Abstract: A data transmission method and a communication apparatus are disclosed. The method includes: A first device receives a trigger frame, where the trigger frame indicates a resource unit (RU) allocated to the first device; and the first device sends first data to a second device, where the first data occupies a discrete subcarrier in the RU. In this way, the transmit power of a subcarrier can be increased, and the transmission performance can be ensured.

Abstract: The present disclosure relates to a color temperature adjustment effect detection method and apparatus, a computer device, a storage medium, and a computer program product. A second terminal sends a real standard color temperature to a first terminal, so that the first terminal acquires an actual used color temperature based on the real standard color temperature. Through the first terminal, the actual used color temperature is converted into a target matrix, and the target matrix is embedded into a video frame to obtain an embedded image. Through the first terminal, the embedded image is displayed based on the actual used color temperature, and the embedded image is sent to the second terminal, so that the second terminal parses the embedded image to obtain the actual used color temperature, and acquires an actual rendered color temperature based on a display result of the first terminal.

Abstract: A device for extracting polysaccharide from Acaudina molpadioides is provided, which includes a mixing box, a blocking cover, a feed pipe group, a discharge pipe, a bottom plate, a side plate, a first motor, a first transmission shaft, two drive shafts, a first circular gear, two second circular gears, two rotary discs, two connecting frame groups, two semiarc rotary discs, a slide bar, a stop collar, a fixed link, a baffle, a first bushing group and a first sleeve spring group. A top side wall and a rear lower side of the mixing box are communicated with the feed pipe group and the discharge pipe, respectively. Front side and rear sides of the slide bar are longitudinally connected with multiple first engaging teeth. Both the two semiarc rotary discs are connected with multiple second engaging teeth. The fixed link is connected between the stop collar and the slide bar.

Abstract: This application provides a data transmission method and a communication apparatus. The method includes: A first device receives a trigger frame, where the trigger frame indicates a resource unit RU allocated to the first device; and the first device sends first data to a second device, where the first data occupies a discrete subcarrier in the RU. Based on the method provided by this application, a transmit power of a subcarrier can be increased, and transmission performance can be ensured.

Abstract: A sequence generation method, includes: generating a PPDU which comprises a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8; and sending the PPDU, therefore the matrix-mapped EHT LTF sequence in a PPDU has a low PAPR value.

Abstract: A device for extracting polysaccharide from acaudina molpadioides is provided, which includes a mixing box, a blocking cover, a feed pipe group, a discharge pipe, a bottom plate, a side plate, a first motor, a first transmission shaft, two drive shafts, a first circular gear, two second circular gears, two rotary discs, two connecting frame groups, two semiarc rotary discs, a slide bar, a stop collar, a fixed link, a baffle, a first bushing group and a first sleeve spring group. A top side wall and a rear lower side of the mixing box are communicated with the feed pipe group and the discharge pipe, respectively. Front side and rear sides of the slide bar are longitudinally connected with multiple first engaging teeth. Both the two semiarc rotary discs are connected with multiple second engaging teeth. The fixed link is connected between the stop collar and the slide bar.

Abstract: The invention discloses a method for producing 30-halogenated betulinic acid. Betulin is used as a raw material and selectively oxidized and halogenated to generate 30-betulinic acid, and the selected oxidation and halogenation agent has high selectivity and does not affect C-3 hydroxyl or carbon-carbon double bonds. Oxidation and halogenation are completed in one step, so the process route is short, the treatment method is simple, and the product is purified easily.

Abstract: The invention discloses a method for producing 30-halogenated betulinic acid. Betulin is used as a raw material and selectively oxidized and halogenated to generate 30-betulinic acid, and the selected oxidation and halogenation agent has high selectivity and does not affect C-3 hydroxyl or carbon-carbon double bonds. Oxidation and halogenation are completed in one step, so the process route is short, the treatment method is simple, and the product is purified easily.