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Fifty Years of Table Functions

机译:表功能五十年

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摘要

Table or lookup functions, TF, are part of System Dynamics models since the very beginning fifty years ago. TF formulation, dynamics and multidimensionality are analyzed and suggestions for their improvement are presented. TF spread nonlinear dynamics to other variables involved and simplify structure, allowing the concentration on problems. Relationships between nonlinear varying eigenvalues and TF' patterns are established, which open the door for SD' software improvements and further research. A general shape, synthesizing typical TF' patterns, plots a normal curve that the Central Limit Theorem of statistics proves as the distribution of any accumulation (level) of random variables. The random face of SD, uncovered by Agent Base Simulation, converges into this normal curve, which gives statistical grounds to lookup relationships and improves policy design by fine-tuning estimation.
机译:自五十年前开始,表或查找函数TF就已成为System Dynamics模型的一部分。分析了TF公式,动力学和多维性,并提出了改进建议。 TF将非线性动力学扩展到所涉及的其他变量,并简化了结构,使您可以专注于问题。建立了非线性变化特征值与TF'模式之间的关系,这为SD'软件的改进和进一步的研究打开了大门。合成典型TF'模式的一般形状绘制了一条正态曲线,统计的中心极限定理证明该正态曲线是随机变量的任何累积(水平)的分布。 Agent Base Simulation未发现的SD随机面收敛到该法线曲线,这为查找关系提供了统计依据,并通过微调估计来改进策略设计。

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