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UPB Scientific Bulletin, Series C: Electrical Engineering and computer science 2017年第4期79卷 69-84页

作者： Truicǎ, Ciprian-Octavian Leordeanu, Cǎtǎlin Adrian Computer Science and Engineering Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania

Machine learning algorithms have recently become very popular for different tasks involving data analysis, classification or prediction. They can provide valuable knowledge for very large sets of data and can reach very good accuracy. However, most algorithms are sensitive to the nature of the data sets, as well as different calibrations which can lead to large differences in performance, accuracy or false positives. In this paper, a classification solution for imbalanced data sets containing information about defects of various trees is presented. The experimental results present a comparison that evaluates the classification performance of the Decision Tree, Random Forest, and Extremely Randomized Trees classifiers. The measures used in the comparison take into account weighted accuracy, precision, and recall for binary and multi-class classification.

关键词： Classification (of information)

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Self-Adaptive Video Encoder: Comparison of Multiple Adaptation Strategies Made Simple 12

Self-Adaptive Video Encoder: Comparison of Multiple Adaptati...

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12th IEEE/ACM International Symposium on Software Engineering for Adaptive and Self-Managing Systems, SEAMS 2017

作者： Maggio, Martina Papadopoulos, Alessandro Vittorio Filieri, Antonio Hoffmann, Henry Department of Automatic Control Lund University Sweden Mälärdalen University Sweden Department of Computing Imperial College London United Kingdom Department of Computer Science University of Chicago United States

ISBN: (纸本)9781538615508

This paper presents an adaptive video encoder that can be used to compare the behavior of different adaptation strategies using multiple actuators to steer the encoder towards a global goal, composed of multiple conflicting objectives. A video camera produces frames that the encoder manipulates with the objective of matching some space requirement to fit a given communication channel. A second objective is to maintain a given similarity index between the manipulated frames and the original ones. To achieve the goal, the software can change three parameters: the quality of the encoding, the noise reduction filter radius and the sharpening filter radius. In most cases, the objectives - small encoded size and high quality - conflict, since a larger frame would have a higher similarity index to its original counterpart. This makes the problem difficult from the control perspective and makes the case study appealing to compare different adaptation strategies. © 2017 IEEE.

关键词： Video cameras

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Brain activation and cognitive load during EEG measured creativity tasks accompanied by relaxation music

Brain activation and cognitive load during EEG measured crea...

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2017 International Conference on computer-Human Interaction Research and Applications, CHIRA 2017

作者： Papuc, Dalia Bălan, Oana Dascălu, Maria-Iuliana Moldoveanu, Alin Morar, Anca University Politehnica of Bucharest Faculty of Engineering in Foreign Languages Splaiul Independentei Bucharest313 Romania University Politehnica of Bucharest Faculty of Automatic Control and Computer Science Splaiul Independentei Bucharest313 Romania

ISBN: (纸本)9789897582677

Creativity tasks require specific imagery, memory and semantic processes, as it has been revealed by various neuroscientific studies. There is significant evidence that an increase of spectral power in the EEG alpha band is inter-related with creative ideation as a form of top-down activity. However, any creational task demands a certain level of cognitive load or workload for memory retrieval, mental schemes design, semantic processing, image formation and concept construct. This paper aims to measure cognitive load during a series of divergent thinking creative tasks accompanied by relaxation music, to examine event-related brain activation and raw power measures in the baseline relaxation, alternate uses creative and verbalization stages of the proposed experimental procedure, as well as to study task-related synchronization/desynchronization between these phases. Also, its purpose is to verify whether slow relaxing music influences creativity, with effects in the brainwaves amplitude variations, especially in the alpha (8-12 Hz) frequency band. We concluded that relaxing music induces creativity and causes an increase in the alpha brain waves for innovative ideas generation and verbalization with a diminished level of cognitive load. Copyright © by SCITEPRESS - science and Technology Publications, Lda. All rights reserved

关键词： Neurophysiology

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Mask-aware networks for crowd counting

arXiv

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arXiv 2018年

作者： Jiang, Shengqin Lu, Xiaobo Lei, Yinjie Liu, Lingqiao School of Computer Science University of Adelaide AdelaideSA5005 Australia Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing210096 China School of Automatic Southeast University Nanjing210096 China Control of Complex Systems of Engineering Ministry of Education Nanjing210096 China College of Electronics and Information Engineering Sichuan University Chengdu610064 China School of Computer Science University of Adelaide AdelaideSA5005 Australia

Crowd counting problem aims to count the number of objects within an image or a frame in the videos and is usually solved by estimating the density map generated from the object location annotations. The values in the density map, by nature, take two possible states: zero indicating no object around, a non-zero value indicating the existence of objects and the value denoting the local object density. In contrast to traditional methods which do not differentiate the density prediction of these two states, we propose to use a dedicated network branch to predict the object/non-object mask and then combine its prediction with the input image to produce the density map. Our rationale is that the mask prediction could be better modeled as a binary segmentation problem and the difficulty of estimating the density could be reduced if the mask is known. A key to the proposed scheme is the strategy of incorporating the mask prediction into the density map estimator. To this end, we study five possible solutions, and via analysis and experimental validation we identify the most effective one. Through extensive experiments on five public datasets, we demonstrate the superior performance of the proposed approach over the baselines and show that our network could achieve the state-of-the-art performance. Copyright © 2018, The Authors. All rights reserved.

关键词： Forecasting

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What types of functions may be the Perron function of a diagonal discrete linear time-varying systems?

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IFAC-PapersOnLine 2017年第1期50卷 7445-7449页

作者： Babiarz A. Czornik A. Konyukh A. Niezabitowski M. Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Akademicka 16 St. Gliwice 44-100 Poland Belarus State Economic University Partyzanski praspiekt 26 Minsk 220070 Belarus

In this paper we investigate properties of the Perron exponents of diagonal discrete linear time-varying systems. We give necessary and sufficient conditions for a function / to be the Perron function of the considere... 详细信息

关键词： discrete linear time-varying system Perron exponent Perron function

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Method of programming of sequential control systems using LabVIEW environment

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IFAC-PapersOnLine 2016年第25期49卷 476-481页

作者： Wcislik, Miroslaw Suchenia, Karol Laskawski, Michal S. Faculty of Electric Engineering Automatic Control and Computer Science Kielce University of Technology Poland

The paper deals with the new methodology of programming of sequential control systems in Lab VIEW language. By similarity to the SFC language and use of only a few defined blocks and connections, the proposed approach makes it easy to construct and analyze program of control system. The methodology uses only basic elements of the Lab VIEW language. That is why it may be used in wide variety of control devices including FPGA. © 2016

关键词： control systems Flip flop circuits Block diagrams decoders Graphical languages LabViEW Sequence control

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Influence of ammonium tungstate additive in metallization baths on Ni-Cu-P resistive layer properties 21

Influence of ammonium tungstate additive in metallization ba...

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21st European Microelectronics and Packaging Conference and Exhibition, EMPC 2017

作者： Filipowski, Wojciech Pruszowski, Zbigniew Waczyński, Krzysztof Waczyńska-Niemiec, Natalia Czerwiński, Andrzej Pluska, Mariusz Kulawik, Jan Institute of Electronics Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Institute of Electron Technology Warsaw Poland Institute of Electron Technology Kraków Division Krakow Poland

ISBN: (纸本)9780956808646

The paper concerns research on the impact of ammonium tungstate additive in metallization baths on chemical properties of thin Ni-Cu-P resistive layers produced by means of chemical metallization. Material properties were modified by forming a Ni-Cu-P layer in the presence of tungsten ions. Layers obtained in this manner were examined for possibility of application in production of precision film resistors with a near 0 [ppm/K] temperature coefficient of resistance (TCR). The influence of time of ammonium tungstate introduction into a metallization bath on the Ni-Cu-P resistive layer deposition process has been examined and analyzed. © 2017 IMAPS Europe.

关键词： Metallizing

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Telemetric System for Silesian Greenpower's Vehicle

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IOP Conference Series: Materials science and Engineering 2019年第1期564卷

作者： A Stalica M Błachuta A Baier P Żur A Kołodziej P Konopka M Komander Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Akademicka 16 44-100 Gliwice Poland Silesian University of Technology Faculty of Mechanical Engineering Konarskiego 18B 44-100 Gliwice Poland

The paper presents stages of creating a measurement system for a light-weight electric vehicle of the Silesian Greenpower team. The aim of the work was to design a measuring device and mobile application for drivers and the team. The system itself consists of a measuring device, applications for Android and Windows. The purpose of the device was to provide information about the car in real time. The collected data is saved and displayed on the driver's phone. At the same time, the data is stored in a database, which allows the whole team to observe current parameters. Working of the measurement system has been described in the paper. Screenshots from individual applications, a specification of selected sensors and source code of the created applications have been presented. The summary of the project are graphs showing the smooth operation of the measurement system during races taking place on the Rockingham circuit in the UK.

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The scheme of vertical handover procedure with care-of-address function 1

The scheme of vertical handover procedure with care-of-addre...

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1st Workshop (Summer Session) at the Conference on Information and Telecommunication Technologies and Mathematical Modeling of High-Tech Systems, ITTMM-WSS 2018

作者： Zaripova, Elvira R. Yu. Grebeshkov, Alexander Orlov, Yurii N. Shorgin, Vsevolod S. 6 Miklukho-Maklaya st. Moscow117198 Russia Department of Automatic Telecommunication Povolzhskiy State University of Telecommunications and Informatics 23 Leo Tolstoy str. Samara443010 Russia Department of Kinetic Equations Keldysh Institute of Applied Mathematics Russian Academy of Sciences 4 Miusskaya Sq. Moscow125047 Russia Institute of Informatics Problems Federal Research Center "Computer Science and Control" Russian Academy of Sciences 44-2 Vavilova st. Moscow119333 Russia

We analyze the possibilities of using the cognitive radio standard IEEE 802.22. Temporarily unoccupied channels can be used for transferring information where 3GPP LTE service becomes impossible. The technology is very actual in sparsely populated areas. The current paper offers a complete vertical handover procedure from 3GPP LTE to the cognitive radio network IEEE 802.22 with the IP address preserved for easy user recognition. The procedure includes the authorization phase, registration, authentication and connection. The proposed procedure includes Care-of-Address Function for saving an IP address, which will be useful for mobile users. The main idea of proposed vertical handover procedure is saving of a temporary IP address. The vertical handover procedure based on entities from 3GPP LTE network and target IEEE 802.22 WRAN network. This procedure consist from 45 signaling messages (requests and responses) between mobile terminal, ANDSF function, Service Gateway and Packet Data Network Gateway, Base Station IEEE 802.22 and some other entities. Copyright © 2018 for the individual papers by the papers’ authors.

关键词： Cognitive radio

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Evaluation of e-portal services from an employee satisfaction perspective: The communications directorate as a case study

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

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UPB Scientific Bulletin, Series C: Electrical Engineering and computer science 2017年第3期79卷 19-30页

作者： Al-Shaher, Mohamed Adel 1 College of Science Thi-Qar University Nassiriyah Iraq Faculty of Automatic Control and Computer Science University POLITEHNICA of Bucharest Romania

Decision makers in countries belonging to the Organization for Economic Cooperation and Development (OECD) and even those from non-OECD countries are prioritizing the evaluation of e-portal services. At present, governments are implementing programs to demonstrate the advantages of utilizing information and communication technologies in government administration. Using technology could result in internal efficiency and effectiveness of government actions. Evaluating the performance of the information system can reveal weak and strong points, which could be used in improving the system. For many years, scholars have pushed for assessing user satisfaction as a construct for evaluating such systems. Measuring the performance of the e-Government, which is the core of strategies employed by most Arab countries, could lead to the realization and application of the expected benefits of the system. Nonetheless, despite the popular use of e-Government services and applications worldwide, the assessment of electronic services in Iraq has been neglected in practical and theoretical aspects. Moreover, the new portal in Iraq, which is called "citizen e-Government," has decreased the number of citizens conducting business via electronic transactions. The portal design is complex and not user friendly. To respond to this need, this study assesses "Citizen E-Government Portal," which is a new portal in the Communications Directorate in Thi-Qar, according to employee perspective. The study used five constructs, namely, attractiveness, controllability, helpfulness, efficiency, and learnability, in the evaluation. Our findings revealed several weak points in the proposed e-portal, such as slow speed and unavailability of information needed by users. Hence, introductory explanations are needed to improve the proposed portal to increase user rate.

关键词： Efficiency

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