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Periodic coordination in hierarchical air defence systems

100%
Arabas P., Malinowski K.
International Journal of Applied Mathematics and Computer Science
|
2001
|
tom 11
|
nr 2
493-513
EN
The subject of this work is the defence planning of a point target against an air attack. The defence system is decomposed into a number of sectors. A direct method of coordination is used at the upper level, while the sectors use a discrete-time event-based model and the description of uncertainty by multiple scenarios of an attack. The resulting problems are solved using linear programming. A comparison of two coordination strategies for realistic attack scenarios and an analysis of effectiveness are provided.
2
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Customized crossover in evolutionary sets of safe ship trajectories

100%
Szłapczyński R., Szłapczyńska J.
International Journal of Applied Mathematics and Computer Science
|
2012
|
tom 22
|
nr 4
999-1009
EN
The paper presents selected aspects of evolutionary sets of safe ship trajectories-a method which applies evolutionary algorithms and some of the assumptions of game theory to solving ship encounter situations. For given positions and motion parameters of the ships, the method finds a near optimal set of safe trajectories of all ships involved in an encounter. The method works in real time and the solutions must be returned within one minute, which enforces speeding up the optimisation process. During the development of the method the authors tested various problem-dedicated crossover operators to obtain the best performance. The results of that research are given here. The paper includes a detailed description of these operators as well as statistical simulation results and examples of experiment results.
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