Abstract: A hydrogel preparation 10 is disclosed as including carboxymethyl cellulose (CMC) 12, fumaric acid 14, a plurality of cavities 16 formed by the CMC and the fumaric acid, and zinc oxide 26 and/or xylitol 24 within the cavities.

Abstract: This application discloses example data management methods. One example method includes obtaining, by a first terminal device, metadata of a target file in response to an access operation performed by a user on the target file through a first application, where the target file is stored in a local storage device, the first application is different from a second application, the second application is a dedicated application that is of the local storage device and that is installed on the first terminal device, and the first terminal device stores the metadata of the target file. The first terminal device sends an access request to the local storage device, where the access request includes the metadata of the target file. The first terminal device receives the target file sent by the local storage device.

Abstract: This application provides a thumbnail management method and a related apparatus. One or more applications are installed in an electronic device. The method includes: in response to an operation performed by a user on a first application, the first application invokes a thumbnail service that obtains an address identifier of a first thumbnail corresponding to a first original image in response to invoking of the first application, where the address identifier is in a storage space; the thumbnail service returns the address identifier of the first thumbnail to the first application; and the first application displays the first thumbnail. Thumbnails of original images on the electronic device are managed and stored in a unified manner through the thumbnail service, and an application does not need to cache the thumbnails. This can save storage space on the electronic device, and resolve a problem of a waste of storage space.

Abstract: An audio control method, a system, and device, the method including displaying, by a first device, in response to a first user operation, a candidate device list, obtaining, in response the user selecting a second device from the candidate device list, an audio capability parameter of the second device indicating a hardware capability and a software capability for playing audio, determining a first audio play policy based on the audio capability parameter of the second device, obtaining second audio data by the first device by performing first processing on first audio data from a first audio application according to the first audio play policy, and sending, by the first device, the second audio data to the second device, so that second device plays the second audio data or processes the second audio data and plays processed second audio data.

Abstract: A material for triboelectric nanogenerator comprising a biomass-based material co-doped with a hygroscopic agent and a metal salt, wherein: the biomass-based material includes any one of a saccharide-based material; the hygroscopic agent includes any one of a polyol-based compound, a sulfone-based compound, a tetrahydropyran-based, or a isocyanate-based compound; and the metal salt includes any one of a monovalent metal salt, a divalent metal salt or a trivalent metal salt. Use of the material in a triboelectric nanogenerator is also addressed.

Abstract: This application discloses example data management methods. One example method includes obtaining, by a first terminal device, metadata of a target file in response to an access operation performed by a user on the target file through a first application, where the target file is stored in a local storage device, the first application is different from a second application, the second application is a dedicated application that is of the local storage device and that is installed on the first terminal device, and the first terminal device stores the metadata of the target file. The first terminal device sends an access request to the local storage device, where the access request includes the metadata of the target file. The first terminal device receives the target file sent by the local storage device.

Abstract: A hydrogel preparation 10 is disclosed as including carboxymethyl cellulose (CMC) 12, fumaric acid 14, a plurality of cavities 16 formed by the CMC and the fumaric acid, and zinc oxide 26 and/or xylitol 24 within the cavities.

Abstract: An audio control method, a system, and device, the method including displaying, by a first device, in response to a first user operation, a candidate device list, obtaining, in response the user selecting a second device from the candidate device list, an audio capability parameter of the second device indicating a hardware capability and a software capability for playing audio, determining a first audio play policy based on the audio capability parameter of the second device, obtaining second audio data by the first device by performing first processing on first audio data from a first audio application according to the first audio play policy, and sending, by the first device, the second audio data to the second device, so that second device plays the second audio data or processes the second audio data and plays processed second audio data.