Abstract: A method for preparing a benzofuran derivative. Specifically, the present invention relates to a method for preparing a benzofuran derivative represented by formula L The preparation method greatly improves yield and has good application prospects.

Abstract: An intelligent manufacturing industrial Internet of Things with a front split service platform for calibrating a binocular camera is provided, which includes: an obtaining module configured to obtain an image taken by a first camera on a production line as a first image data and an image taken by a second camera as a second image data through a sensor network platform; a three-dimensional module configured to process into three-dimensional image data; a recognition module configured to obtain a plurality of point positions of a distortion part as judgment point positions; a mapping module configured to map the judgment point positions to the second image data to form second calibration point positions; and a calibration module configured to calibrate the first camera and the second camera according to first calibration point positions and the second calibration point positions.

Abstract: An electric press with disc stacking, includes two sets of all-electric presses, a blank disc transporting and stacking all-in-one machine, and a control box. The blank disc transporting and stacking all-in-one machine includes a blank disc feeding mechanism, a cassette conveying mechanism, a product transporting and flipping mechanism, a product disc stacking mechanism, and a pallet feeding mechanism. During operation, the blank disc feeding mechanism feeds blank disc to a blank disc receiving station; the cassette conveying mechanism conveys the blank discs to a product loading station and install products in the blank discs; pallets are transported to the product disc stacking mechanism; the cassette conveying mechanism conveys the pallets with products loaded to a disc stacking station for a disc stacking operation, and after the disc stacking, conveys the products into the pallets for palletization.

Abstract: A stacking and palletizing device includes a cassette conveying mechanism, a product transporting and flipping mechanism, a product disc stacking mechanism, and a pallet feeding mechanism. The cassette conveying mechanism is provided thereon with an blank disc receiving station, a product loading station and a product disc stacking station; the product loading station is correspondingly provided with a cassette positioning mechanism; a cassette lifting and partitioning mechanism is disposed below the product disc stacking station; the product disc stacking mechanism includes a screw rod lifting mechanism, which is provided thereon with a palletizing and conveying mechanism; and a gantry truss transplanting mechanism is correspondingly disposed above the screw rod lifting mechanism.

Abstract: The present invention discloses a green knowledge recommendation method based on characteristic similarity and user demands, an electronic device and a computer readable storage medium thereof. The method includes: obtaining a current-search text e and a historical-search-texts set Eu both from a user; constructing a topics dictionary and a subtopics dictionary according to a green knowledge base, and decomposing the e and the Eu on the basis of semantic decomposition; picking words in a text-vector set and a valid-text set that about two dictionaries; finding the corresponding knowledge according to user satisfaction. The invention enables users to quickly find the required content through templating, thus avoiding users' meaningless search, improving search efficiency, and reducing the loss of useless time.

Abstract: Embodiments of the disclosure provide a control key and an electronic device. The control key includes: a circuit board having a capacitance detecting circuit therein; a fixing bracket provided with a conductive elastic sheet, the conductive elastic sheet being electrically connected to the circuit board; a control key body disposed on the fixing bracket, an outer side of the control key body having a manipulation surface and an inner side of the control key body being provided with a conductive sheet, the conductive sheet being electrically connected to the conductive elastic sheet, such that the conductive sheet is electrically connected to the capacitance detecting circuit.

Abstract: One or more embodiments of the present disclosure relates to an acoustic output device, including: a piezoelectric element configured to convert an electrical signal into a mechanical vibration; an elastic element; and a mass element connected to the piezoelectric element through the elastic element. The mass element may be configured to receive the mechanical vibration and generate an acoustic signal, and on a plane perpendicular to a vibration direction of the mass element, the elastic element may provide shear stresses with opposite curls.

Abstract: The present disclosure provides a method for evaluating a pipeline cleaning solution based on smart gas and an Internet of Things system. The method comprises: obtaining an operation feature of at least one gas pipeline and inspection data of the at least one gas pipeline; determining an area to be cleaned and an area feature of the area to be cleaned; generating at least one candidate pipeline cleaning solution based on the area feature of the area to be cleaned; processing each of the at least one candidate pipeline cleaning solution and the area feature through a pipeline cleaning effect prediction model to determine a pipeline cleaning effect of each of the at least one candidate pipeline cleaning solution; determining a pipeline cleaning solution based on the pipeline cleaning effect; and evaluating a pipeline cleaning effect of the pipeline cleaning solution based on an implementation of the pipeline cleaning solution.

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: 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: A communication device includes a first module and a second module, the first module acquiring first timing, the first timing being at least used for the first module to receive a signal from a first network device at a first band, and/or the first module acquiring second timing, the second timing being at least used for the first module to transmit a signal to the first network device at the first band; the first module acquiring third timing, the third timing being at least used for the second module to receive a third signal from a second network device at a second band, the third signal being used to be forwarded, and/or the first module acquiring fourth timing, the fourth timing being at least used for the second module to forward a processed fourth signal from a terminal equipment to the second network device at the second band.

Abstract: A communication device includes: a first module of a repeater acquires a first beam indication, the first beam indication being at least used by the first module to receive a signal from a first network device at a first band, and/or the first module of the repeater acquires a second beam indication, the second beam indication being at least used by the first module to transmit a signal to the first network device at the first band.

Abstract: A lighting apparatus includes a suspension grid frame, an elastic bracket, a driver module and a light module. The suspension grid frame is configured to be installed to a ceiling. The suspension grid frame defines a light container. The elastic bracket is fixed to the suspension grid frame. The driver module has a sidewall connector. The sidewall connector is configured to hook onto the elastic bracket, such that the driver module is fixed to the suspension grid frame. The sidewall connector remains attached to the elastic bracket unless an external force is applied to deform a portion of the elastic bracket. The light module is configured to be installed into the light container. The driver module is attached to the suspension grid frame prior to installation of the light module into the light container.

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: A communication device includes a first module and a second module, the first module acquires first TDD configuration, the first TDD configuration being at least used by the first module to receive a signal from a first network device and/or transmit a signal to the first network device at a first band; the first module acquires second TDD configuration, the second TDD configuration being at least used by the second module to receive a third signal from a second network device at a second band, the third signal being used to be forwarded, and/or, the second TDD configuration being at least used by the second module to forward a processed fourth signal to the second network device at the second band; and the first band and the second band do not overlap in a frequency domain.

Abstract: The present disclosure provides glasses including: a glasses rim; a glasses temple comprising a control circuit or a battery; a rotating shaft configured to connect the glasses rim and the glasses temple, so that the glasses rim and the glasses temple are able to relatively rotate around the rotating shaft, the rotating shaft being disposed with a rotating shaft wiring channel along an axial direction; a connection wire passing through the rotating shaft wiring channel and extending to the glasses rim and the glasses temple, respectively; a speaker comprising an earphone core and being connected to the glasses temple, the control circuit or the battery driving the earphone core to vibrate to generate a sound through the connection wire; and at least two microphones disposed in the glasses temple or the speaker, the at least two microphones being located at positions with different distances from a mouth of a user.

Abstract: Provided is an OLED display panel, the OLED display panel includes a touch layer, wherein the touch layer includes a via hole structure including: a first conductive layer, an interlayer insulating layer, and a second conductive layer that are sequentially arranged, wherein the interlayer insulating layer is provided with a via hole, the second conductive layer is overlapped with the first conductive layer by the via hole, and at least part of a surface, in contact with the second conductive layer, of the interlayer insulating layer is uneven; wherein the uneven surface has a roughness in a value range of 0.05d?r?0.19d, where r represents the roughness, and d represents a thickness of the interlayer insulating layer, the roughness of the uneven surface being a distance between a top of convex and a bottom of concave in the uneven surface.

Abstract: A water quality purification assembly includes a first water port, a second water port, an inner housing, an outer housing, a water filtering unit, and a flow guide member. The water filtering unit is provided in the inner housing; the flow guide member is provided between an outer wall surface of the inner housing and an inner wall surface of the outer housing. A first flow guide channel is defined between the inner housing and the outer housing; the first water port, the first flow guide channel, the inner housing, and the second water port are sequentially communicated. The first flow guide channel guides water in an extending direction of the first flow guide channel; and one of the first water port and the second water port is a water inlet, and the other of the first water port and the second water port is a water outlet.

Abstract: Multi-player co-located AR experiences are augmented by assigning characters and costumes to respective participants (a.k.a. “users” of AR-enabled mobile devices) in multi-player AR sessions for storytelling, play acting, and the like. Body tracking technology and augmented reality (AR) software are used to decorate the bodies of the co-located participants with virtual costumes within the context of the multi-player co-located AR experiences. Tracked bodies are distinguished to determine which body belongs to which user and hence which virtual costume belongs to which tracked body so that corresponding costumes may be assigned for display in augmented reality. A host-guest mechanism is used for networked assignment of characters and corresponding costumes in the co-located multi-player AR session. Body tracking technology is used to move the costume with the body as movement of the assigned body is detected.

Abstract: Method for monitoring low-temperature pipeline based on smart gas, including: obtaining gas data and pipeline data of each segment of a gas pipeline and weather data of a position of each segment of the gas pipeline; determining at least one target pipeline; determining icing data of the at least one target pipeline by processing the gas data, the pipeline data, and the weather data of the at least one target pipeline based on an icing prediction model, wherein the icing prediction model is a machine learning model; and generating a thawing instruction based on the icing data, and controlling a natural gas heating device to perform a thawing operation on the at least one target pipeline based on the thawing instruction.