Subsolidus Conceptual Design of CaO-AI_2O_3-TiO_2-SiO_2 System and Its Significance for Manufacturing Advanced Ceramics

The article deals the structure of the CaO -Al2O3 - TiO2 -SiO2 system as a basis for obtaining advanced ce- ramics with a complex of high-operational characteris- tics. As a result o[＇investigations the phase charctcteristics are represented trod the graph of the relationship of the elementaory tetrahedra has been plotted. The most techno- logical system area ,for the production of heat resistant advanced ceramics has been determined. The batches for producing heat and chemical resistant dense advanced ceramics made of natural, technical and technogenic raw materials have been developed.

量子力学相位问题研究进展

综述量子力学相位问题的背景、产生及进展。最初由Berry提出的适用于线性系统绝热演化的Berry相位受到了局限,在实际应用中,Berry相位被推广到非绝热演化(AA相)、非循环过程(非对角几何相)及非线性系统(一般量子态的几何相位)。指出对于非线性系统非对角几何相的研究是个新的研究课题,并对其研究前景进行展望。