Implementation of complete two-dimensional bandgap in photonic crystals of square Bravais lattice using complex unit cell;

This paper designs a novel type of non-bravais lattice photonic crystal fiber.

Electronic structure characteristics of the twodimensional compound lattice finite clusters;

Electron structure calculation of polyacetylene with the model of the two-dimensional compound lattice finite clusters;

The effect that combined mold can increase the proportion of equiaxial crystal of billet was confirmed by comparing its heat transfer character with that of traditional mold and measuring the macrostructure of the billets produced by these two molds.

The temperature field of the nonmetallic material of combined mold was measured using thermocouples at different place of mold to get the heat flux distribution in mold.

Taking advantage of the selectively crystalline specialty of 2-amino-2-methyl-1-propanol toward isopimaric acid,butanolidine isopimarate(2-amino-2-methyl-1-propanol isopimaric acid salt) was prepared by reacting 2-amino-2-methyl-1-propanol with thermally isomerized slash pine rosin that was freshly prepared from oleoresin or rosin,then purified by multi-recrystallization.