Abstract: Disclosed are an image coding and decoding methods, an image processing device, and a computer storage medium. The image coding method comprises: obtaining a dynamic range of a copy parameter of a current coding sampling value segment according to a size of a reference area; and coding the copy parameter according to the dynamic range to generate a video bitstream containing information about the size of the reference area and information about the copy parameter. The decoding method comprises: parsing a video bitstream to obtain a dynamic range of a copy parameter of a decoding sampling value segment; and decoding the copy parameter according to the dynamic range.

Abstract: Techniques include flowing a multiphase fluid from a hydrocarbon production well through a conduit; measuring, with an ultrasonic tomographic multiphase flow meter (UMM), ultrasonic waveforms generated by the UMM from the multiphase fluid; measuring properties of the multiphase fluid with fluid measurement sensors coupled to the conduit; identifying the ultrasonic waveforms and the properties with a machine-learning control system; determining multiphase fractions of the multiphase fluid from the one or more ultrasonic waveforms with a first ML model; determining a total flow rate of the multiphase fluid from the measured properties of the multiphase fluid with a second ML model; and determining a volumetric flow rate of a liquid phase or a gas phase based on the determined multiphase fraction and the determined total flow rate.

Abstract: A clock synchronization method includes receiving, by a receiving apparatus, a plurality of data blocks using a plurality of physical layer modules (PHYs), where the plurality of data blocks include a plurality of head data blocks, performing, by the receiving apparatus, timestamp sampling on the plurality of data blocks to generate a plurality of receipt timestamps, aligning, by the receiving apparatus, the plurality of receipt timestamps using a first receipt timestamp as a reference, generating, by the receiving apparatus, a clock synchronization packet based on the plurality of data blocks, and writing, by the receiving apparatus, a value of a second receipt timestamp into the clock synchronization packet, where the second receipt timestamp is a receipt timestamp that is of a second data block and that is determined based on the plurality of aligned receipt timestamps.

Abstract: A planar optical waveguide based on two-dimensional grating includes an optical waveguide substrate which is a transparent plane-parallel plate, and a functional grating element which includes a two-dimensional grating having two grating directions with an angle of 60° in between. The two-dimensional grating is either protruded or recessed into the top surface of the optical waveguide substrate. The output image from a micro-projector can enter the optical waveguide and then gets projected to cover the entire area of the functional grating element, enabling a human eye to view the output image across a large eye-box.

Abstract: Embodiments of the present disclosure describe frequency detection techniques for detecting power irregularities. These irregularities may include variations or abnormalities in switched-mode power supply circuit switching behavior, power spikes, and/or output oscillations. The frequency detection techniques may compare different frequency components of the power signal to detect irregularities.

Abstract: A display apparatus including a circuit board, a plurality of light-emitting devices and a display panel is provided. The light-emitting devices are disposed on the circuit board and electrically connected to the circuit board. The display panel is disposed on the light-emitting devices. The display panel includes a peripheral light-shielding pattern. An opening portion of the peripheral light-shielding pattern defines an active area of the display panel. A physical portion of the peripheral light-shielding pattern defines a non-active area of the display panel. An optical axis of a light-emitting surface of at least one of the light-emitting devices is located at a junction of the active area and the non-active area, at the non-active area, or at the active area and a side wall of the at least one of the light-emitting devices is located at the junction of the active area and the non-active area.

Abstract: A method for information encoding and decoding, and method for information storage and interpretation are provided. The information encoding method includes: first binary information and second binary information as well as a first encoding rule and a second encoding rule are obtained; a first output candidate symbol corresponding to a current input of the first binary information is obtained and a second output candidate symbol corresponding to a current input of the second binary information is obtained, and an intersection of the first output candidate symbol and the second output candidate symbol is taken as an output corresponding to a current input; and an output symbol corresponding to each binary bit of the first binary information and the second binary information is sequentially determined through the first encoding rule and the second encoding rule, as to obtain an encoding sequence formed by a plurality of the output symbols.

Abstract: An optical waveguide includes an input diffractive optical element arranged for being aligned with an optical projector for diffracting the light beam therefrom, a waveguide substrate arranged for reflecting the light beam diffracted by the input diffractive optical element by means of total internal reflection, and an output diffractive optical element coupled at said waveguide substrate for partially diffracting the light beam as a diffracted light and partially transmitting the light beam as a transmitted light during the total internal reflection of the light beam within the waveguide substrate. The diffracted light is diffracted by the output diffractive optical element and is projected out of the waveguide substrate toward the user eye. The transmitted light is continuously transmitted and reflected within the waveguide substrate by the total internal reflection until the transmitted light is totally diffracted out of the waveguide substrate, so as to complete an exit pupil expansion.

Abstract: A protective tube for sealed introduction into a process vessel at a process vessel port, the protective tube comprising a sealing base element which is connected onto the process vessel port and an elongate body with a bore. The elongate body comprises a closed distal end and an open proximal end, which is sealingly connected onto the sealing base element. The protective tube also comprises a receiving part, which is connected or attached onto the elongate body inside the process vessel so as to receive and hold a secondary temperature sensor from inside the process vessel. In addition, a reference temperature sensor is insertable into the bore from outside the process vessel. Also provided is a temperature measurement arrangement and a method for a temperature measurement in a process vessel.

Abstract: A clock synchronization method includes receiving, by a receiving apparatus, a plurality of data blocks using a plurality of physical layer modules (PHYs), where the plurality of data blocks include a plurality of head data blocks, performing, by the receiving apparatus, timestamp sampling on the plurality of data blocks to generate a plurality of receipt timestamps, aligning, by the receiving apparatus, the plurality of receipt timestamps using a first receipt timestamp as a reference, generating, by the receiving apparatus, a clock synchronization packet based on the plurality of data blocks, and writing, by the receiving apparatus, a value of a second receipt timestamp into the clock synchronization packet, where the second receipt timestamp is a receipt timestamp that is of a second data block and that is determined based on the plurality of aligned receipt timestamps.

Abstract: A foldable electric bed frame is provided which comprises a bottom frame and a push rod; a first board and a second board hinged to each other are disposed on the top of the bottom frame, one end of the push rod is rotatably connected to a side edge of the second board through a connection device which comprises a height adjusting piece and a height locking piece; a distance from the height adjusting piece to the second board in a working state is larger than a distance from the height adjusting piece to the second board in a folded state, and the height locking piece locks a position of the height adjusting piece in the working state to solve the problem of an increased thickness of a folded bed board resulting from increase of an angle of inclination of a push rod in the prior art.

Abstract: The present application discloses a standing vertical lower limb exercise device. The lower limb exercise device includes two major pivotal members, a horizontal bridge member that connects the major pivotal members, a stretchable spring, a string member for limiting a split angle formed by the two major pivotal members, and wheels, gears, and shafts to facilitate movement of the two major pivotal members. The stretchable spring and string member are coupled between the two major pivotal members. Wheels are coupled to each major pivotal member.

Abstract: The present invention discloses a display stand has a mounting seat connected on a support structure, internally provided with an accommodating cavity and having a slot communicated with the accommodating cavity at the top in an open way, a supporting arm having an insertion end capable of being inserted into the accommodating cavity of the mounting seat from the slot of the mounting seat, and a locking mechanism disposed on the mounting seat or supporting arm, for locking or unlocking the insertion end of the supporting arm in the accommodating cavity. When the insertion end of the supporting arm is locked, the supporting arm is limited within the accommodating cavity of the mounting seat, and when the insertion end of the supporting arm is unlocked, the insertion end of the supporting arm may be taken out from the slot of the mounting seat.

Abstract: Disclosed are an image encoding and decoding method, image processing device, and computer storage medium. the image coding method includes: when copying coding is performed on a current coding block by using one of the at least two different palette and pixel string copying coding manners, generating a new palette color according to pixels of the current coding block; generating a palette for the current coding block according to the new palette color and a palette color candidate set shared by the at least two different palette and pixel string copying coding manners; and performing palette and pixel string copying coding by using the palette for the current coding block, and generating a video bitstream comprising a copying manner and a copying parameter.

Abstract: A display apparatus including a circuit board, a plurality of light-emitting devices and a display panel is provided. The light-emitting devices are disposed on the circuit board and electrically connected to the circuit board. The display panel is disposed on the light-emitting devices. The display panel includes a peripheral light-shielding pattern. An opening portion of the peripheral light-shielding pattern defines an active area of the display panel. A physical portion of the peripheral light-shielding pattern defines a non-active area of the display panel. An optical axis of a light-emitting surface of at least one of the light-emitting devices is located at a junction of the active area and the non-active area, at the non-active area, or at the active area and a side wall of the at least one of the light-emitting devices is located at the junction of the active area and the non-active area.

Abstract: Disclosed is a large-scale crop phenology extraction method based on a shape model fitting method. The method comprises: acquiring a multi-year vegetation index time sequence curve in a localized geographic region; performing smooth fitting on the vegetation index time sequence curve by using a dual logistic function fitting means; establishing shape models by using reference curves and reference points of agrometeorological stations; performing shape model fitting by means of transformation; and obtaining a phenological period extraction value of the localized geographic region by means of calculation using the optimal scaling parameter. According to the present invention, macroscopic features of the curve are used, such that the influence of localized fluctuation and noise of the curve can be reduced, and a better extraction precision is obtained; and each phenological period of a crop can be extracted at the same time.

Abstract: A crop yield estimation method based on spatio-temporal deep learning including: obtaining regional historical crop yield data and meteorological data, preprocessing the meteorological data and the yield data to respectively obtain meteorological parameters and a detrended yield as input and output of the crop yield spatio-temporal deep learning model; constructing the spatio-temporal deep learning model for crop yield estimation, and optimizing hyperparameters; and building a training set by taking the meteorological parameters as an input and the detrended yield as output to train the model and obtain parameters of the model; for the crop yield to be estimated, feeding meteorological parameters into the trained model, and obtaining the crop yield estimation result. The model combined temporal and spatial learning to achieve better crop yield estimation accuracy and stability at large spatial scales.

Abstract: The present invention provides a driving circuit for a driving hip. The driving circuit includes a bootstrap circuit with a bootstrap voltage terminal. A power terminal of a high-voltage driving circuit is connected to the bootstrap voltage terminal, and a ground terminal of the high-voltage driving circuit is connected to a regulating terminal. A high-side drive circuit includes a high-side pull-up circuit and a high-side pull-down circuit. The driving circuit includes: an auxiliary power terminal; a mirror current source an input terminal of the mirror current source being connected to the bootstrap voltage terminal; a first MOS transistor; a second MOS transistor an equivalent diode component, an output terminal of the second MOS transistor being connected to the regulating terminal through the equivalent diode component; and an equivalent resistance component, the gate of the first MOS transistor being connected to the regulating terminal through the equivalent resistance component.

Abstract: A transaction card is provided for communicating with a computing device. The transaction card may comprise a computer interface device, at least one memory, at least one processor, and a card reader module. The card reader module configured to receive, from the computing device through the computer interface device, a first data packet comprising a request associated with a transaction, the first data packet being compatible with an interface protocol. The card reader module may process the first data packet to generate a second data packet compatible with the payment authentication protocol; provide the second data packet to the processor; receive, from the processor, a third data packet comprising a response to the request; process the third data packet to generate a fourth data packet based on the response, the fourth data packet compatible with the interface protocol; and transmit, to the computer interface device, the fourth data packet.

Abstract: Disclosed is an optical component (20) applied to a depth camera having a light source (11). The optical component (20) includes a light-homogenized element (21) having a microlens array (212) and a receiving lens (22). The light-homogenized element (21) is arranged on a light beam propagation path of the light source (11), and is used for modulating a light field emitted by the light source (11) of the depth camera to form a light beam which is not interfered to form light and dark stripes. The receiving lens (22) is adapted to a field angle of the light-homogenized element (21), and the receiving lens (22) is configured to allow at least a part of the light beam passing through the light-homogenized element (21) to enter the receiving lens (22) after being reflected by a target object. The optical component (20) is beneficial to acquiring complete and clear image information of a target object.