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1

A multiple-criteria approach to machine-tool selection for focused flexibility manufacturing systems

Gola A., Świć A., Kramar V.

Management and Production Engineering Review

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2011

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Vol. 2, No. 4

21-32

EN

This paper proposes a new methodology of computer aided machine tools selection for focused flexibility manufacturing systems. The methodology is based on multi-criterion approach and allows to select suboptimal sets of machine tools with the right level of flexibility required by the specific production problem. In the selection process, we first consider critical decision criteria which directly decide if a given machine tool is suitable to realize a defined production task and complies with conditions specified by the designer. Furthermore, economic considerations are taken into account in order to find the best solution from the viewpoint of minimization of both investment costs and time of machining. An illustrative example of machine tool selection using the proposed methodology and the software implementation is also provided.

2

Design of equivalent one-time model of multivariable multi-stage control system

Barabanov A, Kramar V., Świć A., Taranenko V.

Applied Computer Science

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2008

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Vol. 4, no 1

1--17

EN

If a control system contains a few digital chains of treatment of information with different periods of quantum, its research is strongly complicated. In the case of rational commensurable periods of quantum transformation of a multirate system it is possible to design an equivalent one-time system with enhanceable dimension. The general going is offered to the design of an equivalent one-time system, allowing to transform the vectorial-matrix model of the initial multirate system into a vectorial-matrix one-time model of the system, characteristic for vectorial-matrix models of multidimensional continuous systems. Due to that, it becomes possible, in principle, to transfer of methods of analysis of continuous multidimensional systems onto the class of digital-analogue multirate systems.

3

Magneto-optical bistability of organic semiconductors

Derevyanchuk O., Zenkova C., Kramar V., Nitsovich B.

Elektronika : konstrukcje, technologie, zastosowania

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2004

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Vol. 45, nr 8-9

303-304

EN

The particularities of nonlinear absorption by organic semiconductors in the external magnetic field has been studied. The special features of hysteresis loop formation in the incoming-outgoing light intensity dependence has been investigated. The form function of exciton absorption with the polarization of laser radiation and a weak magnetic field has been calculated. It is found that the magneto-optical response of molecular semiconductors gives rise to the inverse character of OB loop formations, which allows to control and influence the behaviour of OB elements of optical logical systems.

PL

Prowadzono prace badawcze nad specylicznymi właściwościami nieliniowej absorpcji półprzewodników organicznych w zewnętrznym polu magnetycznym. Badano cechy szczególne związane z tworzeniem się pętli histerezy zależności pomiędzy natężeniem światła przychodzącego a wychodzącego. Wyznaczono kształt funkcji absorpcji ekscytonów przy polaryzacji za pomocą promieniowania laserowego oraz słabego pola magnetycznego. Stwierdzono, że odpowiedź magnetooptyczna półprzewodników molekularnych zapoczątkowuje odwrotny charakter tworzenia się pętli optycznej bistabilności, która pozwala na sterowanie i wpływanie na zachowanie optycznie bistabilnych elementów optycznych systemów logicznych.