Abstract: A method for obtaining semiconducting carbon nanotubes is provided. An insulating substrate comprising hollow portions and non-hollow portions is provided. A plurality of electrodes is formed on a surface of the non-hollow portions. A plurality of carbon nanotubes is formed on a surface of the insulating substrate, and the carbon nanotubes stretches across the hollow portions. The insulating substrate, the plurality of electrodes, and the carbon nanotubes are placed into a cavity, and the cavity is evacuated. A voltage is applied between any two electrodes, and photos of carbon nanotubes suspended between the two electrodes are taken. In the photo, darker ones are the semiconducting carbon nanotubes, and brighter ones are metallic carbon nanotubes. Finally, the metallic carbon nanotubes are removed.

Abstract: A freeform surface imaging spectrometer system including a primary mirror, a secondary mirror, a tertiary mirror, and a detector is provided. The secondary mirror is a grating having a freeform surface shape, and the grating having the freeform surface shape is obtained by intersecting a set of equally spaced parallel planes with a freeform surface. A plurality of feature rays exiting from a light source is successively reflected by the primary mirror, the secondary mirror and the tertiary mirror to form an image on an image sensor. A reflective surface of each of the primary mirror, the tertiary mirror surface and the tertiary mirror is an xy polynomial freeform surface.

Abstract: The present disclosure relates to a data processing method and device. The data processing method comprises steps of: performing detector response calibration based on a detector response obtained by an incidence of rays with known energy into a detector to obtain a detector response model; obtaining a photon counting model of the detector between incident energy spectrum data of the detector and detected energy spectrum data of the detector based on the detector response model; and performing a deconvolution operation on counts of photons in respective energy regions in the detected energy spectrum data of the detector based on the photon counting model of the detector, to obtain real counts of photons in respective energy regions in the incident energy spectrum data of the detector.

Abstract: The present disclosure provides a method and an apparatus for processing concurrent transactions, and a non-transitory computer readable storage medium. The method includes: determining whether a two-dimensional digraph for a set of concurrent transactions has a cyclic structure, wherein the set of concurrent transactions comprises a transaction to be committed and at least one committed transaction, the two-dimensional digraph comprises a plurality of nodes corresponding respectively to the transactions in the set, and directed edges between the nodes of the two-dimensional digraph indicate a serializability relation among the transactions in the set; aborting the transaction to be committed if it is determined that the two-dimensional digraph has the cyclic structure; and committing the transaction to be committed if it is determined that the two-dimensional digraph does not have the cyclic structure. Embodiments of the present disclosure can improve the performance of a concurrent system.

Abstract: The present disclosure provides a smart lock, including: a lock body and an unlocking structure; a Bluetooth communication module configured to receive a lock instruction or an unlock instruction based on Bluetooth communication; and one or more binding tags, each binding tag being associated with a Bluetooth address of the smart lock, wherein the unlocking structure is configured to lock or unlock the smart lock based on the lock instruction or the unlock instruction, or lock or unlock the smart lock based on an operation performed for the one or more binding tags. The present disclosure further provides a system and method for monitoring an object equipped with the smart lock.

Abstract: The present disclosure provides a scanned image correction apparatus, method and a mobile scanning device. The apparatus includes an image collector, an arm swing detector, and an image processor. The image collector is configured to collect a scanned image of an object under inspection during a scanning process of scanning the object under inspection by the mobile scanning device, and determine an image parameter of the scanned image. The arm swing detector is disposed at a monitor point on a detector arm of the mobile scanning device, and configured to detect a displacement offset of the detector arm in a specified direction and build an arm swing model of the detector arm. The image processor is configured to determine a change relationship between the image parameter of the scanned image and the displacement offset of the detector arm, and correct the scanned image based on the change relationship.

Abstract: Provided are a three-dimensional reconstruction method, apparatus and system of a dynamic scene, a server and a medium. The method includes: acquiring multiple continuous depth image sequences of the dynamic scene, where the multiple continuous depth image sequences are captured by an array of drones equipped with depth cameras; fusing the multiple continuous depth image sequences to establish a three-dimensional reconstruction model of the dynamic scene; obtaining target observation points of the array of drones through calculation according to the three-dimensional reconstruction model and current poses of the array of drones; and instructing the array of drones to move to the target observation points to capture, and updating the three-dimensional reconstruction model according to multiple continuous depth image sequences captured by the array of drones at the target observation points.

Abstract: A method of making microstructures, including: setting a photoresist layer on a surface of a base; covering a surface of the photoresist layer with a photolithography mask plate, wherein the photolithography mask plate includes: a substrate; a carbon nanotube composite structure on a surface of the substrate, wherein the carbon nanotube composite structure includes a carbon nanotube layer and a chrome layer coated on the carbon nanotube layer; and a cover layer on the carbon nanotube composite structure; exposing the photoresist layer to form an exposed photoresist layer by irradiating the photoresist layer through the photolithography mask plate with ultraviolet light; and developing the exposed photoresist layer to obtain a patterned photoresist microstructures.

Abstract: A method of making microstructures, including: setting a photoresist layer on a base; covering the photoresist layer with a photolithography mask plate, wherein the photolithography mask plate includes: a substrate; a carbon nanotube layer on the substrate; a patterned chrome layer on the carbon nanotube layer so that the carbon nanotube layer is sandwiched between the patterned chrome layer and the substrate, wherein a first pattern of the patterned chrome layer is the same as a second pattern of the carbon nanotube layer; a cover layer on the patterned chrome layer; exposing the photoresist layer to form an exposed photoresist layer by irradiating the photoresist layer through the photolithography mask plate with ultraviolet light; and developing the exposed photoresist layer to obtain a patterned photoresist microstructures.

Abstract: A channel baffle structure comprises a pipe, a swing check plate and a driving apparatus, wherein the main part of the swing check plate is located inside the pipe, and the driving apparatus is disposed outside the pipe. A connection structure is used for connecting the driving apparatus and the swing check plate. The check plate can be opened and closed passively by gravity and fluid pressure, but can also be actively opened and closed by the driving apparatus, such that requirements for multiple operating conditions of the channel can be satisfied.

Abstract: A biosensor electrode, comprising: a porous metal structure; and a carbon nanotube structure comprising a plurality of carbon nanotubes, the carbon nanotube structure is fixed on a surface of the porous metal structure, wherein the porous metal structure and the carbon nanotube structure are shrunk together to form a plurality of wrinkled parts.

Abstract: There are disclosed a collimator, a radiation emitting assembly and an inspection apparatus. The collimator is configured to collimate radiation from a radiation emitter. One of the collimator and the radiation emitter is provided with a protrusion portion and the other is provided with a recess portion such that the protrusion portion is capable of being placed within the recess portion and the radiation emitter and the collimator are allowed to be arranged close to and connected with each other, and that the radiation passes through passages in the protrusion portion and the recess portion from the radiation emitter to the collimator.

Abstract: A method for forming an aluminum matrix composite is provided. At least one reinforcement layer and an aluminum layer are provided. The at least one reinforcement layer is disposed on at least one surface of the aluminum layer to form a first composite structure. The first composite structure is pressed to form a second composite structure. A process of alternatively folding and pressing the second composite structure is repeated to form the aluminum matrix composite.

Abstract: A method of making microstructures, including: setting a photoresist layer on a surface of a base; covering a surface of the photoresist layer with a photolithography mask plate, wherein the photolithography mask plate includes: a substrate; a patterned chrome layer on a surface of the substrate; a carbon nanotube layer on the patterned chrome layer, wherein a first pattern of the patterned chrome layer is the same as a second pattern of the carbon nanotube layer; a cover layer on the carbon nanotube layer; exposing the photoresist layer to form an exposed photoresist layer by irradiating the photoresist layer through the photolithography mask plate with ultraviolet light; and developing the exposed photoresist layer to obtain a patterned photoresist microstructures.

Abstract: The present disclosure relates to a method and a device for simulating discharge, and a computer device. The method includes steps of: acquiring forcing data; simulating the discharge of a river basin to be measured according to the forcing data and a calibrated hydrological model of the river basin, to obtain a simulated discharge of the river basin; the calibrated hydrological model is a hydrological model including calibrated model parameters; the calibrated model parameters are obtained by calibrating model parameters of an initial hydrological model, according to a converted discharge of the river basin to be measured and the GRACE-derived total water storage changes of the river basin to be measured.

Abstract: A sampling probe, an automatic sampling device, and a container detection system are provided. The sampling probe includes: a mounting base; a housing mounted on the mounting base, a first accommodation chamber having an opening being defined in the housing, and an exhaust hole in communication with the first accommodation chamber and outside of the housing being formed in the housing; a coupling portion formed on an outer edge of the opening of the first accommodation chamber and formed to be hermetically coupled with an air outlet of a container; and a suction device mounted on the housing and configured to suck gas in the container into the first accommodation chamber through the air outlet. The sampling probe may collect the odor of toxic and harmful gases/hazardous chemicals inside the container at the air outlet of the container, without destroying the overall structure of the container.

Abstract: A plane source blackbody is provided. The plane source blackbody comprises a panel, a black lacquer, and a carbon nanotube layer. The panel comprises a first surface and a second surface, and the first surface is opposite to the second surface. The black lacquer is located on the first surface. The carbon nanotube layer is located on a surface of the black lacquer away from the first surface. A method of making the plane source blackbody is also provided.

Abstract: A composite structure with porous metal comprises a porous metal structure and a carbon nanotube structure comprising a plurality of carbon nanotubes, the carbon nanotube structure is fixed on surface of the porous metal structure, and the porous metal structure and the carbon nanotube structure are shrunk together to form a plurality of wrinkled parts.

Abstract: A tomographic imaging and image-guided radiation therapy apparatus comprises: a high-energy ray source, at least one KV ray source, a first PET detector, a second detector, and a CT detector. The KV ray source is placed on or at an inner side of or at outer side of the first PET detector; the second PET detector and the CT detector are configured to receive the KV ray to perform a KV CT imaging; the first and the second PET detectors are further configured to receive a gamma ray emitted by an object to perform a PET imaging; the high-energy ray source is configured for radiation therapy of the object; the KV CT imaging and/or the PET imaging are configured to assist and/or guide the radiation therapy of the object.

Abstract: A method for preparing a carbon-coated ternary positive electrode material has steps of preparing a ternary positive electrode material precursor, and preparing a suspension of the ternary positive electrode material precursor. Lithium acrylate is added to the suspension of the ternary positive electrode material precursor according to the molar ratio of Li:(Ni+Co+Mn) being 1.03-1.05:1. Ammonium persulphate is added to the lithium acrylate-containing suspension of the ternary positive electrode material precursor, so that the lithium acrylate undergoes a polymerisation reaction and a suspension of a lithium polyacrylate-coated ternary positive electrode material precursor is obtained. The suspension of the lithium polyacrylate-coated ternary positive electrode material precursor is dried to obtain spherical particles. The lithium polyacrylate-coated ternary positive electrode material precursor particles are sintered to obtain a carbon-coated ternary positive electrode material.