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首页> 外文会议>Proceedings of the 22nd International Conference of the System Dynamics Society >Why and How Should We Replace the Tank-Pipe Analogy of ourStock-Flow Models by a Chemical Process Metaphor
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Why and How Should We Replace the Tank-Pipe Analogy of ourStock-Flow Models by a Chemical Process Metaphor

机译：为什么和如何用化学过程隐喻代替我们的股票-流量模型的储罐-管道比喻

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At the 2002 Congress of the System Dynamics Society, the author presented a new stock-flow diagramminglanguage replacing the tank-pipe analogy classical in System Dynamics (SD) by a generalised chemical reaction. He arguedthat its use results often in better, more intuitive and less spaghetti-like stock-Flow diagrams (SFD). The paper was very wellreceived by its reviewers. However, its presentation at the congress was disappointing since, despite its confrontationalcharacter, it elicited almost no reactions. With hindsight, it became evident that the author had focused too much on the newlanguage and not enough on a detailed analysis of why the current method may be unsatisfactory. Henceforth, the presentpaper presents this detailed study of the SFD language used in SD. We restrict our attention to the parts of a SFD whichrepresents flows of matter-like entities (tangibles). Focusing on models in population dynamics we begin by presenting theirbasic problem: visual complexity due to a spaghetti-like aspect. We then argue that, in addition, these models do not match wellthe structure of our mental models and thus lack intuitiveness. We then show that a new metaphor, replacing the tank Pipesystems of our classical SFD by generalised pluri-molecular chemical reactions called (N,M)-processes eliminates all theproblems discussed. We present a way to combine a set of (N,M)-processes in a map displaying their interactions intuitivelyand parsimoniously. Finally, we argue that the use of these maps is not restricted to chemical or population dynamics modelsbut may be used very fruitfully in other applications like for instance in Business Dynamics. We end up by referring the reader toour previous Palermo paper for a discussion of the translation of these maps in fully fledged computational models called"Kinetic Process Graphs or KPG" which, in our opinion, should supersede the stock-flow diagramming method currently used.
机译：在2002年系统动力学学会大会上，作者提出了一种新的库存流程图 该语言通过广义化学反应代替了System Dynamics（SD）中经典的储罐管道类比。他争辩 它的使用通常会产生更好，更直观且不像意大利面条的股票流图（SFD）。纸很好 收到评论者的好评。然而，尽管它存在对抗性，但它在大会上的介绍令人失望 角色，几乎没有引起任何反应。事后看来，很明显，作者对新内容的关注过多了。 语言，并且对目前的方法为何不能令人满意的详细分析还不够。从今以后 本文介绍了SD中使用的SFD语言的详细研究。我们将注意力集中在SFD的哪些部分上 表示类似物质的实体（有形）的流动。我们着重介绍人口动态中的模型 基本问题：由于类似意大利面条的外观，视觉上的复杂性。然后，我们认为，此外，这些模型还不能很好地匹配 我们的心理模型的结构，因此缺乏直观性。然后，我们展示了一个新的隐喻，取代了坦克Pipe 我们经典SFD的系统通过称为（N，M）-过程的广义多分子化学反应消除了所有 问题讨论。我们提出了一种在地图上结合一组（N，M）个过程的方法，以直观地显示它们的相互作用 和par。最后，我们认为这些地图的使用不限于化学模型或种群动力学模型 但可以在其他应用程序（例如Business Dynamics）中非常有效地使用。最后，通过向读者介绍 我们之前的Palermo论文讨论了在完全成熟的计算模型中这些地图的翻译，该模型称为 我们认为，“运动过程图或KPG”应取代当前使用的库存流程图。

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