This paper presents a laboratory study on bridge pier protection with surface guide panels (SGP) in clear-water experiments. The SGP is installed by piercing a
The newly designed vacuum differential pressure casting (VDPC) unit was introduced, by which the capability of the VDPC process to produce thin-walled complicat
Security management of group key is becoming a key problem of multicast security. This paper summarizes five kinds of policy of rekeying group key and some of e