Abstract: A video recognition method and apparatus and storage medium are disclosed. In the method, n first eigenvectors corresponding to each of m first image frames of a first video is determined; the first eigenvector represents a spatial eigenvector of the corresponding first image frame; a second eigenvector is extracted from the first eigenvectors, and the second eigenvector is processed through a fully connected layer to obtain a third eigenvector; the second eigenvector represents a time sequence eigenvector corresponding to the m first image frames; a first behavior type between first and second object corresponding to the first video is determined based on the third eigenvector; each element in the third eigenvector represents probability of a behavior type; and when the first behavior type is a set behavior type, a video recognition result of the first video is determined based on the first behavior type and type of the second object.

Abstract: Provided are a metallic micro/nano-structure and an optical fiber having it on the end-facet. The metallic micro/nano-structure comprises of a metallic film and a micro/nano pattern in the metallic film. The micro/nano pattern divides the metallic film into a periodic structure and an embedded defect structure; the defect structure locally breaks the periodicity of the periodic structure; in at least one dimension, the periodic structure has a period T satisfying 0.75?<T<1.25?, ? is a wavelength of a surface plasmon at an interface between the metallic film and a medium; and the surface plasmon resonates within the defect structure and its surrounding area. The optical fiber end-facet device takes the advantages of single-mode optical fiber systems, including stable optical transmission, compact systems and flexible configurations.

Abstract: Provided are a metallic micro/nano-structure and an optical fiber having it on the end-facet. The metallic micro/nano-structure comprises of a metallic film and a micro/nano pattern in the metallic film. The micro/nano pattern divides the metallic film into a periodic structure and an embedded defect structure; the defect structure locally breaks the periodicity of the periodic structure; in at least one dimension, the periodic structure has a period T satisfying 0.75?<T<1.25?, ? is a wavelength of a surface plasmon at an interface between the metallic film and a medium; and the surface plasmon resonates within the defect structure and its surrounding area. The optical fiber end-facet device takes the advantages of single-mode optical fiber systems, including stable optical transmission, compact systems and flexible configurations.