分析了系统的非负不变性、边界平衡点性质及全局渐近稳定性。

Mathematical analyses of the model equations with regard to invariance of non-negativity, nature of equilibria and global stability are analyzed.

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在“信号与系统”课程中，时不变性是系统的重要性质。

The time-invariance is a crucial property of systems in the course of Signals and Systems.

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该表示形式中没有权因子和额外的控制参数，而且具有几何不变性、仿射不变性等良好性质。

The representation has no weight factors or control parameters, and it is geometric and affine invariant.

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