34results about How to "Focus well" patented technology

The invention discloses graphene serving as a cathode of an X-ray tube and an efficient graphene cathode field X-ray tube. The efficient graphene cathode field X-ray tube comprises a cathode assembly, an anode assembly and a vacuum glass tube, wherein the cathode assembly comprises a graphene cathode. The efficient graphene cathode field X-ray tube has the characteristics of high conversion efficiency, less scattered rays, reduced radiation dosage born by a human body in the fields of medical and security check and the like, easy implementation of micro-focus X-ray tube, strong transmitting capacity and high voltage resistance, and can be applied to the fields of semi-conductor detection, industrial flaw detection and the like. The efficient graphene cathode field X-ray tube is good in controllability, free from a heating cathode and instantaneous to transmit, and the number of electronic emissions is controlled by adjusting the grid voltage, so that the tube current is controlled. The efficient graphene cathode field X-ray tube further has the characteristics of good stability and long service life.

The invention discloses a laser path of a laser welding point, and a laser welding method. The laser welding method comprises the steps of fixing a product to be welded onto a two-dimensional platformthrough a fixture, utilizing a pulse laser for scanning welding a welding point in a welding area of the product to be welded, and dividing a laser scanned path graph of the welding point into threesegments, wherein the first segment is a straight-line segment or a curved segment, the second segment is formed by multiple reciprocating disjoint straight-line segments or curved segments, startingpoints of each two adjacent straight-line segments or curved segments are connected through a transition segment, the third segment is a straight-line segment or a curved segment, and the first segment, the second segment and the third segment are sequentially connected; and crossing the straight-line segments or the curved segments of the first segment and the second segment, crossing the straight-line segments or the curved segments of the third segment and the second segment, and during a laser scanning welding process, blowing a protection gas to the welding point. According to a speciallyedited point-shaped welding graph, a thin slice is welded through a single-pulse superposition track manner, multiple small molten pools are formed in the thin slice material, and the welding point with a large tensile force is obtained.

The invention discloses a cloud drawing-based large-sized three-dimensional scene multi-person collaborative creation method, which relates to the field of three-dimensional visual scene creation and edition. The method comprises the following two major modules, i.e., a server and a client, wherein the server is an assembly consisting of a plurality of computers; the host in the assembly is divided into a scheduling host and a drawing host; the scheduling host is responsible for solving the problems of synchronization and mutual exclusion produced by editing the same three-dimensional scene by a plurality of users and distributing a drawing task to the drawing host; the drawing host is used for drawing a scene into an image according to visual angles of the users and transmitting to the corresponding client host; and the client host is used for providing an operation interface for three-dimensional scene creation. According to the method, combination of creation results of all the users is creatively and automatically finished at the server, and help can be provided for the users to observe the creation results of all the users in real time during creation; and the method has positive significance to multi-person collaborative creation of a super-large-sized scene.

The invention discloses a face anti-spoofing recognition method based on action enhancement. It belongs to the technical field of digital image processing. The present invention enhances the action information input into the CNN+LSTM network video through the action enhancement technology. In addition, in order to overcome the defect of missing position information in the existing CNN+LSTM framework, the present invention adds the LSTM structure behind the last pooling layer, and Remove the fully connected layer to achieve the purpose of retaining position information, so that the extracted sequence features are more distinguishable; at the same time, the present invention also adds an attention mechanism to the improved framework, and by setting the position confidence matrix, the position changes significantly The increase of the regional confidence value makes LSTM more focused on the area where the action information is concentrated.

The invention provides a light filter with multiple strobe modes and high beam quality. The light filter comprises a first dispersion element, a second dispersion element, a light filter element, a controller, a beam inlet and a beam outlet, wherein the first dispersion element is used for diverging initial beams to divergent beams and used for restoring strobe beams; the second dispersion element is used for converging the divergent beams to parallel beams and converging the strobe beams; the light filter element is used for performing strobe on beams with required wavelengths from the parallel beams from the second dispersion element to obtain strobe beams and reflecting the strobe beams to the second dispersion element; the controller is used for controlling the light filter element to perform strobe on the beams with required wavelengths; the beam outlet and the beam inlet are used for controlling incidence of the initial beams to the first dispersion element and controlling the strobe beams restored by the first dispersion element to be shot outside the light filter. The light filter can perform second-order dispersion compensation, has four strobe modes of long pass, short pass, band pass and band stop, and has adjustable wavelengths.

The invention discloses a coloring method and device based on the surface coloring technology of the metal material. According to the oxidability characteristic of the to-be-processed material, the material to be processed is heated through the low-power laser, the auxiliary oxidizing gas is used as an oxidizing agent, rapid controllable oxidation reaction of a to-be-processed region material andan oxidizing agent can be achieved by utilizing instant high temperature generated by low-power nanosecond pulse laser, the laser enables the surface of the material to be subjected to controllable oxidation, so that a transparent or semitransparent oxide layer thin film can be generated; and according to the photochemical effect and the thin film interference effect, different colors can be displayed on the surface of the processed material due to the fact that different laser parameters are selected. By means of the method and device based on the surface coloring technology of the metal material, coloring processing of the surfaces of materials such as titanium alloys or the surfaces of jewelry can be realized, the effect of protecting the internal metal is achieved, and the wear resistance and the corrosion resistance of metal or jewelry can be improved.

A technological method for straightening a shaft by a laser cladding technology includes 1), detecting a bent portion and a bent direction of a shaft part; 2), machining a cladding groove at a high point of the bent position of the shaft or a machinable high point of the shaft; (3), straightening the cladding groove by means of laser cladding; 4), removing residual stress on the surface which is subjected to laser cladding after the shaft part is thoroughly cooled; 5), detecting a jumping value of the shaft again to determine whether the shaft needs to be subjected to laser cladding again or not; and 6), machining and polishing the surface which is subjected to laser cladding to guarantee the precision of the shaft after the shaft is repaired. The technological method has the advantages that contact machining is omitted, abrasion of tools is prevented, laser beams can be guided and focused easily and are high in energy density, the machining speed is high, a heat affected zone is small, follow-up machining workload is low, the method can be used with a numerical control system easily to realize automation, and particularly, the shortcoming that deformation of a shaft cannot be precisely controlled by means of changing technological parameters to straighten the shaft by laser in the prior art is overcome.

A vehicle seat comprising a seat part extending in the vehicle longitudinal direction (X) and in the vehicle transverse direction (Y) and including a backrest part is provided. The vehicle seat includes a seat substructure for suspending and / or damping at least the seat part with respect to the body of a vehicle. The seat substructure comprises at least one horizontal suspension device that includes a body-side lower part and a seat-part-side upper part displaceable with respect thereto. A coupling device is arranged interactively between the seat-part-side upper part and the body-side lower part, and includes a deformable suspension element as a first coupling element and a bearing and deformation device as a further coupling element.

The invention relates to a laser welding method of a high-strength gas discharge electrode. A mandril and an electrode spring enter a fixture through a blanking mechanism respectively and the electrode spring is clamped on the mandril, the mandril and the electrode spring are placed at a laser generator and are welded through laser, and the electrode spring is fixed on the mandril, so that the high-strength gas discharge electrode is obtained, and automatic blanking is performed after inspection. Compared with the prior art, the laser energy can be stably controlled, the product welding consistency is good, the quality is guaranteed, the product consistency is guaranteed to the greatest extent, and two articles are molten mutually after welding, so that the product strength after hydrogen burning is better.

The invention provides an all-optical fiber input-output-interface monochromator. The all-optical fiber input-output-interface monochromator includes the following components of: an input optical fiber used for inputting incident light, a high-pass linear variable filter which is used for reflecting short-wave light beams in the incident light, the wavelength of the short-wave light beams being shorter than selected wavelength; a low-pass linear variable filter which is used for reflecting long-wave light beams in the incident light, the wavelength of the long-wave light beams is longer than the selected wavelength; a first optical focusing element which is located in a light path and focuses the incident light; a second optical focusing element which is located in the light path and focuses light beams which pass through the low-pass linear variable filter or high-pass linear variable filter; an optical reflecting and focusing element assembly which is used for reflecting and focusing light beams which pass through the high-pass variable filter and the low-pass linear variable filter; a linear variable filter control system which is used for controlling the movement of the high-pass variable filter and the low-pass linear variable filter so as to make the linear variable filters located at specified positions and realize monochromatic filtering; and an output optical fiber which is used for outputting long-wave, short-wave and narrowband monochromatic light.