Abstract: An online concierge system generates an aggregated lift score for a test feature for the online concierge system. The online concierge presents prioritized items from a set of item groups to two sets of users: a test set and a control set. The online concierge system uses the test feature to present prioritized items to users in the test set, and the online concierge system uses existing functionality to present prioritized items to users in the control set. For each test group, the online concierge system creates holdout subsets out of the test set and the control set. The online concierge system tracks user interactions with items in an item group and computes a group lift score for the item group. The online concierge system generates an aggregated lift score for the test feature based on the group lift scores and presents items to users based on the aggregated lift score.

Abstract: Disclosed are a main beam and a use thereof and a photovoltaic tracking bracket, wherein the main beam includes a flat plate and an elliptical curved plate, each of both ends of the flat plate are respectively fixedly connected to a corresponding end of the elliptical curved plate to form a ring shape, and a plane where the flat plate is located is perpendicular to a long axis of an ellipse where the elliptical curved plate is located. Also provided is the use of the main beam in the photovoltaic tracking bracket. The photovoltaic tracking bracket includes the main beam; a stand column; and a bearing seat comprising a bearing ring, a Z-shaped support plate and a bottom plate connected sequentially from top to bottom, wherein the Z-shaped support plate has a Z-shaped cross section, the main beam is installed inside the bearing ring, the flat plate of the main beam faces a photovoltaic assembly, and the bottom plate is connected to the stand column.

Abstract: The present invention provides a full-azimuth irradiation tracking method, a detection apparatus, and a solar tracker. The method comprises: acquiring a multi-azimuth irradiation data combination in a full-azimuth irradiation tracking mode; calculating a target tracking angle with a maximum irradiation amount among a plurality of azimuths according to the multi-azimuth irradiation data combination, and rotating the solar tracker according to the target tracking angle; collecting irradiation data at a position reached after the solar tracker is rotated, and calculating and analyzing whether the solar tracker is rotated and reaches a target position corresponding to the target tracking angle; and when the solar tracker is rotated and reaches the target position corresponding to the target tracking angle, controlling the solar tracker to maintain for a preset time at the target position.

Abstract: The present invention provides a full-azimuth irradiation tracking method, a detection apparatus, and a solar tracker. The method comprises: acquiring a multi-azimuth irradiation data combination in a full-azimuth irradiation tracking mode; calculating a target tracking angle with a maximum irradiation amount among a plurality of azimuths according to the multi-azimuth irradiation data combination, and rotating the solar tracker according to the target tracking angle; collecting irradiation data at a position reached after the solar tracker is rotated, and calculating and analyzing whether the solar tracker is rotated and reaches a target position corresponding to the target tracking angle; and when the solar tracker is rotated and reaches the target position corresponding to the target tracking angle, controlling the solar tracker to maintain for a preset time at the target position.

Abstract: This application relates to a method and an apparatus for processing encoded data, a computer device, and a storage medium. The method includes: obtaining a to-be-encoded data frame; determining a complexity of the to-be-encoded data frame, the complexity representing at least a spatial texture complexity and a temporal motion intensity; obtaining a real-time encoding bit rate, the real-time encoding bit rate being an encoding bit rate of a previous encoded data frame of the to-be-encoded data frame; and adjusting an encoding parameter according to the real-time encoding bit rate and the complexity of the to-be-encoded data frame. The encoding parameter is adjusted according to the real-time encoding bit rate and the complexity, and different real-time encoding bit rates and complexities may correspond to different encoding parameters. In this way, the encoding parameter is applicable to different scenes, thereby achieving high adaptability.

Abstract: This application discloses a video encoding method, a video playback method, a related device, and a medium.

Abstract: An encoding method and apparatus for screen sharing, a storage medium, and an electronic device. The encoding method includes: capturing an original screen video to be encoded, the original screen video including a plurality of frames of screen images; reading image feature parameters of the plurality of frames of screen images in the original screen video; determining video encoding parameters for the original screen video according to the image feature parameters; acquiring screen display resolution of a screen sharing object; and encoding the original screen video according to the video encoding parameters and with reference to the screen display resolution of the screen sharing object. The technical solution according to the embodiments of the disclosure can increase efficiency of encoding for screen sharing.

Abstract: Disclosed are a main beam and a use thereof and a photovoltaic tracking bracket, wherein the main beam includes a flat plate and an elliptical curved plate, each of both ends of the flat plate are respectively fixedly connected to a corresponding end of the elliptical curved plate to form a ring shape, and a plane where the flat plate is located is perpendicular to a long axis of an ellipse where the elliptical curved plate is located. Also provided is the use of the main beam in the photovoltaic tracking bracket. The photovoltaic tracking bracket includes the main beam; a stand column; and a bearing seat comprising a bearing ring, a Z-shaped support plate and a bottom plate connected sequentially from top to bottom, wherein the Z-shaped support plate has a Z-shaped cross section, the main beam is installed inside the bearing ring, the flat plate of the main beam faces a photovoltaic assembly, and the bottom plate is connected to the stand column.

Abstract: A beam includes a flat plate and an elliptical curved plate, each of both ends of the flat plate are respectively fixedly connected to a corresponding end of the elliptical curved plate to form a ring shape, and a plane where the flat plate is located is perpendicular to a long axis of an ellipse where the elliptical curved plate is located. Also provided is the use of the beam in a solar tracking bracket that includes the beam; a post; and a bearing seat comprising a bearing ring, a Z-shaped support plate and a bottom plate connected sequentially. The Z-shaped support plate has a Z-shaped cross section, the beam is installed inside the bearing ring, the flat plate of the beam faces a solar module, and the bottom plate is connected to the post.

Abstract: Multi-point parallel synchronous drive device, which includes a drive mechanism and several stages of driven mechanisms drivingly connected. The drive mechanism comprises a first power output for rotatably connecting with a power output shaft, and a second power output disposed below the first power output and parallel to the first power output along a power output direction. The several stages of the driven mechanism are arranged at intervals in the power output direction. The second power output of the drive mechanism is drivingly connected with a power input of the adjacent driven mechanism along the power output direction, and the adjacent two-stage driven mechanisms are drivingly connected along the power output direction. The driven mechanism at any stage comprises a power output for rotatably connecting with the power output shaft. The device can be applied to the a solar tracking system, with the main shaft as the power output shaft.

Abstract: This application relates to a method and an apparatus for processing encoded data, a computer device, and a storage medium. The method includes: obtaining a to-be-encoded data frame; determining a complexity of the to-be-encoded data frame, the complexity representing at least a spatial texture complexity and a temporal motion intensity; obtaining a real-time encoding bit rate, the real-time encoding bit rate being an encoding bit rate of a previous encoded data frame of the to-be-encoded data frame; and adjusting an encoding parameter according to the real-time encoding bit rate and the complexity of the to-be-encoded data frame. The encoding parameter is adjusted according to the real-time encoding bit rate and the complexity, and different real-time encoding bit rates and complexities may correspond to different encoding parameters. In this way, the encoding parameter is applicable to different scenes, thereby achieving high adaptability.

Abstract: A picture file processing method, apparatus, and computer readable medium are provided. The method includes parsing a picture file, to obtain a picture header information data segment, first stream data, and second stream data of a first image thereof. The first stream data of the first image is decoded to generate red-green-blue (RGB) data of the first image. The second stream data of the first image is decoded to generate Alpha data of the first image. Red-green-blue-alpha (RGBA) data corresponding to the first image are generated according to the RGB data and the Alpha data.

Abstract: Embodiments of this application disclose an image transcoding method performed at a computing device. The image transcoding method includes: obtaining a source image quality parameter of a source image, the source image being a to-be-transcoded image, and the source image quality parameter being associated with a source image format and used for indicating image quality of the source image; obtaining, according to the source image quality parameter and a preset mapping relationship, a target image quality parameter that is associated with a target image format and that corresponds to the source image quality parameter of the source image; and transcoding the source image in the source image format according to the target image quality parameter to obtain a target image in the target image format.

Abstract: Embodiments of this application disclose an image file processing method performed at a computing device. The method includes: obtaining RGBA data corresponding to a first image in an image file, and separating the RGBA data to obtain RGB data and transparency data of the first image; encoding the RGB data of the first image according to a first video encoding mode, to generate first stream data; encoding the transparency data of the first image according to a second video encoding mode, to generate second stream data; and combining the first stream data and the second stream data into a stream data segment of the image file.

Abstract: Embodiments of this application disclose an image transcoding method performed at a computing device. The image transcoding method includes: obtaining a source image quality parameter of a source image, the source image being a to-be-transcoded image, and the source image quality parameter being associated with a source image format and used for indicating image quality of the source image; obtaining, according to the source image quality parameter and a preset mapping relationship, a target image quality parameter that is associated with a target image format and that corresponds to the source image quality parameter of the source image; and transcoding the source image in the source image format according to the target image quality parameter to obtain a target image in the target image format.

Abstract: A picture file processing method, apparatus, and computer readable medium are provided. The method includes parsing a picture file, to obtain a picture header information data segment, first stream data, and second stream data of a first image thereof. The first stream data of the first image is decoded to generate red-green-blue (RGB) data of the first image. The second stream data of the first image is decoded to generate Alpha data of the first image. Red-green-blue-alpha (RGBA) data corresponding to the first image are generated according to the RGB data and the Alpha data.

Abstract: The present invention relates to an LED automobile headlight with switchable dual-color temperature including a headlight body, a high-beam and low-beam switch and an LED driving device. The LED driving device includes: a control circuit module, configured to receive the high-beam signal or the low-beam signal, and output a control signal to control a driving circuit module; and the driving circuit module, configured to drive a white-light high-beam LED lamp, a yellow-light high-beam LED lamp, a white-light low-beam LED lamp or a yellow-light low-beam LED lamp to operate, based on the control signal.