Showing papers by "Wuhan University of Technology published in 1987"
01 Jan 1987
TL;DR: In this paper, the moving regularity of a curved tube on a computer-controlled filament winding machine is discussed, and the motion equations of the fibre pay-out eye with geodesic and non-geodesic winding are given.
Abstract: The moving regularity of a winding curved tube on a computer-controlled filament winding machine is discussed in this chapter. Kinematic equations of the fibre pay-out eye with geodesic and non-geodesic winding on a curved tube are given. Winding pattern design of a curved tube and corresponding calculation formulas are presented.
2 citations
TL;DR: In this article, the lifetime spectrum of positron in β-C2S of added Na2O or P2O5 is studied with positron annihilation technique, and the relationship between lifetime spectrum parameters obtained through experiment and the microstructure of β-c2S is discussed.
2 citations
1 citations
1 citations
TL;DR: In this article, the EXAFS of Cu atoms in Na2O-CuO-B2O3 glass systems have been measured in a laboratory EXAFs facility, where gas proportional counter for I0 and scintillation detector for I are used simultaneously to cancel out emission lines and the pulse height discriminator to out off harmornic.
Abstract: The EXAFS of Cu atoms in Na2O-CuO-B2O3 glass systems have been measured in a laboratory EXAFS facility. In order to achieve good EXAFS data, gas proportional counter for I0 and scintillation detector for I are used simultaneously to cancel out emission lines and the pulse height discriminator to out off harmornic. The local structure parameters around Cu atom have been determined by using of a common analysis process for EXAFS data. The monoolinic crystalline CuO is used as a standard specimen. The results show that the coordination number of Cu atom and the length of Cu-O bond in Na2O-CuO-B2O3 glass systems is respectively four and 1.92A as near as those in crystalline CuO. It can be concluded that Cu2+ ions still exist in the glassy network with the form of (CuO4) tetrahedron. The coordination number of Cu atom and the length of Cu-O bond don't change with increased CuO content in the glass.