Abstract: Disclosed is a method (100) for correcting artifacts in Optical Coherence Tomography (OCT) images. The method involves acquiring an OCT image and subsequently transforming it from a Cartesian coordinate system to a polar coordinate system via polar reconstruction, generating a reconstructed polar OCT image. This image is then segmented into RED, GREEN, BLUE color channels. Fourier transformation is applied to each channel, transitioning them into their frequency domain representations. A custom frequency mask is utilized on these images, filtering out artifact-related frequencies. Following this, an inverse Fourier transformation is executed, reverting the images back to their Cartesian format. These images are then combined to produce a reconstituted OCT image. Further, this reconstituted image is merged with the original OCT image, resulting in an OCT image that is substantially free from artifacts.

Abstract: The invention provides a prediction method for critical vibration speed of a six-high cold rolling mill based on a three-dimensional model. The critical vibration speed is predicted based on a three-dimensional six-high cold rolling mill model, under the consideration that the rolls shall be considered as short and thick beams and influence of shear deformation needs to be considered, Timoshenko beams are selected, and besides, Hermite interpolation is used for node displacement vectors; a vertical vibration dynamic equation of the mill-strip system can be established by stress analysis among the strip, rolls and mill housing; solving is performed by the Newmark-Beta method, a displacement response curve of the rolls at a specific speed can be obtained, and if the amplitude of displacement response curve is constant, the speed is the critical vibration speed of the six-high rolling mill.

Abstract: Disclosed in the embodiments of the present application are a data storage method and apparatus, a device, and a non-transitory readable storage medium. According to the embodiments of the present application, F parity blocks occupying blank storage areas are added to a RAID system, which not only increases error tolerance but also eliminates the need for additional parity disks. During data storage, corresponding original check codes are solved according to an original encoding method, and additional check codes located on the parity blocks are solved simultaneously. Thus, it is possible to recover more erroneous data based on the original check codes and the additional check codes. When an error occurs in a disk in which any block in a stripe is located and data loss occurs in other blocks of the same stripe, the corresponding data can still be recovered.

Abstract: The present invention provides a process for producing a solid catalyst component without using internal electron donors, prepared by reacting an alkoxymagnesium compound with an acyl halide and/or sulfinyl halide and/or sulfonyl halide compound, and an alkanol and/or an alkanediol to form reaction product (A), optionally reacting the reaction product (A) with an organohalide and oranophosphorus compound to form reaction product (B), reacting the reaction product (B) with a halogen-containing titanium or vanadium compound to obtain the solid catalyst component (C). The solid catalyst component can be used in a olefin polymerization catalyst system to produce polypropylene polymers with high activity, high stereo-regularity, and good morphology.

Abstract: Systems and methods for improving output stability of an RFPA. The systems may obtain an initial radio frequency signal to be amplified by the RFPA. The systems may also generate a compensated radio frequency signal by performing, based on a preset compensation rule and a set of compensation parameters, a gain compensation operation for the initial radio frequency signal. The set of compensation parameters may include a supply voltage of the RFPA and a transistor junction temperature of the RFPA. The systems may further generate, by performing a non-linear correction operation on the compensated radio frequency signal, a corrected radio frequency signal, which is transmitted to the RFPA.

Abstract: The present application provides a motor and an electronic device, where the motor includes a housing, a first electric vibration part, and a mass block; an accommodating cavity is disposed in the housing, the first electric vibration part and the mass block are disposed in the accommodating cavity, a first end of the first electric vibration part is connected to the housing, and a second end of the first electric vibration part is connected to the mass block; and when a voltage is applied to the first electric vibration part, the first electric vibration part drives the mass block to move.

Abstract: A method of video decoding includes receiving a bitstream that comprises coded information of a current block, the coded information of the current block includes coded bits of quantized transform coefficients in a transform domain of the current block, the coded information is also indicative of at least a scaling factor to be used during a dequantization of the quantized transform coefficients. The method also includes determining one or more quantization shifting offsets for a reconstruction of transform coefficients in the transform domain based on at least the scaling factor, reconstructing the transform coefficients from the quantized transform coefficients based on the one or more quantization shifting offsets, calculating residuals in a spatial domain of the current block based on the transform coefficients in the transform domain, and reconstructing the current block according to the residuals in the spatial domain.

Abstract: This present invention relates to a method for using halogenation agents to react with magnesium precursor or with magnesium complexes to form catalyst components without using internal electron donors. The catalyst components are used to produce polypropylene with good productivity and high stereospecificity. This method offers a wide range of catalyst component preparations and selections to enhance the catalyst component applications regarding activity, stereospecificity, hydrogen response, molecular weight, and distributions.

Abstract: In various examples, sensor data representative of an image of a field of view of a vehicle sensor may be received and the sensor data may be applied to a machine learning model. The machine learning model may compute a segmentation mask representative of portions of the image corresponding to lane markings of the driving surface of the vehicle. Analysis of the segmentation mask may be performed to determine lane marking types, and lane boundaries may be generated by performing curve fitting on the lane markings corresponding to each of the lane marking types. The data representative of the lane boundaries may then be sent to a component of the vehicle for use in navigating the vehicle through the driving surface.

Abstract: Provided are a cooking device, a control method and apparatus thereof, and a computer-readable storage medium. The cooking device includes a microwave module, a hot air module, a heating tube module, and a fan module. The method includes: obtaining a characteristic parameter of a food material and a cooking stage of the cooking device; determining a cooking parameter of the cooking device according to the characteristic parameter of the food material; and controlling at least one of the microwave module, the hot air module, the heating tube module, and the fan module according to the cooking parameter and the cooking stage.

Abstract: A virtual reality interaction method and apparatus, a device and a storage medium are provided. The method includes: displaying, on a terminal, a real-time captured real-world scene image; wherein the real-world scene image includes a virtual model; extending a scene edge of the virtual model towards a screen edge of the terminal; switching a scene image displayed on the terminal from the real-world scene to a virtual scene in response to detecting that a viewpoint of the terminal crosses a plane where the scene edge of the virtual model located,; and obtaining an interactive instruction for the virtual scene and displaying an interactive effect corresponding to the interactive instruction.

Abstract: Methods and devices are provided for allowing a mobile device (e.g., a key fob or a consumer electronic device, such as a mobile phone, watch, or other wearable device) to interact with a vehicle such that a location of the mobile device can be determined by the vehicle, thereby enabling certain functionality of the vehicle. A device may include both RF antenna(s) and magnetic antenna(s) for determining a location of a mobile device relative to the vehicle. Such a hybrid approach can provide various advantages. Existing magnetic coils on a mobile device (e.g., for charging or communication) may be re-used for distance measurements that are supplemented by the RF measurements. Any device antenna may provide measurements to a machine learning model that determines a region in which the mobile device resides, based on training measurements in the regions.

Abstract: A light emitting multi fan device may include a mount rack, fan frame, light guide plate, plurality of fans, and plurality of fixing assemblies. The plurality of fans is rotatably coupled to a rack frame of the mount rack. The fan frame is coupled to the mount rack and respectively surrounds each plurality of fans. The light guide plate is coupled to the fan frame and the rack frame. Each plurality of fixing assemblies includes a locking element and a receiving through hole. The locking element protrudes from the fan frame and the receiving through hole extends through the rack frame. The plurality of fixing assemblies is configured to enable the fan frame to lock the light guide plate between the fan frame and the rack frame via a pushing force.

Abstract: Some aspects of the disclosure provide a method of video decoding. The method includes: receiving a bitstream that comprises coded information of one or more pictures; generating, according to the bitstream, at least a to-be-filtered sample, and input samples for filtering the to-be-filtered sample in an in-loop filter, the in-loop filter using a Wiener-based filter with an adaptive filter shape; determining a modified filter shape for the Wiener-based filter, the modified filter shape being adapted according to a relationship between the to-be-filtered sample and the input samples; and applying the Wiener-based filter with the modified filter shape on the input samples to generate a filtered output of the to-be-filtered sample.

Abstract: A display substrate includes a base substrate, a first drive module, a second drive module, an array of sub-pixel circuits, rows of gate lines, and columns of data lines. A portion of sub-pixel circuits having the same color in the same row are electrically connected to one row of the gate line, another portion of sub-pixel circuits having the same color in the same row are electrically connected to another row of the gate line. The first drive module is electrically connected to a first end of the row of gate line and the second drive module is electrically connected to a second end of the another row of gate line. The first end and the second end are opposite ends. In the sub-pixel circuits located in the same row, at least two sub-pixel circuits at the same side of the data line are electrically connected to the data line.

Abstract: A coal and gas outburst monitoring device includes the insertion and anchoring assembly, and the pump drainage and monitoring mechanism; the insertion and anchoring assembly is vertically inserted and distributed on the sidewall of surrounding rock of coal mine roadway, and the insertion and anchoring assembly can monitor the stress change data in the sidewall of surrounding rock in real time; the pump drainage and monitoring mechanism is erected within the coal mine roadway, and the pump drainage and monitoring mechanism can cooperate with the insertion and anchoring assembly to perform the gas pump drainage monitoring for the sidewall of surrounding rock of goaf, and to obtain the gas seepage monitoring data in the surface layer and the inner layer of sidewall of surrounding rock. Thus, comparing with the database mechanism, the accurate and advanced predictions for the gas outburst can be made.

Abstract: Provided are a cooking device, a control method and apparatus thereof, and a computer-readable storage medium. The cooking device includes an air frying module and a microwave module. The method includes: obtaining a characteristic parameter of a food material and a cooking stage of the cooking device; determining a cooking parameter of the cooking device based on the characteristic parameter of the food material; and controlling the air frying module or the microwave module based on the cooking stage and the cooking parameter to accelerate cooking of the food material.

Abstract: Disclosed are a method, an apparatus, and an electronic device for determining a heart valve based on multiple planes. The method includes steps of: determining a plurality of target planes in a heart based on an anatomical image; determining at least one first initial pushing point located on an inner contour line of a heart valve leaflet in each target plane; determining at least one first pushing reach point corresponding to the at least one first initial pushing point; determining at least one first pushing range of each target plane based on the at least one first pushing reach point; determining a second pushing range of the heart valve based on the at least one first pushing range; and determining an artificial heart valve that matches the heart valve based on the second pushing range.

Abstract: The present disclosure provides an arcing detection device. The arcing detection device may include a detection coil and a processing circuit operably connected to the detection coil. The detection coil may be configured to detect a current variation of a system. The processing circuit may be configured to determine information of an arcing event of the system based on the current variation of the system. The information of the arcing event of the system may include a position where the arcing event occurs in the system.

Abstract: A small integrated free space circulator, comprising a first polarizing beam splitter (1), a half-wave plate (2), a Faraday rotating plate (3), a beam splitter (4), a quarter-wave plate (5), and a pair of reflective plates (6, 7), wherein the first polarizing beam splitter (1), the half-wave plate (2), the Faraday rotating plate (3), and the beam splitter (4) are sequentially arranged, the quarter-wave plate (5) and the reflective plate (6) are sequentially attached to a side surface of the first polarizing beam splitter (1) adjacent to the half-wave plate (2), and the reflective plate (7) is arranged on a side surface of the beam splitter (4, 8) adjacent to or opposite to the Faraday rotating plate (3); when the reflective plate (7) is arranged on the side surface of the beam splitter (8) opposite to the Faraday rotating plate (3), the reflective plate (7) partially covers the side surface of the beam splitter (8) opposite to the Faraday rotating plate (3).