Abstract: A method and corresponding device for determining forwarding rule for data packet in Virtual Private LAN Service with Provider Backbone Bridge (PBB-VPLS) network are disclosed. In the method, a value in a backbone service instance identifier (I-SID) field of the received data packet is firstly examined, then a virtual split horizon group corresponding to the data packets is determined based on the I-SID value, wherein the virtual split horizon group defines a forwarding rule for the data packets between different pseudo wire ports of the PBB-VPLS network. With the dynamic split horizon group, the method dynamically adapts to different forwarding rules for multiple I-VPLS instances with different tree topologies, and is capable of supporting multiple I-VPLS instances with different root sites and tree topologies in one B-VPLS instance, thereby ensuring the stability of the backbone network and reducing the network operation cost.

Abstract: 6-amino quinazoline or 3-cyano quinoline derivatives, preparation methods and pharmaceutical uses thereof are disclosed. Specifically, the present disclosure discloses novel 6-amino quinazoline or 3-cyano quinoline derivatives presented by general formula (I), or tautomers, enantiomers, diastereomers, racemates or pharmaceutically acceptable salts thereof, or metabolites, metabolic precursors or prodrugs thereof, and their uses as treatment agents especially as protein kinase inhibitors, in which each substitutent group of general formula (I) is as defined in the specification.

Abstract: A kind storing energy type of impact control mechanism for pneumatic wrench comprises a flying hammer and a centrifugal valve fitted in the flying hammer, a timing mechanism, a spring, a retaining ring, a limiting device composed of a limiting key-slot on the centrifugal valve and a limiting plunger head with one end sticking into the centrifugal valve chamber and an impact pin. Besides, there are a stretching air duct to make the impact pin stretch and a transition air duct, and a retracting air duct to make the impact pin retract. And on the outer periphery of the centrifugal valve there are a concentric annular slot and an eccentric slot communicating with each other, and another concentric annular spaced apart from them. The above-mentioned structure can raise the controlled air pressure in pneumatic wrench, lower machining difficulty and reduce flying hammer height.