Abstract: A collimator includes a front lens sleeve, a clamping groove disposed on the front lens sleeve, a linking sleeve fastened on the clamping groove, a snapping groove disposed on the linking sleeve distal the front lens sleeve, a connection sleeve slidably connected to the snapping groove, a constraint sleeve disposed on the snapping groove, and a limit groove disposed on an inner surface of the constraint sleeve. The components cooperate with each other. The test chart is tilted relative to the optical axis of the lens and makes the test chart distributed at different distances along the axis. When using the camera to shoot the collimator, the clarity of different components reflects the relative focus position of the camera so as to detect the vehicle mounted camera.

Abstract: Described herein are a method and apparatus for Wi-Fi network processing, an electronic device, and a storage medium. In response to detecting a Wi-Fi signal, signal energy of the Wi-Fi signal is obtained. In response to the signal energy being greater than a first energy threshold, a correlation degree between the Wi-Fi signal and a preset Wi-Fi signal is obtained. In response to the signal energy being greater than the first energy threshold and less than a second energy threshold and the correlation degree is greater than a first correlation degree threshold, the Wi-Fi signal is demodulated. In response to the signal energy being not less than the second energy threshold and the correlation degree is greater than a second correlation degree threshold, the Wi-Fi signal is demodulated.

Abstract: Embodiments of the present disclosure disclose a method for detecting ambient light sensing value, an electronic device and a storage medium. The method includes: collecting a light sensing value when a display screen is in an on state, to obtain a first light sensing value; collecting a light sensing value when the display screen is in an off state, to obtain a second light sensing value; calculating a difference between the first light sensing value and the second light sensing value, to obtain a light sensing value drop depth; acquiring a first calibration coefficient or a second calibration coefficient; calculating the ambient light sensing value based on the first light sensing value, the light sensing value drop depth and the first calibration coefficient; or calculating the ambient light sensing value based on the second light sensing value, the light sensing value drop depth and the second calibration coefficient.

Abstract: A hierarchical workflow is configured to associate examination information captured using an imaging platform with contextual metadata. The examination information may include ultrasound image data, which may be associated with annotations, measurements, pathology, body markers, and/or the like. The hierarchical workflow may comprise templates associated with respective anatomical regions, locations, volumes, and/or surfaces. A template may define configuration data to automatically adapt the imaging platform to capture imaging data in the corresponding anatomical region. The template may further include guidance information for the operator, including processing steps for capturing relevant examination information. Additional examination information may be captured and included in the hierarchical workflow.

Abstract: The present disclosure describes a method, a device, and storage medium for transferring a virtual item. The method includes receiving, by a first electronic device, a transfer request from a second electronic device, the transfer request comprising at least one physical item identifier and a quantity corresponding to each physical item identifier that are recognized by the second electronic device. The method also includes determining, by the first electronic device, at least one target virtual item according to the at least one physical item identifier and the quantity corresponding to each physical item identifier, the at least one target virtual item being associated with the at least one physical item identifier and the quantity corresponding to each physical item identifier; and transferring, by the first electronic device, the at least one target virtual item from a first position to a second position in a target virtual environment.

Abstract: A method, apparatus and device for synchronously playing audio are provided. The method includes: acquiring status information of a Bluetooth controller in the first audio playing device and Bluetooth time from the Bluetooth controller, and determining native Bluetooth time of the first audio playing device based on the status information and the Bluetooth time acquired from the Bluetooth controller; estimating, based on the native Bluetooth time of the first audio playing device and offset time of the native Bluetooth time of the first audio playing device relative to native Bluetooth time of a second audio playing device or native Bluetooth time of an audio providing device, absolute time of the second audio playing device or absolute time of the audio providing device; and playing an audio signal provided by the audio providing device synchronously with the second audio playing device based on the estimated absolute time.

Abstract: The present invention discloses a System on Chip, which includes a power supply pin, a ground pin, an anti-static unit and an anti-reverse connection unit, wherein the anti-static unit is connected between the power supply pin and the ground pin through the anti-reverse connection unit, the power supply pin and the ground pin of the System on Chip are connected to an external power supply; wherein, when the System on Chip is in normal operation, the anti-static unit performs ESD protection of the power supply pin through the conducted anti-static unit; whereas when the external power supply is reversely connected between the power supply pin and the ground pin of the System on Chip, the anti-reverse connection unit is cut off to prevent the reversely connected external power supply from directly connecting anode with cathode of the external power supply through the anti-static unit.

Abstract: A push-push frequency doubler based on complementary transistors is provided. The first differential amplifier circuit receives a differential input signal having an initial frequency, and amplifies the amplitude of the second harmonic of the differential input signal to obtain a first signal. The second differential amplifier circuit receives the differential input signal with the initial frequency and amplifies the amplitude of the second harmonic of the differential input signal to obtain the second signal. Where, the first signal and the second signal are a set of differential signals with the same amplitude and a phase difference of 180°. The output load circuit extracts the second harmonic signal in the first and second signal respectively to obtain and output a pair of differential output signal with first output frequency whose value is twice of the initial frequency. As a result, the frequency doubler with differential output signal is realized.