The source process of partial area pre-displacement is finite moving source and that of whole area pre-displacement is combination of finite moving source and instantaneoussource.
局域预位移的震源过程为有限源传播，全域预位移为有限源与瞬时面源。
2
A split mirror of a DB2 UDB database can be initialized as a snapshot of the source database, essentially an instantaneous clone of the source database.
DB 2 UD b数据库的分割镜像可以被初始化为源数据库的一个快照，实质上是源数据库的一个瞬时克隆。
3
The method of instantaneous value comparison for source current control of unity power factor rectifier possesses advantages of simplicity as well as valid restriction for maximum switching frequency.