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Roedunet International Conference (RoEduNet)

作者： Silvia Cristina Stegaru Emil Ioan Sluşanschi Mcolae Ţăpuş Mihail-Bogdan Cărutasiu Constantin Ionescu Adnan Badea Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania Faculty of Power Engineering University Politehnica of Bucharest Bucharest Romania Universitatea din Bucuresti Bucuresti RO

Genetic Algorithms are frequently used to estimate parameters in complex mathematical models. However, it is not always straightforward how the parameters of the genetic algorithm should be set in order to find optimal solutions more efficiently. In this paper we will discuss how the genetic operators, mutation and cross over, influence performance within a parameter estimation program which estimates energy consumption in a Passive House. We have varied them independently of one another and have gained insight on the ways they affect our program and how they should be set in order to maximize performance.

关键词： Decision support systems

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On moment matching of transfer functions and their derivatives

On moment matching of transfer functions and their derivativ...

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European control Conference (ECC)

作者： T. C. Ionescu Orest V. Iftime Department of Automatic Control and Systems Engineering Univ. of Sheffield Sheffield UK Faculty of Economics and Business University of Groningen Groningen The Netherlands

In this paper we study the problem of computing the (family of) reduced order model(s) that satisfy the following properties the systems match the moments of the given to be reduced system and the same property holds for the first order derivatives of the corresponding transfer functions. We prove that such a model exists and compute it. We also study the problem of moment matching for the state-space representations of the first order derivatives of rational transfer functions. Finally, we show that the model that matches the moment of both the given system and its first order derivative is a member of the family of reduced order models whose first order derivatives achieve moment matching.

关键词： Transfer functions Interpolation Mathematical model Reduced order systems Linear systems Computational modeling Time-domain analysis

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Increasing energy efficiency of a building with minimal computational demands using model predictive control

Increasing energy efficiency of a building with minimal comp...

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Roedunet International Conference (RoEduNet)

作者： Giorgian Neculoiu Valentin Sgarciu Alexandru Viorel Marinescu Mariana Marinescu Faculty of Automatic Control and Computers Politehnica University of Bucharest1 Bucharest Romania Laboratory of Automation and Applied Informatics Technical University of Civil Engineering of Bucharest Bucharest Romania

This work is a aggregated perspective of previous papers studying advanced control strategy applicable in intermittently heated buildings. This strategy mainly aims to optimize the energy efficiency of heating systems taking into consideration the minimization of the needful time and the computational resources necessary to this process. Model Predictive control is the control strategy used in this work and the main purpose (ensuring maximum comfort with minimum energy consumption) is satisfied by using weather forecasts and building occupancy program. Several architectures presented can be used to implement the proposed solution. The main goal is to minimize the computational requirements achieving the best performance. To solve the problems from previous studies, this paper studied the solutions implemented on a single thermal zone and multiple thermal zones.

关键词： Decision support systems

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Group Maker Tool for Software engineering Projects

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Procedia - Social and Behavioral Sciences 2015年 203卷 102-108页

作者： Maria-Iuliana Dascalu Ana-Maria Dumitrache Melania Coman Alin Moldoveanu Faculty of Engineering in Foreign Languages University Politehnica of Bucharest 313 Splaiul Independentei Bucharest 060042 Romania Faculty of Psychology and Education Sciences “Alexandru Ioan Cuza” University of Iasi 3 Toma Cozma Iasi 700554 Romania Faculty of Automatic Control and Computers University Politehnica of Bucharest 313 Splaiul Independentei Bucharest 060042 Romania

Project-based learning is widely used in various academic fields. Nevertheless, software engineering projects have a special statute due to their interdisciplinary features. Unlike other academic disciplines, software engineering requires knowledge from diverse engineering areas, but also from system modeling and design, business domain, communication. In order to maximize the learning benefits and to facilitate obtaining successful projects, the teacher has to be actively involved in all the phases of the project life cycle, including team formation. This article presents a new application which implements the collaborative learning paradigm through project-based learning in software engineering. The model automates the process of optimal grouping of students in teams based on a skill inventory created by the teacher. The collected answers related to students’ skills will help the teacher to built the most equilibrate groups in one's class. The grouping is made taking into account various criteria. Once groups are formed, students can collaborate by chatting in the project's forum or by attaching additional files to their project. Preliminary results are provided and discussed in the context of various groupware tools.

关键词： ICT- based solutions for education groupware collaborative learning

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The textile resistive humidity sensor manufacturing via (PVD) sputtering method

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Sensor Letters 2015年第11期13卷 998-1001页

作者： Frydrysiak, Michal Korzeniewska, Ewa Tsiorowski, Lukasz Institute of Textiles Architecture Faculty of Material Technologies and Textile Design Lodz University of Technology Zeromskiego 116 Lodz Poland Institute of Electrical Engineering Systems Faculty of Electrical Engineering Electronics Informatics and Automatic Control Lodz University of Technology Zeromskiego 116 Lodz Poland

The following paper presents the construction of a prototype of the flexible textile resistive humidity sensor, which can be used in textronics clothing applications and can be easy integrated with the fabric. It can be used as a sensor applied to sheets in hospitals or nursing homes, or as a sensor in special medical clothing. The authors describe a method of manufacturing of the sensor via sputtering method (PVD) and present the mechanical and electrical parameters of the textile sensor under different environmental conditions obtained with using measurement and processing autonomic system. The resistance and capacitance of the sensor was examined in the wide range of humidity 20 to 90% at the temperature 30 °C and 40 °C. This paper describe also an apparatus for applying the electroconductive sliver layers on the surface. The authors also presented the right type of textile substrate on which is made the sensor. Microscopic examination of the upper layer of prototype was also presented in the paper. This novel method of creating the sensor for humidity measurement on the flexible textile substrate has not been reported before. Copyright © 2015 American Scientific Publishers All rights reserved.

关键词： Hospitals

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A content based image retrieval approach based on document queries

A content based image retrieval approach based on document q...

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2014 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2014, at WORLDCOMP 2014

作者： Ilie, M. 'Dunarea de Jos' University of Galati Faculty of Automatic Control Computers Electrical and Electronics Engineering Galati Romania

ISBN: (纸本)1601322801

This paper presents a new content based image retrieval (CBIR) approach, which makes use of descriptors originating in the local and global search spaces. The algorithms extracts four colour descriptors, one texture descriptor and two local descriptors which are used to train the corresponding classifiers, based on neural networks. Subsequently, the classifiers are grouped in two weighted majority voting modules, for local and global characteristics. The system is tested on regular images and on document scans obtained from two datasets used a benchmarks in previous conferences, in order to verify the architecture robustness. The experimental results demonstrate the effectiveness of the proposed model. © 2014 CSREA Press.

关键词： Textures

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Adaptive voltage control, integrated function of a numerical transformer protection system

Adaptive voltage control, integrated function of a numerical...

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2014 19th IEEE International Conference on Automation, Quality and Testing, Robotics, AQTR 2014

作者： Constantin, Iulia-Cristina Dragomir, Ionela-Marilena Constantin, Costel Iliescu, Sergiu Stelian Automatic Control and Computers Faculty University 'Politehnica' of Bucharest Bucharest Romania Power Engineering Faculty University 'Politehnica' of Bucharest Bucharest Romania

ISBN: (纸本)9781479937318

The paper presents the local voltage control of a power transformer as a function integrated in a numerical protection system. Because of this modern integration, the voltage control takes advantage of all the benefits that the numerical technology brings: flexibility, adaptive capability, access to data base interface, self monitoring abilities, logical and mathematical abilities etc. The main objective of the paper is to propose an adaptive functionality of the voltage control function, depending on the topology of the substation in which it is operating. For a certain topology a specific reference value of the voltage control function is set. © 2014 IEEE.

关键词： Topology

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Transversal surface wave control by gain switching iterative learning improving research on active turbulent flow control

Transversal surface wave control by gain switching iterative...

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Australian control Conference (AUCC)

作者： Marcel Dueck Dirk Abel Stefan van Waasen Michael Schiek Forschungszentrum Juelich GmbH Electronics and Analytics ZEA-2: Electronic Systems Wilhelm-Johnen-Strabe Juelich Germany Institute for Automatic Control (IRT) RWTH Aachen Aachen Germanv Faculty of Engineering University of Duisburg-Essen Duisburg Germany

Active turbulent flow control for friction drag reduction at high Reynolds numbers (Re > 104) on transportation systems such as airplanes is investigated. The drag reduction is based on transversal surface waves effecting the turbulent boundary layer. For this wave parameter studies are performed in subsonic wind tunnel experiments using an in house developed electromagnetic actuation system for flexible generation of sinusoidal surface waves with amplitudes between 50 and 500 μm. To ensure an amplitude accuracy better than 5% and a real-time parameter switching we evaluated a gain switching iterative learning control for the transversal surface waves. This approach enables efficient and reliable wind tunnel experiments investigating active turbulent flow control.

关键词： Trajectory Surface waves Actuators Iterative learning control Aluminum Mathematical model Force

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Dynamic control of a Walking Robot Using the Versatile Intelligent Portable Robot Platform

Dynamic Control of a Walking Robot Using the Versatile Intel...

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International Conference on control systems and Computer Science (CSCS)

作者： Victor Vladareanu Corina Boscoianu Radu I. Munteanu Hongnian Yu Luige Vladareanu Robotics and Mechatronics Department Romanian Academy Institute of Solid Mechanics Bucharest ROMANIA Department of Automatic Control and Systems Engineering Faculty of Electrical Engineering Technical University of Cluj-Napoca Napoca ROMANIA School of Design Engineering and Computing Bournemouth University Poole UK Bournemouth UK

This paper studies the walking robot hybrid dynamic control in real time in order to increase movement stability of walking robots on flat terrain, with obstacles or uneven ground, at constant or variable walking speed and variable load. The motion trajectory positions of the robot leg end-effect or and joints, reaction forces and the walking robot dynamics are analyzed and the virtual projection method is adopted using the Versatile Intelligent Portable Robot Platform VIPRO. The obtained results lead to higher performance in relation to the walking robots movement possibilities, the real-time robot balance control, gait control and predictable motion control, providing increased mobility and stability, and also the development of new technological capabilities of the control systems.

关键词： Legged locomotion Stability analysis control systems Real-time systems Robot kinematics Dynamics

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On the development of an intelligent system for particulate matter air pollution monitoring, analysis and forecasting in urban regions

On the development of an intelligent system for particulate ...

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

作者： Mihaela Oprea Cornel Ianache Sanda Florentina Mihalache Elia Georgiana Dragomir Daniel Dunea Stefania Iordache Tom Savu Computers and Electronics Department Automatic Control Universitatea Petrol Gaze din Ploiesti Ploiesti RO ITIMF Department Petroleum-Gas University of Ploiesti Ploiesti Romania Faculty of Environmental Engineering and Food Science VALAHIA University of Targoviste Targoviste Romania Centre for Advanced Technologies CTANM POLITEHNICA University of Bucharest Bucharest Romania

The paper presents details on the development of an intelligent system for particulate matter (PM) air pollution monitoring, analysis and forecasting in two pilot cities, Ploiesti and Targoviste, in selected areas near schools, kindergartens and pediatric hospitals. The main purpose of the system is to provide expert early warnings to protect children with health problems. An in-situ PM 10 , PM 2.5 monitoring network was designed and an online PM 2.5 monitoring network is under development for each city. Two case studies of PM air pollution analysis and forecast for the Ploiesti city are described. The PM air pollution analysis, forecasting, and children health impact analysis were made by using techniques from statistics and artificial intelligence.

关键词： Monitoring Air pollution Cities and towns Forecasting Time series analysis Atmospheric measurements Pediatrics

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