In this paper, the process of building the mechanical model of the isolated structure equivalent system is chiefly introduced.

本文主要介绍隔震结构等代体系力学模型的建立过程。

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The system with unknown input is translated into an equivalent system without unknown input by a simple algebraic transformation.

通过一个简单有效的代数变换，将具有未知输入的系统变换成一个不含未知输入的等价系统；

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This paper presents a concept of "equivalent system" on the basis of the analysis for the way of solving problem by displacement method.

在对位移法解题途径分析的基础上，提出了“等效体系”的概念。

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Gaining access to the system is the equivalent of learning how to operate a filing system, and not accessing the information contained inside, the person familiar with the matter said.

WSJ: Google Attackers Gained Access to Computer Code

But why does Europe need its own "sat nav" system when the rest of the world uses GPS or an equivalent Russian or planned Chinese system?

BBC: NEWS | UK | UK Politics | Galileo: Star project or black hole?

Inflation destroys the middle class, the social equivalent of a levee system, and then the floods come.

FORBES: The Inflation Intifada: Hunger And Revolution In The Third World