此算法采用上下两层，即下层N个基础种群和上层一个精英种群。
This algorithm includes two levels:the lower level of N basic swarms and the upper level of elite swarm.
SCTP无需基础网络的额外支持，对上层和下层的服务保持透明的接口，是快速实施异构网络无缝业务的理想方案。
SCTP is running on infrastructure network without need for additional support services, and it keeps transparent interfaces to the upper and lower service.
在疲劳试验的基础上，对上下层布式钢纤维混凝土的抗折疲劳强度进行了研究，得到了上下层布式钢纤维混凝土的抗折疲劳方程。
Based on fatigue tests, this paper studies the flexural fatigue strength of layer steel fiber reinforced concrete, and gives the flexural fatigue equation.
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