The present invention discloses a method for preparing sucralose-6-acylate in a biphasic liquid-liquid system. The method comprises slowly dropwise adding an inert non-polar solvent containing a chlorinating agent to an N,N-dimethyl formamide (DMF) solution of sucrose-6-acylate; then reacting the biphasic liquid-liquid mixture at a certain temperature for 9-20 hours; cooling the system to room temperature after stopping heating, and settling the solution to form layers, an upper layer being an inert non-polar solvent layer, and a lower layer being a DMF solution layer containing the product; hydrolyzing, neutralizing, and filtering the lower layer to obtain a filtrate, and then concentrating the filtrate to obtain a concentrate; dissolving the concentrate in water, and obtaining the product by extraction using ethyl acetate and crystallization, the inert non-polar solvent being an alkane solvent containing 8-18 carbon atoms that is not mutually soluble with DMF. The method has a high product yield, and can significantly reduce the decomposition of DMF, thereby reducing costs.
Embodiments of the present invention relates to the field of file synchronization. Disclosed are a method for use in file synchronization, a recipient device, and a system. The method comprises: receiving a file synchronization request from a sender device; transmitting a response message on the basis of the request, where the response message comprises multiple storage area addresses of a recipient device; receiving multiple file blocks transmitted by the sender device on the basis of the response message, where the multiple file blocks are produced by splitting a file to be transmitted, and each file block of the multiple file blocks comprises a unique identifier and the storage area address of the recipient device corresponding to the unique identifier; and, allocating the file blocks to corresponding storage areas on the basis of the unique identifiers of the file blocks and the storage area address of the recipient device corresponding to the unique identifiers, and assembling in real-time the multiple file blocks stored in the storage areas so as to produce the file to be transmitted. As such, even when the file to be transmitted is large, stable transmission of the file can still be ensured, thus increasing the success rate of synchronization.
Disclosed are a display substrate (200), and a display panel and a preparation method therefor. The display substrate (200) comprises: a base substrate (210); and a common electrode (220), wherein the common electrode (220) is located on the base substrate (210), the common electrode (220) has a hollowed-out portion (10) arranged corresponding to a signal line, and the signal line comprises at least one of a gate line (121) and a data line (122). Thus, the load of the substrate can be reduced by reducing the directly facing area of the common electrode (220) and the signal line, thereby reducing the power consumption of a liquid crystal panel.
Provided are a mask plate and a manufacturing method thereof, and a display device. The mask plate comprises an optically transmissive substrate and a mask pattern formed at the optically transmissive substrate. The optically transmissive substrate has an optical transmittance gradually decreasing from an edge portion to a central portion thereof.
Disclosed are a method and device for strengthening the laser shock of a hidden surface. The method comprises: using a method similar to machining in segments to establish a continuous laser shock strengthening track and process after acquiring the information about the whole hidden surface; and a control system adjusting the movement and rotation of a total reflection mirror (11) which is arranged in a workpiece (4) according to the signal from signal collecting cards (9, 10) for making a reflected laser beam act on a region to be machined of the hidden surface at an appropriate incidence angle, i.e., an included angle between the reflected laser beam and the normal line of the region to be machined of the hidden surface, so as to realize the laser shock strengthening treatment of the hidden surface. By using the movement and rotation of the total reflection mirror arranged in the workpiece, the method can realize the surface strengthening treatment of the hidden surface of the workpiece, significantly improve the mechanical performance of the workpiece and increase the fatigue life thereof, which is applicable to the surface strengthening of the workpiece with the hidden surface.
Provided is a gate driving circuit. The gate driving circuit comprises cascaded shift registers (GOA1, GOA2, GOA3, GOA4) in multiple stages. Each shift register in each stage comprises an input module, a first reset module, a second reset module, an energy storage module, an output module, and a pull-down node potential generation module (100), and at least two shift registers share one pull-down node potential generation module. Also provided are a display panel comprising the gate driving circuit and a method used for driving the gate driving circuit.
A method and a device for customizing a multi-channel installation package. Said method comprises: generating, in a format of Android compilation, a basic installation package using the source code of an application program, and copying the basic installation package into a temporary installation package (101); reading the unread channel information of the application program and generating, according to the channel information, a temporary channel file and naming the temporary channel file with the channel number that the channel information corresponds to (102); writing the temporary channel file into the temporary installation package, and naming the temporary installation package with the combination of the channel number and the name of the application program so as to obtain the channel package that the channel information corresponds to, and pushing the channel package to a promotion channel so as to be downloaded by a terminal (103). Said method reduces a lot of human work involved in the multi-channel installation package compilation and the processes of repeated compilations of the installation package, improving the packing efficiency of the multi-channel installation package.
Based on previous work, which presented theorems and algorithms for generating a new type of generalized Ball curve (Partial Said-Ball curve), the present study supplements the transformation formula from a Bezier curve to a Partial Said-Ball curve and prove the corresponding theorem. All the results are useful for the application of generalized Ball curves and their popularization in Computer Aided Geometric Design.
An array substrate (1) and a manufacturing method therefor, and a display device, used for improving a light leakage phenomenon of the display device. The array substrate (1) comprises a plurality of pixel regions (11) arranged on a base substrate (10) in an array, with a signal line (12) being provided between two adjacent pixel regions of the pixel regions (11), and a gap (13) being between the pixel regions (11) and the signal line (12), wherein the array substrate (1) further comprises at least one anti-light leakage electrode (14), the anti-light leakage electrode (14) being insulated from the pixel regions (11) and the signal line (12), and the vertical projection of the anti-light leakage electrode (14) on the base substrate (10) at least covering a part of the vertical projection of the gap (13) on the base substrate (10).
The present invention relates to a cloud upload method and system, a scheduling device and a client. The method comprises: receiving, by a scheduling centre, a file upload request sent by at least one client, the request comprising a file fingerprint of a file to be uploaded; according to a file fingerprint inquiry data centre, judging a state of the file to be uploaded; if the state is that upload is not completed, acquiring the current upload progress and fragmentation information of the file to be uploaded from the data centre, allocating an upload node for each client, and sending the current upload progress, the fragmentation information and the allocated upload node to a corresponding client; executing, by each client, the displaying of the current upload progress; according to the fragmentation information, uploading, by the upload node, a file slice; executing, by each node, the updating of the current upload progress of the data centre according to the file slice uploaded by the client; reading the update progress gathered by the data centre and sending same to the client for display; and if the state is that upload is already completed, returning information that upload is successful to the client. The file upload time is shortened, and the cloud upload efficiency is improved.