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International Conference on Cognitive Infocommunications (CogInfoCom)

作者： Attila Hideg László Blázovics Bertalan Forstner Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781509026463

The research area of uniform dispersal focuses on the minimal capabilities required by mobile robots to solve the problem. Consider the uniform dispersion problem in an unknown connected space which is decomposed into smaller cells. Autonomous robots are injected through an entry point and has to occupy all the cells while avoiding collisions. These robots are considered "weak" in terms of hardware capabilities. They have limited memory, visibility and communication range. When the robots do not have any persistent storage (i.e. without any memory of past positions or actions) they are called oblivious. This paper presents a method which enables oblivious robots to solve the uniform dispersion problem.

关键词： Collision avoidance Robot kinematics Filling Fault tolerance Fault tolerant systems Dispersion

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Self-standardizing cognitive profile based on gardner's multiple intelligence theory

Self-standardizing cognitive profile based on gardner's mult...

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International Conference on Cognitive Infocommunications (CogInfoCom)

作者： Krisztián Pomázi László Gazdi Bertalan Radostyán Máté Szabó Luca Szegletes Bertalan Forstner Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781509026463

There are different theories to estimate cognitive abilities. Gardner proposed a model, where intelligence is defined by multiple fields instead of using one specific number. However, the characterization and automated evaluation of these fields are still open issues. If we can make standalone measurements in separate intelligence fields, the numerical modeling of the competencies is possible. Observing the cognitive abilities of children can lead us to an optimized learning experience in performance and engagement. Our aim is to automatically match problem sets and intelligence fields in order to achieve a faster and deeper learning experience. The amount of data to be collected makes the automation of this process a focus point of these studies. In this paper we present an automatic cognitive profiling system with the help of smart devices and AdaptEd - an adaptive educational gaming framework. With the presented system the learning methods and tasks can be fine-tuned, and a personalized and more effective learning environment can be achieved.

关键词： Games Servers Heart rate Education Brain modeling Biosensors Two dimensional displays

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Solving the filling problem with the visibility range of 1

Solving the filling problem with the visibility range of 1

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International Symposium on Intelligent Systems and informatics (SISY)

作者： Attila Hideg László Blázovics Bertalan Forstner Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

This paper discusses new methodologies of discovering areas with inexpensive autonomous robots. Consider a set of robots which has to disperse through the area in order to cover it. The area is divided into smaller cells and each cell has to be occupied by exactly one robot. When the robots are injected into the area one at a time the problem is called Filling. The main challenges arise from the limited capabilities of the robots: in this paper they do not have any means of explicit communication and their sensing range is limited to 1.

关键词： Collision avoidance Robot sensing systems Filling Computational modeling Radiation detectors

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Estimating task difficulty in educational games

Estimating task difficulty in educational games

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International Conference on Cognitive Infocommunications (CogInfoCom)

作者： Máté Szabó Krisztián Dániel Pomázi Bertalan Radostyán Luca Szegletes Bertalan Forstner Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781509026463

This paper presents a method for estimating difficulty of game tasks found in educational games. The method uses techniques from the field of socio-cognitive ICT, a branch of cognitive infocommunications. Our aim was to create an adaptive gaming experience for users of educational games. Adjusting the difficulty of game tasks according to the mental state of users is required for this approach. For some game tasks, however, difficulty is not known in advance. Our paper proposes a solution to this problem by presenting a model of an algorithm for game task difficulty estimation based on Bayesian probability theory and existing research on human intelligence. The paper also presents a simulation algorithm which is used to analyze the validity and efficiency of the estimation algorithm. An example of a real-world application of our method-an educational game made for university students of architecture and civil engineering-is also part of the paper.

关键词： Games Interpolation Bayes methods Electroencephalography Mobile handsets Learning (artificial intelligence) Brain modeling

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Analyzing .NET serialization components

Analyzing .NET serialization components

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International Symposium on applied Computational Intelligence and informatics ( SACI)

作者： Akos Nagy Bence Kovari Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781509023813

In this paper we present a number of available serialization libraries for the .NET platform, both integrated and 3rd party solutions and we analyze and compare their performance. Through this analysis and comparison we aim to deduct how the process of serialization can be further optimized and which parts of the process act as a bottleneck. The comparison also gives insight into how the data exchange format itself affects the whole process.

关键词： XML Libraries Protocols Web services Mobile handsets Java Length measurement

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Sensor fusion with enhanced Kalman Filter for altitude control of quadrotors

Sensor fusion with enhanced Kalman Filter for altitude contr...

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International Symposium on applied Computational Intelligence and informatics ( SACI)

作者： Dániel Hetényi Márton Gótzy László Blázovics Department of Automation and Applied Informatics Budapest University of Technology and Economics Hungary

ISBN: (纸本)9781509023813

The Unmanned Aerial Vehicles like quadrocopters, thanks to the increasing computational capacity of embedded systems, are being used at wide range of tasks i.e. aerial mapping, scouting etc. To control the position of these UAV's, a proper altitude measurement is necessary, however due to the noisiness of these flying systems the design of such controls is a difficult task. The aim of this paper is to expand the capabilities of the sensors of our quadcopter project. Process and fusion their signals to compose a cost efficient, stable and accurate height measurement solution designed for an embedded low-cost microcontroller. The Kalman Filter was chosen to fusion the signals of the sonar and the accelerometer. The realized filter on the embedded platform was field tested in real conditions and modified after the analysis process of the results.

关键词： Kalman filters Mathematical model Sensor fusion Accelerometers Jacobian matrices Covariance matrices Acceleration

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Performance prediction of robust header compression version 2 for RTP audio streaming using linear regression 22

Performance prediction of robust header compression version ...

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22nd European Wireless Conference, EW 2016

作者： Tömösközi, Máté Seeling, Patrick Ekler, Péter Fitzek, Frank H.P. Acticom GmbH Berlin Germany Department of Electronic Systems Aalborg University Denmark Department of Computer Science Central Michigan University Mount PleasantMI48859 United States Department of Automation and Applied Informatics Budapest University of Technology and Economics Hungary

ISBN: (纸本)9783800742219

Modern cellular networks utilising the long-term evolution (LTE) and the coming 5G set of standards face an ever-increasing demand for mobile data with low latency from connected devices. Header compression is employed to minimise the overhead for IP-based cellular network traffic, thereby decreasing the overall bandwidth usage, which consequently results in decreased delay for transmissions. In this paper, we evaluate a basic linear function to predict Robust Header Compression version 2's (RFC 5225) RTP compression savings on-the-fly, which will enable the compression to adapt to varying channel conditions dynamically. We find that this approach can achieve more than 90%accuracy for low error rates while being computationally non-demanding. This will aid future compressors to minimise compression overhead, thereby increasing the compression gain even further. © VDE Verlag GMBH, Berlin, Offenbach, Germany.

关键词： Wireless networks

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Visual Traffic Load Sensor for Emission Estimation

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Procedia Engineering 2016年 168卷 47-50页

作者： Kristóf Csorba Lilla Barancsuk László Blázovics Budapest University of Technology and Economics Department of Automation and Applied Informatics Magyar Tudósok krt. 2/Q 1117 Budapest Hungary

Traffic enumeration is a frequently used approach in smart city applications for estimating the traffic load of the road network. Many solutions use a camera and state-of-the-art image processing technologies. As image processing is relative resource consuming, either very simple methods are used, or the processing is performed off-site, on a central computer. The approach presented in this paper employs a powerful embedded system to process the video images in real-time, so that the communication traffic is limited to the transmission of retrieved statistics. In order to fit into the limited resources and still allow vehicle size and speed measurements, special data representations and processing pipeline has to be used. This paper presents the operation principles of the sensor, followed by the corresponding evaluation results.

关键词： smart city traffic counting embedded image processing

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Data collection for widely distributed mass of sensors

Data collection for widely distributed mass of sensors

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International Conference on Cognitive Infocommunications (CogInfoCom)

作者： Attila Hideg László Blázovics Kristóf Csorba Márton Gotzy Department of Automation AndApplied Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781509026463

Due to the increasing computational capacity of embedded systems, it has now become possible to monitor a given area efficiently by using a mass of low-cost sensors. However, the collection and analysis of such big data is still an open question from the perspective of energy efficiency. In this article will show a concept which covers the whole lifecycle of such huge scale sensor networks. We introduce a deployment and maintenance solution for uncharted areas. We present a method for gathering the measured data of each sensor and we will show a system for analyzing and visualizing the collected data.

关键词： Internet of Things Big Data distributed sensors embedded systems big data Embedded systems distributed sensors Internet of things Data Collection Methods Sensors distributed mass Life cycle

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Optimization of PWM for overmodulation region of two-level inverters

Optimization of PWM for overmodulation region of two-level i...

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International (EPE-PEMC) Power Electronics and Motion Control Conference

作者： Péter Stumpf Sándor Halász Dept. of Automation and Applied Informatics (AAI) Budapest University of Technology and Economics Dept. of Electric Power Engineering Budapest University of Technology and Economics

ISBN: (纸本)9781509017997

Two optimized PWM techniques for the overmodulation region of two-level inverter-fed ac drives are investigated from harmonic loss minimization point of view. The optimization is elaborated for the lowest loss-factor, which is proportional to the square of rms value of current harmonics. The loss-factors are computed for different switching numbers as the function of the motor fundamental voltage. It is shown that, respect to the motor heating and torque ripples, the acceptable drive condition can be guaranteed by relatively low value of inverter switching frequency up to 96-97% of maximal possible motor voltage. Furthermore, it is shown that, the so-called Three vector method, introduced in the paper, has considerably better performance in the lower part of the overmodulation region than the so-called Two vector method or the standard PWM techniques for the same number of switching. The theoretical results are verified by experimental tests.

关键词： Harmonic analysis Pulse width modulation Inverters Switching frequency Switches Torque AC motors

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