Abstract: The embodiments of the disclosure disclose a method and system for cross-chain transfer of data based on decentralized identifiers. According to the disclosure, after receiving a data transfer transaction sent by a terminal of an original holder, a source chain reads a public key of the original holder in a corresponding first BID document according to a first BID carried by the data transfer transaction, and verifies a signature carried by the data transfer transaction. After the signature passes verification, the source chain initiates a cross-chain transaction. In response to the cross-chain transaction, a target chain deploys a second BID document in the target chain, and a public key of a new holder and data to be transferred are recorded in the second BID document. Further, the source chain replaces the public key of the original holder in the first BID document with the public key of the new holder.

Abstract: A method for determining hemodynamic parameters may be provided. The method may include obtaining image data of a subject. The method may include generating a first vascular model and a second vascular model based on the image data and coupling the first vascular model with the second vascular model using an intermediate model to form a coupled vascular model. The method may also include setting at least one of a first boundary condition of the first vascular model or a second boundary condition of the second vascular model and determining a flow field distribution of the coupled vascular model based on the at least one of the first boundary condition or the second boundary condition. The method may further include determining hemodynamic parameters based on the flow field distribution.

Abstract: The present disclosure provides an RF catheter, including: a catheter body; and at least one heating unit and at least one electrode fixedly coupled to the catheter body. The at least one heating unit is configured to perform ablation on a target tissue in a superficial vein, the at least one electrode is configured to perform ablation on a target issue in a perforating vein, each of the heating unit and the electrode is in a corresponding target operating mode in accordance with an operating mode command for the RF catheter, and the target operating modes include a first operating mode where the electrode operates, a second operating mode where at least two heating units operate, and a third operating mode where merely one heating unit operates.

Abstract: The disclosure provides a method for querying data across a plurality of distributed databases. The method includes receiving a query at a local coordinator of a local database cluster. The method further includes sending the query to a remote coordinator of a remote database cluster. The method further includes retrieving, by each local segment of a plurality of local segments of the local database cluster, data responsive to the query from corresponding one or more remote segments of the remote database cluster associated with the local segment. The method further includes sending a response to the query based on the data responsive to the query from each of the corresponding one or more remote segments.

Abstract: An energy storage system is provided, which includes a structural cabinet, and a battery module and a thermal management unit mounted in the structural cabinet. The thermal management unit includes a liquid cooling unit, an air-cooling heat dissipation module, and a liquid cooling management module for managing the distribution of a cooling liquid of the liquid cooling unit. The liquid cooling unit, the air-cooling heat dissipation module, and the liquid cooling management module are separately mounted and arranged in a split manner in the structural cabinet. Compared with the conventional one-piece thermal management unit, the energy storage system is divided into three functional modules, the size of each functional module is greatly reduced.

Abstract: An energy storage system includes a structural cabinet, a battery module and a PCS module mounted in the structural cabinet, where the PCS module is arranged on top of the battery module or at an end side of the battery module, and a heat insulation layer is arranged between the PCS module and the battery module. In a practical application process of the energy storage system, since the heat insulation layer is arranged between the PCS module and the battery module, even if an electric arc in the PCS module causes a fire, under an action of the heat insulation layer, flame generated by the electric arc in the PCS module mainly spreads in a direction away from the thermal insulation layer.

Abstract: The present disclosure provides a mechanism to synchronously drive distributed speakers around a user based on localization outputs of ultra wideband (UWB) communication chips already existing in devices. Distances may be determined between a user device, such as a phone or wearable, and a plurality of distributed speakers or other devices. Based on an intersection point of such distances, the user's location can be identified. Such location can be used to modify how audio is played on each of the plurality of distributed speakers.

Abstract: Embodiments of the application provide a position estimation and prediction method for a moving object. The method includes: updating a model parameter of a position prediction model according to a position data sequence of the moving object at a current sampling moment; determining position prediction data at the current sampling moment according to the position data sequence and the position prediction model after the model parameter is updated; determining position estimation data at the current sampling moment according to the position prediction data and the position observation data at the current sampling moment; and determining position prediction data of a next sampling moment according to the position estimation data at the current sampling moment, the position data sequence and the position prediction model after the model parameter is updated, and entering an iteration operation of the next sampling moment.

Abstract: Systems and methods for image processing are provided. The systems may obtain a blood vessel image of a target subject. The systems may generate, based on the blood vessel image, a point cloud including a plurality of data points representing a plurality of blood vessel points of the target subject. Each of the plurality of data points may include values of one or more reference features of the corresponding blood vessel point. The systems may further for each of the plurality of blood vessel points, determine values of one or more target features of the blood vessel point based on the point cloud using a determination model. The determination model may be a trained deep learning model.

Abstract: An electronic device includes a package substrate having a top surface and a bottom surface. An integrated circuit (“IC”) die is disposed on the top surface of the package substrate. The electronic device also includes a stiffener having a ring body and a plurality of support members. The ring body is secured to the top surface of the package substrate and circumscribes the IC die. The plurality of support members extend from the ring body to below the bottom surface of the package substrate.

Abstract: Gadolinia particles containing molybdenum. A method for producing the gadolinia particles, including calcining a gadolinium compound in the presence of a molybdenum compound.

Abstract: The present disclosure discloses a method and system for achieving BLE MIDI controller instruction control based on a virtual MIDI port, comprising: carrying out the port simulation on an operation system, and creating a plurality of virtual MIDI ports; when it is detected that a BLE MIDI controller is connected to the operation system, the virtual MIDI ports is automatically allocated to a connected BLE MIDI controller, and a connection state of the BLE MIDI controller is detected in real time; the BLE MIDI controller encapsulates a normal MIDI messages to be sent out and a corresponding virtual MIDI port in a sysex exclusive messages to obtain a corresponding functional sysex exclusive messages, and sends the functional sysex exclusive messages to a decoder. According to the BLE MIDI controller, the purposes of the present disclosure effectively solving data conflicts and expanding the action range of the BLE MIDI controller are achieved.

Abstract: Disclosed herein is a micro LED projector comprising: a micro LED panel and a collimator unit. The micro LED structure in the micro LED panel comprises a mesa structure and a micro lens formed above the micro mesa structure, a p type semiconductor layer, an n type semiconductor layer and a light emitting layer formed between the p type semiconductor layer and the n type semiconductor layer. The center of the micro lens is at a straight line which connects the center of the light emitting layer with the center of the collimator unit. The present disclosure decreases the volume and the weight of the micro LED projector.

Abstract: Disclosed herein are a micro LED structure and a micro LED projector. The micro LED structure comprises: a mesa structure and a reflective structure; wherein, the rays emitted from the sidewall of the mesa structure can be reflected by the reflective structure toward outside. The present disclosure can control the chief ray angle of the micro LED structure and reduce the loss of the light emitting from the sidewall of the mesa structure.

Abstract: The present disclosure provides a parameter calibration importing method for importing calibration parameter into an UWB module, the parameter calibration importing method includes determining the calibration parameter according to requirements of the UWB module, storing the calibration parameters, and writing the corresponding calibration parameters into an UWB chip according to the identity information. Wherein the calibration parameter is associated with identity information of the UWB module.

Abstract: A method includes: determining a plurality of stress amplitude ranges based on a plurality of preset discrete stress amplitudes; determining a plurality of dynamic S-N curves based on the plurality of discrete stress amplitudes and an attenuation coefficient of each stress amplitude range, where the attenuation coefficient of each stress amplitude range indicates a degradation degree of material performance of a steel box girder corresponding to each stress amplitude range relative to material performance of a steel box girder corresponding to a previous stress amplitude range; and predicting a service life of a steel box girder based on the plurality of dynamic S-N curves, a plurality of monitored stress amplitudes of the steel box girder, and a plurality of monitoring cycle quantities in a one-to-one correspondence with the plurality of monitored stress amplitudes, where the plurality of monitored stress amplitudes are located in the plurality of stress amplitude ranges.

Abstract: Disclosed herein are a micro LED display device comprising: at least one monolithic micro LED projectors, formed to generate monochrome images separately in a same color or in a different color; an optical waveguide, formed to receive the monochrome images respectively from the monolithic micro LED projectors, deliver the monochrome images and overlap the monochrome images into an objective image; wherein, the monolithic micro LED panel comprises a micro LED array, use micro LEDs for pixels; the chief ray angle of some micro LEDs are different.

Abstract: A method for controlling a range extender of a vehicle includes determining a plurality of candidate generation strategies for a range extender of a vehicle during a future route; determining energy efficiency contribution information of each candidate generation strategy, in which, the energy efficiency contribution information is configured for representing a relationship between a cost and generated energy; and determining a target generation strategy according to the energy efficiency contribution information of each candidate generation strategy, and controlling operation of the range extender according to the target generation strategy.

Abstract: The present disclosure relates to a cap assembly and a secondary battery. The cap assembly includes a cap plate provided with an electrode lead-out hole; an electrode terminal, covering the electrode lead-out hole and including a main body, wherein the main body is provided with a recess on a side wall; an isolating member including a receiving portion, wherein the main body is received in the receiving portion; and a protrusion, connected to an inner wall of the isolating member and extending towards an axis of the electrode lead-out hole, wherein the protrusion is received in the recess so as to prevent the main body from rotating relative to the isolating member. The cap assembly according to the embodiments of the present application can improve an overcurrent capacity and stability of the electrode terminal.

Abstract: A cable includes: plural cable sets each including a pair of core wires, a shielding layer covering the pair of core wires, and an outer layer covering the shielding layer; and plural fixing wires cross-braided outside the cable sets to keep the cable sets in a row position along a lateral direction.