Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Existence and exponential stability of a periodic solution for fuzzy cellular neural networks with time-varying delays

Zhang Q., Yang L., Liao D.

International Journal of Applied Mathematics and Computer Science

2011

Vol. 21, no 4

649-658

Fuzzy cellular neural networks with time-varying delays are considered. Some sufficient conditions for the existence and exponential stability of periodic solutions are obtained by using the continuation theorem based on the coincidence degree and the differential inequality technique. The sufficient conditions are easy to use in pattern recognition and automatic control. Finally, an example is given to show the feasibility and effectiveness of our methods.

Syntheses, Structure and Magnetism of Heterobinuclear mi-Oxamido Cu(II)-Ni(II) Complexes Containing tacn as a Terminal Ligand

Yau H., Yan S., Liao D., Wang G., Yao X., Wang H.

Polish Journal of Chemistry

2004

Vol. 78 / nr 7

911-917

Two new heterobinuclear complexes, namely Ni(tacn)Cu(oxpn)(ClO4)2.2H2O (1) and Ni(tacn)Cu(pmoxd)(ClO4)2.CH3OH (2), have been prepared from the planar fragments Cu(oxpn) and Cu(pmoxd) (tacn denotes 1,4,7-triazacyclononane, oxpn and pmoxd stand for the dianions of N,N'-bis(3-aminopropyl)oxamide and N,N'-bis(2-pyridylmethyl) oxamide, respectively). Compound 1 crystallizes in the triclinic system, space group Pî, with a= 8.573(2), b= 12.808(3), c = 13.122(3) A, alfa = 99.63(3), beta = 104.72(3) and gama = 96.45(3) graduate at 299 K, Z = 2. The Cu(II) ions are in square-pyramidal surroundings and the Ni(II) ions in octahedral surroundings. The temperature dependence of the magnetic susceptibilities of 1 has been studied in the 5-300 K range, giving the exchange integral J = -92.7 cm-1. This value, while close to those reported for other Cu(II)-Ni(II) complexes involving Cu(oxpn), represents the minimum exchange constant of such heterobinuclear system.