Abstract: An acoustic resonator includes a piezoelectric stack including a piezoelectric layer having a top surface and a bottom surface, a top electrode layer disposed above the top surface, and a bottom electrode layer disposed below the bottom surface. A number of acoustic wave reflectors are disposed on a side of the bottom electrode layer opposite the piezoelectric layer. Each acoustic wave reflector includes a high acoustic impedance layer and may include a low acoustic impedance layer. The acoustic resonator may include a tether that extends laterally to a stacking direction of the layers of the piezoelectric stack. A supporting structure may be coupled to the tether opposite the acoustic resonator for anchoring the acoustic resonator. A mirror, one or more phononic crystals, or both may be positioned on proximate the tether opposite the acoustic resonator to avoid resonant waves from exiting the acoustic resonator in use.

Abstract: Disclosed is a board-writing extraction method and a related device. The board writing extraction method includes: obtaining a target object segmentation image of a writing-board image, wherein a contrast ratio between a target object and a non-target object in the target object segmentation image reaches a predetermined contrast ratio; converting, according to the target object segmentation image, a grayscale image of the writing-board image into a to-be-processed grayscale image with the board writing being highlighted; and performing binarization processing on the to-be-processed grayscale image to obtain a board-writing image of the writing-board image. The present disclosure can effectively reduce the noise in the board-writing image extracted from the writing-board image.

Abstract: The present disclosure provides a processing method for board writing display and related devices, wherein the processing method includes: acquiring a board writing image to be displayed, wherein the board writing image to be displayed is a board writing image with complete board writing data extracted from an image frame of a video; overlaying the board writing image to be displayed to a writing board area of the image frame according to a display parameter set by a user and generating an image to be displayed based on an overlaid image; replacing the image frame with the image to be displayed for displaying. The present disclosure makes display mode of board writing may be controlled, and is comparatively intelligent.

Abstract: Disclosed is a processing method for board-writing display and a related apparatus. The processing method includes: outputting a composited image frame of a current frame according to the current frame and a complete board-writing image most recently outputted by an extraction module transmitted by a first thread; transmitting, in a case that the extraction module is in an idle state, a previous frame and the current frame to the extraction module by a second thread, to output a complete board-writing image again; determining, in a case that the current frame is not a last frame, a next frame of the current frame as a next current frame by the first thread, and returning to perform above steps. Thus, technical problem of poor real-time video processing performance is solved, effectively avoiding video stuttering in an application which performs video processing while playing a video.

Abstract: Disclosed is a processing device, a system, a method for board writing display. The processing device comprises: an extraction unit to extract a first board-writing image from a first image frame in a video and a second board-writing image from a second image frame in the video; a supplement unit to determine an occlusion area of the second board-writing image based on a target object segmentation image of the second image frame, and replace the occlusion area of the second board-writing image with a corresponding area of the first board-writing image to obtain a third board-writing image; an output unit to generate an output image frame based on the second image frame and the third board-writing image, the output image frame presents an image with a target object located behind a transparentized board writing content. The present disclosure enables the board-writing data in the video to be presented completely.

Abstract: A video processing method and related devices are provided. The method includes: acquiring board writing images of consecutive frames from a video with unobstructed board writing; calculating a difference area between the image of a current frame and a reference image; replacing a corresponding image block in the board writing image of the current frame with a corresponding image block in the reference image to obtain a new board writing image for each of the difference area; outputting the new board writing image to form a new video. The board writing image of the current frame are sequentially each board writing image after the board writing image of a first frame in the board writing images of the consecutive frames, and the reference image is the board writing image associated with a previous board writing image.

Abstract: Disclosed is a target object segmentation method and a related device, the target object segmentation method comprises: obtaining an input image containing a target object in a video; inputting the input image to a preset target object segmentation model, outputting a first target object segmentation image after segmentation is performed by the target object segmentation model; performing a target object contour segmentation on the input image to obtain a second target object segmentation image; performing a mergence operation on corresponding pixels in the first target object segmentation image and the second target object segmentation image to obtain a final target object segmentation image. If one of the corresponding pixels is a target object pixel, the target object pixel is presented as a pixel located at a corresponding position in the final target object segmentation image after the mergence operation is performed. Target object segmentation accuracy is improved.

Abstract: Processes and device configurations are provided for generating and using flexible storage codes. Methods and configurations described herein can reconstruct and recover data from a distributed network in the event of one or more failures or erasures. According to embodiments, a method includes determining the number of nodes and number of symbols of a flexible storage code, and reconstructing the information using the flexible storage code and determined numbers of nodes and symbols. The flexible storage code may be configured for a flexible number of nodes and symbols for information to use a subarray of symbols and nodes of a storage code array for information. Flexible storage codes may provide a framework for a reconstruction configuration using one or more of a flexible locally recoverable code (LRC), flexible partial maximum distance separable code (PMDSC), and flexible minimum storage regenerating code (MSRC).

Abstract: An acoustic resonator includes a piezoelectric stack including a piezoelectric layer having a top surface and a bottom surface, a top electrode layer disposed above the top surface, and a bottom electrode layer disposed below the bottom surface. A number of acoustic wave reflectors are disposed on a side of the bottom electrode layer opposite the piezoelectric layer. Each acoustic wave reflector includes a high acoustic impedance layer and may include a low acoustic impedance layer. The acoustic resonator may include a tether that extends laterally to a stacking direction of the layers of the piezoelectric stack. A supporting structure may be coupled to the tether opposite the acoustic resonator for anchoring the acoustic resonator. A mirror, one or more phononic crystals, or both may be positioned on proximate the tether opposite the acoustic resonator to avoid resonant waves from exiting the acoustic resonator in use.

Abstract: Methods and devices are provided for error correction of distributed data in distributed systems using Reed-Solomon codes. In one embodiment, processes are provided for error correction that include receiving a first correction code for data fragments stored in storage nodes, constructing a second correction code responsive to an unavailable storage node of the storage nodes, performing erasure repair of the unavailable storage node, and outputting a corrected data fragment. The first correction code is a Reed-Solomon code represented as a polynomial and the second correction code is represented as a second polynomial with an increased subpacketization size. Processes are configured to account for repair bandwidth and sub-packetization size. Code constructions and repair schemes accommodate different sizes of evaluation points and provide a flexible tradeoff between the subpacketization size repair bandwidth of codes.

Abstract: An acoustic resonator includes a piezoelectric stack including a piezoelectric layer having a top surface and a bottom surface, a top electrode layer disposed above the top surface, and a bottom electrode layer disposed below the bottom surface. A number of acoustic wave reflectors are disposed on a side of the bottom electrode layer opposite the piezoelectric layer. Each acoustic wave reflector includes a high acoustic impedance layer and may include a low acoustic impedance layer. The acoustic resonator may include a tether that extends laterally to a stacking direction of the layers of the piezoelectric stack. A supporting structure may be coupled to the tether opposite the acoustic resonator for anchoring the acoustic resonator. A mirror, one or more phononic crystals, or both may be positioned on proximate the tether opposite the acoustic resonator to avoid resonant waves from exiting the acoustic resonator in use.

Abstract: Methods and devices are provided for error correction of distributed data in distributed systems using Reed-Solomon codes. In one embodiment, processes are provided for error correction that include receiving a first correction code for data fragments stored in storage nodes, constructing a second correction code responsive to an unavailable storage node of the storage nodes, performing erasure repair of the unavailable storage node, and outputting a corrected data fragment. The first correction code is a Reed-Solomon code represented as a polynomial and the second correction code is represented as a second polynomial with an increased subpacketization size. Processes are configured to account for repair bandwidth and sub-packetization size. Code constructions and repair schemes accommodate different sizes of evaluation points and provide a flexible tradeoff between the subpacketization size repair bandwidth of codes.

Abstract: A densely-spaced wavelength division multiplexing (DWDM) transceiver utilizes a comb laser source to provide a multi-channel system capable of supporting at least twenty separate channels. The optical transmitter portion of the transceiver utilizes a double-pass (e.g., reflective) modulator configuration. The double-pass arrangement allows for a single grating (or other suitable dispersive element) to be used as a demultiplexer in combination with the comb laser source to separate the input optical beams into individual wavelength components, as well as a multiplexer for combining the plurality of separate modulated optical signals into a single, multi-channel DWDM optical output signal. The optical receiver portion of the transceiver includes a grating element to direct the multi-channel received optical signal into separate, wavelength-based channels, with the signal propagating along each channel directed into a separate photodiode.

Abstract: The present invention provides a method and apparatus for restricting batch requests for a service, facilitating restriction on requesting the service in batch and contributing to overcome some deficiencies in the prior art. The method comprises: receiving, by a server, service request information sent by a terminal (S11); sending, by the server, a calculation problem to the terminal, the question requiring a larger amount of computing recourses of the terminal than that of the server (S12); receiving, by the server, a calculation result of the calculation question from the terminal (S13), and verifying the calculation result (S14), and if the calculation result is correct, providing the service to the terminal (S15), otherwise, rejecting to provide the service to the terminal (S16).

Abstract: An acoustic resonator includes a piezoelectric stack including a piezoelectric layer having a top surface and a bottom surface, a top electrode layer disposed above the top surface, and a bottom electrode layer disposed below the bottom surface. A number of acoustic wave reflectors are disposed on a side of the bottom electrode layer opposite the piezoelectric layer. Each acoustic wave reflector includes a high acoustic impedance layer and may include a low acoustic impedance layer. The acoustic resonator may include a tether that extends laterally to a stacking direction of the layers of the piezoelectric stack. A supporting structure may be coupled to the tether opposite the acoustic resonator for anchoring the acoustic resonator. A mirror, one or more phononic crystals, or both may be positioned on proximate the tether opposite the acoustic resonator to avoid resonant waves from exiting the acoustic resonator in use.

Abstract: The present invention provides a method and apparatus for restricting batch requests for a service, facilitating restriction on requesting the service in batch and contributing to overcome some deficiencies in the prior art. The method comprises: receiving, by a server, service request information sent by a terminal (S11); sending, by the server, a calculation problem to the terminal, the question requiring a larger amount of computing recourses of the terminal than that of the server (S12); receiving, by the server, a calculation result of the calculation question from the terminal (S13), and verifying the calculation result (S14), and if the calculation result is correct, providing the service to the terminal (S15), otherwise, rejecting to provide the service to the terminal (S16).

Abstract: An alignment method for optical axes of a composite waveplate includes rotating a rotatable waveplate, which rotates about a central axis with respect to a fixed waveplate, and adjusting the rotation angle thereof until the differences between the spectral parameters of the composite waveplate and ideal spectral parameters are smaller than preset values.

Abstract: An alignment method for optical axes of a composite waveplate includes rotating a rotatable waveplate, which rotates about a central axis with respect to a fixed waveplate, and adjusting the rotation angle thereof until the differences between the spectral parameters of the composite waveplate and ideal spectral parameters are smaller than preset values.

Abstract: A MESFET has a conduction channel provided with a first doping profile in a first portion which extends between the source and the gate, and a second doping profile in a second portion which extends between the gate and the drain. A background p-type region is provided beneath the first portion, but not necessarily behind the second portion.

Abstract: A MESFET has a conduction channel provided with a first doping profile in a first portion which extends between the source and the gate, and a second doping profile in a second portion which extends between the gate and the drain. A background p-type region is provided beneath the first portion, but not necessarily behind the second portion.