Abstract: The present disclosure relates to a copper-phosphorus-zinc-tin brazing sheet and a preparation method and use thereof. The copper-phosphorus-zinc-tin brazing sheet includes a copper core layer, CuP alloy layers respectively arranged on two sides of the copper core layer, and at least two SnZn alloy layers respectively arranged on the other sides of the two CuP alloy layers away from the copper core layer.

Abstract: The present invention relates to a ligand, a method for preparing same, and a use thereof. The ligand has a structure represented by formula (I) or formula (II), wherein R1, R2, R3, and R4 are all linear structures with a glycosyl group at a terminal end; X and Y are both Y-shaped backbone structures connected with other chemical groups; and X1, X2, and Y are all Y-shaped backbone structures connected with other chemical groups.

Abstract: Validation of alt text for images in web pages includes extracting image data from the web pages, the image data including source data and alt text data for a plurality of image elements in the web pages. Natural language descriptions of the image elements are generated by providing images defined by the source data to a computer vision component. Prompts are then generated for a semantic comparison model. The prompts include the natural language descriptions of image elements and the alt text for the image elements. The semantic comparison model is trained to output similarity scores for the prompts. Each of the similarity scores is indicative of a similarity between the natural language description and the alt text data for the image element associated with each prompt. Image elements having inaccurate alt text can then be determined based the similarity score.

Abstract: Provided in the present invention are a K-Truss graph-based storage system cache prefetching method, a system, and a medium, where method steps of the present invention include: when a data request stream in a system arrives, an access mode of the data request stream is determined; if said mode is a sequence mode, then n sequence blocks after a data block corresponding to the data request stream are prefetched and serve as prefetch data; otherwise, the data block corresponding to the data request stream serves as a query vertex to query a K-Truss graph, a truss structure matching the query vertex is obtained, and data of a data block from within the truss structure is obtained and serves as prefetch data; the K-Truss graph is updated according to the data block corresponding to the data request stream; and lastly a prefetch data block is prefetched into a main memory.

Abstract: The present disclosure relates to a copper-phosphorus-zinc-tin brazing sheet and a preparation method and use thereof. The copper-phosphorus-zinc-tin brazing sheet includes a copper core layer, CuP alloy layers respectively arranged on two sides of the copper core layer, and at least two SnZn alloy layers respectively arranged on the other sides of the two CuP alloy layers away from the copper core layer.

Abstract: Provided in the present invention are a K-Truss graph-based storage system cache prefetching method, a system, and a medium, where method steps of the present invention include: when a data request stream in a system arrives, an access mode of the data request stream is determined; if said mode is a sequence mode, then n sequence blocks after a data block corresponding to the data request stream are prefetched and serve as prefetch data; otherwise, the data block corresponding to the data request stream serves as a query vertex to query a K-Truss graph, a truss structure matching the query vertex is obtained, and data of a data block from within the truss structure is obtained and serves as prefetch data; the K-Truss graph is updated according to the data block corresponding to the data request stream; and lastly a prefetch data block is prefetched into a main memory.

Abstract: A method for providing an anti-rollback secure timer service includes determining, at a device which includes a processor providing a trusted execution environment (TEE), a trusted memory, and a real time clock (RTC) accessible through an operating system of the device, an initial reference time value, by a secure timer application running in the TEE, the initial reference time value determined based on an initial value of the RTC obtained during booting of the device and a time delta value. The method further includes determining an updated reference time value based on the initial reference time value, a second value of the RTC, and a previously stored old reference time value, determining an updated time delta value based on the second value of the RTC and the updated reference time value, and storing the updated time delta value and the updated reference time value in the trusted memory.

Abstract: A brazing material outer coat and a method for preparing the same, an in-situ synthetic metal-coated flux-cored silver brazing material and a method for preparing the same, a welding method and a joint body, wherein the in-situ synthetic metal-coated flux-cored silver brazing material comprises a flux core and a brazing material outer coat wrapping the flux core, the brazing material outer coat comprises, in percentage by weight: silver Ag 20.0˜36.0%, copper Cu 35.0˜45.0%, zinc Zn 27.0˜37.0%, tin Sn 1.0˜3.0%, phosphorus P 0.1%˜0.5%, nickel Ni 0.5˜2.0%, germanium Ge 0.1˜0.3%, and lithium Li 0.1˜0.3%, the flux core comprises, in percentage by weight: elemental boron micropowder 5.0˜10.0%, sodium borohydride 5.0˜10.0%, potassium fluoroborate 15.0˜30.0%, boric anhydride 25.0˜40.0%, sodium fluoride 10.0˜30.0%, sodium bifluoride 2.0˜4.0%, and copper sulfate 1.0˜5.0%.

Abstract: A brazing material outer coat and a method for preparing the same, an in-situ synthetic metal-coated flux-cored silver brazing material and a method for preparing the same, a welding method and a joint body, wherein the in-situ synthetic metal-coated flux-cored silver brazing material comprises a flux core and a brazing material outer coat wrapping the flux core, the brazing material outer coat comprises, in percentage by weight: silver Ag 20.0˜36.0%, copper Cu 35.0˜45.0%, zinc Zn 27.0˜37.0%, tin Sn 1.0˜3.0%, phosphorus P 0.1%˜0.5%, nickel Ni 0.5˜2.0%, germanium Ge 0.1˜0.3%, and lithium Li 0.1˜0.3%, the flux core comprises, in percentage by weight: elemental boron micropowder 5.0˜10.0%, sodium borohydride 5.0˜10.0%, potassium fluoroborate 15.0˜30.0%, boric anhydride 25.0˜40.0%, sodium fluoride 10.0˜30.0%, sodium bifluoride 2.0˜4.0%, and copper sulfate 1.0˜5.0%.

Abstract: A method for providing an anti-rollback secure timer service includes determining, at a device which includes a processor providing a trusted execution environment (TEE), a trusted memory, and a real time clock (RTC) accessible through an operating system of the device, an initial reference time value, by a secure timer application running in the TEE, the initial reference time value determined based on an initial value of the RTC obtained during booting of the device and a time delta value. The method further includes determining an updated reference time value based on the initial reference time value, a second value of the RTC, and a previously stored old reference time value, determining an updated time delta value based on the second value of the RTC and the updated reference time value, and storing the updated time delta value and the updated reference time value in the trusted memory.

Abstract: The present disclosure relates to the technical field of wireless network communications, and provides a method, system and client for uploading an image, a network server and a computer storage medium. The method includes: a client determines an image to be uploaded, generates a unique image identifier corresponding to the image to be uploaded, and transmits an image detection request to a network server; the network server detects whether there is an image having the same image identifier in the network server according to the image identifier included in the image detection request, and returns a detection result to the client; when the detection result is that there is not an image having the same image identifier in the network server, the client uploads the image to be uploaded in the form of multi-part uploading to the network server; and after the image to be uploaded is uploaded successfully, the network server records the image identifier, and returns an upload success response to the client.

Abstract: The invention discloses an apparatus for relieving surface-layer clogging of a denitrification deep-bed filter and a method for running the same, which belongs to the field of sewage treatment.

Abstract: The invention discloses an apparatus for reliving surface-layer clogging of a denitrification deep-bed filter and a method for running the same, which belongs to the field of sewage treatment.

Abstract: According to an example, a first terminal device uploads sharing information to a server, the server sends identification information related to the sharing information to the first terminal device according to the sharing information, and the first terminal device transforms the identification information into a sound signal, and plays the sound signal. a second terminal device receives the sound signal, parses the sound signal to obtain the identification information, and sends a download request comprising the identifier information to the server. The server sends the sharing information to the second terminal device according to the download request.

Abstract: A thermally treated expanded perlite that can be coated or impregnated with at least one active material and the use of the thermally treated expanded perlite as a light-weight filtration media. Methods for forming thermally treated expanded perlite as well as methods for forming thermally treated perlite coated or impregnated with an active material are also disclosed.

Abstract: A thermally treated expanded perlite that can be coated or impregnated with at least one active material and the use of the thermally treated expanded perlite as a light-weight filtration media. Methods for forming thermally treated expanded perlite as well as methods for forming thermally treated perlite coated or impregnated with an active material are also disclosed.

Abstract: According to an example, a first terminal device uploads sharing information to a server, the server sends identification information related to the sharing information to the first terminal device according to the sharing information, and the first terminal device transforms the identification information into a sound signal, and plays the sound signal. a second terminal device receives the sound signal, parses the sound signal to obtain the identification information, and sends a download request comprising the identifier information to the server. The server sends the sharing information to the second terminal device according to the download request.

Abstract: An interactive method, apparatus based on an image and a server are provided according to embodiments of the present invention. The method includes: recognizing a face region in an image; generating a face box corresponding to the face region; generating a label box corresponding to the face box; and representing label information corresponding to the face region in the label box by performing one of the following modes: obtaining the label information corresponding to the face region from a server, representing the label information obtained from the server in the label box; and receiving the label information corresponding to the face region inputted by a user, representing the label information inputted by the user in the label box. Thus, based on the label information provided by the server or the user, information associated with a circled region is customized (e.g., reviews information), and is further pushed to an associated friend.

Abstract: The present invention provides an etchant which is a reaction product of sulfuric acid and ammonium persulfate, wherein the concentration of the ammonium persulfate is 1˜25%, the concentration of the sulfuric acid is 98%. The etchant is produced by adding the ammonium persulfate into the sulfuric acid at a temperature of 100 to 200 degree Celsius. According to the present invention, the ammonium persulfate substitute the conventional oxidizing agent of hydrogen peroxide. Since the ammonium persulfate is in a powder form, the operation becomes more convenient. Furthermore, since sulfuric acid is formed as a by-product instead of water, the etchant will not be diluted after being used for many times, which reduces the production cost.

Abstract: The present disclosure relates to the technical field of wireless network communications, and provides a method, system and client for uploading an image, a network server and a computer storage medium. The method includes: a client determines an image to be uploaded, generates a unique image identifier corresponding to the image to be uploaded, and transmits an image detection request to a network server; the network server detects whether there is an image having the same image identifier in the network server according to the image identifier included in the image detection request, and returns a detection result to the client; when the detection result is that there is not an image having the same image identifier in the network server, the client uploads the image to be uploaded in the form of multi-part uploading to the network server; and after the image to be uploaded is uploaded successfully, the network server records the image identifier, and returns an upload success response to the client.