Krzysztof Kozlowski

Prof. Dr. Krzysztof Kozlowski

Poznan University of Technology, Poland

Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 December 2012 in Bulletin Of The Polish Academy Of Sciences-Technical Sciences
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Journal Article
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WKW. Kowalczyk
W. Kowalczyk
MMM. Michałek
M. Michałek
Krzysztof KozlowskiKrzysztof Kozlowski
Krzysztof Kozlowski

1 November 2008
Verified
Conference Paper
Closed access
JTJozsef K. Tar
Jozsef K. Tar
JBJanos F. Bito
Janos F. Bito
IRImre J. Rudas
Imre J. Rudas
Krzysztof KozlowskiKrzysztof Kozlowski
Krzysztof Kozlowski
Jose Antonio Tenreiro MachadoJose Antonio Tenreiro Machado
Jose Antonio Tenreiro Machado
In this paper a further step towards a novel approach to adaptive nonlinear control developed at Budapest Tech in the past few years is reported. Its main advantage in comparison with the complicated Lyapunov function based techniques is that its fundament is some simple geometric consideration allowing to formulate the control task as a Fixed Point Problem for the solution of which various Contractive Mappings can be created that generate Iterative Cauchy Sequences for Single Input - Single Output (SISO) systems. These sequences can converge to the fixed points that are the solutions of the control tasks. Recently alternative potential solutions were proposed and sketched by the use of special functions built up of the "response function" of the excited system under control. These functions have almost constant values apart from a finite region in which they have a "wrinkle" in the vicinity of the desired solution that is the "proper" fixed point of these functions. It was shown that at one of their sides these fixed points were repulsive, while at the opposite side they were attractive. It was shown, too, that at the repulsive side another, so called "false" fixed points were present that were globally attractive, with the exception of the basins of attraction of the "proper" ones. This structure seemed to be advantageous because no divergences could occur in the iterations, the convergence to the "false" values could easily be detected, and by using some ancillary tricks in the most of the cases the solutions could be kicked from the wrong fixed points into the basins of attraction of the "proper ones". It was expected that via adding simple rules to the application of these transformations good adaptive control can be developed. However, due to certain specialties of these functions practical problems arose. In the present paper novel transformations are presented that seem to evade these difficulties. Their applicability is illustrated via simulations in the ad

1 January 2008 in IFAC Proceedings Volumes
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Journal Article
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Dariusz PazderskiDariusz Pazderski
Dariusz Pazderski
Krzysztof KozlowskiKrzysztof Kozlowski
Krzysztof Kozlowski


30 September 2006 in Archive of Applied Mechanics
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Journal Article
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PHPrzemyslaw Herman
Przemyslaw Herman
Krzysztof KozlowskiKrzysztof Kozlowski
Krzysztof Kozlowski

1 November 2018
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Conference Paper
Closed access
Slawomir KuklinskiSlawomir Kuklinski
Slawomir Kuklinski
LTLechosław Tomaszewski
Lechosław Tomaszewski
Krzysztof KozlowskiKrzysztof Kozlowski
Krzysztof Kozlowski
SPSlawomir Pietrzyk
Slawomir Pietrzyk
Network slicing is a technology that will soon influence the way in which new networking solutions will be designed and operated. The approach impacts the telco business ecosystem significantly. In this paper, we discuss two business models that are enabled by network slicing. One of them is applicable to a single infrastructure domain, whereas another concerns the involvement of multiple infrastructure and slice providers through the use of the brokering mechanism. We have also discussed the implementation of the business models. In that context, we have shown the shortcomings of the ETSI NFV MANO architecture in a multi-provider environment and proposed its modifications.