Highly ordered Bi4Si3O12 micro-crystals were prepared at normal atmosphere.Phase identification of the prepared crystals was accomplished by X-ray diffractometer(XRD).Domain structure and defects were characterized by...Highly ordered Bi4Si3O12 micro-crystals were prepared at normal atmosphere.Phase identification of the prepared crystals was accomplished by X-ray diffractometer(XRD).Domain structure and defects were characterized by environmental scanning electron microscopy(ESEM).XRD shows that the obtained micro-crystals are of eulytite structure with chemical formulation of Bi4Si3O12.A highly ordered growth pattern is confirmed due to the faster growth of the{124}faces than that of the{204}faces by ESEM.The growing process of the domain structure is of pollen parent and filial generation pattern.The filial generations of Bi4Si3O12 crystals are generated from the pollen parent.Cracks generate from the defect areas and propagate along the{124}faces due to their lower binding energy under a proper temperature gradient,contributing to the total transcrystalline fracture.It is confirmed that the generation and development of the voids in the crystal grains can be developed when unmatched dimensions of the two opposite faces are formed.And the development of the voids is dependent on the dimensions and orientations of the two opposite faces.展开更多
Dear Editor,This letter proposes the graph tensor alliance attention network(GT-A^(2)T)to represent a dynamic graph(DG)precisely.Its main idea includes 1)Establishing a unified spatio-temporal message propagation fram...Dear Editor,This letter proposes the graph tensor alliance attention network(GT-A^(2)T)to represent a dynamic graph(DG)precisely.Its main idea includes 1)Establishing a unified spatio-temporal message propagation framework on a DG via the tensor product for capturing the complex cohesive spatio-temporal interdependencies precisely and 2)Acquiring the alliance attention scores by node features and favorable high-order structural correlations.展开更多
基金Supported by the Innovation Research Team Funds of Shaanxi University of Science&Technology(Grant No.SUST-A04)
文摘Highly ordered Bi4Si3O12 micro-crystals were prepared at normal atmosphere.Phase identification of the prepared crystals was accomplished by X-ray diffractometer(XRD).Domain structure and defects were characterized by environmental scanning electron microscopy(ESEM).XRD shows that the obtained micro-crystals are of eulytite structure with chemical formulation of Bi4Si3O12.A highly ordered growth pattern is confirmed due to the faster growth of the{124}faces than that of the{204}faces by ESEM.The growing process of the domain structure is of pollen parent and filial generation pattern.The filial generations of Bi4Si3O12 crystals are generated from the pollen parent.Cracks generate from the defect areas and propagate along the{124}faces due to their lower binding energy under a proper temperature gradient,contributing to the total transcrystalline fracture.It is confirmed that the generation and development of the voids in the crystal grains can be developed when unmatched dimensions of the two opposite faces are formed.And the development of the voids is dependent on the dimensions and orientations of the two opposite faces.
基金supported in part by the National Natural Science Foundation of China(62372385).
文摘Dear Editor,This letter proposes the graph tensor alliance attention network(GT-A^(2)T)to represent a dynamic graph(DG)precisely.Its main idea includes 1)Establishing a unified spatio-temporal message propagation framework on a DG via the tensor product for capturing the complex cohesive spatio-temporal interdependencies precisely and 2)Acquiring the alliance attention scores by node features and favorable high-order structural correlations.
