Abstract: A system for controlling the amount of a liquid carbon source released to a constructed wetland, includes: a carbon source pool, a carbon source pipe, a peristaltic pump, a programmable logic controller (PLC), a computer, a first flow meter, a first chemical oxygen demand (COD) sensor, a first total nitrogen (TN) sensor, a second TN sensor, a second COD sensor, an inlet pipe, and an outlet pipe. The first flow meter, the first COD sensor, and the TN sensor are disposed on the inlet pipe; the second COD sensor and the second TN sensor are disposed on the outlet pipe; the inlet pipe and the outlet pipe are connected to the constructed wetland; the carbon source pipe is connected to the carbon source pool via the peristaltic pump; the computer, the peristaltic pump, the first flow meter, and all sensors are connected to the PLC controller.

Abstract: The present invention provides a network topology hiding method and device. The method includes: receiving a first service request, where the first service request is sent by a subscriber through a first network function entity and includes a name of the first network function entity and a subscriber identifier; determining a virtual name set corresponding to the name of the first network function entity, where the virtual name set includes at least two virtual names; and determining one virtual name from the virtual name set, and replacing the name of the first network function entity with the determined virtual name. The unfixed replacement further ensures effectiveness of network topology hiding.

Abstract: A method and a network device for managing Diameter routing are disclosed in the communication technology. The network device avoids frequently sending a Diameter message on a faulty routing. In the method: a network apparatus receives a first Diameter message configured to be delivered to a destination node. The network apparatus determines a routing status of a primary routing from the network apparatus to the destination node according to recorded routing status from the network apparatus to the destination node. The network apparatus sends the first Diameter message through the primary routing if the routing status of the primary routing is normal. The network apparatus sends the first Diameter message through an alternative routing from the network apparatus to the destination node if the routing status of the primary routing is faulty.

Abstract: The present invention provides a network topology hiding method and device. The method includes: receiving a first service request, where the first service request is sent by a subscriber through a first network function entity and includes a name of the first network function entity and a subscriber identifier; determining a virtual name set corresponding to the name of the first network function entity, where the virtual name set includes at least two virtual names; and determining one virtual name from the virtual name set, and replacing the name of the first network function entity with the determined virtual name. The unfixed replacement further ensures effectiveness of network topology hiding.

Abstract: A method and a network device for managing Diameter routing are disclosed in the communication technology. The network device avoids frequently sending a Diameter message on a faulty routing. In the method: a network apparatus receives a first Diameter message configured to be delivered to a destination node. The network apparatus determines a routing status of a primary routing from the network apparatus to the destination node according to recorded routing status from the network apparatus to the destination node. The network apparatus sends the first Diameter message through the primary routing if the routing status of the primary routing is normal. The network apparatus sends the first Diameter message through an alternative routing from the network apparatus to the destination node if the routing status of the primary routing is faulty.