Abstract: An audio processing method and apparatus, including decomposing an audio signal into a low-frequency subband signal and a high-frequency subband signal, obtaining a low-frequency feature of the low-frequency subband signal, obtaining a high-frequency feature of the high-frequency subband signal, feature dimensionality of the high-frequency feature being lower than feature dimensionality of the low-frequency feature, performing quantization encoding on the low-frequency feature to obtain a low-frequency bitstream of the audio signal, and performing quantization encoding on the high-frequency feature to obtain a high-frequency bitstream of the audio signal.

Abstract: A relay includes a contact container having a contact chamber and a pair of first through holes, a pair of static contact leading-out terminals respectively passing through the pair of first through holes, a moving part, a first magnetizer within the contact chamber and connected with the moving part; and a movable member including a movable contact piece and a second magnetizer. The movable contact piece may contact with or separate from the pair of static contact leading-out terminals. The first and second magnetizers are arranged at opposite sides of the movable contact piece and formed a magnetic circuit. The first magnetizer is movable relative to the movable member through the moving part and is configured to adjust a distance between the first magnetizer and the second magnetizer according to a value of a current flowing through the movable contact piece.

Abstract: A relay includes a contact container having a contact chamber and a pair of first through holes in communication with the contact chamber, a pair of static contact leading-out terminals passing through the pair of first through holes, respectively, a moving part movable relative to the contact container, a first magnetizer within the contact chamber and connected with the moving part; and a movable member within the contact chamber and including a movable contact piece. The first magnetizer is arranged at one side of the movable contact piece facing the static contact leading-out terminals. The first magnetizer is movable relative to the movable contact piece through the moving part and is configured to adjust a distance between the first magnetizer and the movable member according to a value of a current flowing through the movable contact piece.

Abstract: A deep-sea platform energy self-supply device and a control method therefor are disclosed. The device includes a working platform of a deep-sea platform, buoys mounted at a bottom of the working platform, wave energy piezoelectric assemblies disposed at the bottom of the working platform, and ocean current energy piezoelectric assemblies disposed at bottoms of the buoys. The present disclosure directly converts kinetic energy of fluid in the ocean into electric energy by using a wave energy piezoelectric plate and an ocean current energy piezoelectric plate, thereby supplying power to the deep-sea platform and achieving energy self-supply for the deep-sea platform. The device also dissipates kinetic energy of the fluid, such that the amplitude of waves decreases as the kinetic energy of the fluid decreases, thereby achieving a wave-dissipating effect, enhancing operational stability of the working platform, and extending the service life of the working platform.

Abstract: Provided is a method for synthesizing lactic acid monomers using sucrose as raw material. Through site-directed gene replacement genetic recombination technology, the method modifies the promoter sequence of the sucrose metabolism operon in the production strain, enabling it to maintain high-level expression throughout the entire production process of lactic acid monomers. The strain exhibits significant ability to efficiently catabolize sucrose for synthesizing lactic acid monomers (D-lactic acid or L-lactic acid) with high optical purity and high chemical purity. Fermentation levels of D-lactic acid and L-lactic acid for strains DSAPW5 and LSAPW5 at 25~50° C. for 28~30 hours can reach 158.58 g/L and 159.65 g/L, respectively, with optical purities of 99.94% and 99.95%. The present disclosure can be applied to the industrial production of lactic acid monomers using sucrose or sucrose-containing raw materials.

Abstract: A relay includes a contact container having a contact chamber and a pair of first through holes; a pair of static contact leading-out terminals respectively passing through the through holes; a moving part; a first magnetizer within the contact chamber and including a plurality of magnetic conductive sheets stacked with each other, the magnetic conductive sheets are connected with the moving part; and a movable member including a movable contact piece. The first magnetizer is arranged at one side of the movable contact piece facing the static contact leading-out terminals. The first magnetizer can be movable relative to the movable member through the moving part and is configured to adjust a distance between the first magnetizer and the movable member according to a value of a current flowing through the movable contact piece.

Abstract: A method for visual data processing comprises: performing a conversion between visual data and a bitstream of the visual data with a neural network (NN)-based model, a synthesis transform in the NN-based model comprising at least one upscaling layer, and each of the at least one upscaling layer being used for increasing a data dimension of respective input of the at least one upscaling layer.

Abstract: A solution for visual data processing is provided. A method for visual data processing is proposed. The method comprises: performing a conversion between visual data and a bitstream of the visual data with a neural network (NN)-based model, a pooling layer in the NN-based model being configured to be applied with a padding operation that is used for padding at least one sample for an input tensor of the pooling layer.

Abstract: An audio processing method includes: filtering an audio signal to obtain a low-frequency signal and a high-frequency signal; encoding the low-frequency signal to obtain a bitstream of the low-frequency signal; performing frequency domain transform on the low-frequency signal and the high-frequency signal respectively, to obtain a low-frequency spectrum and a high-frequency spectrum; performing spectral envelope extraction on the low-frequency spectrum and the high-frequency spectrum to obtain spectral envelope information, and performing spectral flatness extraction on the high-frequency spectrum to obtain spectral flatness information; and performing quantization encoding on the spectral flatness information and the spectral envelope information to obtain a bandwidth extension bitstream, and combining the bandwidth extension bitstream and the bitstream of low-frequency signal into an encoded bitstream.

Abstract: A machine learning model is trained to detect candidate locations of instances of entity types within a document. The model comprises region-based convolutional neural networks with classifier layers corresponding to the entity types. A trained version of the model is stored. In response to a programmatic request, an indication of contents of a target document is provided using at least the trained version of the model.

Abstract: A turn table includes a tray with heart-shaped and straight sliding rails and a base with first and second rods, wherein the first rod is slidably matched with the heart-shaped sliding rail, and the second rod is slidably matched with the straight sliding rail. When the tray is at an initial position, symmetrical lines of the bottom of the tray and the heart-shaped sliding rail are collinear, and the straight sliding rail extends along the symmetrical line of the heart-shaped sliding rail. When the tray switches from the initial position to a picking position, the first rod slides along the heart-shaped sliding rail and the second rod slides along the straight sliding rail, making the tray rotate circumferentially relative to the base with an outer circumferential surface thereof being prevented from interfering with an inner wall of a chamber for placing the turntable and thus accommodating the tray therein.

Abstract: A magnetic circuit system comprising a coil, a movable magnetizer and a stationary magnetizer, respectively provided at adaptive positions, so that the magnetic pole surface of the movable magnetizer and the magnetic pole surface of the stationary magnetizer are in opposite positions with preset magnetic gaps, and the movable magnetizer is attracted to the stationary magnetizer when the coil is energized, and further comprising a protrusion fitted at one of the movable magnetizer and the stationary magnetizer that modifies magnetic attractive force between the movable magnetizer and the stationary magnetizer.

Abstract: A solution for visual data processing is provided. A method for visual data processing is proposed. The method comprises: performing a first conversion between visual data and a bitstream of the visual data with a neural network (NN)-based model, the first conversion comprising at least one of the following: converting, based on a first predetermined order, a first tensor having more than one dimension to a one-dimensional first array, the first tensor and the first array storing first data associated with the visual data, and the first predetermined order indicating a correspondence between samples of the first tensor and samples of the first array, or converting, based on a second predetermined order, a one-dimensional second array to a second tensor having more than one dimension, the second tensor and the second array storing second data associated with the visual data.

Abstract: Embodiments of the present disclosure provide a solution for visual data processing. A method for visual data processing is proposed. The method comprises: performing a conversion between visual data and a bitstream of the visual data with a neural network (NN)-based model, wherein a first format for coding the visual data and a second format of output visual data from the conversion are indicated with different indications, the first format indicates a first relationship between a size of a first component of the coded visual data and a size of a second component of the coded visual data, and the second format indicates a second relationship between a size of a first component of the output visual data and a size of a second component of the output visual data.

Abstract: Embodiments of the present disclosure provide a solution for visual data processing. A method for visual data processing is proposed. The method comprises: performing a conversion between visual data and a bitstream of the visual data with a neural network (NN)-based model, a color transformation between an internal color format and an output color format associated with the conversion being allowed to be disabled.

Abstract: Provided is an audio transcoding method, including: (301) performing entropy decoding on a first audio stream with a first bitrate, to obtain an audio feature parameter and an excitation signal of the first audio stream, the excitation signal being a quantized audio signal; (302) obtaining a time-domain audio signal corresponding to the excitation signal based on the audio feature parameter and the excitation signal; (303) re-quantizing the excitation signal and the audio feature parameter based on the time-domain audio signal and a target transcoding bitrate, to obtain a target excitation signal and a target audio feature parameter; and (304) performing entropy coding on the target audio feature parameter and the target excitation signal, to obtain a second audio stream with a second bitrate, the second bitrate being lower than the first bitrate.

Abstract: The present application discloses a method for generating an edge cutting line for an orthodontic aligner, an orthodontic aligner, and a computer-readable medium in the field of orthodontic treatment. The generating method includes: identifying a tooth contour of a dental model corresponding to at least one first tooth, and obtaining a first region corresponding to the tooth contour; determining a second region corresponding to an attachment, wherein the attachment is located at least partially on the orthodontic aligner corresponding to at least a portion of the at least one first tooth or an interdental space, wherein the orthodontic aligner is related to the dental model; when the first region cannot completely cover the second region, generating an edge cutting line for the orthodontic aligner based on the second region, wherein the edge cutting line is configured to cut the orthodontic aligner.

Abstract: An integrated process and system for measurement and treatment of toxic gases in deep natural gas. The process comprises: cooling and depressurizing deep natural gas and then drying same; sequentially performing radon, hydrogen sulfide, and mercury measurements on the dried deep natural gas; if it is found after the measurements that the concentrations of radon, hydrogen sulfide, and mercury in the deep natural gas are substandard, sequentially performing harmless treatment on radon and partial mercury, hydrogen sulfide, and remaining mercury in the deep natural gas; sequentially performing mercury, radon, and hydrogen sulfide measurements on the deep natural gas having experienced the harmless treatment; and if the concentrations of mercury, radon, and hydrogen sulfide in the deep natural gas are substandard, continuing to sequentially perform harmless treatment on radon and partial mercury, hydrogen sulfide, and remaining mercury in the deep natural gas, until the concentrations thereof reach the standards.