D in the upper truncated power-law function is closely associated with the degree of confinement during ice breakup. Its decrease with the distance into MIZ indicates the weakening of confinement conditions on floes owing to wave attenuation. The g of the Weibull distribution characterizes the degree of homogeneity in a data set. It also decreases with distance into MIZ, implying that floe size distributes increase in range. Finally, a statistical test on floe size is performed to divide the whole MIZ into three distinct zones made up of floes of quite different characteristics. This zonal structure of floe size also agrees well with the trends of floe shape and floe size distribution, and is believed to be a straightforward result of wave-ice interaction in the MIZ.

Porous lead zirconate titanate (PZT95/5) ceramics were prepared by adding pore formers. Effects of pore structure including porosity, pore size and pore shape on the dielectric breakdown properties of porous PZT95/5 ceramics and their mechanism were investigated. The research showed that the dielectric breakdown voltage of porous PZT95/5 ceramics decreases with increasing porosity and pore size. The dielectric breakdown voltage of porous PZT95/5 ceramics with spherical pores is higher than that with irregular pores. The series pore model, pore discharge model and the regional discharge of oval pore theory were used to explain how pore structure affects dielectric breakdown properties of porous PZT95/5 ceramics.

We report the first nuclear magnetic resonance (NMR) study on single crystals of staircase Kagomé antiferromagnet PbCu 3 TeO 7 (T N1~3 6 K). A Curie constant Θ~-140 K is obtained by a Curie-Weiss fit to the high-temperature Knight shift of 125 Te. The hyperfine coupling constant is estimated as 125 A hf = -67 kOe/μ B , and a strong interlayer coupling among staircase Kagomé planes is suggested with such a large hyperfine