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1

Three-dimensional Computer Simulation of Warp Knitted Spacer Fabric

Zhang L. Z., Jiang G. M., Miao X. H., Cong H. L.

Fibres & Textiles in Eastern Europe

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2012

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Vol. 20, no. 3 (92)

56--60

EN

The main objective of this paper was to simulate the three-dimensional structure of warp knitted spacer fabric using computer technology. For this purpose, the geometric structure of warp knitted spacer fabric was investigated. Specifically, a 3D spacial stitch model of warp knitted spacer fabric is developed using non-uniform rational B-spline(NURBS) curves and surfaces. Since the stitches in real fabric are usually inclined, the offset rule of special stitches is employed in order to simulate the stitches more realistically. Then the offset calculation formulas for each given point in the 3D stitch model are obtained. Finally 3D computer simulation of warp knitted spacer fabric is achieved and some simulation images of this kind of fabric are generated on the computer. The mechanism developed in this paper can model the 3D structures of common warp knitted spacer fabric interactively and accurately.

PL

Celem badań była symulacja trójwymiarowej struktury osnowowych dzianin dystansowych z zastosowaniem technologii komputerowej. Zbadano geometryczną strukturę trójwymiarowych dzianin dystansowych. Trójwymiarowy model splotu tych dzianin został opracowany za pomocą analizy krzywych i powierzchni NURBS. Ponieważ w rzeczywistych dzianinach sploty są zazwyczaj nachylone, w celu uzyskania bardziej realistycznego obrazu dzianiny dystansowej zastosowano regułę pozwalająca na wyrównanie splotów specjalnych. Następnie dla każdego punktu trójwymiarowego modelu splotu określono odpowiednie równania. W efekcie uzyskano 3D komputerową symulację dzianiny oraz obrazy tych struktur. Na podstawie procedury opracowanej w niniejszej pracy można dokładnie modelować proste dzianiny dystansowe.

2

Synthesis and Characterization of Three Novel Ferromagnetic Copper(II) Binuclear Complexes Bridged by Phthalato

Ma S., Zhang L. Z.

Polish Journal of Chemistry

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2002

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Vol. 76 / nr 11

1537-1543

EN

Three novel copper(II) binuclear complexes with phthalate dianion as bridging ligand have been obtained, namely [Cu2(phth)(L)4](ClO4)2, where phth denotes the phthalate dianion and L represents 1,10-phenanthroline (abbreviated as phen), 2,2_-bipyridine (bpy) or 4,4_-dimethyl-2,2_-bipyridine (Me2bpy). Meanwhile, the IR, electronic spectra, ESR spectra and the temperature-dependent magnetic susceptibility of the three complexes were analyzed. The results of the magnetic analyses show a weak ferromagnetic coupling between the paramagnetic ions in all complexes studied.

3

Novel Ferromagnetic Coupling Dicopper(II), Antiferromagnetic Dicobalt(II) and Dimanganese(II) Complexes with 3-Nitro-phthalato as Bridging Ligand: Synthesis, Spectrum and Magnetism

Ma S. L., Zhang L. Z., Lu L. L., Tang M. Y.

Polish Journal of Chemistry

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2002

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Vol. 76 / nr 4

511-517

EN

Novel copper(II), cobalt(II) and manganese(II) binuclear complexes have been synthesized, namely [Cu2(3-NO2-phth)(phen)4](ClO4)2 and [M2(3-NO2-phth)(phen)4(H2O)2](ClO4)2, whereM=Co orMn, phen = 1,10-phenanthroline and 3-NO2-phth denotes 3-nitro-phthalate dianion. Magnetic susceptibility measurements between 4.2-300 K (or 77-300 K) demonstrate a ferromagnetic interaction between two copper(II) ions in the Cu-Cu complex, and a weak antiferromagnetic interaction between the metal ions in Co-Co and Mn-Mn complexes. Based on spin Hamiltonian operator, _H = -2J _ S1_ _ S2 (S1=S2 = 1/2, S1=S2 = 3/2 or S1 = S2 = 5/2), J is found to be equal to +5.26 cm-1, -1.72 cm-1 and -0.62 cm-1 for the Cu-Cu, Co-Co and Mn-Mn complexes, respectively

4

Synthesis and Magnetic Properties of SOD Mimics – Two Copper(II) Binuclear Complexes Bridged by Oxamido-N,N’-diacetic Acid and Acetate Anion

Zhang L. Z., Ma S. L.

Polish Journal of Chemistry

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2001

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Vol. 75, nr 12

1833-1837

EN

It is well known that SOD (superoxide dismutase) plays a critical role in organism. How-ever, as a kind of protein, SOD itself has certain limits in the field of application. As a re-sult, the SOD-mimetic complexes which may better SOD-activity to a certain extent can be of much importance. Two SOD mimics which arę novel fi-oxamidato binuclear unit complexes with ID structure have been synthesized, namely {Na[Cu2(oxaa)L2OAc]}", where oxaa is oxamido-N,N'-diacetic acid tetraanion and L denotes l, 10-phenanthroline or 5-nitro-1,10-phenanthroline. The temperaturę dependence of the magnetic susceptibil-ities of {Na[Cu2(oxaa)(l,10-phen)2OAc]}" has been inyestigated in the 4.99-299 K rangę, giving the exchange parameter J = -309.0 cm"'. This result is commensurate with antiferromagnetic interaction between the adjacent metal ions.