Abstract: Disclosed are a method and an apparatus for detecting a wearing state of an earphone, an earphone, and a storage medium. The method includes: obtaining a request for detecting the wearing state of the earphone; performing audio collection by a feedback microphone of the earphone to obtain a feedback audio signal; determining a frequency of the audio, and determining a target frequency with a power meeting a preset condition in the feedback audio signal based on the frequency and an audio collection parameter of the feedback microphone; performing a power spectrum analysis on the feedback audio signal to obtain a power spectrum of the feedback audio signal; determining target power information of the target frequency from the power spectrum; and in response to the target power information being not less than a maximum power threshold value set for the target frequency, determining that the wearing state is in-ear state.

Abstract: The present disclosure provides a liquid crystal display device and a control module thereof, and an integrated board, and relates to the field of display technologies. The integrated board includes a field programmable gate array and a backlight driver unit on a same circuit board. The field programmable gate array is configured to: receive screen data, generate screen synchronization data based on the screen data, and send the screen synchronization data to a liquid crystal display panel, and generate backlight drive data based on the screen data and send the backlight drive data to the backlight driver unit. The backlight driver unit is configured to receive the backlight drive data, where a delay between receiving the backlight drive data and receiving the screen synchronization data is less than one frame of time.

Abstract: A test system and test method continuously and intelligently measures water content of subgrade in real time. The test system is based on the theory of resistivity, and is equipped with a wheeled machine to measure the water content of subgrade. The wheeled machine includes scroll roller. The test system includes: at least one set of electrode including four probes wherein detection parts of the four probes are linearly and equidistantly arranged on the scroll roller. The arrangement direction of the detection parts of the four probes is parallel to the axis of the scroll roller; a data integration apparatus is connected to the four probes and used for performing data calculation, analysis, and transmission; the electric source is connected to data integration apparatus and used for supplying a working current. The system and method can realize automatic signal collection, non-destructive detection of subgrade soil and dynamic water content measurement.

Abstract: Provided are a backlight control method and system, a display device and a readable storage medium. The backlight control method includes: obtaining a backlight control signal, where the backlight control signal includes a mode signal and a data signal (21); obtaining the mode signal in the backlight control signal, where the mode signal includes a phase adjustment signal or a local dimming signal (22); in response to that the mode signal is the phase adjustment signal, writing the data signal corresponding to the mode signal into a light source drive module, such that the light source drive module adjusts a phase of a backlight source based on the data signal (23). By adding the phase adjustment signal to the backlight control signal, a backlight refresh phase may be directly adjusted by a front end device, without adding hardware, bringing conveniences and speediness.

Abstract: A test system and test method continuously and intelligently measures water content of subgrade in real time. The test system is based on the theory of resistivity, and is equipped with a wheeled machine to measure the water content of subgrade. The wheeled machine includes scroll roller. The test system includes: at least one set of electrode including four probes wherein detection parts of the four probes are linearly and equidistantly arranged on the scroll roller. The arrangement direction of the detection parts of the four probes is parallel to the axis of the scroll roller; a data integration apparatus is connected to the four probes and used for performing data calculation, analysis, and transmission; the electric source is connected to data integration apparatus and used for supplying a working current. The system and method can realize automatic signal collection, non-destructive detection of subgrade soil and dynamic water content measurement.

Abstract: The present disclosure provides in a first aspect a mode-locked laser for generating laser pulses. The mode-locked laser comprises an optical coupler and a first optical path capable of carrying optical signals from and to the optical coupler. The first optical path includes an optical amplifier that is arranged so that saturation of optical amplification causes amplitude modulation of the light. The optical amplifier has a saturation time that is shorter than a pulse transition period of the mode-locked laser and is arranged for recovery of amplifying properties after the saturation within a period of time that is shorter than the pulse transition period of the mode-locked laser. The laser further comprises a second optical path capable of carrying optical signals from and to the optical coupler. The second optical path includes an optical isolator.

Abstract: The present disclosure provides in a first aspect a mode-locked laser for generating laser pulses. The mode-locked laser comprises an optical coupler and a first optical path capable of carrying optical signals from and to the optical coupler. The first optical path includes an optical amplifier that is arranged so that saturation of optical amplification causes amplitude modulation of the light. The optical amplifier has a saturation time that is shorter than a pulse transition period of the mode-locked laser and is arranged for recovery of amplifying properties after the saturation within a period of time that is shorter than the pulse transition period of the mode-locked laser. The laser further comprises a second optical path capable of carrying optical signals from and to the optical coupler. The second optical path includes an optical isolator.