Abstract: A network congestion control method, a node and a system are disclosed, where the method is applied to a spine-leaf network system. The method includes: a spine node receives network information sent by the at least one leaf node, where the network information includes network topology information of the leaf node and a network performance indicator of the leaf node; networks the at least one leaf node and the spine node based on the network topology information of the at least one leaf node, to obtain a combined network topology; and if the combined network topology is a global network topology of the spine-leaf network system, performs network congestion control on the at least one leaf node based on the network performance indicator of the at least one leaf node.

Abstract: A network congestion processing method includes performing Explicit Congestion Notification (ECN) marking on a packet using first ECN configuration information, obtaining first network status information indicating a network status when the first ECN configuration information is used; determining second ECN configuration information based on the first ECN configuration information and the first network status information; and performing ECN marking on the packet using the second ECN configuration information.

Abstract: A network congestion control method, a node and a system are disclosed, where the method is applied to a spine-leaf network system. The method includes: a spine node receives network information sent by the at least one leaf node, where the network information includes network topology information of the leaf node and a network performance indicator of the leaf node; networks the at least one leaf node and the spine node based on the network topology information of the at least one leaf node, to obtain a combined network topology; and if the combined network topology is a global network topology of the spine-leaf network system, performs network congestion control on the at least one leaf node based on the network performance indicator of the at least one leaf node.

Abstract: This invention belongs to the technical field of composite materials, and discloses a xylan-based dual network nanocomposite hydrogel, preparation method thereof and use therefor. The method comprises (1) adding graphite oxide powder into deionized water, ultrasonically dispersing to obtain a GO aqueous dispersion; (2) adding xylan into deionized water, heating and stirring to obtain a xylan solution; (3) adding a water-soluble calcium salt, a reaction monomer and the xylan solution into the GO aqueous dispersion, and stirring and dispersing uniformly under an ice-bath condition, then adding an initiator, a crosslinking agent and an accelerator, stirring and mixing uniformly to obtain a mixed solution; and 4) drying and reacting the mixed solution (in the step (3) to obtain a xylan-based dual network nanocomposite hydrogel.

Abstract: The present invention belongs to the technical field of composite materials, and disclosed are a xylan-based double network nanocomposite hydrogel and the preparation and application thereof. The method includes: (1) adding a graphite oxide powder into deionized water, and ultrasonically dispersing to obtain a GO water dispersion; (2) adding xylan into deionized water, heating and stiffing to obtain a xylan solution; (3) adding a water-soluble calcium salt, a reaction monomer and the xylan solution into the GO water dispersion, stiffing and dispersing uniformly under an ice-bath condition, adding an initiator, a cross-linking agent and an accelerator, and stiffing to mix well so as to obtain a mixed solution; (4) subjecting the mixed solution of step (3) to a drying reaction, to obtain the xylan based double network nanocomposite hydrogel. The composite hydrogel obtained in the present invention has high mechanical properties, is biodegradable and has good biocompatibility.

Abstract: Embodiments of the present invention provide a network congestion control method, a device, and a system. The method includes: receiving a first congestion control message, where the first congestion control message carries a 5-tuple of a packet that causes congestion; obtaining a flow identifier of the packet based on the 5-tuple of the packet that causes the congestion; generating a second congestion control message, where the second congestion control message carries the flow identifier corresponding to the 5-tuple; and sending the second congestion control message to a source node of the packet. In the embodiments of the present invention, a network congestion problem of a layer 3 IP network can be resolved.

Abstract: A method and an apparatus for sending a TCP data packet and a system. The method includes: obtaining a first round-trip time of sending a TCP data packet in a network, and determining a second round-trip time; if the first round-trip time is longer than the second round-trip time, using a congestion window determined according to a first algorithm as a first congestion window; otherwise, using a congestion window determined according to a second algorithm as the first congestion window; and sending the TCP data packet by using the first congestion window. In the technical solution disclosed in the present invention, a current congestion window that exists when a first round-trip time is obtained grows to a first congestion window at one go, so that a requirement of a service for a throughput can be better met, and a network bandwidth can be utilized more effectively.

Abstract: Embodiments of the present invention provide a network congestion control method, a device, and a system. The method includes: receiving a first congestion control message, where the first congestion control message carries a 5-tuple of a packet that causes congestion; obtaining a flow identifier of the packet based on the 5-tuple of the packet that causes the congestion; generating a second congestion control message, where the second congestion control message carries the flow identifier corresponding to the 5-tuple; and sending the second congestion control message to a source node of the packet. In the embodiments of the present invention, a network congestion problem of a layer 3 IP network can be resolved.

Abstract: A method and an apparatus for sending a TCP data packet and a system. The method includes: obtaining a first round-trip time of sending a TCP data packet in a network, and determining a second round-trip time; if the first round-trip time is longer than the second round-trip time, using a congestion window determined according to a first algorithm as a first congestion window; otherwise, using a congestion window determined according to a second algorithm as the first congestion window; and sending the TCP data packet by using the first congestion window. In the technical solution disclosed in the present invention, a current congestion window that exists when a first round-trip time is obtained grows to a first congestion window at one go, so that a requirement of a service for a throughput can be better met, and a network bandwidth can be utilized more effectively.

Abstract: A data transmission method, a network server, a user terminal, and a system, where the data transmission method includes obtaining congestion control algorithm determining information, determining, according to the congestion control algorithm determining information, a congestion control algorithm used in data transmission with the user terminal, and performing data transmission with the user terminal using the congestion control algorithm. Hence, a corresponding congestion control algorithm can be selected according to an access type and a network access mode of the user terminal, and Transmission Control Protocol (TCP) transmission efficiency is improved.

Abstract: Embodiments of the present application relate to a web page retrieval method, a web page retrieval device, and a computer program product for retrieving a web page. A web page retrieval method is provided. The method includes receiving a query, retrieving an attribute identifier of a web page to be retrieved and a query range related to the attribute identifier, based on the query, obtaining a range of attribute values, determining whether an intersection between the range of attribute values to be retrieved and a plurality of index ranges established in advance in a system receiving the inputted query exists, in the event that the intersection exists, retrieving a web page relating to intersecting index ranges, the attribute identifier of the web page corresponding to the attribute identifier of the web page to be retrieved, and the attribute values intersecting the query range, and returning the retrieved web page.