerowicz, Marcin Wroclaw University of Science and Technology Faculty of Computer Science and Management Wyb.Wyspianskiego 27 Wroclaw50-370 Poland Opole University of Technology Faculty of Electrical Engineering Automatic Control and Informatics ul. Sosnkowskiego 31 Opole45-272 Poland CODEFUSION Sp. z o.o. Armii Krajowej 16/2 Opole45-071 Poland

We would like to present the idea of our Continuous Defect Prediction (CDP) research and a related dataset that we created and share. Our dataset is currently a set of more than 11 million data rows, representing files involved in Continuous Integration (CI) builds, that synthesize the results of CI builds with data we mine from software repositories. Our dataset embraces 1265 software projects, 30,022 distinct commit authors and several software process metrics that in earlier research appeared to be useful in software defect prediction. In this particular dataset we use TravisTorrent as the source of CI data. TravisTorrent synthesizes commit level information from the Travis CI server and GitHub open-source projects repositories. We extend this data to a file change level and calculate the software process metrics that may be used, for example, as features to predict risky software changes that could break the build if committed to a repository with CI enabled. Copyright © 2017, The Authors. All rights reserved.

关键词： Forecasting

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Pupil detection algorithm based on RANSAC procedure

Pupil detection algorithm based on RANSAC procedure

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International Symposium on Signals, Circuits and Systems (ISSCS)

作者： Radu Gabriel Bozomitu Alexandru Păsărică Robert Gabriel Lupu Cristian Rotariu Eugen Coca Universitatea Tehnica Gheorghe Asachi din Iasi Iasi RO Faculty of Electronics Telecommunication and Information Technology “Gheorghe Asachi” Technical University Iaşi Romania Faculty of Computer Engineering and Automatic Control “Gheorghe Asachi” Technical University Iaşi Romania “Grigore T. Popa” University of Medicine and Pharmacy Iaşi Romania “Stefan cel Mare” University Suceava Romania

In this paper a new pupil detection algorithm based on RANSAC procedure is presented. Unlike other similar algorithms reported in the literature, the proposed algorithm provides higher accuracy, low running time and operates properly in noise conditions and for variable illumination. This algorithm is used in the field of assistive technology in order to communicate with neuromotor disabled people by detecting their gaze direction, and can easily be adapted for other applications, such as PC control using eye-gaze detection.

关键词： Fitting Handheld computers Data models Detection algorithms Real-time systems Cameras Feature extraction

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Optimal distributed control for platooning via sparse coprime factorizations

Optimal distributed control for platooning via sparse coprim...

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2016 American control Conference, ACC 2016

作者： SabǍu, Şerban OarǍ, Cristian Warnick, Sean Jadbabaie, Ali Electrical and Computer Engineering Dept. Stevens Institute of Technology HobokenNJ United States Automatic Control Dept. University Politehnica Bucharest Romania Information and Decision Algorithms Laboratories Faculty of the Computer Science Department Brigham Young University United States Electrical and Systems Engineering Dept. University of Pennsylvania United States

ISBN: (纸本)9781467386821

We introduce a novel distributed control architecture for disturbances attenuation in heterogeneous platoons of linear and time-invariant autonomous agents that inherits the performance achievable by the leader-follower control policies. We provide a Youla-like parameterization for the class of all distributed controllers such that the sparsity constraints are imposed on the controllers' left coprime factors, outlining a new concept of structural constraints in distributed control. The proposed scheme lends itself to optimal controller design via norm based costs, it guarantees string stability and completely eliminates the accordion effect from the behavior of the platoon. The distributed controller is proven to attain global optimality for heterogeneous platoons and H2 costs and can easily reconfigure such as to remain optimal during formation merging/exiting maneuvers. The scheme is amenable to a GPS time base synchronization mechanism, allowing for the exact compensation of the time delays induced by the wireless communications. © 2016 American automatic control Council (AACC).

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Type of Material in the Pipes Overhead Power Lines Impact on the Distribution on the Size of the Overhang and the Tension

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IOP Conference Series: Materials Science and engineering 2017年第2期245卷

作者： Urszula Pawlak Marcin Pawlak Department of Mechanics Metal Structures and Computer Methods Faculty of Civil and Environmental Engineering Kielce University of Technology Kielce Poland Department of Power Engineering Electronics Faculty of Electrical Engineering Automatic Control and Computer Kielce University of Technology Kielce Poland

The article presents the material type from which the conductors of the overhead power lines are produced influences on the size of the overhang and the tension. The aim of the calculations was to present the benefits of the mechanics of the cable resulting from the type of cable used. The analysis was performed for two types of cables: aluminium with steel core and aluminium with composite core, twice span power line section. 10 different conductor-to-strand coil, wind, icing, and temperature variations were included in the calculations. The string description was made by means of a chain curve, while the horizontal component H of the tension force was determined using the bisection method. The loads were collected in accordance with applicable Eurocode.

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GPI-based secrecy rate maximization beamforming scheme for wireless transmission with an-aided directional modulation

arXiv

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arXiv 2017年

作者： Yu, Hai Wan, Simin Cai, Wenlong Xu, Ling Zhou, Xiaobo Wang, Jin Wu, Yongpeng Shu, Feng Wang, Jiangzhou Wang, Jianxin School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing210094 China faculty of National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing Aerospace Automatic Control Institute Beijing China Shanghai Key Laboratory of Navigation and Location-Based Services Shanghai Jiao Tong University Minhang200240 China College of Computer and Information Sciences Fujian Agriculture and Forestry University Fuzhou350002 China School of Engineering and Digital Arts University of Kent CanterburyCT2 7NT United Kingdom

In a directional modulation network, a general power iterative (GPI) based beamforming scheme is proposed to maximize the secrecy rate (SR), where there are two optimization variables required to be optimized. The first one is the useful precoding vector of transmitting confidential messages to the desired user while the second one is the artificial noise (AN) projection matrix of forcing more AN to eavesdroppers. In such a secure network, the paramount problem is how to design or optimize the two optimization variables by different criteria. To maximize the SR (Max-SR), an alternatively iterative structure (AIS) is established between the AN projection matrix and the precoding vector for confidential messages. To choose a good initial value of iteration process of GPI, the proposed Max-SR method can readily double its convergence speed compared to the random choice of initial value. With only four iterations, it may rapidly converge to its rate ceil. From simulation results, it follows that the SR performance of the proposed AIS of GPI-based Max-SR is much better than those of conventional leakage-based and null-space projection methods in the medium and large signal-to-noise ratio (SNR) regions, and its achievable SR performance gain gradually increases as SNR increases. Copyright © 2017, The Authors. All rights reserved.

关键词： Modulation

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Properties of carbide electro-spark coatings after laser processing

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AIP Conference Proceedings 2018年第1期2017卷

作者： Norbert Radek Izabela Pliszka Aneta Gądek-Moszczak Jarosław Rolek Jana Petru 1Kielce University of Technology Faculty of Mechatronics and Mechanical Engineering Al. 1000-lecia Państwa Polskiego 7 25-314 Kielce Poland 2Cracow University of Technology Institute of Applied Informatics Faculty of Mechanical Engineering Al. Jana Pawła II 37 31-864 Cracow Poland 3Kielce University of Technology Faculty of Electrical Engineering Automatic Control and Computer Science Al. 1000-lecia Państwa Polskiego 7 25-314 Kielce Poland 4VSB-TU Ostrava Faculty of Mechanical Engineering Department of Machining Assembly and Engineering Metrology 17. listopadu 15/2172 70833 Ostrava-Poruba Czech Republic

The aim of the study was to determine the influence of the laser processing on the properties of electro-spark coatings. The properties were assessed by analyzing the coating microstructure, X-ray radiation, microhardness, corrosion resistance, porosity and tribological tests. In addition, the paper presents the results of measurements and analysis of electrical pulse during ESD. The tests were carried out on WC-Cu coating (the anode) obtained by electro spark deposition over carbon steel C45 (the cathode) and molten with a laser beam. The coatings were deposited by means of the EIL-8A and they were laser treated with the Nd:YAG. The tests show that the laser-treated electro-spark deposited WC-Cu coatings are characterized by lower hardness and friction force, higher seizure resistance, roughness. The laser treatment process causes the homogenization of the chemical composition, the structure refinement and the healing of microcracks and pores of the electro-spark deposited coatings. Laser treated electro-spark deposited coatings are likely to be applied in sliding friction pairs and as protective coatings.

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Foreword

Lecture Notes in Electrical Engineering

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Lecture Notes in Electrical engineering 2017年 415 LNEE卷 V-VI页

作者： Duy, Vo Hoang Dao, Tran Trong Kim, Sang Bong Tien, Nguyen Tan Zelinka, Ivan Department of Automatic Control Ton Duc Thang University Ho Chi Minh City Viet Nam International Cooperation Research and Training Institute Ton Duc Thang University Ho Chi Minh City Viet Nam Department of Mechanical Design Engineering Pukyong National University Busan Korea Republic of Department of Mechanical Engineering Hochiminh City University of Technology Ho Chi Minh City Viet Nam Faculty of Electrical Engineering and Computer Science VŠB-TUO Ostrava Czech Republic

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Design of a controller for stabilization of spherical robot's sideway oscillations

Design of a controller for stabilization of spherical robot'...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Kacper Landa Adam Krzysztof Pilat Master's student at Automatic Control and Robotics AGH University of Science and Technology Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Cracow Poland

In this study, the dynamics and control aspects of a spherical rolling robot's lateral motion are investigated. An approximate, simplified to a single plane, mathematical model is derived using Lagrange equations to check stability of the system. Utilizing the fusion of sensor data, a precise orientation measurement is achieved. Document focuses on a synthesis of a PID controller reducing sideway oscillations that occur in motion of a spherical robot with internal pendulum mechanism.

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