Abstract: A voltage control method includes obtaining two half-bus voltages at a direct current side of a three-level converter, overvoltage protection values of the two half-bus voltages, and a load voltage required by a load. One of the two half-bus voltages is configured to supply voltage to the load. The method further includes determining a voltage control strategy based on a relationship among the two half-bus voltages, the overvoltage protection values, and the load voltage. The voltage control strategy compensates for an output duty ratio of a switch of the three-level converter, such that the one of the two half-bus voltages is greater than or equal to the load voltage and each of the two half-bus voltages is smaller than or equal to a corresponding one of the overvoltage protection values. The method also includes performing voltage control on the two half-bus voltages based on the voltage control strategy.

Abstract: A control method includes, in response to detecting a target-type fault, determining, by a first control device managing a three-phase three-level power supply circuit, a control signal for instructing a first load to stop operating. The first load is connected to one of buses of the three-phase three-level power supply circuit, and the target-type fault is correlated with a second load connected to two of the buses of the three-phase three-level power supply circuit. The method further includes sending the control signal to a second control device via a target communication channel, to instruct the second control device to control the first load to stop operating.

Abstract: Embodiments of a device, a method, and a system for wireless local area network (WLAN) sensing are disclosed. In an embodiment, the device for WLAN sensing includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to receive a sounding Physical Layer (PHY) Protocol Data Unit (PPDU) that includes preamble training fields, and detect environmental changes using managed sensing measurements obtained from the preamble training fields included in the sounding PPDU.

Abstract: A pitch-based graphite composite material, a preparation method therefor and an application thereof are provided. The graphite is coated with pitch gel spheres, and a core-shell composite structure of pitch carbon microsphere coated graphite is obtained through pyrolysis and carbonization, so that the contact between a graphite surface and an electrolyte can be effectively reduced, a stable SEI film can be generated, and the SEI film has good rate and cycle performance. In addition, a porous structure formed by gas generated by pyrolysis and carbonization is beneficial to the transportation of lithium ions, the conductivity and reversible capacity of the material can be significantly improved, the material is more stable in the charging and discharging processes of the lithium-ion battery, the risks of stripping and cracking are effectively reduced, and the cycle stability and the rate capability of the battery are improved.

Abstract: Various embodiments relate to a first wireless device configured to establish sensing with a second wireless device, including: a transmitter configured to: transmit a null data packet announcement (NDPA) frame to the second wireless device configured to include an indication that the NDPA frame is a sensing NDPA frame; transmit a null data packet (NDP) frame to the second wireless device; a receiver configured to: receive a frame from the second wireless device indicating sensing information.

Abstract: Embodiments of a device, a method, and a system for periodic wireless local area network (WLAN) sensing are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to negotiate parameters for performing periodic sensing measurements, and implement the negotiated parameters when performing the periodic sensing measurements.

Abstract: A data classification and recognition method includes: obtaining a first data set and a second data set, the second data set including second data, samples in the second data being labeled; performing training using first data in an unsupervised training mode and using the second data in a supervised training mode to obtain a first classification model; obtaining a second classification model; performing distillation training on a model parameter of the second classification model to obtain a data classification model; and performing class prediction on target data by using the data classification model.

Abstract: A computer device performs feature extraction on two-dimensional medical images included in a three-dimensional medical image, to obtain image features corresponding to the two-dimensional medical images. The three-dimensional medical image are obtained by continuously scanning a target tissue structure. The computer device determines offsets of the two-dimensional medical images in a target direction based on the image features. The computer device performs feature alignment on the image features based on the offsets, to obtain aligned image features. The computer device performs three-dimensional segmentation on the three-dimensional medical image based on the aligned image features, to obtain three-dimensional layer distribution of the target tissue structure in the three-dimensional medical image.

Abstract: A data processing method includes: acquiring an initial sample angiography image set; performing data expansion processing on a first sample angiography image based on physical characteristics of blood vessels at a target site to obtain a processed sample angiography image, performing label conversion processing on a first label based on the physical characteristics of the blood vessels at the target site to obtain a second label of the processed sample angiography image, and adding the processed sample angiography image and the second label to a target sample angiography image set; and training an angiography image recognition model using the initial sample angiography image set and the target sample angiography image set to obtain a trained angiography image recognition model. The performance of the trained angiography image recognition model is improved by increasing the number of samples.

Abstract: A device, a system, and a method for power spectrum density (PSD) limited transmissions are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to generate a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) that includes a base modulation frequency unit, where the base modulation frequency unit is duplicated to unpunctured subchannels of the PPDU with a phase rotation, and transmit the PPDU in accordance with a power spectrum density (PSD) limit.

Abstract: Provided are a three-phase power conversion circuit for a household electrical appliance, a household electrical appliance, and a power-on control method for a household electrical appliance. The three-phase power conversion circuit includes a three-level active PFC unit, at least two power-on units, and a control unit. The three-phase power, subsequent to being converted by the three-level active PFC unit, obtains a first DC power and a second DC power to supply power to corresponding loads. The power-on unit is arranged at input terminals of the three-level active PFC unit to buffer a device in the three-level active PFC unit when the three-level active PFC unit is powered on. A first controllable switch module and a second controllable switch module in the power-on unit and the three-level active PFC unit are controlled by the control unit to complete buffering.

Abstract: Provided are a method for controlling a full bus load to discharge in a household electrical appliance and related apparatuses. In the method, in response to determining that a half bus load is turned on and a full bus load is turned off, a voltage difference between a first DC power and a second DC power is determined to obtain a voltage difference. The first DC power and the second DC power are obtained by converting three-phase power through a three-level active PFC unit. Subsequent to the voltage difference between the first DC power and the second DC power being determined, a full bus load is controlled to be turned on or off based on the voltage difference to stabilize a half bus voltage in a predetermined voltage interval.

Abstract: Disclosed are a super-resolution imaging system (1, 41, 51), a super-resolution imaging method, a biological sample identification system (4, 61) and method, a nucleic acid sequencing imaging system (5) and method, and a nucleic acid identification system (6) and method. The super-resolution imaging system (1, 41, 51) includes an illumination system (A) and an imaging system (B). The illumination system (A) outputs excitation light to irradiate a biological sample to generate excited light, and the imaging system (B) collects and records the excited light to generate an excited light image. The illumination system (A) includes an excitation light source (10, 10a) and a structured light generation and modulation device (11, 11a). The excitation light source (10, 10a) outputs the excitation light, and the structured light generation and modulation device (11, 11a) modulates the excitation light into structured light to irradiate the biological sample to generate the excited light.

Abstract: A gene sequencing reaction device, a gene sequencing system and a gene sequencing reaction method. The gene sequencing reaction device includes: a supporting platform; a dipping container disposed on the supporting platform, wherein the dipping container has a dipping reaction area, and the dipping reaction area is configured to hold a chemical reagent for gene sequencing reaction, so as to dip a sequencing chip having a DNA sample loading structure on the surface and having a DNA sample loaded thereon in the chemical reagent to perform a gene sequencing reaction; a temperature control apparatus, configured to control the temperature of the chemical reagent in the dipping reaction area; and a transfer apparatus, configured to insert the sequencing chip into the dipping reaction area or pull out the sequencing chip from the dipping reaction area.

Abstract: In an IEEE 802.11 wireless system, a sharing AP device (1A) shares a transmission opportunity with a shared AP device (2A) by transmitting a coordinated spatial reuse opportunity announcement control frame packet having defined signal fields which are used by the shared AP device (2A) to compute a transmit power limit for limiting interference at a first sharing STA device (1S) associated with the sharing AP device (1A) when transmitting one or more first downlink packets from the shared AP device (2A) to a first shared STA (2S) device associated with the shared AP device (2A).

Abstract: A SHP2 phosphatase allosteric inhibitor and a drug containing said inhibitor, the SHP2 phosphatase allosteric inhibitor having the structure shown in formula (I), and the use of an optical isomer compound of the SHP2 phosphatase allosteric inhibitor or a pharmaceutically acceptable salt thereof in the preparation of drugs for the treatment of tumor diseases.

Abstract: The present invention relates to the technical field of leakage protection, in particular to a leakage current detection circuit and a device thereof. The connected S1 inductive terminal and the S2 inductive terminal can be signal-connected, and the driving module detects whether the S1 inductive terminal and the S2 inductive terminal are connected by a signal. There is a connection signal to judge whether there is leakage, and the drive module turns the switch module on or off to control whether the circuit breaker generates a circuit breaker signal, and then the main switch S can be disconnected when leakage occurs to ensure the safety of electricity use. There is no need to set up a transformer. Reduced volume, simple circuit structure, and easier production.

Abstract: Disclosed are a method and system for automatic scan subject positioning in medical imaging. The method includes the following steps: acquiring scan information of a scan subject to be imaged and determining a scan subject scanning feature; identifying, on the basis of the scan subject scanning feature, a corresponding offset characteristic value from a mapping table between scanning features and offset characteristic values; and adjusting, on the basis of the corresponding offset characteristic value, a target position of the scan subject during automatic scan subject positioning.

Abstract: The present disclosure relates to image rendering methods apparatuses, and electronic devices. One example method includes obtaining, by a central processing unit (CPU), an image command stream used to render an image frame, comparing the image command stream with a previous image command stream, and, when a same drawing command exists in the two image command streams, instructing a graphics processing unit (GPU) to render the image frame based on a previously generated drawing target.

Abstract: This application provides a training method and apparatus for an image processing model, an electronic device, and a storage medium.