Abstract: A method for manufacturing iron-based metallurgical parts, the method comprising: mixing graphite powder; pressing; presintering; oxidizing the presintered metallurgical part to form an oxide layer having a thickness of 1 ?m to 50 ?m on its surface to form an oxidized presintered metallurgical part; sintering; machining; carburizing; quenching and tempering. An oxide layer is formed on the surface of a part by oxidization, oxygen in the oxide layer is chemically reacted with the carbon in the surface layer of the product during the sintering, and the resulting product enters a sintering atmosphere in the form of gas to form a decarburized layer having a certain thickness on the surface of the part, so that the decarburization is realized.

Abstract: The method includes that: when a first service has yet not ended before an original lifetime of a first IPv6 address terminates, a first terminal sends an address updating request message for querying about whether or not the first service supports IPv6 address updating to a second terminal; the first terminal receives an address updating response message returned by the second terminal; when a first determination result carried in the address updating response message indicates that the first service supports IPv6 address updating, the first terminal requests to establish a backup session for the first service with the second terminal by virtue of a second IPv6 address, which is pre-stored; and in the case that the first service has yet not ended when the original lifetime of the first IPv6 address terminates, the first terminal continues executing the first service with the second terminal by virtue of the backup session.

Abstract: Disclosed is a portal authentication method including: sending, by a portal server, an information query message to the Broadcast Network Gateway (BNG) currently accessed by a User Equipment (UE) after the portal server receives a Hyper Text Transport Protocol (HTTP) request sent from the UE; and collecting, by the BNG, the information of the UE according to the information query message sent from the portal server and feeding the collected information of the UE back to the portal server through a response message. A BNG, a portal server, a system and a computer storage medium are also disclosed.

Abstract: A method and apparatus for backing up user information are disclosed. The method includes: establishing a plurality of selection switch protocol groups between a same port of a standby service node and ports of a plurality of main service nodes respectively; the standby service node regularly receiving user information of access users from the ports of the plurality of main service nodes, and storing the user information to a main control unit of the standby service node; keeping a detection relation between the same port of the standby service node and the ports of the plurality of main service nodes; the standby service node sending to an interface unit of the standby service node the user information of the access user of that port stored in the main control unit, and according to the selection switch protocol, switching the same port of the standby service node to be main.

Abstract: An address distribution method is disclosed by the present invention, in which two Broadband Remote Access Servers (BRAS) which are mutually backup devices respectively occupy part of the address resources in a shared address pool, and the method includes: when detecting a user online, a BRAS selecting an address from the corresponding part of address resources in the shared address pool and distributing the address to the user; and the BRAS sending a notification message to the backup device, and informing the backup device of the address occupied by the user. A BRAS and an address distribution system is further disclosed by the present invention, and the problem of address collision generated when a pair of BRASs which are mutually backup devices distribute the addresses to their respective user in the dual-server hot backup scenario is solved by the method, device and system of the present invention.

Abstract: A method and apparatus for backing up user information are disclosed. The method includes: establishing a plurality of selection switch protocol groups between a same port of a standby service node and ports of a plurality of main service nodes respectively; the standby service node regularly receiving user information of access users from the ports of the plurality of main service nodes, and storing the user information to a main control unit of the standby service node; keeping a detection relation between the same port of the standby service node and the ports of the plurality of main service nodes; the standby service node sending to an interface unit of the standby service node the user information of the access user of that port stored in the main control unit, and according to the selection switch protocol, switching the same port of the standby service node to be main.

Abstract: An address distribution method is disclosed by the present invention, in which two Broadband Remote Access Servers (BRAS) which are mutually backup devices respectively occupy part of the address resources in a shared address pool, and the method includes: when detecting a user online, a BRAS selecting an address from the corresponding part of address resources in the shared address pool and distributing the address to the user; and the BRAS sending a notification message to the backup device, and informing the backup device of the address occupied by the user. A BRAS and an address distribution system is further disclosed by the present invention, and the problem of address collision generated when a pair of BRASs which are mutually backup devices distribute the addresses to their respective user in the dual-server hot backup scenario is solved by the method, device and system of the present invention.