Abstract: A sending device sends, by using a first resource and a second resource, a reference signal corresponding to a first port. The first resource and the second resource are respectively on a first OFDM symbol and a second OFDM symbol that are not adjacent to each other. The first port belongs to a first port set or a second port set, a reference signal corresponding to a port in the first port set corresponds to a first cover code on the first resource and the second resource, a reference signal corresponding to a port in the second port set corresponds to a second cover code on the first resource and the second resource, and the first cover code is different from the second cover code.

Abstract: The embodiments of the present disclosure may disclose processing methods, systems, devices, and storage mediums in a distributed framework. The processing method may include: obtaining a position of first data resource; and allocating a ProcessPod to one of the one or more Nodes based on the position of the first data resource and recording an allocation result.

Abstract: An instant messaging system based on blockchain includes: a central node and at least two domain instant messaging servers. The central node includes a management node and a blockchain node. Information about a user is stored in the blockchain node. The at least two domain instant messaging servers correspond to at least two instant messaging applications, respectively. A method for implementing the instant messaging system is implemented at the central node, and includes performing, in response to a request from the domain instant messaging server, a corresponding operation or providing corresponding information about a user to the domain instant messaging server. The central node establishes a communication connection with a plurality of domain instant messaging servers, such that each domain instant messaging server can send respectively data to the central node to realize a data sharing, and an interaction between different domain instant messaging servers.

Abstract: An instant messaging system based on blockchain includes: a central node and at least two domain instant messaging servers. The central node includes a management node and a blockchain node. Information about a user is stored in the blockchain node. The at least two domain instant messaging servers correspond to at least two instant messaging applications, respectively. A method for implementing the instant messaging system is implemented at the central node, and includes performing, in response to a request from the domain instant messaging server, a corresponding operation or providing corresponding information about a user to the domain instant messaging server. The central node establishes a communication connection with a plurality of domain instant messaging servers, such that each domain instant messaging server can send respectively data to the central node to realize a data sharing, and an interaction between different domain instant messaging servers.

Abstract: Embodiments of the present invention provide a method for questioning and answering. For example, the method may comprise: receiving a message input by a user; sending the message to a question-and-answer server such that the question-and-answer server sends the message to one or more answerer clients; in response to users of the answerer clients performing a real time reply operation for the message, entering into a real time session with the users of the answerer clients so as to obtain a reply message from the users of the answerer clients through the real time session. With the present invention, a questioner and an answerer may send and receive messages through clients dedicated for questioning and answering, and both parties may enter into a one-to-one or one-to-many real time session when the answerer replies in real time, therefore better immediacy and better user experience may be achieved. In addition, embodiments of the present invention provide a device for questioning and answering.

Abstract: Embodiments of the present invention provide a method for questioning and answering. For example, the method may comprise: receiving a message input by a user; sending the message to a question-and-answer server such that the question-and-answer server sends the message to one or more answerer clients; in response to users of the answerer clients performing a real time reply operation for the message, entering into a real time session with the users of the answerer clients so as to obtain a reply message from the users of the answerer clients through the real time session. With the present invention, a questioner and an answerer may send and receive messages through clients dedicated for questioning and answering, and both parties may enter into a one-to-one or one-to-many real time session when the answerer replies in real time, therefore better immediacy and better user experience may be achieved. In addition, embodiments of the present invention provide a device for questioning and answering.

Abstract: A method and apparatus for nanocrystallizing a metal surface by laser-induced shock wave-accelerated nanoparticles. The apparatus comprises a control system, a light guiding system, a workbench control system and an auxiliary system, wherein the auxiliary system comprises an air compressor, a paint feeder device, a nanoparticle nozzle, a powder feeder device, an exhaust, a sealed working chamber and a metal nanoparticle recycler device. The method comprises the following steps: pre-processing and fixing a workpiece; activating the air compressor to feed a powder; controlling and adjusting the paint feeder device to eject a black paint; transmitting a high-power pulse laser beam; recycling excess metal nanoparticles; and rinsing non-vaporized/ionized black paint off a surface of the workpiece.

Abstract: A method and apparatus for acquiring a nanostructured coating on a metal surface by using an intense shock wave generated by continuous explosion of a laser-induced plasma is provided. The method comprises: irradiating a laser beam on a black paint surface of an upper opening of a high pressure resistant glass pipe having a black paint strip arranged therein; the black paint absorbing the light energy and producing a plasma; generating an initial plasma explosion shock wave; transmitting the initial plasma explosion shock wave in the high pressure resistant glass pipe; generating a plasma cloud reaching a lower opening of a glass catheter; and, the shock wave pressure outputted embedding nanoparticles into a surface of a workpiece. The apparatus comprises the high pressure-resistant glass pipe with a zigzagging switchback shape or a spiral and inverted cone shape.

Abstract: A method and apparatus for acquiring a nanostructured coating on a metal surface by using an intense shock wave generated by continuous explosion of a laser-induced plasma is provided. The method comprises: irradiating a laser beam on a black paint surface of an upper opening of a high pressure resistant glass pipe having a black paint strip arranged therein; the black paint absorbing the light energy and producing a plasma; generating an initial plasma explosion shock wave; transmitting the initial plasma explosion shock wave in the high pressure resistant glass pipe; generating a plasma cloud reaching a lower opening of a glass catheter; and, the shock wave pressure outputted embedding nanoparticles into a surface of a workpiece. The apparatus comprises the high pressure-resistant glass pipe with a zigzagging switchback shape or a spiral and inverted cone shape.

Abstract: A method and apparatus for nanocrystallizing a metal surface by laser-induced shock wave-accelerated nanoparticles. The apparatus comprises a control system, a light guiding system, a workbench control system and an auxiliary system, wherein the auxiliary system comprises an air compressor, a paint feeder device, a nanoparticle nozzle, a powder feeder device, an exhaust, a sealed working chamber and a metal nanoparticle recycler device. The method comprises the following steps: pre-processing and fixing a workpiece; activating the air compressor to feed a powder; controlling and adjusting the paint feeder device to eject a black paint; transmitting a high-power pulse laser beam; recycling excess metal nanoparticles; and rinsing non-vaporized/ionized black paint off a surface of the workpiece.