Abstract: The operating method of a server for providing a metaverse in which a call between user terminals may be performed may include: generating a first avatar based on profile information of a first user terminal and a second avatar based on profile information of a second user terminal; providing a map space in which the first avatar and the second avatar are able to travel; mediating a call between the first user terminal and the second user terminal based on whether a plurality of avatars including the first avatar and the second avatar have entered a first audio space included in the map space; and completing matching between the first user terminal and the second user terminal when a first sign of attraction to the second avatar is transmitted from the first user terminal and a sign of attraction to the first avatar is transmitted from the second user terminal.

Abstract: This application discloses a fault recovery plan determining method, apparatus, and system, and a computer storage medium, and belongs to the field of network technologies. First, a control device obtains a similar known fault that is in a plurality of known faults and whose fault root cause and a fault root cause of a target fault in a network meet a similarity condition. Then, the control device obtains a fault recovery plan corresponding to the similar known fault. The control device determines, based on the fault recovery plan corresponding to the similar known fault, a fault recovery plan corresponding to the target fault.

Abstract: A control method and circuit for two-stage current limiting of peak power current are disclosed. The method includes detecting a load current of a power supply system; judging a load current interval of the power supply system; when the load current of the power supply system is less than the rated power current, enabling the system to work in a constant voltage mode; and when the load current of the power supply system is greater than the rated power current, enabling the system to work in a peak power mode; and when the load current of the power supply system is greater than the peak power current, starting a protection program.

Abstract: Provided is a quad-core radio-frequency coil circuit. The quad-core radio-frequency coil circuit includes a coil module (1) and a front-end module (2). The coil module (1) is configured to receive a nuclear magnetic test signal and, according to the nuclear magnetic test signal, generate an induction signal. The front-end module (2) is connected to the coil module (1) and configured to generate the nuclear magnetic test signal and collect the induction signal.

Abstract: a transmission device and the fabricating method therefor, a quantum device integration component and a quantum computer, and belongs to the field of quantum information. The transmission device includes: a substrate; a micro-strip line layer formed on the substrate; a dielectric layer formed on the micro-strip line layer; and a ground layer and a port pad formed on the dielectric layer, wherein the ground layer is electrically connected to a ground plate of the micro-strip line layer, and the port pad is electrically connected to a conductor strip of the micro-strip line layer. The transmission device can be fabricated based on the existing integrated circuit fabricating process. In this transmission device, the micro-strip line layer can have a multi-layer stacking arrangement, so that high-density wiring on the substrate with a limited area can be achieved to adapt to the packaging needs of large-scale quantum chips.

Abstract: Systems and methods for performing multispectral intra-oral and other diagnostic scans of a physical object are disclosed. A handheld scanning device separately illuminates the physical object with a plurality of light sources and captures corresponding images of the physical object, which may comprise a patient's tooth, intra-oral tissue, or skin. The light sources, such as laser diodes and light-emitting diodes, use wavelengths selected for diagnostic and three-dimensional modeling efficacy, which may be based on translucence and fluorescence characteristics in objects being observed. The images, and a three-dimensional model derived therefrom potentially substantially immediately thereafter, form a diagnostic rendering that may be stored, presented, and analyzed to design and evaluate medical treatment plans.

Abstract: Systems and methods for performing multispectral quality control inspection scans of a physical object are disclosed. A handheld scanning device separately illuminates a physical object with a plurality of light sources and captures corresponding images of the physical object. The physical object may comprise an article of manufacture. The light sources, such as laser diodes and light-emitting diodes, use wavelengths selected for investigative and three-dimensional modeling efficacy, which may be based on translucence and fluorescence characteristics in objects being observed. The images, and a three-dimensional model derived therefrom potentially substantially immediately thereafter, form an investigative rendering that may be stored, presented, and analyzed to identify discrepancies to be further examined. Additional images, such as x-ray images obtained from other instruments, may be added to the rendering, to help more completely determine if the physical object meets particular specifications.

Abstract: An example method of managing guest time for a virtual machine (VM) supported by a hypervisor of a virtualized host computer includes: configuring, by the hypervisor, a central processing unit (CPU) of the host computer to trap, to the hypervisor, access by guest code in the VM to a physical counter and timer of the CPU; configuring, by the hypervisor, the guest code in the VM to use the physical counter and timer of the CPU rather than a virtual counter and timer of the CPU; trapping, at the hypervisor, an access to the physical counter and timer by the guest code; and executing, by the hypervisor, the access to the physical counter and timer on behalf of the guest code while compensating for an adjustment of a system count of the physical counter and timer to maintain the guest time as scaled with respect to frequency of the physical counter and timer.

Abstract: A wireless power system can include a wireless power transmitter and a wireless power receiver. The transmitter can include a transmit coil, an inverter, and inverter control circuitry that can operate one or more switching devices of the inverter to communicate information to the receiver by controlling a delay between receipt of the burst request pulse and initiating operation of the inverter and/or controlling a polarity of a first pulse of the inverter. The receiver can include a receive coil magnetically coupled to the transmit coil, a rectifier, and rectifier control circuitry that initiates a burst request pulse to initiate operation of a transmitter. The rectifier control circuitry can operate one or more switching devices of the rectifier to communicate information to the transmitter by at least one of short circuiting an LC tank including the receive coil or controlling a polarity of the burst request pulse.

Abstract: A multichannel endorectal coil for prostate MRI, a system, and a working method. The coil comprises a support body provided with a winding curved surface, a plurality of first endorectal coils (1, 2, 3) wrapped around the surface of the support body, and a second endorectal coil stacked on the plurality of first endorectal coils (1, 2, 3); wherein two adjacent first endorectal coils (1, 2, 3) are decoupled by means of partial overlapping, and two non-adjacent first endorectal coils (1, 2, 3) are decoupled by providing a shared capacitor (5); the second endorectal coil comprises a first coil section and a second coil section which are in intersecting connection with one another, the first coil section and the second coil section are arranged symmetrically, and no electrical connection exists at the intersection thereof. The invention increases the number of channels, and further achieves better high-resolution imaging capabilities.

Abstract: The invention relates to a directional coupler, coupling high power and low power is used to replace existing two high-power directional couplers, thus reducing the cost and reducing the insertion loss of high-power radio frequency channels. The directional coupler cooperates with a control conditioning board, a splitter, a multi-path radio frequency power amplifier and a combiner to form the radio frequency power amplifier system, and the system is connected to a spectrometer; on one hand, by using a standard signal output by the spectrometer and a feedback signal of the directional coupler, nonlinearity caused by the power amplifier is corrected to achieve magnet-free linear radio frequency power amplification and anomaly protection; and on the other hand, the spectrometer can be used for monitoring the output power of the directional coupler and monitoring antenna matching, so as to provide dual protection for the radio frequency power amplifier system.

Abstract: A wireless power transmitter can include a coil, an inverter coupled to the coil, and control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates inverter operation, driving the coil and powering the receiver. The control circuitry can operate inverter switches so bandwidth of the wireless power transfer signal falls within a specified range by: (a) extending a minimum on time of the switches, (b) modifying pulse width modulation (PWM) drive signals supplied to the switches to shape a coil current burst envelope, and/or (c) modifying PWM signal amplitude supplied to the switches. Modifying the PWM drive signals can include using a symmetrical PWM scheme in which the positive and negative pulses are symmetrical in width on a cycle-by-cycle basis or using a complementary PWM scheme in which the positive and negative pulse widths are complementary on a cycle-by-cycle basis.

Abstract: The present disclosure discloses a control method and circuit for two-stage current limiting of peak power current, and relates to the technical field of switching power supply control. The control method for two-stage current limiting of peak power current includes the following steps: step 1, detecting a load current of a power supply system; step 2, judging a load current interval of the power supply system; step 3, when the load current of the power supply system is less than the rated power current, enabling the system to work in a constant voltage mode; and when the load current of the power supply system is greater than the rated power current, enabling the system to work in a peak power mode; and step 4, when the load current of the power supply system is greater than the peak power current, starting a protection program.

Abstract: The present invention provides a mutant strain of Corynebacterium glutamicum with efficient expression of exogenous proteins, which can solve the technical problem of low protein expression quantity of using Corynebacterium glutamicum as an exogenous protein expression host. The mutant strain of Corynebacterium glutamicum is deposited in the China General Microbiological Culture Collection Center (CGMCC), and the deposit number is CGMCC No. 20138. The mutant strain of Corynebacterium glutamicum in the present invention, verified by the expression of exogenous proteins, shows a significantly enhanced expression of both intracellular and secreted proteins when compared with its initial strain.

Abstract: Techniques for training models, using weakly-labeled data, to generate predictions based on medical images are disclosed. Models can be trained to perform feature localization, object detection, and/or segmentation. Weakly-labeled data can include unlabeled data or video-level labeled data. Medical imaging data is received including a first set comprising frame-level annotations and a second set comprising weakly-labeled data. A training dataset is generated comprising frame-level ground truth data, and a model is trained, using the training dataset, to generate predictions based on new medical imaging data. In some examples, the training data set may further include weakly-labeled data. In some examples, the training procedure uses a teacher model to generate frame-level localizations (pseudo-labels), which are used to train a student model whose weights can be adaptively transferred to the teacher model. Generated predictions can include frame-level feature localizations and/or video-level annotations.

Abstract: Techniques for training models, using video-level annotations as additional supervision, to generate both video-level and frame-level predictions based on medical images are disclosed. In some examples, medical imaging data is received including frame-level annotations and video-level annotations. A training dataset may be generated comprising frame-level ground truth data and video-level ground truth data, and the model is trained, using the training dataset, to generate frame-level feature localizations/segmentations and/or video-level feature predictions on new medical imaging data. In some examples, a model includes a frame-to-video feature encoder that learns to generate video-level predictions from frame-level predictions. The frame-to-video feature encoder may be jointly trained based on video-level annotations along with frame-level annotations during training.

Abstract: The present invention discloses a ?-transaminase mutant obtained through DNA synthetic shuffling combined mutation. The ?-transaminase mutant is obtained through point mutation of a wild type ?-transaminase from Aspergillus terrus. The amino acid sequence of the wild type ?-transaminase is shown in SEQ ID NO: 1. The mutation site of the ?-transaminase mutant is any one of: (1) F115L-H210N-M150C-M280C; (2) F115L-H210N; (3) F115L-H210N-E253A-I295V; (4) I77L-F115L-E133A-H210N-N245D; (5) I77L-Q97E-F115L-L118T-E253A-G292D; (6) I77L-E133A-N245D-G292D; and (7) H210N-N245D-E253A-G292D. According to the present invention, forward mutations obtained in the previous stage are randomly combined through a DNA synthetic shuffling combined mutation method.

Abstract: A hydrophobic MOF-based porous liquid carbon capture absorbent is provided and includes a sterically hindered solvent and a hydrophobic MOFs modified material dispersed in the sterically hindered solvent. A mass percent of the hydrophobic MOFs modified material in the hydrophobic MOF-based porous liquid carbon capture absorbent is 5% to 20%. The hydrophobic MOFs modified material is prepared by a method comprising following steps: dispersing an MOFs material, a surface modifier and a catalyst in an organic solvent, and mixing them evenly, followed by a standing reaction to obtain the hydrophobic MOFs modified material.

Abstract: The disclosure herein describes deploying a Virtual Secure Enclave (VSE) using a universal enclave binary and a Trusted Runtime (TR). A universal enclave binary is generated that includes a set of binaries of Instruction Set Architectures (ISAs) associated with Trusted Execution Environment (TEE) hardware backends. A TEE hardware backend is identified in association with a VSE-compatible device. A VSE that is compatible with the identified TEE hardware backend is generated on the VSE-compatible device and an ISA binary that matches the TEE hardware backend is selected from the universal enclave binary. The selected binary is linked to a runtime library of the TR and loads the linked binary into memory of the generated VSE. The execution of a trusted application is initiated in the generated VSE using a set of interfaces of the TR. The trusted application depends on the TR interfaces rather than the selected ISA binary.

Abstract: The operating method of a server for providing a metaverse in which a call between user terminals may be performed may include: generating a first avatar based on profile information of a first user terminal and a second avatar based on profile information of a second user terminal; providing a map space in which the first avatar and the second avatar are able to travel; mediating a call between the first user terminal and the second user terminal based on whether a plurality of avatars including the first avatar and the second avatar have entered a first audio space included in the map space; and completing matching between the first user terminal and the second user terminal when a first sign of attraction to the second avatar is transmitted from the first user terminal and a sign of attraction to the first avatar is transmitted from the second user terminal.