Abstract: A preparation method and a product of a metal-matrix composite reinforced by nanoscale carbon materials are provided, including: plating metal layers on surfaces of the nanoscale carbon materials, and then adding mental particles to perform ball milling for dispersion and sintering. Volumes of the nanoscale carbon materials account for 0.01% to 30% of the metal-matrix composite. Size requirements of the nanoscale carbon materials and the metal particles are that: K×a sum of maximum cross-sectional areas of the nanoscale carbon materials in a unit volume?a sum of surface areas of the mental particles in the unit volume; and the K represent a space compensation coefficient. The method is practical and effective, and the nanoscale carbon materials are efficiently and uniformly dispersed in metallic matrix. The obtained composite further has excellent mechanical, electrical and thermal properties, and is applied in metal-matrix composites, nano-electronic components, and biosensors.

Abstract: The present invention provides a kind of an integrated sewage treatment equipment for paper mill, which belongs to the technical field of sewage treatment, includes a box body, and the box body is arranged a water injection gap on the upper part at one side, the bottom of the box body is connected with a drainage pipe, and a filter assembly is arranged inside the box body movably, and the inner wall of the box body is equipped with a limit component which provides guidance for the movement of the filter assembly; the filter assembly includes several concentrically arranged annular plates, and two adjacent groups of annular plates are connected by a netting. The bottom of the annular plate is equipped with a chemical dosing component, and the inner side of the innermost annular plate is equipped with an adapter sleeve.

Abstract: The disclosure provides a nanolaser based on a depth-subwavelength graphene-dielectric hyperbolic dispersive cavity, comprising a pumping light source and the depth-subwavelength graphene-dielectric hyperbolic dispersive cavity; wherein the depth-subwavelength graphene-dielectric hyperbolic dispersive cavity is a spherical or hemispherical hyperbolic dispersive microcavity formed by alternately wrapping a dielectric core with graphene layers and dielectric layers.

Abstract: The disclosure provides a nanolaser based on a depth-subwavelength graphene-dielectric hyperbolic dispersive cavity, comprising a pumping light source and the depth-subwavelength graphene-dielectric hyperbolic dispersive cavity; wherein the depth-subwavelength graphene-dielectric hyperbolic dispersive cavity is a spherical or hemispherical hyperbolic dispersive microcavity formed by alternately wrapping a dielectric core with graphene layers and dielectric layers.