Abstract: Disclosed is a loudspeaker, comprising a vibration diaphragm configured to vibrate to generate air-conducted sound waves and a casing configured to form an accommodation cavity. The vibration diaphragm divides the accommodation cavity into a front cavity and a rear cavity, the casing being provided with a sound outlet hole in flow communication with the front cavity, and at least a portion of the air-conducted sound waves being transmitted to the outside of the loudspeaker via the sound outlet hole. The casing is provided with a sound absorption pipe, and the sound absorption pipe is in flow communication with at least one of the front cavity and the rear cavity and configured to absorb sound waves of a target frequency in the air-conducted sound waves, and a length of the sound absorption pipe being in a range of 3/20-2/5 of a wavelength of the sound waves of the target frequency.

Abstract: An array substrate is provided. The array substrate includes a node connecting line in a same layer as a respective one of the plurality of voltage supply lines, connected to a first capacitor electrode through a first via, and connected to a semiconductor material layer through a second via; and an interference preventing block in a same layer as the second capacitor electrode. Along the first direction, a portion of the node connecting line at a position connecting to the semiconductor material layer through the second via is spaced apart from a first adjacent data line by a first arm, and is spaced apart from a second adjacent data line by a second arm.

Abstract: Embodiments of the present disclosure provide an acoustic output device, comprising: an acoustic output unit, a contact detection sensor, and a processor. The acoustic output unit includes a vibration unit and a casing, the casing at least including a contact region which is in contact with the face of a user; the contact detection sensor is located at the contact region; and the processor is configured to determine whether the user wears the acoustic output device based on an electrical signal generated when the contact detection sensor is in contact with the face of the user.

Abstract: Embodiments of this application provide a time synchronization method and a communication apparatus. The method includes: An access network device obtains first round-trip time information between the access network device and a terminal device, second round-trip time information between the access network device and a benchmark device, and third round-trip time information between the benchmark device and the terminal device; determines a delay from the access network device to the terminal device based on the obtained t round-trip time information; and sends the delay or an offset between the access network device and the terminal device to the terminal device, where the delay or the offset is used for time synchronization of the terminal device. In this solution, the access network device may accurately determine the offset or the delay, and the terminal device performs time synchronization based on the offset or the delay.

Abstract: A speaker includes a shell, a diaphragm, and a sliding connection portion. The shell includes a cavity. The diaphragm is accommodated within the cavity and separates the cavity to form at least two sub-cavities. The diaphragm is driven by an electrical signal to vibrate to generate sound. The sliding connection portion is configured to connect an edge of the diaphragm to an inner wall of the cavity. The sliding connection portion allows the edge of the diaphragm to slide relative to the inner wall of the shell. Therefore, the diaphragm can move (slide) relative to the inner wall of the shell. In other words, the diaphragm can make a piston-like movement relative to the inner wall of the shell, which allows the diaphragm to generate a greater displacement, push more air, and thereby improving the performance of the speaker, especially the sensitivity of the speaker at a low frequency range.

Abstract: An array substrate includes a driving circuit arranged on the base substrate, and the driving circuit includes a pull-up node control circuit, a first pull-down node control circuit, and an output circuit; the pull-up node control circuit controls a potential of the pull-up node; the first pull-down node control circuit controls to write a first control voltage provided by the first control voltage line into the first pull-down node; the output circuit controls the driving signal output terminal to output a driving signal under the control of the potential of the pull-up node; the array substrate also includes a first conductive portion arranged on the base substrate; the first conductive portion is electrically connected to the first control voltage line.

Abstract: Provided in the present invention are a dynamic collection device for an oil film and temperature distribution in a grinding zone and an operating method thereof. A spectroscope and a 45-degree flat mirror are utilized to carry out optical imaging of the permeation and infiltration of the grinding fluid in a grinding zone during a grinding process, and a video signal imported into a high-speed camera is converted into a digital signal processed by a CCD photosensitive element, and a dynamic image is imported for dynamic collection. Infrared radiation emitted from the grinding zone is reflected through the 45-degree flat mirror, and transmitted to the thermal imaging camera, and the signal is transmitted to an internal infrared detector. The infrared detector adjusts and amplifies the received signal and outputs it to an infrared thermal imaging chip. After image processing, the temperature distribution image is imported for dynamic collection.

Abstract: A loudspeaker comprising a diaphragm, a housing, and a cavity structure is provided. The diaphragm is configured to vibrate to produce air-conducted sound waves. The housing is configured to form an accommodation cavity for housing the diaphragm. The diaphragm divides the accommodation cavity into a front cavity and a rear cavity. The housing is provided with a sound outlet hole communicating with the front cavity, and at least a portion of the air-conducted sound waves is transmitted through the sound outlet hole to an exterior of the loudspeaker. The cavity structure is provided on the housing and communicated with at least one of the front cavity and the rear cavity, and the cavity structure is configured to absorb a sound wave with a target frequency in the air-conducted sound waves.

Abstract: Disclosed is an earphone comprising two speaker assemblies and a connection member. The connection member is used to connect the two speaker assemblies. The connection member provides a clamping force for placing the two speaker assemblies at a user's head through a bending deformation. The connection member includes a housing with an accommodation cavity, a capacitance sensor is disposed in the accommodation cavity, and the capacitance sensor is configured to identify a bending state of the connection member. The capacitance sensor includes a shielding structure that has a constant potential and is used to reduce an effect of an external electric field on the capacitance sensor.

Abstract: A target motor torque command value setting unit includes a basic torque command value setting unit that sets a basic torque command value, a correction unit that corrects a basic target torque set by a basic target torque setting unit using resonance control torque, and a motor torque command value computation unit that computes a motor torque command value based on the basic target torque following correction by the correction unit. The resonance control torque is a sum of a first torque obtained by multiplying a differential value of steering torque by a predetermined first gain, and a second torque obtained by multiplying the steering torque by a predetermined second gain.

Abstract: The embodiments of the present disclosure provide a touch sensor device. The touch sensor device comprises a housing, configured to provide a touch region; and at least one sensor, configured to be fixed near the touch region. The at least one sensor includes: a signal transmitting unit, configured to generate a vibration signal under the action of an excitation signal; a signal receiving unit, configured to receive the vibration signal and generate an output signal; and a processor, configured to recognize a touch operation performed on the touch region according to the output signal.

Abstract: A display panel includes an array substrate and a color filter substrate, where the color filter substrate includes a first substrate, spacer pillars, and color filter layers, each spacer pillar is in the spacing region, and each pixel region is provided with a color filter layer. Each spacer pillar includes at least one spacer layer each made of the same material as the color filter layer in one of the pixel regions. The array substrate includes a second substrate and a support layer, where the support layer is on a side of the second substrate facing the color filter substrate, and includes a body layer and a plurality of protrusions on a side of the body layer away from the second substrate, where each protrusion is each opposite to at least one of the spacer pillars. At least one of the spacer pillars is each supported on the corresponding protrusion.

Abstract: An analysis apparatus analyses a video image signal comprising successive frames of imaging an endoscopy procedure. A machine learning block analyses the video image signal using a machine learning technique that classifies regions of the frames as belonging to one of plural classes corresponding to respective types of image artefact. The classes include a motion blur class corresponding to motion blur of the image, at least one erroneous exposure class corresponding to a type of erroneous exposure of the image, and at least one noise artefact class corresponding to a type of image artefact that is noise. A quality score block derives quality scores representing image quality of the successive frames based on the classified regions.

Abstract: A micro-displacement measurement system having a picometer scale resolution and a measurement method. The measurement system comprises a probe module, a demodulation optical path module, a static lock-in amplification module, an upper computer module, and a micro-displacement drive module. The probe module comprises a measurement FBG sensor, a matching FBG sensor, a precision stainless steel needle tube, and an external support; the demodulation optical path module comprises an ASE broadband light source, a first circulator, a second circulator, and an InGaAs photodetector; the upper computer module comprises a data acquisition card and a computer; and the micro-displacement drive module comprises a piezoelectric ceramic nano-positioner, a piezoelectric ceramic driver, a three-dimensional precision micro-motion platform.

Abstract: The present invention relates to the technical field of probiotics, in particular to a Lactiplantibacillus plantarum GOLDGUT-LP618 having a function of resisting Salmonella infection and application thereof. The Lactiplantibacillus plantarum GOLDGUT-LP618 provided by the present invention is preserved in China General Microbiological Culture Collection Center, with the preservation number of CGMCC No. 28399. The strain has high resistance to acid and bile salt and can adapt to the digestive tract environment. The strain can inhibit Salmonella infection, relieve diarrhea, inflammation and intestinal damage caused by Salmonella infection, and promote intestinal health. The strain can be used for preparing functional foods, dietary supplements or drugs that can resist Salmonella infection and improve diarrhea and inflammation caused by Salmonella infection, and has good application prospects.

Abstract: Embodiments of the present disclosure provide an electrode structure including: a plurality of electrodes. Each of the plurality of electrodes is flexibly connected to at least another of the plurality of electrodes through a connector. The connection member allows electrically conduction of the connected electrodes. Electrode structures provided by embodiments of the present disclosure have a great elasticity coefficient range, and the electrode structures are adjustable.

Abstract: Provide a sensing device comprising a cavity and an air pressure sensor disposed within the cavity. The cavity includes two elastic walls disposed opposite to each other and a rigid wall connecting the two elastic walls, wherein the rigid wall is in a form of a tubular structure, and the two elastic walls are configured to seal the tubular structure to form the cavity. A deformation of the two elastic walls changes air pressure within the cavity, and the air pressure sensor is configured to generate an electrical signal in response to the change of the air pressure.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for training and using machine learning models to generate graphical user interfaces from textual descriptions.

Abstract: A gas turbine overspeed protection method includes: a power utilization load of a generator is acquired, and a rotating speed value of a gas turbine is acquired; whether the power utilization load suddenly decreases or disappears is judged, and if so, an eddy current retarder is controlled by a controller to simulate the power utilization load to provide a braking torque for the generator; or, whether the rotating speed value exceeds a set speed range is judged, and if so, the gas turbine is controlled by the controller to reduce fuel supply, and a discharge valve of a gas compressor is opened to discharge a high-pressure gas to reduce the power output and the rotating speed of the gas turbine.

Abstract: An apparatus includes a housing (e.g., a housing having a form factor of a molded case circuit breaker) and at least two phase terminals supported by the housing and configured to be connected to respective ones of at least two phase buses in an electrical panelboard. The apparatus further includes at least one fault generation device supported by the housing and including an arc containment chamber and first and second spaced-apart electrodes in the arc containment chamber and electrically coupled to respective ones of the at least two phase terminals.