Abstract: An electrohydrodynamic gas flowrate amplifier for generating a gasflow comprising a gas flow generator and a gas flow accelerator, where a first gas flow generable by the gas flow generator and directable to the gas flow accelerator. The gas flow accelerator is constructed in a way that the second gas flow is accelerable by the first gas flow. The gas flow accelerator is a Coanda gas flow accelerator and employing the Coanda effect to accelerate the second gas flow by the first gas flow from the gas flow generator to a gas outlet. The gas flow generator is an electrohydrodynamic gas flow generator. Also disclosed is a washer for washing medical instruments comprising an electrohydrodynamic gas flowrate amplifier. The invention also discloses a method of amplifying gas using the electrohydrodynamic gas flowrate amplifier. Also disclosed is the use of an electrohydrodynamic gas flowrate amplifier.

Abstract: Some embodiments of the disclosure provide a cooperative positioning system and method for an unmanned underwater vehicle (UUV) cluster based on ranging and information interaction. In some examples, the cooperative positioning system includes one master UUV, multiple slave UUVs, and a cooperative positioning apparatus. In some examples, the cooperative positioning method includes following steps. A master UUV and a slave UUV perform internal clock disciplining. The master UUV periodically packages a location of the master UUV and a covariance matrix of location estimation into a cooperative positioning data packet and broadcasts the cooperative positioning data packet to slave UUVs of a cluster. The slave UUV receives the cooperative positioning data packet. A cooperative positioning apparatus of the salve UUV constructs a state and a measurement equation according to data. The cooperative positioning apparatus calculates and obtains a cooperative positioning result by using an extended Kalman filter (EKF).

Abstract: A pushing mechanism and an inspection system are provided. The pushing mechanism includes a position-changing device (10), a driving device (20) and a guide device (30). The position-changing device includes a main plate (11) and a pushing element (12) movably disposed on a side of the main plate. The driving device is connected to the main plate and configured to drive the position-changing device to move. After the guide device is in contact with the pushing element, the pushing element may switch between a first state and a second state. A highest point of the pushing element in the first state is higher than a highest point of the pushing element in the second state.

Abstract: A method and system for generating an abstract of a smart contract based on a large language model and semantic enhancement. The method includes: parsing a source code of a smart contract to generate an abstract syntax tree; extracting code semantic information; converting a contract function node of the abstract syntax tree into a function callback chart; and generating a high-quality abstract of code of the smart contract by utilizing the code semantic information extracted by the large language model and callback information in the function callback chart. By learning and understanding the semantic information and callback information of the smart contract function, the large language model can accurately understand and reason deep semantic information of the code to generate the high-quality abstract of the code of the smart contract.

Abstract: Velocity estimation using intelligent reflecting surfaces (e.g., using a computerized tool), is enabled. For example, a system can comprise at least one processor, and at least one memory that stores executable instructions that, when executed by the at least one processor, facilitate performance of operations. The operations can comprise based on a first signal between a receiver and a target object, determining a second signal between the receiver and the target object, wherein the first signal comprises a direct signal, and wherein the second signal comprises an indirect signal conveyed via an intelligent reflecting surface, determining a Doppler frequency of the second signal, and based on the Doppler frequency, determining a velocity estimation of the target object.

Abstract: A material preview method, a medium and an electronic device are provided. The method includes: acquiring a material to be previewed and target preview information, wherein the target preview information comprises a target cloud real machine and an application for showing the material to be previewed, and a target showing style in which the application shows the material to be previewed; and rendering, according to the target cloud real machine and the application in combination with the target showing style, the material to be previewed to obtain a target preview content, wherein the target preview content is to be shown on a terminal device.

Abstract: An inspection system includes a conveying mechanism, a pushing mechanism, a positioning mechanism and an inspection mechanism. The conveying mechanism is configured to convey an object to be inspected. The pushing mechanism is suitable for pushing the object to be inspected in a conveying direction of the conveying mechanism, so as to push the object to be inspected to a first positioning plane and a second positioning plane. The positioning mechanism includes a positioning portion. The positioning portion may move in the conveying direction of the conveying mechanism, so as to define the first positioning plane and the second positioning plane. The object to be inspected abuts against the positioning portion on the first positioning plane and the second positioning plane. The inspection mechanism is suitable for inspecting the object to be inspected when the object to be inspected is located on the first positioning plane and the second positioning plane.

Abstract: A system for releasing the heavy-haul train has a control valve mounted in each of train cars. The control valve is connected to a train pipe, an auxiliary air reservoir and a brake cylinder are connected to the control valve, and an exhaust port is configured on the control valve. The exhaust port is connected to a solenoid valve. The method for improving the release performance of the heavy-haul train includes: S1: the solenoid valve in each of the train cars is powered on to close a passage between the exhaust port of the control valve and the atmosphere; S2: an automatic brake valve is regulated to inflate the train pipe; and S3: the solenoid valve in each of the train cars is powered off to open the passage between the exhaust port of the control valve and the atmosphere, so that the train is released.

Abstract: In a method and an apparatus for controlling an interface theme of a vehicle display terminal, the vehicle display terminal is configured to provide a theme setting interface, and store a plurality of theme interface images. The method may include: obtaining driving data in a driving process of a vehicle user; determining a driving behavior score of the vehicle user based on the obtained driving data and a preset scoring mechanism; determining whether the determined driving behavior score reaches a predetermined value; and when it is determined that the driving behavior score reaches the predetermined value, allowing the vehicle user to select any one of a plurality of theme interface images through the theme setting interface.

Abstract: Some embodiments of the disclosure provide a cooperative positioning system and method for an unmanned underwater vehicle (UUV) cluster based on ranging and information interaction. In some examples, the cooperative positioning system includes one master UUV, multiple slave UUVs, and a cooperative positioning apparatus. In some examples, the cooperative positioning method includes following steps. A master UUV and a slave UUV perform internal clock disciplining. The master UUV periodically packages a location of the master UUV and a covariance matrix of location estimation into a cooperative positioning data packet and broadcasts the cooperative positioning data packet to slave UUVs of a cluster. The slave UUV receives the cooperative positioning data packet. A cooperative positioning apparatus of the salve UUV constructs a state and a measurement equation according to data. The cooperative positioning apparatus calculates and obtains a cooperative positioning result by using an extended Kalman filter (EKF).

Abstract: The present invention disclose a method for digesting RPE cells to dissociate adherent cells, comprising steps: (1) using 1× recombinant enzyme TrypLE to cover RpE cells evenly; (2) using neutral protease Dispase II solution to cover RPE cells evenly, in which steps (1) and (2) are applied step by step.

Abstract: A system for releasing the heavy-haul train hascomprises a control valve mounted in each of train cars. The control valve is connected to a train pipe, an auxiliary air reservoir and a brake cylinder are connected to the control valve, and an exhaust port is configured on the control valve. The exhaust port is connected to a solenoid valve. The method for improving the release performance of the heavy-haul train includes: S1: the solenoid valve in each of the train cars is powered on to close a passage between the exhaust port of the control valve and the atmosphere; S2: an automatic brake valve is regulated to inflate the train pipe; and S3: the solenoid valve in each of the train cars is powered off to open the passage between the exhaust port of the control valve and the atmosphere, so that the train is released.

Abstract: A multidimensional demonstration method and device for ferrofluid are provided. The device includes a container, a plurality of magnetic field generators, ferrofluid, and a transparent medium. The container is a closed structure with a hollow interior, and both the ferrofluid and the transparent medium are contained in the container. The container is a curved surface body with at least two planar outer walls, or a polyhedron, M magnetic field generators are installed on each at least two planar outer walls of the container, one side wall of a plurality of outer walls of the container without the magnetic field generators installed is set as an observation surface, the observation surface is made of a transparent material, where M is greater than or equal to 1. During operation, a magnetic field strength of the magnetic field generators is adjusted to control a motion of the ferrofluid in the container.

Abstract: An endoscopic attachment and an endoscopic system are provided. The endoscopic attachment includes a proximal portion configured to be coupled to an insertion tube of the endoscope; and a distal portion coupled to the proximal portion and extending forwardly from the proximal portion to a forward edge. The distal portion includes a first axial segment that extends from the proximal portion axially to the forward edge by a first axial length, defines a passage, and extends circumferentially entirely around an axis of the passage; and a second axial segment that extends a second axial length from the first axial segment to the forward edge, and extends circumferentially around the axis of the proximal portion less than 360 degrees over at least part of the second axial length. The endoscopic attachment allows for tissues to be cut more efficiently and/or effectively during ESD, POEM and other procedures.

Abstract: Embodiments disclosed include a method for establishing a communication connection. The method includes: receiving a connection request message transmitted by a first terminal, the connection request message carrying a first user identifier and a second user identifier; determining a second relay node corresponding to the second user identifier, the second relay node being a relay node communicatively connected to a second terminal; transmitting the connection request message to the second relay node through a relay path to the second relay node, so that the second relay node transmits the connection request message to the second terminal; and transmitting, in response to receiving a connection confirmation message returned by the second terminal, the connection confirmation message to the first terminal, so that the first terminal establishes a communication connection with the second terminal based on the connection confirmation message.

Abstract: A method for positioning an underwater glider based on a virtual TDOA of a single beacon is provided. In the method, a positioning beacon periodically sends positioning messages, where the positioning message includes longitude, latitude and depth information of the positioning beacon; the underwater glider receives the positioning messages and records TOAs at which the positioning messages arrive at an acoustic positioning signal receiving module; and the underwater glider parses the positioning messages and stores positioning message data, creates virtual beacons based on beacon information and attitude information of the underwater glider, corrects the TOAs, and calculates a position of the underwater glider according to a TDOA algorithm. According to the method, the underwater glider passively listens to and receives the positioning messages without sending a positioning request to the positioning beacon, making the entire positioning process energy-saving with a certain degree of concealment.