Discrete system: All properties are modeled as discrete,such as dynamic response at spatial coordinates,both mass and stiffness,as well as damping ==>In matrix from =>ODE (Ordinary Differential Equations) Distributed system: Physical properties are modeled as distributed characteristics.Also called continuous system, distributed-parameter system =>Infinite number of DOF ==>PDE(Partial Differential Equations) 目 土亦工鞋季悦  Discrete system: All properties are modeled as discrete, such as dynamic response at spatial coordinates, both mass and stiffness, as well as damping ==>In matrix from ==> ODE (Ordinary Differential Equations)  Distributed system: Physical properties are modeled as distributed characteristics. Also called continuous system, distributed-parameter system ==>Infinite number of DOF ==> PDE (Partial Differential Equations)