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Kowalewski, A.
International Centre for Theoretical Physics, Trieste (Italy)1982
International Centre for Theoretical Physics, Trieste (Italy)1982
AbstractAbstract
[en] In this paper an optimal control problem with non-differentiable cost function for distributed parameter system is solved. As an example an optimal control problem for system described by a linear partial differential of hyperbolic type with the Neuman's boundary condition is considered. By use of the Milutin-Dubovicki method, necessary and sufficient conditions of optimality with non-differentiable performance functional and constrained control are derived for Neuman's problem. (author)
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Nov 1982; 15 p
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Report
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AbstractAbstract
[en] This paper investigates a class of hybrid synchronization phenomenon in coupled identical Chen systems by linear control. Theoretical analysis and numerical simulation show that part of the states of the coupled Chen system are anti-phase synchronized, and part complete-synchronized under certain parameter region
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S0960-0779(06)01083-6; Available from http://dx.doi.org/10.1016/j.chaos.2006.11.028; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Chaos, Solitons and Fractals; ISSN 0960-0779;
; v. 38(2); p. 461-464

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Raymond, J.-P.; Vanninathan, M., E-mail: raymond@mip.ups-tlse.fr, E-mail: vanni@math.tifrbng.res.in2009
AbstractAbstract
[en] A model representing a coupling between a heat conducting medium and a solid structure is considered. We establish a Carleman inequality for this model. Next we deduce a null controllability result with an internal control in the conducting medium and there is no control in the solid part
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Copyright (c) 2009 Springer Science+Business Media, LLC; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Applied Mathematics and Optimization; ISSN 0095-4616;
; v. 59(2); p. 247-273

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AbstractAbstract
[en] In this paper, a scheme of close-loop feedback is proposed to induce transition of spiral pattern in the excitable media, which is described with the modified FitzHugh-Nagumo model. The numerical simulation results confirm that the stable rotating spiral wave is removed and the whole media becomes homogeneous when appropriate intensity of feedback is used no matter whether the coupling feedback is imposed on the whole media or the sites in one line in the media
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Available from http://dx.doi.org/10.1088/0253-6102/50/6/24; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Communications in Theoretical Physics; ISSN 0253-6102;
; v. 50(6); p. 1361-1364

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AbstractAbstract
[en] Short communication
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Ministry of Science and Development, Jerusalem (Israel); 165 p; Oct 1993; p. 14; International conference on control theory and its applications; Kibbutz Maale HaChamisha (Israel); 18-21 Oct 1993
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Miscellaneous
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Conference
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Ostalczyk, P W, E-mail: postalcz@p.lodz.pl2009
AbstractAbstract
[en] In this paper, a fractional-order backward-difference equivalent formula is considered. From a Gruenwald-Letnikow definition formula of a backward-difference (fractional or integer order) an equivalent form is derived. It may be useful in real time calculations (for instance in the evaluation of digital control strategies) due to the reduction in the number of multiplications and additions. The proposed equivalent form may also improve the correctness of the fractional-order backward-difference value. The investigations are illustrated by a numerical example.
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FDA 08: International workshop on fractional differentiation and its applications; Ankara (Turkey); 5-7 Nov 2008; Available from http://dx.doi.org/10.1088/0031-8949/2009/T136/014036; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Literature Type
Conference
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Physica Scripta (Online); ISSN 1402-4896;
; v. 2009(T136); [5 p.]

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Chen, C.-K.; Lai, T.-W.; Yan, J.-J.; Liao, T.-L., E-mail: tlliao@mail.ncku.edu.tw2009
AbstractAbstract
[en] This study is concerned with the identical synchronization problem for a class of chaotic systems. A dynamic compensator is proposed to achieve the synchronization between master and slave chaotic systems using only the accessible output variables. A sufficient condition is also proposed to ensure the global synchronization. Furthermore, the strictly positive real (SPR) restriction, which is normally required in most of the observer-based synchronization schemes, is released in our approach. Two numerical examples are included to illustrate the proposed scheme.
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S0960-0779(07)00327-X; Available from http://dx.doi.org/10.1016/j.chaos.2007.04.004; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Chaos, Solitons and Fractals; ISSN 0960-0779;
; v. 39(3); p. 1055-1063

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Xiao Yanni; Tang Sanyi, E-mail: sanyitang219@hotmail.com2008
AbstractAbstract
[en] Models of biological control have a long history of theoretical development that have focused on the interaction of a parasitoid and its host. The host-parasitoid systems have identified several important and general factors affecting the long-term dynamics of interacting populations. However, much less is known about how the initial densities of host-parasitoid populations affect the biological control as well as the stability of host-parasitoid systems. To do this, the classical Nicholson-Bailey model with host self-regulation and parasitoid intergenerational survival rate is used to uncover the effect of initial densities on the successful biological control. The results indicate that the simplest Nicholson-Bailey model has various coexistence with a wide range of parameters, including boundary attractors where the parasitoid population is absent and interior attractors where host-parasitoid coexists. The final stable states of host-parasitoid populations depend on their initial densities as well as their ratios, and those results are confirmed by basins of attraction of initial densities. The results also indicate that the parasitoid intergenerational survival rate increases the stability of the host-parasitoid systems. Therefore, the present research can help us to further understand the dynamical behavior of host-parasitoid interactions, to improve the classical biological control and to make management decisions
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S0960-0779(06)00964-7; Available from http://dx.doi.org/10.1016/j.chaos.2006.10.002; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Chaos, Solitons and Fractals; ISSN 0960-0779;
; v. 37(4); p. 1048-1058

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AbstractAbstract
[en] The control problem treated in this paper is the output controllability of a nonlinear system in the form: x = f(x) + g(x)u(t); y = h(x), using bounded controls. The approach to the problem consists of a modification in the system using dynamic feedback in such a way that the input/output behaviour of the closed loop matches the input/output behaviour of a completely output-controllable system with bounded controls. Sufficient conditions are also put forward on the system so that a compact set in the output space may be reached in finite time using uniformally bounded controls, and a result on output regulation in finite time with asymptotic state stabilization is obtained. (Author)
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Pre-print.
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Journal Article
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Trabajos de Matematica; ISSN 0325-6677;
; (Preprint155) 21 p

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Il’yn, N. B.; Pechen’, A. N., E-mail: ilyn@mi.ras.ru, E-mail: pechen@mi.ras.ru2019
AbstractAbstract
[en] In this paper, we discuss approximations of the dynamical quantum Zeno effect by a fixed number of nonselective quantum measurements. A wide class of measurements whose efficiency is close to optimal in the case of two-level systems is found.
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Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA)
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