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Huainan, China

Five radical-Ln(III)-radical complexes, [Ln(hfac) 3(NITPhOC 4H 9) 2] (Ln = Gd (1), Tb (2), Dy (3), Ho (4), Er (5); hfac = hexafluoroacetylacetonate; and NITPhOC 4H 9 = 4′-butoxy-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been synthesized, structurally and magnetically characterized. The X-ray crystal structure analysis reveals that the structures of the five complexes are isomorphous in which central Ln(III) ions are coordinated by six oxygen atoms from three hfac and two oxygen atoms from nitronyl radicals. The magnetic studies show that in the Gd(III) complex, there are ferromagnetic Gd(III)-Rad interactions and antiferro-magnetic Rad-Rad interactions in the molecules (with J Rad-Gd = 0.19 cm -1, J Rad-Gd = -1.91 cm -1). And the analogous complex of [Tb(hfac) 3(NITPhOC 4H 9) 2] (2) shows the strong ferromagnetic Tb(III)-Rad interactions. © 2012 Elsevier B.V. All rights reserved. Source

Sun Y.,Huainan Normal University
International Journal of Systems Science | Year: 2014

In this paper, the finite-time boundedness and stabilisation problems of a class of networked control systems (NCSs) with bounded packet dropout are investigated. The main results provided in the paper are sufficient conditions for finite-time boundedness and stability via state feedback. An iterative approach is proposed to model NCSs with bounded packet dropout as jump linear systems (JLSs). Based on Lyapunov stability theory and JLSs theory, the sufficient conditions for finite-time boundedness and stabilisation of the underlying systems are derived via linear matrix inequalities (LMIs) formulation. Moreover, both sensor-to-controller and controller-to-actuator packet dropouts are considered simultaneously. Lastly, an illustrative example is given to demonstrate the effectiveness of the proposed results. © 2013 © 2013 Taylor & Francis. Source

Ji Q.,Huainan Normal University | Lu Y.,Harbin Engineering University
International Journal of Bifurcation and Chaos | Year: 2013

Oscillatory patterns in a one-pool model with Ca2+-activated IP3 degradation are presented and classified, based on fast/slow dynamical analysis and two-parameter bifurcations. The whole parameter space can be partitioned into two parts, that is, the oscillatory and rest regions. For this purpose, we perform the continuation of fold bifurcation, Hopf bifurcation and saddle-node bifurcation of limit cycles, respectively. Several distinct topological types of complex intracellular Ca2+ oscillations (especially bursting) are investigated in the oscillatory area. The classification and transition of different types of Ca2+ oscillations may offer a possible explanation for the differences in dynamic behavior observed in real cells in response to different levels of stimulation. © 2013 World Scientific Publishing Company. Source

Wu Z.,Huainan Normal University
Journal of Computational Information Systems | Year: 2013

In this paper, the control problem for an offshore steel jacket platform subject to external disturbances and nonlinear self-excited wave force is concerned by using sliding mode control methods. A sliding mode controller with robust terms is proposed to reduce the oscillation amplitudes of the offshore platform. The robust terms are used to handle the system uncertainties. Throughout the simulation results we can find that the control approach this paper proposed is valid for offshore platform. Copyright © 2013 Binary Information Press. Source

Four radical-Ln(III)-radical complexes, [Ln(hfac) 3(NITPhSCH 3) 2] (Ln=Gd (1), Dy (2), Er (3), Ho (4); hfac=hexafluoroacetylacetonate; NITPhSCH 3=4′-thiomethylphenyl- 4,4,5,5tetramethyl-imidazoline-1-oxyl-3-oxide), have been synthesized, and structurally and magnetically characterized. The X-ray crystal structures show that the structures of the four complexes are similar, consisting of isolated molecules in which Ln(III) ions are coordinated by six oxygen atoms from three hfac and two oxygen atoms from nitronyl radicals. The temperature dependencies of magnetic susceptibilities for the four complexes show that in the Gd(III) complex, ferromagnetic interactions between Gd(III)-radical and antiferromagnetic interactions between the radicals coexist with J Rad-Gd=1.09 cm -1, J Rad-Rad=-1.85 cm -1. © 2011 Taylor & Francis. Source

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