Abstract: An outdoor electric cabinet and an air duct structure thereof are provided. The air duct structure is used to guide airflow to an air inlet side of a fan. The air duct structure includes an air inlet port, a flow-guiding cavity and an air distribution assembly. The air inlet port is configured to introduce external airflow into the air duct structure. The flow-guiding cavity is formed between the air inlet port and the air inlet side of the fan. The air distribution assembly is arranged in the flow-guiding cavity to uniformly distribute an air suction force of the air inlet port. The airflow suction force at the air inlet port is distributed more uniformly by the air distribution assembly, which effectively weakens the maximum wind speed on the shortest path.

Abstract: Methods and devices to implement mid-wave and long-wave infrared point spectrometers are disclosed. The described methods and devices involve bi-faceted gratings, high-operating-temperature barrier infrared and thermal detectors. The disclosed concept can be used to design flight spectrometers that cover broad solar reflectance plus thermal emission spectral ranges with a compact and low-cost instrument suitable for small spacecraft reconnaissance of asteroids, the Moon, and planetary satellites as well as mass-constrained landed missions.

Abstract: The present disclosure discloses a human detection method and device, an electronic apparatus, and a storage medium. The method includes: a millimeter-wave radar signal of a target environment (101) is obtained; information of a moving point in the target environment (102) is extracted from the millimeter-wave radar signal; a micro-Doppler feature of each target in the target environment (103) is determined according to the information of the moving points in the target environment, wherein the target is formed by at least one moving point; and a target whose category is human in the target environment (104) is identified according to the micro-Doppler feature of each target in the target environment. The millimeter-wave radar technology is combined with artificial intelligence technology, so as to enable human detection in the target environment without invading human privacy, thus providing the possibility of achieving automatic control, monitoring and other operations of the target environment.

Abstract: Methods and devices to implement mid-wave and long-wave infrared point spectrometers are disclosed. The described methods and devices involve bi-faceted gratings, high-operating-temperature barrier infrared and thermal detectors. The disclosed concept can be used to design flight spectrometers that cover broad solar reflectance plus thermal emission spectral ranges with a compact and low-cost instrument suitable for small spacecraft reconnaissance of asteroids, the Moon, and planetary satellites as well as mass-constrained landed missions.

Abstract: A concomitant impedance protection method for a half-wavelength power transmission line includes that: three-phase currents and three-phase voltages of a relay protection device mounting position at an M side and a relay protection device mounting position at an N side of the half-wavelength power transmission line are acquired respectively; it is judged whether starting amounts of an M side and an N side meet starting conditions or not; a failure point F is determined according to a time difference when the starting amounts of the M side and the N side meet the starting conditions; and a relay protection action of the half-wavelength power transmission line is started according to concomitant impedance of the half-wavelength power transmission line.

Abstract: An audio processing method, apparatus and system, capable of realizing the experience of singing Karaoke with other people. The method comprises: acquiring an audio file of a song and a lyric file of the song; playing the audio file at display time corresponding to a first lyric part of the lyric file and recording audio data of a user; playing the audio file at display time corresponding to a second lyric part of the lyric file; and performing audio mixing on the audio data of the user and audio data of the audio file at the display time corresponding to the first lyric part.

Abstract: Embodiments of the present disclosure provide a video generation method, device and terminal. Embodiments of the present disclosure may perform effect processing for the image frames obtained from a video during shooting of the video or after the shooting of the video is finished using the selected video effect template, and compose the processed image frames to obtain the composite video. The problem of only presenting contents shot using a camera during the recording of a song and being not able to provide customized functions satisfying users' requirements may be solved. The effect of performing effect processing for all image frames or partial image frames in the shot video using the video effect template selected by the user to obtain the composite video satisfying the users' requirements may be achieved.

Abstract: A concomitant impedance protection method for a half-wavelength power transmission line includes that: three-phase currents and three-phase voltages of a relay protection device mounting position at an M side and a relay protection device mounting position at an N side of the half-wavelength power transmission line are acquired respectively; it is judged whether starting amounts of an M side and an N side meet starting conditions or not; a failure point F is determined according to a time difference when the starting amounts of the M side and the N side meet the starting conditions; and a relay protection action of the half-wavelength power transmission line is started according to concomitant impedance of the half-wavelength power transmission line.

Abstract: A karaoke processing method and a karaoke processing system are provided. The method includes: receiving a first antiphonal singing request inputted by a first user; acquiring an accompaniment audio file and a lyrics file of a song from a server based on the first antiphonal singing request, and recording singing performed by the first user based on a part of lyrics by using the accompaniment audio file and the lyrics file, to obtain a first recorded file; determining a first lyrics part based on the first recorded file and generating paragraph information; performing audio mixing processing on the first recorded file and the accompaniment audio file, to obtain a first target file; and sending the first target file and the paragraph information to the server.

Abstract: A karaoke processing method, a karaoke processing apparatus and a karaoke processing system are provided. The method includes: acquiring an accompaniment audio file, an original vocal audio file and a lyrics file of a song, where the lyrics file includes time information for identifying display time of lyrics; dividing the lyrics file to obtain a first and a second lyrics parts and generating lyrics division information; generating a target audio file by outputting the accompaniment audio file in the display time of the first lyrics part and outputting the original vocal audio file in the display time of the second lyrics part; and sending the target audio file and a target lyrics file to a client upon reception of a karaoke request sent by the client, where the target lyrics file is obtained by adding the lyrics division information in the lyrics file.

Abstract: A karaoke processing method and a karaoke processing system are provided. The method includes: receiving a first antiphonal singing request inputted by a first user; acquiring an accompaniment audio file and a lyrics file of a song from a server based on the first antiphonal singing request, and recording singing performed by the first user based on a part of lyrics by using the accompaniment audio file and the lyrics file, to obtain a first recorded file; determining a first lyrics part based on the first recorded file and generating paragraph information; performing audio mixing processing on the first recorded file and the accompaniment audio file, to obtain a first target file; and sending the first target file and the paragraph information to the server.

Abstract: A karaoke processing method, a karaoke processing apparatus and a karaoke processing system are provided. The method includes: acquiring an accompaniment audio file, an original vocal audio file and a lyrics file of a song, where the lyrics file includes time information for identifying display time of lyrics; dividing the lyrics file to obtain a first and a second lyrics parts and generating lyrics division information; generating a target audio file by outputting the accompaniment audio file in the display time of the first lyrics part and outputting the original vocal audio file in the display time of the second lyrics part; and sending the target audio file and a target lyrics file to a client upon reception of a karaoke request sent by the client, where the target lyrics file is obtained by adding the lyrics division information in the lyrics file.

Abstract: An audio processing method, apparatus and system, capable of realizing the experience of singing Karaoke with other people. The method comprises: acquiring an audio file of a song and a lyric file of the song; playing the audio file at display time corresponding to a first lyric part of the lyric file and recording audio data of a user; playing the audio file at display time corresponding to a second lyric part of the lyric file; and performing audio mixing on the audio data of the user and audio data of the audio file at the display time corresponding to the first lyric part.

Abstract: Embodiments of the present disclosure provide a video generation method, device and terminal. Embodiments of the present disclosure may perform effect processing for the image frames obtained from a video during shooting of the video or after the shooting of the video is finished using the selected video effect template, and compose the processed image frames to obtain the composite video. The problem of only presenting contents shot using a camera during the recording of a song and being not able to provide customized functions satisfying users' requirements may be solved. The effect of performing effect processing for all image frames or partial image frames in the shot video using the video effect template selected by the user to obtain the composite video satisfying the users' requirements may be achieved.