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第13行： − 系统动力学是利用存量、流量、内部反馈回路、表函数和时滞来理解复杂系统在一段时间内的非线性行为的一种方法。+ 第19行：
第19行： − + − ==Overview== − − 概览
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System dynamics (SD) is an approach to understanding the nonlinear behaviour of complex systems over time using stocks, flows, internal feedback loops, table functions and time delays.
System dynamics (SD) is an approach to understanding the nonlinear behaviour of complex systems over time using stocks, flows, internal feedback loops, table functions and time delays.
'''系统动力学 System Dynamics，SD'''是利用存量、流量、内部反馈回路、表函数和时滞等信息来理解复杂系统在一段时间内的非线性行为的一种方法。
==Overview==
==概览 Overview==
System dynamics is a methodology and mathematical modeling technique to frame, understand, and discuss complex issues and problems. Originally developed in the 1950s to help corporate managers improve their understanding of industrial processes, SD is currently being used throughout the public and private sector for policy analysis and design.<ref name ="UDE"/>
System dynamics is a methodology and mathematical modeling technique to frame, understand, and discuss complex issues and problems. Originally developed in the 1950s to help corporate managers improve their understanding of industrial processes, SD is currently being used throughout the public and private sector for policy analysis and design.<ref name ="UDE"/>