ByteDance

An optical system and a display apparatus are provided. The optical system includes an optical waveguide (100) and a Fresnel lens (200). The optical waveguide (100) includes a waveguide substrate (110), a coupling-in structure (120) and a coupling-out structure (130), the coupling-in structure (120) and the coupling-out structure (130) are provided on the waveguide substrate (110), the optical waveguide (100) is configured such that at least part of light coupled into the optical waveguide (100) via the coupling-in structure (120) exits via the coupling-out structure (130) after undergoing total internal reflection propagation in the optical waveguide (100). The Fresnel lens (200) is located on a light-exiting side of the optical waveguide (100). The coupling-out structure (130) includes a grating (131,132), the Fresnel lens (200) includes Fresnel teeth (201), and the Fresnel teeth (201) are configured to adjust an exit angle of at least part of light passing through the Fresnel lens (200). In a direction perpendicular to the waveguide substrate (110), the coupling-out structure (130) and the Fresnel teeth (201) overlap. Therefore, the Fresnel lens (200) can be used for refractive correction, so that the optical system and the display apparatus are thinner, and at the same time, users with refractive errors can see the display screen clearly.

The present disclosure relates to a scheduling method and apparatus, and a computer-readable storage medium, and relates to the field of computer technologies. The scheduling method includes: determining, according to a target device of a first operation request, a device priority corresponding to the first operation request; and determining, according to the device priority and a currently idle hardware resource, whether to issue the first operation request to the target device for processing.

Embodiments of the present disclosure proposes a headset-based text recognition method, apparatus, headset, storage medium and program product, and relates to the field of headset technology. The method is applied to a processing unit, and includes: when it is detected that a text recognition mode is triggered, sending a shooting instruction to a camera unit, so that the camera unit can acquire at least one image to be recognized of the recognized object according to the shooting instruction; receiving the at least one image to be recognized sent by the camera unit; inputting the at least one image to be recognized into a preset text recognition model, so that the preset text recognition model can recognize the image to be recognized, so as to obtain text content; and outputting the text content.

The present disclosure relates to an interaction method and apparatus, an electronic device, and a storage medium. The method includes: displaying a video playback window within an extended reality space, the video playback window being configured to display image content of a local area in a VR video image; and in response to an adjustment operation for a VR video picture, keeping the video playback window fixed in position within the extended reality space, and adjusting the local area of the VR video image displayed in the video playback window, a picture displayed in the video playback window after the adjustment being not exactly the same in content as a picture displayed in the video playback window before the adjustment. A method is provided which allows a user to adjust a viewing angle of a VR video according to his/her own needs to satisfy personalized viewing needs of the user.

The present application discloses a media data recommendation method and apparatus, a device, a storage medium, and a program product, which relate to the technical field of data recommendation. The method includes: acquiring a first interactive instruction for a first multimedia application, where the first interactive instruction is used to trigger display of a first page; and displaying the first page, where first recommendation information and a source of the first recommendation information are displayed in the first page, the first recommendation information is information associated with an associated object of the first multimedia application in a second multimedia application, and the associated object is used to represent an object having an association relationship with a current object of the first multimedia application. The present disclosure may solve the problem of media data recommendation.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for using differential privacy device bounded contributions. One of the methods includes maintaining (202), for each time period from a set of time periods, action data for a device; determining whether a current time period satisfies a time period criterion; selecting, using a result of the determination whether the time period criteria is satisfied and from a set of two or more bound generation processes, a bound generation process for the device; computing (212), using the bound generation process, a bound on an amount of data from the action data and for the device to transmit to a downstream system; selecting (214), using the action data for the device, a responsive data set with a size defined by the bound; and transmitting (220), to the downstream system, the responsive data set with the size defined by the bound.

Embodiments of the present disclosure provide a content generation method and apparatus, an electronic device and a storage medium. A target viewing angle is determined in response to a user operation, where the target viewing angle is configured to represent an observation viewing angle in a target state; an image medium is acquired, and a content generation model is invoked to process the image medium based on the target viewing angle to generate viewing angle effect content, where the viewing angle effect content has an effect video frame, and the effect video frame is configured to display a visual effect of observing the image medium based on the target viewing angle. A target viewing angle representing an observation viewing angle of a target observation object is determined, and an image generation model is invoked by using the target viewing angle as input to process an image medium to generate viewing angle effect content, thereby realizing video generation based on the viewing angle dimension, and improving the quality of the generated video.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for finding splits in gradient boosting systems. One example method includes identifying, based on multi-party computation (MPC), a first split among possible first splits in a first layer of a decision tree. Identifying the first split comprises determining a first derivative and a second derivative for each sample in a dataset of n samples and m features; generating a sorting array indicating a sorting order of at least one feature; identifying the first split based on first derivatives, second derivatives and the sorting array; and generating an index vector that indicates whether each sample belongs to a first or a second sub-dataset. The method further includes identifying a second split among possible second splits in a second layer of the decision tree based on the first derivatives, the second derivatives, the sorting array, and the index vector.

The disclosure provides a headphone. The headphone includes: a sound generating part, configured to be worn on a front side of an ear, and including a speaker unit; a main body part, configured to be worn on a rear side of the ear; an ear clip part, opposite ends of which being respectively connected to the sound generating part and the main body part, and the ear clip part being configured to switch between a first form and a second form; a form detecting apparatus, provided on at least one of the sound generating part and the main body part, and configured to detect a wearing form of the ear clip part; and a control apparatus, configured to control an audio output state of the speaker unit according to a detection result of the form detecting apparatus.

The disclosure relates to the technical field of electronic products, in particular to an ear-clip earphone. The ear-clip earphone includes a speaker unit, a main body part and an ear clip part, where the speaker unit is adapted to be arranged on a front side of an ear, and the main body part is adapted to be arranged on a back side of the ear; both ends of the ear clip part are respectively connected to the speaker unit and the main body part, and the ear clip part is configured to switch between a first form and a second form, where in the first form, the speaker unit and the main body part jointly clamp the ear, and in the second form, the speaker unit abuts against the tragus. According to the ear-clip earphone provided by the disclosure, the user can switch the ear clip part between the first form and the second form according to different requirements, thus enriching the forms and functions of the ear-clip earphone and being beneficial to expanding the use scenarios of the ear-clip earphone.