Relationship between the magnitude of singular value and nonlinear stability

The relationship between the magnitude of singular value and nonlinear stability or instability of the basic flow is investigated. The results show that there is a good corresponding relationship between them. The magnitude of singular value decreases as the stability (or instability) of the basic flow increases (or decreases). In the stable case, the magnitude of the maximum singular value is much smaller than in the unstable case.     

非线性稳定性与奇异直的关系

研究了奇异值的大小与基流的非线性稳定性和不稳定性的关系.结果表明,它们两者之间存在很好的对应关系;奇异值的大小随着基流的稳定性(不稳定性)加强而变小(增大).稳定情形下最大奇异值明显小于不稳定情形下的最大奇异值.     

摩擦式提升机第一故障诊断技术的设计研究

该文对摩擦式提升机第一故障诊断技术的研究进行论述,实现对摩擦式提升机的运行工况进行实时监测,当提升机系统发生故障时,可按故障发生的时间顺序对故障信息进行记录与显示,为故障的排除提供便利,减少排查故障时间,提高生产效率.