Abstract: Provided in the present disclosure are a virtual character-based interaction method, apparatus and device and a storage medium. The method comprises: first, controlling in a virtual scene a virtual character of a first user to perform a preset first action; and then, during the process of the virtual character of the first user performing the preset first action, if it is detected that a preset first behavior event occurs between the virtual character of the first user and a virtual character of a second user, controlling in the virtual scene the virtual character of the first user and the virtual character of the second user to perform a preset interaction action.

Abstract: Disclosed in this application are a method for embedding a watermark in video data and apparatus, a method for extracting a watermark in video data and apparatus, a device, and a storage medium. The method for embedding the watermark includes: acquiring a target image frame in video data; performing time-frequency transformation on the target image frame to obtain target frequency domain data, the target frequency domain data comprising a matrix formed by frequency domain coefficients; changing the frequency domain coefficients in the target frequency domain data according to watermark data to obtain watermarked frequency domain data; performing inverse time-frequency transformation on the watermarked frequency domain data to obtain a watermarked image frame; and synthesizing watermarked video data according to the watermarked image frame.

Abstract: A content extraction method and apparatus including presenting a document selection interface based on an uploading operation in an information exchange interface, the document selection interface comprising at least one document, based on a selection operation on a first document of the at least one document, presenting, in the information exchange interface, the first document and processing information of the first document in a status area corresponding to the first document, the processing information indicating a current processing stage in a process of performing content extraction on the first document and a corresponding processing status, and after the content extraction on the first document is completed, removing display of the status area, and presenting, in the information exchange interface, a document digest obtained by performing content extraction on the first document.

Abstract: A positioning method includes: obtaining an integrated signal strength and a first-path signal strength; obtaining an initial distance value between a sending device and a receiving device, and initial position information of the sending device; determining a correction distance value according to the integrated signal strength and the first-path signal strength, and correcting the initial distance value by using the correction distance value, to obtain a target distance value; and correcting the initial position information according to the target distance value, to obtain target position information.

Abstract: Provided are a networking and positioning method, system and device, and a storage medium. The method includes: acquiring, by means of Bluetooth communication, Bluetooth broadcast positioning data broadcast by a positioning master base station in a preset positioning region, a positioning beacon and the positioning master base station are each provided with a Bluetooth communication device; and networking and positioning the positioning beacon on the basis of the Bluetooth broadcast positioning data.

Abstract: Provided is a light-emitting diode and a method for preparing the same. The light-emitting diode includes an anode, a hole transport layer, a perovskite light-emitting layer, an electron transport layer and a cathode stacked in sequence, in which the perovskite light-emitting layer includes a first sublayer and a second sublayer stacked in sequence, with a material for forming the first sublayer including an inorganic perovskite material, and with a material for forming the second sublayer being an organic perovskite material.

Abstract: Disclosed in this application are a method for embedding a watermark in video data and apparatus, a method for extracting a watermark in video data and apparatus, a device, and a storage medium. The method for embedding the watermark includes: acquiring a target image frame in video data; performing time-frequency transformation on the target image frame to obtain target frequency domain data, the target frequency domain data comprising a matrix formed by frequency domain coefficients; changing the frequency domain coefficients in the target frequency domain data according to watermark data to obtain watermarked frequency domain data; performing inverse time-frequency transformation on the watermarked frequency domain data to obtain a watermarked image frame; and synthesizing watermarked video data according to the watermarked image frame.

Abstract: Provided are a networking and positioning method, system and device, and a storage medium. The method comprises: acquiring, by means of Bluetooth communication, Bluetooth broadcast positioning data broadcast by a positioning master base station in a preset positioning region, wherein a positioning beacon and the positioning master base station are each provided with a Bluetooth communication device; and networking and positioning the positioning beacon on the basis of the Bluetooth broadcast positioning data.

Abstract: Provided is a light-emitting diode and a method for preparing the same. The light-emitting diode includes an anode, a hole transport layer, a perovskite light-emitting layer, an electron transport layer and a cathode stacked in sequence, in which the perovskite light-emitting layer includes a first sublayer and a second sublayer stacked in sequence, with a material for forming the first sublayer including an inorganic perovskite material, and with a material for forming the second sublayer being an organic perovskite material.

Abstract: Provided is a light-emitting diode and a method for preparing the same. The light-emitting diode includes an anode, a hole transport layer, a perovskite light-emitting layer, an electron transport layer and a cathode stacked in sequence, in which the perovskite light-emitting layer includes a first sublayer and a second sublayer stacked in sequence, with a material for forming the first sublayer including an inorganic perovskite material, and with a material for forming the second sublayer being an organic perovskite material.

Abstract: Provided is a light-emitting diode and a method for preparing the same. The light-emitting diode includes an anode, a hole transport layer, a perovskite light-emitting layer, an electron transport layer and a cathode stacked in sequence, in which the perovskite light-emitting layer includes a first sublayer and a second sublayer stacked in sequence, with a material for forming the first sublayer including an inorganic perovskite material, and with a material for forming the second sublayer being an organic perovskite material.

Abstract: A device is configured to control display of a live broadcast of an interactive multi-user activity session in a network application. The device receives a user request for triggering an interactive live broadcast in the network application and obtains a live broadcast page for interaction in the network application from a server end. The computing device then causes display of the live broadcast page on a display located at a public broadcast location. The interaction in the network application is to be performed among users corresponding to user terminals that are located in proximity to the public broadcast location. The computing device obtains, in real time by using a persistent connection established to the server end, an update message corresponding to a dynamic change in user data in the interaction in the network application. The computing device updates display of the live broadcast page according to the update message.