Abstract: An annular airflow regulating apparatus includes a cup-shaped element and an adjustment element. The cup-shaped element has a bowl and a bottom, integrated to form a first chamber. The bottom has a tapered channel parallel to an axis and penetrating through the bottom. A ring-shaped groove is disposed between the tapered channel and the bottom. The ring-shaped groove has an annular plane perpendicular to the axis. The adjustment element, having a tapered portion and second holes, is movably disposed in the cup-shaped element. The tapered portion protrudes into the tapered channel A tapered annular gap is formed between the tapered portion and the tapered channel. When the adjustment element is moved with respect to the cup-shaped element, a width of the tapered annular gap is varied, and thereupon a flow rate and velocity of the process gas would be varied accordingly.

Abstract: A network service control method detects whether a mobile node communicating with a corresponding node is trending to a second local area network from a first local area network and forks and transmits a user agent and a server agent to a proxy when the mobile node is trending to the second local area network. After that, the user agent registers onto the proxy according to a result obtained by the handshaking. Finally, when the mobile node moves into the second local area network, the mobile node communicates with the user agent for obtaining a connection tunnel reserved by the user agent to communicate with the corresponding node.

Abstract: A network service control method detects whether a mobile node communicating with a corresponding node is trending to a second local area network from a first local area network and forks and transmits a user agent and a server agent to a proxy when the mobile node is trending to the second local area network. After that, the user agent registers onto the proxy according to a result obtained by the handshaking. Finally, when the mobile node moves into the second local area network, the mobile node communicates with the user agent for obtaining a connection tunnel reserved by the user agent to communicate with the corresponding node.

Abstract: A method and system of connection handover from a first wireless server to a second wireless server in a connection between a mobile device and an intranet. The method comprises employing a SIM-based pre-authentication with a mobile agent of the mobile device prior to handing over the connection to the second wireless server, and handing over the connection to the second wireless server upon a predetermined condition.