Abstract: Disclosed are a trifluoromethyl alkenylphosphonate derivative and preparation method therefor. The preparation method comprises the following steps: dissolving an acetylene derivative, an iodine compound, and a phosphorus reagent in a solvent for reaction at the temperature from the room temperature to 100° C. to obtain the trifluoromethyl alkenylphosphonate derivative. In the present invention, the acetylene derivative is used as a starting material, and the raw materials are easily available and diversified; products obtained by using the method of the present invention have various types and can be directly used and also used for other further reactions; moreover, the method disclosed in the present invention has the advantages of short steps, mild reaction conditions, simple reaction operation and post-treatment processes, and high yield, and is suitable for large-scale production.

Abstract: Devices and methods for quickly and accurately measuring the distance between two carriers of item processing equipment. The devices and methods can include an elongate bar and associated components which may increase the magnitude of lengths that can be measured.

Abstract: The present invention relates to a pyrimidine derivative, a method for preparing same and use thereof in medicine. In particular, the present invention relates to a pyrimidine derivative represented by general formula (I), a method for preparing same and a pharmaceutically acceptable salt thereof as well as use thereof as a therapeutic agent, in particular as a FGFR4 kinase inhibitor, definitions of each substituent in the general formula (I) being the same as those defined in the description.

Abstract: A radio-frequency power output device includes a cooling plate, a temperature detection module, and a control module. The cooling plate is provided with a first circuit board and a second circuit board respectively on two opposite sides thereof, and the first circuit board and the second circuit board are provided with a first radio-frequency power amplification circuit and a second radio-frequency power amplification circuit, respectively. The temperature detection module is used to obtain the temperature of the first circuit board and the temperature of the second circuit board. The control module controls, based on the temperature of the first circuit board, the first radio-frequency power amplification circuit to output a radio-frequency power signal at a target temperature, and controls, based on the temperature of the second circuit board, the second radio-frequency power amplification circuit to output a radio-frequency power signal at the target temperature.

Abstract: Provided is a display panel, including: a main body having a display region; and a rear folding portion provided with a plurality of binding pins. In an embodiment, the rear folding portion is bendable, and at least a part of the rear folding portion is capable of being folded back to a side of a backlight surface of the main body. In an embodiment, an edge of the rear folding portion that is connected to the main body is a first edge, and the first edge extends along a first direction. In an embodiment, the main body includes two second edges arranged opposite to each other along the first direction. In an embodiment, a vertical distance between an endpoint of the first edge and a line of one second edge most adjacent thereto is d1, and a minimum distance between two second edges is d2, 0.025?d1/d2?0.25.

Abstract: A display panel includes: a first display region used for disposing a sensor; a second display region surrounding the first display region; first pixel units in the first display region; second pixel units in the second display region; and an array substrate, where the array substrate includes a plurality of first data lines and a plurality of second data lines, and the plurality of first data lines pass through the first display region; where in the first display region, each of the plurality of first data lines is electrically connected to a sub-pixel of the first pixel units.

Abstract: There is provided cross-modal feature extraction, retrieval, and model training methods and apparatuses, and a medium, which relates to the field of artificial intelligence (AI) technologies, and specifically to fields of deep learning, image processing, and computer vision technologies. A specific implementation solution involves: acquiring to-be-processed data, the to-be-processed data corresponding to at least two types of first modalities; determining first data of a second modality in the to-be-processed data, the second modality being any of the types of the first modalities; performing semantic entity extraction on the first data to obtain semantic entities; and acquiring semantic coding features of the first data based on the first data and the semantic entities and by using a pre-trained cross-modal feature extraction model.

Abstract: The present invention relates to the field of forming technologies for rubber sealing ring blanks, and more particularly to an automatic forming method and device for a rubber sealing ring blank. A cutting blade is fixedly connected to the surface of a blank forming assembly; an equipment body II is fixedly connected to a sliding table die set; a supporting rod II is fixedly connected to the surface of the equipment body II; a blank box is fixedly connected to the inner side surface of the supporting rod II; and a blank spool is fixedly connected to the tail end of a long blank strip. The method and device disclosed by the present invention have the advantages that the automation degree is high, and the long blank strip conveyed from the blank spool passes through guide wheels and a guide groove and is automatically pressed into a ring through the combined action of the blank forming assembly and the cutting blade.

Abstract: The present disclosure discloses a preparation method of an organosilica/ceramic composite membrane with a gradient pore structure. The preparation method comprises: (1) selecting a porous ceramic material as a membrane support layer; (2) gradually replacing a solvent with water to prepare zirconium colloidal sols with different particle sizes, and successively coating the prepared zirconium colloidal sols onto a ceramic support from large to small so as to form a membrane transition layer with a gradient pore structure; and (3) catalytically synthesizing an organosilica polymeric sol using hydrochloric acid, coating the prepared organosilica sol onto the preheated transition layer through ultrasonic thermal spraying to undergo heat treatment, so as to prepare the organosilica/ceramic composite membrane with the gradient pore structure. According to the present disclosure, the transition layer with the gradient pore structure is prepared by using the zirconium colloidal sols with different particle sizes.

Abstract: A variable flow heat exchanger may include a housing and a heat exchange core. The housing may include a first housing and a second housing. The heat exchange core may be arranged between the first housing and the second housing. The heat exchange core may be formed by superposition of multi-layer heat exchange plates. A cooling fluid interface may be arranged on the first housing. A cooled fluid interface may be arranged on the second housing. The cooled fluid interface may include a first interface, a second interface, and a third interface. In a first state, a cooled fluid may flow into the heat exchange core from the first interface and may flow out of the second interface. In a second state, the cooled fluid may flow into the heat exchange core from the first interface and the second interface, respectively, and may flow out of the third interface.

Abstract: A shock absorption pedal with adjustable resistance includes: a fixed guide rail, fixedly connected to a vehicle body; a sliding frame, arranged in a groove of the fixed guide rail, and movable vertically along the fixed guide rail; and a support plate, fixedly connected to the sliding frame. A displacement regulating mechanism is arranged on the fixed guide rail. One end of the displacement regulating mechanism is arranged outside the groove of the fixed guide rail, and another end of the displacement regulating mechanism is connected to one end of a shock absorption spring. Another end of the shock absorption spring is fixedly connected to the sliding frame. A position of the sliding frame is regulable by the displacement regulating mechanism, to adjust a length of the shock absorption spring.

Abstract: A hollow brushless motor and a fan include a center shaft, a rotating housing, a stator, a driver, and a permanent magnet. The center shaft is of a hollow structure. A wire passing channel allowing power lines to penetrate through is defined in the center shaft. A through hole communicated with the wire passing channel is defined on one side of the center shaft. An accommodating cavity is formed in the rotating housing. The stator is fixed on the center shaft and is disposed in the accommodating cavity. The driver is electrically connected to the stator. The driver is disposed beside the through hole. The permanent magnet is fixed to an inner side wall of the accommodating cavity and is disposed on an outer periphery of the stator. The fan includes the motor and fan blades.

Abstract: Various embodiments for a transport dispatch system for route selection are described herein. An embodiment operates by determining the total quantity of goods to be shipped to the plurality of railway stations, wherein the total quantity of goods exceeds a capacity of a single train that is to deliver the total quantity of goods to the plurality of railway stations across a plurality of requests. The distances between each of the plurality of railway stations and a dispatch station are determined. It is determined that some stations are in one direction from a dispatch station, and another set of stations are in a different direction. A metric for selecting one of a plurality of variations of the shipping route is identified. The metric is computed for each of the plurality of variations of the shipping route, and a first variation with a lowest metric is selected.

Abstract: Various embodiments for a transport dispatch system for route selection are described herein. An embodiment operates by determining the total quantity of goods to be shipped to the plurality of railway stations. A plurality of variations of the shipping route are identified. A user-provided metric is computing for each of the plurality of variations of the shipping route. A first variation is identified from the plurality of variations of the shipping route for which the computed user-provided metric is lower than a remainder of the plurality of variations of the shipping route, The first variation of the shipping route is provided indicating an order in which each of the plurality of stations receives its portion of the total quantity of goods based on its request.

Abstract: Various embodiments for a transport dispatch system for trailer assignment are described herein. An embodiment operates by determining the total quantity of goods to be shipped to the plurality of railway stations, the total quantity of goods comprising a plurality of different materials. A plurality of different types of shipping containers for transporting the different materials are determined. A command to identify the trailer assignment for shipping the total quantity of goods to the plurality of railway stations is received. The trailer assignment for shipping the total quantity of goods to the plurality of railway stations using a fewest number of the shipping containers is computed. The trailer assignment indicating the fewest number of shipping containers that can be used to ship the plurality of different materials to the plurality of railway stations is provided.

Abstract: Devices and methods for quickly and accurately measuring the distance between two carriers of item processing equipment. The devices and methods can include an elongate bar and associated components which may increase the magnitude of lengths that can be measured.

Abstract: The present invention relates to a pyrimidine derivative, a method for preparing same and use thereof in medicine. In particular, the present invention relates to a pyrimidine derivative represented by general formula (I), a method for preparing same and a pharmaceutically acceptable salt thereof as well as use thereof as a therapeutic agent, in particular as a FGFR4 kinase inhibitor, definitions of each substituent in the general formula (I) being the same as those defined in the description.

Abstract: The satellite image processing method includes: acquiring a first target satellite image; defogging the first target satellite image through a first neural network to acquire a first satellite image; and adjusting an image quality parameter of the first satellite image through a second neural network to acquire a second satellite image.

Abstract: A MEMS gas sensor (A) and array (B) thereof, a gas detection and preparation method. The gas sensor (A) comprises a first substrate (A2) with a cavity (A1) provided in a first surface, and a gas detection assembly (A3) arranged at an opening of the cavity The gas detection assembly comprises: a supporting suspension bridge (A31) erected on the opening of the cavity, and a gas detection part (A32) arranged on the supporting suspension bridge. The gas detection part comprises a strip-shaped heating electrode part (A321), an insulating layer (A322), a strip-shaped detection electrode part (A323) and a gas-sensitive material part (A324), which are sequentially stacked. The strip-shaped detection electrode part comprises a first detection electrode part (A323-1) and a second detection electrode part (A323-2), with a first opening (A325) provided between the A323-1 and A323-2; the gas-sensitive material part is arranged at the position of the first opening.

Abstract: An impedance tuner in a magnetic resonance system include at least one of an amplitude tuning circuit and a phase tuning circuit. The amplitude tuning circuit includes M serially-connected amplitude tuners. Each amplitude tuner includes at least one microwave transmission line and a first switch circuit connected in parallel, wherein the first switch circuit controls the at least one microwave transmission line to be in an on state or an off state, respectively, and the value of M is a positive integer greater than or equal to 1. The phase tuning circuit includes a phase tuner, and the phase tuner includes P second microwave transmission lines and a second switch circuit, wherein the second switch circuit controls the P second microwave transmission lines to be in an on state or an off state, respectively, and the value of P is a positive integer greater than or equal to 2.