Dynamical systems modelling of the interactions of animal stocking density and soil fertility in grazed pasture.
Wickham, I.D., Wake, G.C., Woodward, S.J.R., Thorrold, B.S. (1997)
Journal of Applied Mathematics and Decision Sciences
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Wickham, I.D., Wake, G.C., Woodward, S.J.R., Thorrold, B.S. (1997)
Journal of Applied Mathematics and Decision Sciences
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Ulf von Kalckreuth, Manfred Krtscha (2004)
Applications of Mathematics
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In economic systems, reactions to external shocks often come with a delay. On the other hand, agents try to anticipate future developments. Both can lead to difference-differential equations with an advancing argument. These are more difficult to handle than either difference or differential equations, but they have the merit of added realism and increased credibility. This paper generalizes a model from monetary economics by von Kalckreuth and Schröder. Working out its stability properties,...
Ján Andres (1986)
Časopis pro pěstování matematiky
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Matsumoto, Akio (2002)
Discrete Dynamics in Nature and Society
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Mihail Voicu, Octavian Pastravanu (2002)
Kybernetika
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For Popov’s frequency-domain inequality a general solution is constructed in , which relies on the strict positive realness of a generating function. This solution allows revealing time-domain properties, equivalent to the fulfilment of Popov’s inequality in the frequency-domain. Particular aspects occurring in the dynamics of the linear subsystem involved in Popov’s inequality are further explored for step response, as representing a usual characterization in control system analysis....
Lupu, Mircea, Florea, Olivia, Lupu, Ciprian (2009)
Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
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Milan Hofreiter, Pavel Zítek (2003)
International Journal of Applied Mathematics and Computer Science
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Currently used stability criteria for linear sampled-data systems refer to the standard linear difference equation form of the system model. This paper presents a stability criterion based on the argument increment rule modified for the delta operator form of the sampled-data model. For the asymptotic stability of this system form it is necessary and sufficient that the roots of the appropriate characteristic equation lie inside a circle in the left half of the complex plane, the radius...