The meetings will be held on an ad hoc basis.

会议将按需要随时召开。

This is an ad hoc committee specially established to deal with a particular subject.

这是家专门成立的处理某问题的特别委员会。

The simulation results show that,compared with the protocols,EDGK is better in the group rekey success ratio and delay in mobile Ad hoc network environment.

模拟试验表,提出的组密钥管理方案在移动自组网络中具有良好的性。