Abstract: The present application provides a positive electrode active material, a method for the preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same. The positive electrode active material having a core-shell structure, comprising a core and a shell covering the core, wherein the core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, the shell comprises a first cladding layer covering the core, and a second cladding layer covering the first cladding layer, wherein the first cladding layer comprises pyrophosphate MP2O7 and phosphate XPO4, and the second cladding layer comprises carbon. The positive electrode active material of the present application enables the secondary battery and electrical device to have a relatively high energy density, and good cycling performance, rate performance and safety performance.

Abstract: Implementations of this application provide a method and an apparatus for controlling a voltage of a power supply of a data processing device and a data processing device. The method includes: determining a computing power ratio of the data processing device based on an actual computing power and a theoretical computing power of the data processing device; generating a power supply control instruction based on a result of comparison between the computing power ratio and a predetermined threshold; and controlling an output voltage of the power supply of the data processing device based on the power supply control instruction. According to the implementations of this application, the output voltage of the power supply is controlled according to the computing power ratio, and a good compromise can be obtained between the power consumption loss and the computing power of the data processing device.

Abstract: A membrane structure includes a plurality of first refraction films and a plurality of second refraction films. The second refraction films and the first refraction films are alternately stacked. A transparent substrate including the membrane structure is disclosed. The membrane structure can effectively reduce the reflectance of light.

Abstract: A membrane structure includes a plurality of first refraction films and a plurality of second refraction films. The second refraction films and the first refraction films are alternately stacked. A transparent substrate including the membrane structure is disclosed. The membrane structure can effectively reduce the reflectance of light.

Abstract: A mobile terminal having a display, processor, and storage medium storing a program including instructions to display a first interface of the first application in full size with a status bar, obtain a first screenshot of the first application that includes only a portion of the first interface, display a second interface of the second application in full size with the status bar, obtain a second screenshot of the second application that includes only a portion of the second interface, detect a browsing operation for background applications, display the first screenshot in response to the browsing operation, delete the first screenshot in response to a second operation, detect a switching operation by the user, and switch to running the second application in the foreground in response to the switching operation.

Abstract: A mobile terminal having a display, processor, and storage medium storing a program including instructions to display a first interface of the first application in full size with a status bar, obtain a first screenshot of the first application that includes only a portion of the first interface, display a second interface of the second application in full size with the status bar, obtain a second screenshot of the second application that includes only a portion of the second interface, detect a browsing operation for background applications, display the first screenshot in response to the browsing operation, delete the first screenshot in response to a second operation, detect a switching operation by the user, and switch to running the second application in the foreground in response to the switching operation.

Abstract: The present invention relates to the field of mobile terminals and discloses a method and an apparatus for taking a screenshot of a screen of an application. An instruction is received for closing a screen of a designated application. A designated area of the screen of the designated application is captured to obtain a screenshot of the designated area. The screenshot of the designated area is saved and the screen of the designated application is closed.

Abstract: The present invention relates to the field of mobile terminals and discloses a method and an apparatus for taking a screenshot of a screen of an application. An instruction is received for closing a screen of a designated application. A designated area of the screen of the designated application is captured to obtain a screenshot of the designated area. The screenshot of the designated area is saved and the screen of the designated application is closed.