The time-invariance is a crucial property of systems in the course of Signals and Systems.
在“信号与系统”课程中，时不变性是系统的重要性质。
2
Fingerprint identification has been one of the most effective methods on personal identification from long time ago due to fingerprints' uniqueness and invariance.
由于指纹具有唯一性和不变性，长期以来指纹识别一直是个人身份识别最有效的方法之一。
3
In this paper, the robust positive invariance of given linear state constraint sets of uncertain discrete time systems is studied by means of the mixed monotone decomposition method.