Abstract: The present disclosure relates to a beam measuring device, a sample processor including the beam measuring device, and a method of measuring a beam using the beam measuring device. The beam measuring device includes a detection unit and a light impediment unit. The light impediment unit is located between the detection unit and a light source, and is configured to generate a shadow area on the detection unit by blocking transmission of part of a beam coming from the light source. The detection unit is configured to measure the shadow area, and to determine whether the beam is divergent or inclined with respect to a predetermined optical axis based on the measurement of the shadow area. The beam measuring device may shorten the optical detection channel and ensure the detection accuracy, thereby having a compact structure. In addition, the beam measuring device may measure divergence angle and directionality, respectively.

Abstract: A method for preparing a graphene-coated powder material, comprising: A) dispersing a graphene powder and/or graphene oxide powder, a powder material to be coated with graphene, and a polymeric co-coating agent in a first organic solvent to form a first organic solvent dispersion; B) mixing the first organic solvent dispersion with a second organic solvent and separating a precipitate after sedimentation; and C) annealing the precipitate in an inert atmosphere to obtain the graphene-coated powder material; wherein the polymeric co-coating agent is soluble in the first organic solvent but insoluble in the second organic solvent. The present invention also relates to a graphene-coated powder material prepared by the method.

Abstract: A multilayered rail guide vehicle system for use in three-dimensional planting in a plant factory and a control method therefor, the system includes an upper computer, cultivation shelves, traveling devices, lifting devices, and an electric control system. The traveling devices and the lifting devices are arranged in a body of a rail guide vehicle. The upper computer is in wireless communication with the electric control system. A nutrient solution tank is arranged on each of the cultivation shelves, and a plurality of cultivation positions are arranged on the nutrient solution tank. The electric control system is arranged in the body of the rail guide vehicle, so as to obtain an operation mode and target information after receiving a task instruction transmitted by the upper computer, select and switch a positioning mode, and drive the traveling devices and the lifting devices to perform traveling and lifting positioning according to operation procedures.

Abstract: An aluminum laminated packaging film, and lithium-ion battery using same. The aluminum laminated film (1) comprises an aluminum layer (12), a graphene layer (14), and a sealing layer (13) in sequence. The graphene layer (14) comprises graphene sheets and a thermoplastic polymer adhesive. The platelet structure of the graphene and irregular arrangement of the graphene enable locations between sheets to form indirect and complex paths, creating a huge barrier for lithium ions moving toward the aluminum layer, thus preventing the lithium ions from forming aluminum-lithium alloy with the metal aluminum, and avoiding corrosion of the aluminum layer (12).

Abstract: A method for preparing a graphene-coated powder material, comprising: A) dispersing a graphene powder and/or graphene oxide powder, a powder material to be coated with graphene, and a polymeric co-coating agent in a first organic solvent to form a first organic solvent dispersion; B) mixing the first organic solvent dispersion with a second organic solvent and separating a precipitate after sedimentation; and C) annealing the precipitate in an inert atmosphere to obtain the graphene-coated powder material; wherein the polymeric co-coating agent is soluble in the first organic solvent but insoluble in the second organic solvent. The present invention also relates to a graphene-coated powder material prepared by the method.

Abstract: Provided is a method for preparing a graphene/ternary material composite for use in lithium ion batteries, comprising the following preparation steps: (a) mixing a ternary material and a graphene oxide powder in an organic solvent to form a mixed dispersion; (b) adding a reducing agent to the mixed dispersion from step (a), and carrying out a reduction reaction at a reduction temperature of 80-160° C. while stirring, to obtain a reduction reaction mixture after a reduction time of 60-240 min; and (c) evaporating the solvent from the reduction reaction mixture from step (b) while stirring, and drying and then annealing the mixture at a low temperature in an inert atmosphere to obtain a graphene/ternary material composite having a three-dimensional network structure. Also provided is a graphene/ternary material composite prepared by using this method.

Abstract: Present invention provides a high-precision pressure sampling head used in a Pitot tube flow sensor. The pressure sampling head includes a cylindrical pressure sampling head body. The cylindrical pressure sampling head body contains a total pressure channel and a static pressure channel. The axis of the total pressure channel and the axis of the static pressure channel are parallel to the axis of the cylindrical pressure sampling head body. Two inclined surfaces are formed on two opposite sides of the lower end of the cylindrical pressure sampling body. A first inclined surface intersects with the total pressure channel and thus a total pressure sensing hole is formed on the first inclined surface. A second inclined surface intersects with the static pressure channel and thus a static pressure sensing hole is formed on the second inclined surface.