Abstract: In a fracturing control apparatus, a first chemical agent storage tank is connected with a first delivery pump, and a material outlet of the first delivery pump communicates with a first position of a first fracturing fluid conveying pipeline. An outlet of the first fracturing fluid conveying pipeline communicates with an inlet of a fracturing pump, an outlet of the fracturing pump communicates with an inlet of a second fracturing fluid conveying pipeline, and a first flow detector is arranged at a second position of the second fracturing fluid conveying pipeline. The first delivery pump is connected with a first output interface of a controller, and the first flow detector is connected with a first input interface of the controller. The fracturing control apparatus and the control method of the fracturing control apparatus are used for adding chemical agents into fracturing fluids.

Abstract: Systems, methods and media for calibrating structured light camera systems are provided. In some examples, a system comprises: a light source; a first camera comprising: a first image sensor; and a first lens; a second camera comprising: a second image sensor; and a second lens; and a processor programmed to: receive, from the first and second image sensors, first images of a predetermined first pattern presented on a flat panel display; calibrate the first and second cameras using the first images and features of the predetermined first pattern; cause the light source to emit a series of second patterns toward a scene including a flat surface; receive, from image sensors, second images of the series of second patterns; and calibrate the light source using the second images and features of the series of second patterns.

Abstract: A volume measurement method and apparatus using a depth camera, and a computer-readable medium, are provided. A first depth image of a reference countertop is acquired which includes coordinate and depth data of pixels, the reference countertop adapted for placement of a measured object. The coordinate and depth data are substituted into countertop empirical equations to obtain simulated images. Each of the countertop empirical equations represent a height variation pattern of the reference countertop. A correlation between each of the simulated images and the first depth image is calculated. A simulated image with the highest correlation is used as a target image of the reference countertop. A countertop height of the reference countertop is obtained based on the target image, a height of the measured object is calculated using the countertop height, and a volume of the measured object is calculated using the height. These disclosures improve accuracy of object volume measurement.

Abstract: A display module includes a flexible display panel, a base layer and a sound wave driving structure. The panel includes at least one bending area and at least two non-bending areas. The base layer is on a non-display side of the panel. The sound wave driving structure is between the panel and the base layer, and includes a first electrode layer and a second electrode layer, the first electrode layer is closer to the panel than the second electrode layer, and the first electrode layer and the second electrode layer have a gap therebetween. An orthographic projection of at least one of the first electrode layer and the second electrode layer on the panel is non-overlapping with the bending area; and/or the sound wave driving structure further includes an insulating spacing layer, and an orthographic projection of the insulating spacing layer on the panel is in the bending area.

Abstract: A welding method for manufacturing a heat sink has the following steps in sequence: removing rust from a first workpiece and a second workpiece, degreasing the first workpiece and the second workpiece, increasing surface roughness of the first workpiece and the second workpiece, performing a copper supersonic cold spray step to the first workpiece and the second workpiece, and then combining the first workpiece and the second workpiece via welding. With the copper supersonic cold spray step and the surface treatment steps before the copper supersonic cold spray step (i.e. rust removal and degreasing, and surface roughness increasing), the solder can be attached to the workpiece tightly in the combining via welding. Thus, the welded workpieces are combined firmly and not be separated easily. If a heat sink component is made through welding workpieces in the welding method, the heat sink component has higher strength and cannot be destroyed easily.

Abstract: Systems and methods of large depth-of-field microscopic structured-light 3D imaging include and/or implement capturing a plurality of images of a scene using a plurality of focus settings, each of the plurality of images corresponding to one of the plurality of focus settings, the plurality of images corresponding to a focal stack; processing the plurality of images; merging the plurality of images into an all-in-focus phase map; and reconstructing a 3D shape of the scene based on the all-in-focus phase map.

Abstract: A forming method for a floating contact hole, and a semiconductor device. The method comprises: obtaining a substrate, and forming a tunnel oxide layer and a plurality of gates on the substrate; forming a metal silicide barrier layer; forming a self-aligned metal silicide; forming an interlayer dielectric layer; performing photoetching on the interlayer dielectric layer to obtain a photoresist pattern, the photoresist pattern comprising a small adhesive strip in the middle of the floating contact hole; and etching the floating contact hole by using the photoresist pattern as an etching mask layer.

Abstract: A thermocouple sensing structure for measurement of a temperature distribution inside of a vessel (10) filled fully or partially with multi-phase fluid consisting of residue oil, hydrogen, cracked oil/gas products, sulfur, catalyst particles or catalyst droplets, etc., the thermocouple sensing structure consists of a support structure (1) and a number of thermocouple sensing elements (3), the thermocouple sensing elements (3) are partially or fully covered by the support structure (1), and wherein the closed tip (3B,3C,3D,3M) of the thermocouple sensing element (3) is passed through the support structure (1) to the inside of the vessel (10). And a support structure (1) for fixation of a thermocouple sensing element (3) in a vessel (10), in particular suitable for use in thermocouple sensing structure, the support structure (1) has a protection portion for protection of at least a lower portion of at least one thermocouple sensing element (3) relative to an upward flow direction of a fluid in the vessel (10).

Abstract: These disclosures provide a filtering method and control apparatus for a load cell. The method includes: filtering, by using a plurality of filtering units, first weighing data obtained by the load cell to obtain a plurality of pieces of second weighing data, where the filtering units have different settling times. Obtaining a fluctuation index of each piece of second weighing data, and establishing a correspondence between a fluctuation index and a settling time of each filtering unit. Determining a target filtering unit based on the correspondence according to a weighing requirement, where a fluctuation index of the target filtering unit matches a target precision in the weighing requirement, and a settling time of the target filtering unit matches a target speed in the weighing requirement. The method and apparatus disclosed improves speed and user experience in a weighing process.

Abstract: Provided is a display device. The display device includes: a first housing and a second housing, wherein the first housing and the second housing are slidably connected; a spool, disposed in the second housing, wherein the spool includes a central spindle and at least two reels; a flexible display panel, including a first portion and a second portion, wherein the first portion is fixedly connected to the first housing, and the second portion is wound on the spool; and a sliding support, disposed in the second housing, wherein the sliding support includes a first connection and at least two adsorption portions.

Abstract: A hysteresis compensation method, in which a hysteresis error is calculated for an obtained weighing value by means of an ideal hysteresis error model, and an ideal compensation value is further calculated by means of an ideal hysteresis compensation model, wherein by using a proportional relationship between a system hysteresis error model established in hysteresis calibration and the ideal hysteresis error model, the ideal compensation value is corrected to a final compensation value. The method establishes a mapping relationship between the system's own hysteresis compensation and the ideal state hysteresis compensation, and realizes the transformation of a complicated hysteresis error compensation situation into an ideal hysteresis error compensation situation. The method not only has a good compensation effect for the hysteresis error compensation under ideal situations, but also can obtain an excellent hysteresis compensation effect under complicated hysteresis situations.

Abstract: A positioning member, a winding device for an electrode assembly, and a battery manufacturing device are disclosed in the present application. The positioning member may be used for being inserted into a first groove on an outer peripheral surface of the winding pin, which may be used for winding an electrode sheet and a separator. The positioning member may be provided with a second groove, which may be configured for a clamping pin to insert so as to position relative positions of the first groove and the clamping pin.

Abstract: An electroluminescent display substrate includes: a base substrate; a thin film transistor; a display light-emitting element on a side of the thin film transistor away from the base substrate; an inorganic material layer between the thin film transistor and the display light-emitting element; an encapsulating structure covering the display light-emitting element; a hole, at least penetrating the encapsulating structure; at least one post spacer surrounding the hole; and an overcoat layer covering the at least one post spacer. An orthographic projection of the inorganic material layer on the base substrate at least partially overlaps with an orthographic projection of the thin film transistor on the base substrate, an orthographic projection of the at least one post spacer on the base substrate falls within an orthographic projection of the overcoat layer on the base substrate, and the overcoat layer is located in the same layer as the inorganic material layer.

Abstract: A full-electric drive cementing control system is disclosed.

Abstract: These disclosures relate to a method for detecting and removing personnel interference while measuring volume of an object. An image of an object is obtained, a background information of the image is removed, and the image is converted into a binary image. An outline of the object is detected from the binary image. A determination is made whether the outline extends towards a boundary of the field of view. If the outline of the object does not extend to the boundary of the field of view, the volume of the object is measured. Otherwise, an extending part is removed from the outline using a morphological method, if removable. If the extending part is removed, the volume of the object is measured based on an outline of the object obtained after the extended part is removed, and a class 1 warning is issued. Otherwise, a class 2 warning is issued and the measurement is ended. This approach improves efficiency of the object volume measurement.

Abstract: The present application discloses an image processing method and apparatus, an optical system, and a computer-readable storage medium. The method comprises: acquiring parameters of rectangular images of inner ring portions and outer ring portions of an object to be inspected; preprocessing, according to the parameters of the rectangular images of the inner ring portions and the outer ring portions, the rectangular images of inner ring portions and the rectangular images of outer ring portions to form a rectangular image of the object; initializing parameters of a target circular image according to the rectangular image of the object; and determining pixel mapping relationships between the target circular image and the rectangular image of the object, and determining pixel values on the target circular image according to the pixel mapping relationships and pixel values on the rectangular image of the object.

Abstract: A method and device for issuing an identity certificate to a blockchain node in a blockchain network includes issuing a first identity certificate to a first terminal. a second identity certificate issuance request that is from the first terminal and that is made by using the first identity certificate is received and a second identity certificate is issued to the first terminal, which forwards the second identity certificate to a second terminal. A third identity certificate issuance request that is from the second terminal and that is made by using the second identity certificate is received and a third identity certificate is issued to the second terminal, which forwards the third identity certificate to a third terminal.