Abstract: Embodiments of the present disclosure relate to a method, apparatus and computer readable storage medium for positioning beam management. According to embodiments of the present disclosure, a terminal device determines signal quality and a time of arrival of a positioning reference signal received from a network device and identifies a positioning beam failure based at least in part on the determined signal quality and the time of arrival of the positioning reference signal.

Abstract: A medical communication system based on an Internet of Things is provided.

Abstract: Some embodiments of the disclosure provide a digital medical image teaching and research system. In some examples, the system includes a management side, a learning side, and a central processing unit. Both the management side and the learning side are connected to the central processing unit. In other examples, the management side includes an administrator login module, a management side control module, a teaching video module, a database, and a network connection module. The management side is configured to acquire medical image data and to generate a teaching video for scientific research personnel to perform scientific research and learning personnel to learn. The learning side includes a learning login module, a teaching video application module, and a learning side control module. The learning side is used for learning the teaching video. In further examples, a scientific research side is for the scientific research personnel to perform scientific research.

Abstract: Disclosed is a high-precision dynamic real-time 360-degree omnidirectional point cloud acquisition method based on fringe projection. The method comprises: firstly, by means of the fringe projection technology based on a stereoscopic phase unwrapping method, and with the assistance of an adaptive dynamic depth constraint mechanism, acquiring high-precision three-dimensional (3D) data of an object in real time without any additional auxiliary fringe pattern; and then, after a two-dimensional (2D) matching points optimized by the means of corresponding 3D information is rapidly acquired, by means of a two-thread parallel mechanism, carrying out coarse registration based on Simultaneous Localization and Mapping (SLAM) technology and fine registration based on Iterative Closest Point (ICP) technology.

Abstract: Provided are a continuous post-treatment method and device for a penem compound. The method includes the following steps: S1, performing continuous extraction on a reaction crude product of a penem compound, to obtain an extraction heavy phase and an extraction light phase; S2, performing continuous solid-liquid separation on the extraction heavy phase, to obtain a liquid phase separation product; S3, performing continuous pH adjustment on the liquid phase separation product until a pH value thereof is 6.1-6.3, to obtain pH-adjusted solution; and S4, performing continuous crystallization treatment on the pH-adjusted solution by a first crystallization solvent, to obtain a penem compound product. The use of the method for the post-treatment of the reaction crude product of the penem compound has the advantages of high treatment speed and high efficiency, and stable material properties and a low deterioration rate during the treatment, and has better control over the yield and purity of a target product.

Abstract: A method for a base station includes sending a request for a report on beamforming capability to a target user equipment; receiving the report on the beamforming capability from the target user equipment; allocating at least one positioning reference signal resource for use by the target user equipment based on at least the capability information included in the report; determining a beam sweeping mle based on the at least one positioning reference signal resource allocated for the target user equipment; and sending the positioning reference signal resource allocation and the beam sweeping mle to the target user equipment.

Abstract: Embodiments of the present disclosure provide apparatus, methods and computer readable storage mediums for configuring resources for positioning reference signals. In one aspect, the apparatus determines a second set of resource configuration for positioning reference signal (PRS) mapping to resource elements in the second set, which is an extension of the first set of resource configuration for PRS mapping with additional resource elements. In another aspect, another apparatus determines configurations of at least one of the first set and the second set, to configure PRS transmission according to the first set or the second set.

Abstract: An implantable amina cribrosa crossing pressure balance maintainer for constantly balancing the lamina cribrosa crossing pressure difference, an implantation device, and a method for balancing the lamina cribrosa crossing pressure difference. The lamina cribrosa crossing pressure balance maintainer is placed at the lamina cribrosa to balance the lamina cribrosa crossing pressure difference so as to enable the deformed lamina cribrosa to recover or even reverse deformation, so that the tolerance of glaucoma patients to intraocular hypertension is improved, nerve damage caused by the lamina cribrosa crossing pressure difference is relieved and reduced, and primary factors of the glaucoma optic nerve damage are eliminated. New ideas are provided for the treatment of the glaucoma in the middle and advanced periods.

Abstract: A downlink Hybrid Automatic Repeat Request (HARQ) feedback method is provided, and includes: determining whether a currently used frame structure needs to be reconfigured; determining an uplink subframe for implementing a downlink HARQ feedback corresponds to each downlink subframe according to the currently used frame structure, when no reconfiguration is needed; determining an uplink subframe for implementing the downlink HARQ feedback corresponds to each downlink subframe in a last radio frame before the reconfiguration time point, when the reconfiguration is needed, according to a first frame structure used before a reconfiguration time point and a second frame structure to be used; determining an uplink subframe for implementing the downlink HARQ feedback corresponds to each downlink subframe in a last radio frame before the reconfiguration time point; when receiving downlink data sent by a base station on any downlink subframe, sending a HARQ feedback message for the downlink data.

Abstract: A dynamic stability analysis and control method for a voltage sourced converter based high voltage direct current (VSC-HVDC) transmission system. The method includes the following steps: unlocking a converter station of the VSC-HVDC transmission system to make the VSC-HVDC transmission system run in a non-island control mode; extracting corresponding parameters of the VSC-HVDC transmission system, wherein the parameters include an effective voltage value Ut0 of an AC system, an outgoing reactive power Qvsc0 of the VSC-HVDC transmission system, a gain kp of a phase-locked loop (PLL), and a proportional integral time constant ki of the PLL; calculating a short-circuit ratio (SCR), an unit value of Ut0 and an unit value of Qvsc0; calculating a key stable component; checking the sign of the key stable component to determine the stability of the VSC-HVDC transmission system.

Abstract: An implantable lamina cribrosa crossing pressure balance maintainer for constantly balancing the lamina cribrosa crossing pressure difference, an implantation device, and a method for balancing the lamina cribrosa crossing pressure difference. The lamina cribrosa crossing pressure balance maintainer is placed at the lamina cribrosa to balance the lamina cribrosa crossing pressure difference so as to enable the deformed lamina cribrosa to recover or even reverse deformation, so that the tolerance of glaucoma patients to intraocular hypertension is improved, nerve damage caused by the lamina cribrosa crossing pressure difference is relieved and reduced, and primary factors of the glaucoma optic nerve damage are eliminated. New ideas are provided for the treatment of the glaucoma in the middle and advanced periods.

Abstract: The present disclosure provides an uplink scheduling method in an unlicensed frequency band based on a dynamic frame structure, an uplink scheduling device and a base station. Each frame structure includes uplink and downlink subframes, and same type of a subframe continuity settings, the method includes: determining whether a currently used frame structure in an unlicensed frequency band needs to be reconfigured; when reconfiguration is not required, determining an uplink subframe to be scheduled on each downlink subframe according to the currently used frame structure; when reconfiguration is required, determining an uplink subframe to be scheduled on each downlink subframe in a last radio frame before a reconfiguration time point according to a first frame structure used before the reconfiguration time point and a second frame structure to be used; transmitting a scheduling instruction for the uplink subframe to be scheduled on each downlink subframe.

Abstract: A dynamic stability analysis and control method for a voltage sourced converter based high voltage direct current (VSC-HVDC) transmission system. The method includes the following steps: unlocking a converter station of the VSC-HVDC transmission system to make the VSC-HVDC transmission system run in a non-island control mode; extracting corresponding parameters of the VSC-HVDC transmission system, wherein the parameters include an effective voltage value Ut0 of an AC system, an outgoing reactive power Qvsc0 of the VSC-HVDC transmission system, a gain kp of a phase-locked loop (PLL), and a proportional integral time constant ki of the PLL; calculating a short-circuit ratio (SCR), an unit value of Ut0 and an unit value of Qvsc0; calculating a key stable component; checking the sign of the key stable component to determine the stability of the VSC-HVDC transmission system.

Abstract: A downlink Hybrid Automatic Repeat Request (HARQ) feedback method is provided, and includes: determining whether a currently used frame structure needs to be reconfigured; determining an uplink subframe for implementing a downlink HARQ feedback corresponds to each downlink subframe according to the currently used frame structure, when no reconfiguration is needed; determining an uplink subframe for implementing the downlink HARQ feedback corresponds to each downlink subframe in a last radio frame before the reconfiguration time point, when the reconfiguration is needed, according to a first frame structure used before a reconfiguration time point and a second frame structure to be used; determining an uplink subframe for implementing the downlink HARQ feedback corresponds to each downlink subframe in a last radio frame before the reconfiguration time point; when receiving downlink data sent by a base station on any downlink subframe, sending a HARQ feedback message for the downlink data.

Abstract: The present disclosure provides an uplink scheduling method in an unlicensed frequency band based on a dynamic frame structure, an uplink scheduling device and a base station. Each frame structure includes uplink and downlink subframes, and same type of a subframe continuity settings, the method includes: determining whether a currently used frame structure in an unlicensed frequency band needs to be reconfigured; when reconfiguration is not required, determining an uplink subframe to be scheduled on each downlink subframe according to the currently used frame structure; when reconfiguration is required, determining an uplink subframe to be scheduled on each downlink subframe in a last radio frame before a reconfiguration time point according to a first frame structure used before the reconfiguration time point and a second frame structure to be used; transmitting a scheduling instruction for the uplink subframe to be scheduled on each downlink subframe.

Abstract: A switching method and system between heterogeneous networks are provided. In the switching method: a terminal sends identity information and a network access identifier to a home subscriber server (HSS) through a mobile management entity; the HSS sends the network access identifier to an access gateway, receives a seed key, sends the seed key to the terminal, calculates and sends a local key and a local identifier to an authentication, authorization and accounting (AAA) server; the terminal calculates a second handoff key and a second handoff identifier; and the AAA server sends a calculated first handoff key to an access point of the target network, for the access point and the terminal to execute a network switching operation. Communication traffic of a re-authentication process can be effectively decreased when a cellular network is switched to a WLAN, thereby decreasing time delay of re-authentication and increasing probability of success in switching.

Abstract: The present disclosure provides a protection method and device of mobile payment information, the method includes: dynamically updating, by a card manufacturer's server, replacement code information corresponding to each payment account information stored in the card manufacturer's server; each time after the card manufacturer's server updates the replacement code information corresponding to each payment account information stored in the card manufacturer's server, updating a mapping relationship between the payment account information stored in the card manufacturer's server and the replacement code information according to the updated replacement code information; sending the updated replacement code information and payment account information corresponding to the updated replacement code information to a mobile terminal, to enable the mobile terminal to perform a mobile payment using the updated replacement code information.

Abstract: A switching method and system between heterogeneous networks are provided. In the switching method: a terminal sends identity information and a network access identifier to a home subscriber server (HSS) through a mobile management entity; the HSS sends the network access identifier to an access gateway, receives a seed key, sends the seed key to the terminal, calculates and sends a local key and a local identifier to an authentication, authorization and accounting (AAA) server; the terminal calculates a second handoff key and a second handoff identifier; and the AAA server sends a calculated first handoff key to an access point of the target network, for the access point and the terminal to execute a network switching operation. Communication traffic of a re-authentication process can be effectively decreased when a cellular network is switched to a WLAN, thereby decreasing time delay of re-authentication and increasing probability of success in switching.

Abstract: A decorative tree is disclosed, and includes a base, a vertical column supported by the base and including a plurality of interconnected hollow tubes, and a power connector assembly. The power connector assembly includes a first connector terminal and a second connector terminal. The first connector terminal includes a raised step including an annular wall with a discontinuity that defines a positioning groove, and a pair of electrical contacts exposed on the annular wall. The second connector terminal includes an annular recess configured to receive the raised step, an annular ring disposed within the annular recess, and a pair of conductive terminals extending from the annular ring. Each of the conductive terminals is configured for contact with a corresponding electrical contact of the pair of electrical contacts. A positioning key extends from the annular ring and is configured for insertion into the positioning groove.