Abstract: An information feedback method, device and system are provided. The method includes: determining, by a first communication node, feedback information for indicating a status of communication links between the first communication node and a serving communication node, where the feedback information includes at least one of the following: failure information of a first type of transmission link, a request for training signal of transmission modes and/or a request for training signal of receiving modes, and indication information of M preferred transmission links, and the first type of transmission link and the M preferred transmission links include transmission links from the serving communication node to the first communication node, where M is a positive integer greater than or equal to 1; and transmitting, by the first communication node, the feedback information to the serving communication node.

Abstract: Disclosed are a magnetic structure of a voice coil motor, a voice coil motor, a zoom lens and a photographic equipment. The magnetic structure of the voice coil motor is applied on a zoom lens and includes a yoke assembly and a magnetic stripe assembly; the yoke assembly includes two annular yoke bodies provided side by side in the first direction. The central axis of each annular yoke body is provided along the second direction. Each annular yoke body is extended along the third direction. The two annular yoke bodies are provided with two first yoke sections that are close to each other and two second yoke sections that are far away from each other in the first direction.

Abstract: Disclosed are a voice coil motor a zoom lens and a photography device. The voice coil motor includes a machine shell, a magnet structure, a mover structure and a drive structure. The magnet structure is provided on the machine shell and includes an annular magnetic yoke. The mover structure includes a plurality of mover coils, and the plurality of mover coils are movably sleeved on a yoke section of the annular magnetic yoke. The drive structure includes a plurality of drive chips and the plurality of drive chips are electrically connected to the plurality of mover coils respectively.

Abstract: Disclosed are a voice coil motor, a zoom lens and a photography device. The voice coil motor includes a machine shell, an annular magnetic yoke, a plurality of magnets and a mover structure. The annular magnetic yoke is provided on the machine shell. The plurality of magnets are provided in the annular magnetic yoke and are provided at interval along a length direction of the annular magnetic yoke. The mover structure includes a mover coil movably sleeved on a yoke section of the annular magnetic yoke.

Abstract: The present disclosure relates to a process and a device for producing vinyl acetate by an ethylene process. By additionally arranging an ethylene recovery membrane assembly in a vinyl acetate synthesis section, the content of inert components such as nitrogen in a circulating system is controlled, ethylene gas is recovered from non-condensable gas, and a recovery rate of the ethylene reaches 58% or above. By adding sideline extraction at a refined VAC tower in a vinyl acetate refining section, a vinyl acetate product with purity higher than 99.98% is obtained, a mass fraction of acetic acid is less than or equal to 20 ppm, a mass fraction of acetaldehyde is less than or equal to 20 ppm, and a mass fraction of water is less than or equal to 100 ppm. In synthesis and refining processes of the vinyl acetate, a cooling method is adopted.

Abstract: Provided are a fused tricyclic cyclin-dependent kinase inhibitor, and a preparation method therefor and a pharmaceutical use thereof. In particular, the structure of the fused tricyclic cyclin-dependent kinase inhibitor is shown in formula I, wherein substituents are defined in the description. The fused tricyclic cyclin-dependent kinase inhibitor is used for preventing and/or treating cyclin-dependent kinase related diseases, in particular cancers.

Abstract: A blackboard eraser cleaning device is provided and includes an outer shell (1). A cover (2) is arranged at the upper part of the outer shell (1), an inner shell (3) is arranged inside the outer shell (1). A clamping mechanism (19) is arranged at the upper end of the inner shell (3). A leaning station (8) is defined inside the clamping mechanism (19). A cylinder (9) is arranged around the clamping mechanism (19). A height adjustment mechanism (10) is arranged inside the outer shell (1). The height adjustment mechanism (10) includes a servo (101) arranged inside the outer shell (1) and located on a side of the inner shell (3). According to the present application, a variety of cleaning modes may be achieved to meet the actual usage of the blackboard eraser.

Abstract: A method for regulating an unmanned aerial vehicle (UAV) includes receiving a UAV identifier and one or more types of contextual information broadcasted by the UAV. The UAV identifier uniquely identifies the UAV from other UAVs. The one or more types of contextual information includes at least geographical information of the UAV. The method further includes authenticating, via an authentication device, an identity of the UAV based on the UAV identifier to determine whether the UAV is authorized for operation, and transmitting a signal to a remote device in response to determining whether the UAV is authorized for operation.

Abstract: A blackboard eraser cleaning device is provided and includes an outer shell (1). A cover (2) is arranged at the upper part of the outer shell (1), an inner shell (3) is arranged inside the outer shell (1). A clamping mechanism (19) is arranged at the upper end of the inner shell (3). A leaning station (8) is defined inside the clamping mechanism (19). A cylinder (9) is arranged around the clamping mechanism (19). A height adjustment mechanism (10) is arranged inside the outer shell (1). The height adjustment mechanism (10) includes a servo (101) arranged inside the outer shell (1) and located on a side of the inner shell (3). According to the present application, a variety of cleaning modes may be achieved to meet the actual usage of the blackboard eraser.

Abstract: A feature enhancement and data augmentation method for detecting at least one action of at least one tested subject is provided. The feature enhancement and data augmentation method includes obtaining at least one spectrogram; and performing a feature enhancement processing on the at least one spectrogram, to enhance at least one feature corresponding to at least one action in the at least one spectrogram and generate at least one feature enhanced spectrogram. The feature enhancement processing comprises a directional filtering.

Abstract: In accordance with some embodiments, systems, methods, and media for material decomposition and virtual monoenergetic imaging from multi-energy computed tomography data are provided. In some embodiments, a system comprises: at least one hardware processor configured to: receive a multi-energy computed tomography (MECT) image of a subject; provide the MECT data to a trained convolutional neural network (CNN); receive output from the trained CNN indicative of predicted material mass density for each of a plurality of materials at each pixel location of the MECT data, wherein the plurality of materials includes at least four materials; and generate a transformed version of the MECT data using the output.

Abstract: The present disclosure relates to a method for producing vinyl acetate, comprising a vinyl acetate synthesis process, a vinyl acetate refining process and a separation process of vinyl acetate and ethyl acetate, including an acetic acid evaporator, an oxygen mixer, a vinyl acetate synthesis reactor, a first gas separating tower, a second gas separating tower, a recovered gas compressor, a water washing tower, an absorption tower and a desorption tower, a recycling gas compressor; the vinyl acetate refining process comprising an acetic acid tower, a crude VAC tower, and a fine VAC tower, a rectifying tower, an ethyl acetate tower, a water phase receiving tank, an extracting and rectifying tower and an ethyl acetate phase separator.

Abstract: The present disclosure provides a soft ground cleaning vehicle, including a main body frame; wherein each of both sides of the main body frame is arranged with a screw propulsion mechanism, and a lower portion of each of the both sides of the main body frame is arranged with a bottom frame; a power assembly is arranged on the bottom frame, and an extension frame is arranged on a lower portion of the bottom frame; the extension frame is arranged with a rotation assembly; a plastic track is arranged on the power assembly and the rotation assembly; a plurality of stand plates are arranged on an outer strip surface of the plastic track.

Abstract: A display panel and a manufacturing method thereof are provided. The display panel includes a base substrate, a first active layer, a first gate insulating layer, a first gate layer, and a second gate insulating layer stacked in sequence on the base substrate, and a metal layer, a first interlayer dielectric layer, a first source, and a first drain. A first metal portion and a second metal portion of the metal layer are respectively filled in a first through hole and a second through hole of the second gate insulating layer and are electrically connected to the first active layer.

Abstract: The present disclosure relates to a thermal coupling method for preparing ethylene by ethanol dehydration and device thereof. The device includes an ethanol dehydration reaction system, a quenching compression system, an alkaline washing system, a molecular sieve drying system and an ethylene purification and propylene refrigeration cycle system; ethanol dehydration reaction products in the ethanol dehydration reaction system serve as a heat source for preheating, vaporization and superheating of a raw material of ethanol; tower bottoms of an evaporation tower in the quenching compression system serve as a heat source for preheating of a feed stream of the evaporation tower and heating of an overhead gas of a quenching tower; products of ethylene in the alkaline washing system serve as a cold source for cooling of crude ethylene.

Abstract: The present invention relates to a preparation system of ethylene by ethanol dehydration and device thereof. The device includes an ethanol dehydration reaction system, a quenching compression system, an alkaline washing system, a molecular sieve drying system, an ethylene purification system and a propylene refrigeration cycle system. Part of ethylene produced by the ethylene purification system are used as circulating ethylene in the molecular sieve drying system for desorption regeneration of molecular sieve drying towers. The molecular sieve drying system includes the steps: (1) feeding crude ethylene and water from the alkaline washing system into the molecular sieve drying system, and after removing the water therefrom, feeding the obtained crude ethylene into the ethylene purification system; and (2) feeding part of the products of ethylene, as the circulating ethylene, produced by the ethylene purification system into the molecular sieve drying system.

Abstract: A wearable device with heart rate detection includes a heart rate detection assembly and a processor. The heart rate detection assembly is configured to obtain a plurality of dynamic heart rate signals according to a default frequency. The processor includes a finite state machine and a storage. The storage is configured to store the plurality of dynamic heart rate signals, and the finite state machine determines a heart rate state according to a sampling parameter and the plurality of dynamic heart rate signals. The processor obtains a weight according to the heart rate state, and obtains a dynamic heart rate value according to the weight.

Abstract: The present disclosure provides an anti-loosening screw pair and an anti-loosening screw component. The screw pair includes a first screw component provided with a first screw thread and a second screw component whose outer wall surface is provided with a second screw thread. The first and second screw components are in threaded connection. In a direction of the first screw component being screwed into the second screw component, sides of the first and second screw threads pressing against each other are formed into force-bearing fitting faces respectively, and opposite sides thereof are formed into non-force-bearing fitting regions respectively. At least one of the force-bearing fitting faces and the non-force-bearing fitting regions of the first and the second screw components is provided with a stopper so as to prevent radial displacement between the first and the second screw components.

Abstract: The present disclosure relates to a method for producing vinyl acetate, comprising a vinyl acetate synthesis process, a vinyl acetate refining process and a separation process of vinyl acetate and ethyl acetate, including an acetic acid evaporator, an oxygen mixer, a vinyl acetate synthesis reactor, a first gas separating tower, a second gas separating tower, a recovered gas compressor, a water washing tower, an absorption tower and a desorption tower, a recycling gas compressor; the vinyl acetate refining process comprising an acetic acid tower, a crude VAC tower, and a fine VAC tower, a rectifying tower, an ethyl acetate tower, a water phase receiving tank, an extracting and rectifying tower and an ethyl acetate phase separator.