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A Database of Manoeuvres for Avoiding Conflicts Between Aircraft in Selected Training Simulations

Naděžda BARTOŠOVÁ

Abstract


This article focuses on a proposed database of manoeuvres, which can be used to prevent conflict situations (reduction of the minimum separation limits between planes). The presented database is part of a more extensive project, which involves presentation of an expert system serving for automatic detection of conflict situations and for a proposal of their optimum resolution in training simulations, which are used to provide basic training to air traffic controllers.

Keywords


Conflict Situations, Aircraft, Expert System, Database, Manoeuvres Avoidance, Simulation Air Situations.
Full paper

2014-11-27 11:30

Lessons Learned from Data Mining Challenges

Petr BERKA

Abstract


It becomes a good habit to organize a data mining cup, a competition or a challenge at machine learning or data mining conferences. Such events can be used for comparison of various approaches and algorithms, they give the participants a possibility to access and analyze real-world data, and they can result in knowledge interesting for the domain experts who provided the data. Cups and competitions are usually organized around a well-defined classification problem whereas challenges do not have a clear specification what to look for. The paper describes our experience gained when organizing and evaluating the data mining challenges during European Conferences on Data Mining and Machine Learning. It shows the challenge settings, describes the used data and the solved tasks and summarizes the lessons learned.

Keywords


Data Mining, Machine Learning, Classification, Prediction, Knowledge Acquisition, Discovery Challenge.
Full paper

2014-11-26 14:10

Optimization of Induction Motor by FE Analysis

Dušan MAGA

Abstract


The concept of FE model of induction (asynchronous) motor has been analyzed by author in [1]. While in [1] the analytical design [2] has been verified by numerical (finite element) analysis, this paper deals with optimization technique based on finite element solution. The aim of the optimization is to obtain the maximal possible torque. The optimization procedures, based on procedures successfully used by author with reluctance machinery [3], are transformed to spheres of induction machinery, where possible changes applied to model geometry and electric (supply current density and rotor bars current response) parameters are generating different mechanical torque on machine shaft. The induction machines are very often equipped in pumps and pump systems produced in industrial region in Tatabanya, Hungary.

Keywords


Induction Motor; Finite Element Magnetic Field Analysis; Torque Computation; Optimization.
Full paper

2014-08-05 16:25

An Assessment of Informational Threat in the Functioning Process of Virtual Community

Ruslan HUMINSKYI and Andrii PELESHCHYSHYN

Abstract


In addition to the support functions of communication, an exchange of opinions, obtaining information, business organization and management, social networks have increasingly become an objects and instruments of external communicatory-psychological management and the arena of informational antagonism at different levels. Social networks have become the perfect tool of influence on national interests in the informational area. In order to prevent informational threats in virtual communities and to prevent implementation in the real world there is a need to assess their performance at the stage of their functioning in social networks.

Keywords


virtual communities, social networks, informational security, informational threats.
Full paper

2014-08-01 17:33

FE Model of Induction Motor

Dusan MAGA

Abstract


Based on local situation in the industrial region of Tatabanya, Hungary, the most frequently used mechatronical actuator has been identified. Wastewater and/or other pumps, as well as scuba pump systems are mostly equipped by induction (asynchronous) motors. This machinery often meets the major production of the largest local company, as well as a lot of other smaller corporations dealing with electrical machinery and mechatronical actuators. The numerical analysis of the machine, presented in the paper, is a base for following optimization processes. The main objective of this work is to optimize the used machinery with special attention paid to motor’s torque and so to save the energy necessary to power the used technologies (the optimization procedures and the following results will be presented in author’s next paper).

Keywords


Electrical machines, Induction Motors, Finite Element Field Simulation, Numerical Analysis, Comparison of Analytical Design and Numerical Analysis.
Full paper

2014-01-29 10:09