Abstract: A switching power supply circuit includes a power transistor circuit, including a plurality of power transistors coupled in series between a power supply end and a ground, where a first electrode of a first power transistor in the plurality of power transistors is coupled to the power supply end by using a second power transistor in the plurality of power transistors, and a second electrode of the first power transistor is coupled to the ground by using a third power transistor in the plurality of power transistors; a drive circuit, configured to drive the second power transistor and the third power transistor; and a first transistor, where both a gate and a first electrode of the first transistor are coupled to a gate of the third power transistor, and a second electrode of the first transistor is coupled to the ground by using a first switch.

Abstract: In a voltage conversion circuit, a sampling signal and a triangular wave signal are synthesized into a first signal, and the first signal and a second signal are compared to output a pulse-width modulation (PWM) signal. A frequency of the PWM signal may be determined by a frequency of the triangular wave signal. Therefore, the frequency of the PWM signal is fixed using the frequency-fixed triangular wave signal. Turning on or switching off of a power transistor in a voltage conversion subcircuit is controlled according to the PWM signal to convert a received direct current input voltage into a direct current output voltage, thereby implementing a fixed operating frequency for the voltage conversion circuit.

Abstract: In a data processing method for node localization in wireless sensor networks, a plurality of potential coordinate calculation values for a to-be-located node are calculated based on RSSI data received by the to-be-located node from a plurality of anchor nodes. A centroid C1 of these coordinate calculation values is calculated. Then coordinate calculation values with distances to the centroid C1 less than a threshold are screened out, and a centroid C2 of the screened-out coordinate calculation values is calculated. A coordinate position of the centroid C2 is used as the position of the to-be-located node. In other words, a plurality of potential positions for the to-be-located node are calculated using multiple groups of RSSI data and these potential positions are then screened through calculation. Instead of directly processing the received RSSI data, the present disclosure processes the coordinate calculation values obtained based on the received RSSI data.

Abstract: Embodiment of the present disclosure provides a method for obstacle avoidance of a surgical robot. The method may include: collecting first data through a first acquisition device, wherein the first data is image data of a space in which a target subject is located; constructing a safety zone for the target subject based on the first data; collecting second data outside the safety zone through a second acquisition device, wherein the second data is image data of the target subject; and constructing a three-dimensional model of the target subject based on the second data, wherein the three-dimensional model of the target subject may be used for obstacle avoidance detection during an operation of the surgical robot.

Abstract: The invention discloses a blockchain-based intrusion detection system for railway signal, which is built on a blockchain's distributed chain structure, without a central, trusted control center. This design mitigates the vulnerabilities associated with centralized intrusion detection centers. Additionally, by utilizing a blockchain-based distributed structure, it also eliminates the risk of a single point of failure for the intrusion detection center. Moreover, the data within the blockchain-based intrusion detection system is highly resistant to malicious tampering. This is achieved by leveraging the consensus mechanism inherent in the blockchain, which can achieve consensus among intrusion detection nodes. The current invention solves the internal evil attacks and avoid the inability to reach consensus between nodes due to internal evil, thereby affecting the intrusion detection performance; at the same time, the intrusion detection model can resist external network attacks.

Abstract: A tunneling system includes a bolter miner, a bolter-integrated transportation machine, a transfer machine, a self-moving tail and a belt conveyor. The bolter miner includes a rack, a cutting device, and a bolt support device. The bolt support device includes a lifting assembly, a work platform, a first drilling frame assembly and a stabilizing assembly. The lifting assembly is arranged between the rack and the work platform. The first drilling frame assembly and the stabilizing assembly are arranged on the work platform. The bolter-integrated transportation machine is arranged behind the bolter miner and configured to transfer coal rock cut and conveyed by the bolter miner. One end of the transfer machine is connected with the bolter-integrated transportation machine, and the other end of the transfer machine is lapped with the self-moving tail. The belt conveyor is arranged behind the self-moving tail.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device comprises a cathode, an anode, and an emissive layer disposed between the cathode and the anode, wherein the emissive layer comprises at least a first host compound, a second host compound, and a first metal complex. A capacitance property of the organic electroluminescent device satisfies the following condition: at 500 Hz, a maximum capacitance value of the organic electroluminescent device is Cmax, and Cmax?Cmax0??0.20 nF, wherein Cmax0 denotes a maximum capacitance value of an organic electroluminescent device A at 500 Hz. The organic electroluminescent device can greatly reduce device capacitance, which is conducive to improving a response rate of the device at a low grayscale and increasing a refresh rate of the device, and further improve device efficiency. Further provided is a display assembly comprising the organic electroluminescent device.

Abstract: A tunnel tunneling system includes a bolter miner, a bolter-integrated transportation machine, a transfer machine, a self-moving tail and a belt conveyor. The bolter miner includes a rack, a cutting device, a drilling device and a control device. The cutting device is arranged on the rack and is swingable in an up-down direction, and has a lowest swing angle and a highest swing angle. The drilling device is arranged on the rack, and includes a drilling rig and a sensor. The drilling rig is configured to drill a tunnel floor and/or a tunnel roof, and the sensor is configured to monitor a set parameter of the drilling rig and generate a monitoring data signal when the drilling rig is drilling. The control device is configured to receive and analyze the monitoring data signal.

Abstract: The present disclosure provides a collision prediction system and method. The method may include obtaining a target model of a target device. The method may also include determining first posture information of the target model and second posture information of an operating apparatus, wherein the target device is set on an end of the operating apparatus. The method may further include generating a collision prediction between the target model and the operating apparatus based on the first posture information and the second posture information, the collision prediction indicating whether there is a space accommodating the target device during an operation of the operating apparatus.

Abstract: A hand-eye calibration method, apparatus, system, and storage medium for a robot are provided. The method includes: obtaining images of a target body of a calibration target acquired by an imaging device when the robot (110) is in different poses; for any pose, determining, based on at least one image collected in the pose, a first transformation relationship between a first coordinate system of the calibration target and a second coordinate system of the imaging device in the pose; obtaining a second transformation relationship between a third coordinate system and a fourth coordinate system of the robot (110); and determining, based on the first transformation relationships and the second transformation relationships corresponding to the different poses, a third transformation relationship between the second coordinate system and one of the third coordinate system and the fourth coordinate system. Further provided is a calibration target.

Abstract: The present disclosure relates to a surgical robot and a method of controlling the surgical robot. The method may include obtaining pose information of an end tool and providing first feedback information to an operator based on the pose information.

Abstract: This application provides a surgical robot control method, a computer device, and a surgical robot system. The surgical robot control method includes: receiving a user demand, and generating an interactive control command; generating a motion control command according to the interactive control command; and controlling a terminal of a mechanical arm to perform the motion control command. The motion control command includes controlling the terminal of the mechanical arm to act in accordance with a plurality of motion modes. The surgical robot control method may control the terminal of the mechanical arm to act in accordance with the plurality of motion modes through the motion control command, realize different motion schemes in various clinical application scenarios, and realize controlling the terminal of the mechanical arm to be flexibly switched between the plurality of motion modes in any application scenario through the interactive control command.

Abstract: The present disclosure discloses example DC-DC converters. One example DC-DC converter includes a first capacitor, a second capacitor, a switched capacitor SC circuit, and an inductor circuit. An input end of the SC circuit is coupled to a voltage input end, and an output end of the SC circuit is coupled to a voltage output end. The first capacitor and the second capacitor are sequentially connected in series between the voltage input end and the voltage output end. One end of the inductor circuit is selectively coupled between the first capacitor and the second capacitor or to a ground end, and the other end of the inductor circuit is coupled to the voltage output end.

Abstract: Efficient writing to lower-performance storage tiers of a multi-tier storage system evaluates user intention when determining a write process that ultimately writes target data to a priority storage tier according to the user intention. Temporary high-performance storage tiers serve as coordinator tiers to achieve the efficient writing process for writing substantial or massive datasets to local storage.

Abstract: Efficient writing to lower-performance storage tiers of a multi-tier storage system evaluates user intention when determining a write process that ultimately writes target data to a priority storage tier according to the user intention. Temporary high-performance storage tiers serve as coordinator tiers to achieve the efficient writing process for writing substantial or massive datasets to local storage.

Abstract: An actuation assembly of an auto-injector is used for combining a container assembly with a vial. The actuation assembly of the auto-injector includes: an actuation sleeve, an execution sleeve, a first resilient element, a rear cap, a push rod, and a second resilient element. The actuation assembly as a whole corresponds to one axis. The actuation sleeve is designed with two symmetrical cantilevers of the execution sleeve and corresponding parts, which is used not only to control the movement of the push rod before and after the actuation sleeve is actuated, but also to provide an audible sound to alert the assembly in place and the end of automatic injection. Accordingly, when the actuation sleeve is actuated, the push rod can be moved toward the vial to accomplish the effect of automatic injection.

Abstract: A method includes obtaining a channel impulse response (CIR) based on multiple ultrawide band (UWB) measurements between a mobile device and a target object. The method also includes estimating a first distance between the mobile device and the target object based on an energy of the CIR. The method also includes estimating a second distance between the mobile device and the target object based on a phase of the CIR. The method also includes obtaining an estimated distance between the mobile device and the target object based on at least one of the first distance and the second distance.

Abstract: A computer-implemented method according to one embodiment includes identifying a request to migrate data associated with a volume from a first storage pool to a second storage pool; identifying entries in a first table corresponding to rank extents in the first storage pool containing the data; allocating and synchronizing a plurality of second tables for the identified entries of the first table that are located in the volume; transferring the data associated with the volume from the rank extents in the first storage pool containing the data to one or more rank extents in the one or more ranks of the second storage pool; and updating the second tables to correspond to the transferred data in the one or more rank extents in the one or more ranks of the second storage pool.

Abstract: A computer-implemented method according to one embodiment includes identifying a request to migrate data associated with a volume from a source storage pool having a first rank extent size to a destination storage pool having a second rank extent size smaller than the first rank extent size, creating a correspondence between logical volume extents of the volume and physical offset locations within rank extents of the source storage pool, and migrating data from one or more ranks of the source storage pool to one or more ranks of the destination storage pool, utilizing the correspondence between the logical volume extents of the volume and the physical offset locations within the rank extents of the source storage pool.

Abstract: A computer-implemented method according to one embodiment includes identifying a request to migrate data associated with a volume from a first storage pool to a second storage pool; identifying entries in a first table corresponding to rank extents in the first storage pool containing the data; allocating and synchronizing a plurality of second tables for the identified entries of the first table that are located in the volume; transferring the data associated with the volume from the rank extents in the first storage pool containing the data to one or more rank extents in the one or more ranks of the second storage pool; and updating the second tables to correspond to the transferred data in the one or more rank extents in the one or more ranks of the second storage pool.