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Journal of Automation Mobile Robotics and Intelligent Systems
EN The notion of positive discrete-time Lyapunov system is introduced. Solution of the Lyapunov state equation is derived and necessary and sufficient conditions for the positivity of Lyapunov system are established. Different necessary and sufficient conditions for the asymptotic stability of the posi[...]
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Journal of Automation Mobile Robotics and Intelligent Systems
EN The realization problem for 2D positive singular linear hybrid systems is formulated, as well as a method based on the state variable diagram for finding a positive realization of a given improper transfer function is proposed. Sufficient conditions for the existence of a positive realization of a g[...]
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Control and Cybernetics
EN The paper studies the realization problem for series and parallel connections of nonlinear single-input single-output systems, described by higher order differential equations. Necessary and sufficient conditions are given for the existence of the classical state space realization in both cases. It [...]
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Archives of Control Sciences
EN The realization problem for positive fractional continuous-time linear systems is addressed. Sufficient conditions for the existence of positive realizations for continuous-time linear systems are established. Procedures for computation of positive fractional realizations for SISO and MIMO continuou[...]
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Gospodarka Wodna
2008 Nr 12 485-496
PL Zbudowany w latach 1969-1973 zbiornik wodny Sulejów - pomimo dość starannie wykonanego przez CBSiPBW Hy-droprojekt w Warszawie projektu - wymagał wprowadzenia podczas budowy wielu zmian i uzupełnień. Większość z nich była pomysłem inwestora zbiornika, ale uwzględniono również wymagania przyszłych je[...]
EN Constructed in the years 1969-1973, the Sulejów water reservoir - in spite of its design, quite well prepared by the „Hydroprojekt" Central Bureau of Studies and Water Construction Design in Warsaw - required numerous modifications and supplements during its construction. The majority of them were i[...]
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Metrology and Measurement Systems
EN Owing to the dramatic change in the thermal conductivity of 4He when its temperature crosses the transition of superfluid (HeI) and normalfluid (HeII), a sealed-cell with a capillary is used to realize the lambda transition temperature, Tλ. A small heat flow is controlled through the capillar[...]
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Opto - Electronics Review
EN In this article, we propose the realization of XNOR logic function by using all-optical XOR and NOT logic gates. Initially, both XOR and NOT gates are designed, simulated and optimized for high contrast outputs. T-shaped waveguides are created on the photonic crystal platform to realize these logic [...]
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Metrology and Measurement Systems
EN The realization of a dew/frost-point temperature scale is important for the calibration of hygrometers and dew/frost-point meters. Also, it was found that it is prime important for the National Institute for Standards-Egypt (NIS) to develop measurements of humidity field. Experimental work used for [...]
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Control and Cybernetics
2013 Vol. 42, no. 2 315--327
EN The problem of realization of a linear input-output map as a positive linear system on a time scale is studied. To state the criteria of existence of realization, modified Markov parameters corresponding to the input-output map are introduced. It is necessary for the existence of a positive realizat[...]
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Control and Cybernetics
EN Linear constant-coefficients control systems with output on arbitrary time scales are studied. Kalman criteria of controllability and observability are extended to such systems. The main problem is to find criteria for an abstract input/output map to have a realization as a system on the time scale.[...]
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Control and Cybernetics
EN The positive realization problem for a class of singular continuous-time linear SISO systems with delays in state and in output is addressed. The notions of canonical forms of matrices and of dual systems are extended for singular linear systems with delays. Necessary and sufficient conditions for p[...]
12
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Inżynieria i Budownictwo
2008 R. 64, nr 10 559-560
PL Przedstawiono realne problemy realizacji inwestycji komunikacyjnych w Polsce, ze szczególnym zwróceniem uwagi na problematykę kosztów, zarówno w kraju, jak i zagranicą. Podano krytyczne uwagi dotyczące działań rządowych oraz oczekiwania przedsiębiorstw wykonawczych w tym zakresie.
EN Real problems related to transport infrastructure in Poland are presented, with the emphasize put on the capital expenditure involved in the country and outside the country. Critical remarks concerned with the government strategy and the expectations of contractors with this regard are also addresse[...]
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Archives of Control Sciences
EN The realization problem for 2D positive multi-inputs and multi-outputs (MIMO) linear hybrid systems is formulated and a method based on the state variable diagram for finding a positive realization of a given proper transfer matrix is proposed. Sufficient conditions for the existence of a positive r[...]
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Archives of Control Sciences
EN The realization problem for positive multi-input and multi-output (MIMO) linear hybrid systems with the form of second Fornasini-Marchesini model is formulated and a method based on the state variable diagram for finding a positive realization of a given proper transfer matrix is proposed. Sufficien[...]
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Archives of Control Sciences
EN A method for computation of positive asymptotically stable realizations of fractional descriptor continuous-time linear systems with regular pencil is proposed. The method is based on the decomposition of the improper transfer matrix into strictly proper matrix and a polynomial matrix. A procedure f[...]
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Archives of Control Sciences
EN A new modified state variable diagram method is proposed for determination of positive realizations with reduced numbers of delays and without delays of linear discrete-time systems for a given transfer function. Sufficient conditions for the existence of the positive realizations of given proper tr[...]
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Control and Cybernetics
2013 Vol. 42, no. 1 183--215
EN Biochemical reaction networks may be modeled as biochemical reaction systems consisting of differential equations with rational functions. Biochemical reaction systems are defined as rational positive dynamic systems with inputs and outputs, and illustrated by examples. This formulation makes availa[...]
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Wiadomości Elektrotechniczne
2016 R. 84, nr 1 25--29
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Bulletin of the Polish Academy of Sciences. Technical Sciences
EN Conditions for the existence of positive stable realizations with system Metzler matrices for proper transfer function are established. It is shown that there exists a proper stable realization of transfer function of second order if and only if the transfer function has real negative poles. Suffici[...]
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Ceramika Budowlana
2016 nr 4 18--20
PL Naszymi rozmówcami są architekci z pracowni Projekt Samograj - Małgorzata Dąbrowska-Graj o Tomasz Graj, którzy zaprojektowali nową siedzibę Domu Kultury Kadr. Na części elewacji obiektu zlokalizowanego na warszawskim Mokotowie w niezmiernie oryginalny sposób została wykorzystana cegła klinkierowa. B[...]
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