Abstract: The present disclosure relates to the technical field of piezoelectric ceramics polarization, and particularly relates to a high-temperature polarization method for strip-shaped or rod-shaped piezoelectric ceramics. The piezoelectric ceramics are heated to a temperature above a Curie temperature point in a closed polarization environment, and an electric domain turning resistance of the piezoelectric ceramics is reduced to a preset value. Voltages are applied to two ends of the piezoelectric ceramics, and an electric domain orientation of the piezoelectric ceramics are converted, through a temperature reduction and pressure increase method, to be consistent with a direction in which an electric field is applied. The piezoelectric ceramics are cooled to a room temperature, and polarization is completed. According to the method, voltages applied to two ends of a piezoelectric fiber can be reduced by reducing internal resistance of the piezoelectric fiber.

Abstract: A continuous delivery preparation capable of being stably released and a preparation method therefor, wherein the preparation includes an active pharmaceutical ingredient and a gel carrier, and the gel carrier includes a biodegradable polymer, an organic solvent, a hydrophobic additive, and an optional hydrophilic gel matrix material. Compared with an in-situ gel prepared using a conventional Atrigel technology, the delivery preparation has the effect of slowing down in vitro and vivo burst release of the drug after a small amount of the hydrophobic additive and the optional hydrophilic gel matrix material are added, and the in-vivo blood drug concentration can be maintained for more than one week in a safe and effective range. The preparation method of the preparation is simple.

Abstract: A method for regulating an ILK signaling pathway in a cell, includes administering to the cell exosomes derived from mesenchymal stem cells, in particular mesenchymal stem cells derived from induced pluripotent stem cells. A method is provided for treating ILK signaling pathway related diseases using the exosomes. A pharmaceutical composition is provided for treating ILK signaling pathway related diseases, and includes exosomes derived from mesenchymal stem cells.

Abstract: A dynamic backlight control method, a dynamic backlight module, and a storage medium are provided in the present application. A lamp bead of the dynamic backlight module includes a green chip and at least two blue chips. The dynamic backlight control method includes: receiving a source signal; and when the source signal is a pure blue signal, turning off the green chip, and driving more than two of the blue chips to output blue light.

Abstract: An antibacterial nylon 6 material of formula (I), preparation method therefor and application thereof are provided. In formula (I), each R1 group and each R2 group are independently selected from the group consisting of C1-24 linear or branched aliphatic hydrocarbyl groups, substituted or unsubstituted C3-12 alicyclic hydrocarbyl groups, substituted or unsubstituted C6-18 aryl groups and substituted or unsubstituted C7-30 aralkyl groups, or the R1 and R2 groups on the same nitrogen atom, together with the attached N atom, form a 5-7 membered saturated or unsaturated heterocyclic ring; each R3 group is independently selected from the group consisting of hydrogen (H), C1-24 linear or branched aliphatic hydrocarbyl groups, substituted or unsubstituted C3-12 alicyclic hydrocarbyl groups, substituted or unsubstituted C6-18 aryl groups, and substituted or unsubstituted C7-30 aralkyl groups; x is in a range of 0.02-0.30; y is in a range of 0.70-0.98, and x+y=1.

Abstract: A short-circuit protection circuit, chip and system for a switched-mode power supply are disclosed. The short-circuit protection circuit includes: a sampling module for sampling an input voltage and producing a first voltage from the input voltage; a generation module for generating a second voltage from a reference voltage; a comparison module for comparing the first voltage and the second voltage; and an output module for producing, from a result of the comparison performed by the comparison module, and outputting a control signal for controlling an external power transistor in the event of a short circuit in the switched-mode power supply. According to the present invention, when an output short circuit is detected, a hiccup-mode duty cycle is adjusted according to the input voltage, thus avoiding great energy loss when the input voltage is high and enabling loaded startup or automatic output recovery after the short circuit condition is removed when the input voltage is low.

Abstract: A gesture recognition method, apparatus and system based on coupling capacitance, which are configured to solve the technical problem in the prior art of it not being possible to recognize a complex gesture due to the fact that the coordinates of a manipulation body on a three-dimensional plane cannot be determined.

Abstract: Embodiments of the present disclosure disclose a method and apparatus for generating an image file and a computer-readable storage medium. The method includes: receiving an image file generation request, the image file generation request carrying an application installation file; loading a basic image file of an operating system in a preset system area according to the image file generation request, to start the operating system; installing an application corresponding to the application installation file in the operating system, and running the application to obtain a system dataset after the application is run and attribute information of the application; identifying application data corresponding to the application from the system dataset according to the attribute information of the application; and merging the application data with the basic image file to generate an image file of the application.

Abstract: An oil-gas well, a well cementation method, and a cement composition are provided. The oil-gas well has a well body, a sleeve disposed in the well body, and a cement slurry cured product disposed between the well body and the sleeve. Due to the strength and toughness of the cement slurry cured product, at least part of the sleeve is a non-metal sleeve. By selecting specific cement, the cured product of cement has excellent mechanical strength and toughness, and is mated with the non-metal sleeve to achieve well cementation.

Abstract: The present application discloses a grouting consolidation sample containing internal defects and the preparation method thereof. Firstly, plasticine is employed to prepare a wax model with the desired defect shape, then a fixing device is used to fix the wax model onto a specific position in a casting mould of consolidation and thereafter a slurry is poured to form a grouting consolidation sample, after the grouting consolidation sample reaches the predetermined strength, the grouting consolidation sample containing the wax model is put into an oven to heat at a temperature above the melting point of wax to demolish the structure of the wax model to form a grouting consolidation sample with internal defects.

Abstract: The present invention discloses a method for preparing an ibuprofen spherical crystal having high bulk density and a product thereof. The method includes: (1) heating ibuprofen until a molten liquid state is reached; and (2) pressurizing the molten liquid state of ibuprofen, dropping the molten liquid state of ibuprofen into a crystallizer filled with water through a liquid distributor for crystallization under stirring conditions until the molten liquid state of ibuprofen is completely dropped, lowering the rotation speed of stirring to allow crystal growing, and finally, subjecting a resulting crystal slurry to post-treatment to obtain the ibuprofen spherical crystal having high bulk density. The ibuprofen spherical crystal has a bulk density of 0.50-0.70 g/mL, a tap density of 0.63-0.89 g/mL, a median particle size of 300-1,000 ?m and an angle of repose of 22-29°.

Abstract: A dynamic backlight control method, a dynamic backlight module, and a storage medium are provided in the present application. A lamp bead of the dynamic backlight module includes a green chip and at least two blue chips. The dynamic backlight control method includes: receiving a source signal; and when the source signal is a pure blue signal, turning off the green chip, and driving more than two of the blue chips to output blue light.

Abstract: This application provides a coating system, and relates to the technical field of coating. The coating system may include a coating head, a feeding apparatus, and a valve. The coating head may be equipped with at least two dispensing cavities independent of each other. Each dispensing cavity may include a coating opening. The feeding apparatus may be connected to the dispensing cavity, and the feeding apparatus may be configured to feed a slurry to the dispensing cavity. The valve may be disposed between at least one dispensing cavity and the feeding apparatus, and configured to implement communication or disconnection between a corresponding dispensing cavity and the feeding apparatus.

Abstract: Embodiments of this application provide an electrode assembly, a manufacturing method and manufacturing system of same, a battery cell, and a battery. The electrode assembly includes a negative electrode plate and a positive electrode plate, where the negative electrode plate and the positive electrode plate are wound in a winding direction to form a winding structure, and the winding structure includes a bending zone. The negative electrode plate and the positive electrode plate each include a plurality of bending portions located in the bending zone.

Abstract: An annealing and drawing device for an oxygen-free copper tube used for a mobile phone heat pipe with a large diameter-wall thickness ratio, a drawing die is installed in a box body. An annealing tube is installed between the drawing die and the box body; a fixing plate is disposed on a side of the drawing die; a supporting roller is rotatably connected to the fixing plate. A tension adjusting mechanism is disposed on a side of the supporting roller. An outer side of an end of the box body is provided with a mounting plate. A supporting frame is fixed on a side of an upper end of the mounting plate, a servo motor is fixed at an upper end of the supporting frame, and a rotating shaft is fixed at an end of an output shaft of the servo motor. The rotating shaft is in key joint with a winding wheel.

Abstract: A method may include receiving, from a software application, pre-signup data of a user, embedding the pre-signup data to obtain a pre-signup data vector, generating, by applying a topic model to the pre-signup data vector, a pre-signup topic vector, receiving action descriptions of actions of the software application, embedding the action descriptions to obtain action description vectors, generating, by applying the topic model to the action description vectors, action description topic vectors, generating scores by multiplying the pre-signup topic vector and the action description topic vectors, and recommending, to the user and using the scores, an action.

Abstract: A method of automatic image freezing of digestive endoscopy based on a perceptual hash algorithm includes: analyzing a video streaming of digestive endoscopy acquired by digestive endoscopy imaging system into image data; calculating a similarity between an image at t point in time and images of first n frames, to obtain a weighted similarity k of the image; and comparing the weighted similarity k of the image at t point in time with a freezing boundary l, and triggering an instruction of image freezing when the k reaches l to obtain the clear images with the best visual field from the video streaming of digestive endoscopy.

Abstract: A method may include receiving, from a software application, pre-signup data of a user, embedding the pre-signup data to obtain a pre-signup data vector, generating, by applying a topic model to the pre-signup data vector, a pre-signup topic vector, receiving action descriptions of actions of the software application, embedding the action descriptions to obtain action description vectors, generating, by applying the topic model to the action description vectors, action description topic vectors, generating scores by multiplying the pre-signup topic vector and the action description topic vectors, and recommending, to the user and using the scores, an action.