linear time-invariant systems的用法和樣例：
例句
- The state-space representation and the transfer function representation of fractional order linear time-invariant systems are introduced.
摘要介紹了分數階線性定常系統的狀態方程描述和傳遞函數描述。 - Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根據變換方程與約束方程顯含時間的等價性，提出了定常約束與定常系統判據的等同表述。
