更改

[[File:Stampede loop.png|thumb|【图2：Causal loop diagram that depicts the causes of a stampede as a positive feedback loop. 在因果环路图中，踩踏事件的发生是一个正反馈循环。】|链接=Special:FilePath/Stampede_loop.png]]

[[File:Stampede loop.png|thumb|【图2：Causal loop diagram that depicts the causes of a stampede as a positive feedback loop. 在因果环路图中，踩踏事件的发生是一个正反馈循环。】|链接=Special:FilePath/Stampede_loop.png]]

[[File:Birmingham Northern Rock bank run 2007.jpg|thumb|right|【图3：In sociology a network effect can quickly create the positive feedback of a bank run. The above photo is of the UK Northern Rock 2007 bank run. 在社会学中，网络效应可以迅速产生银行挤兑的正反馈效应。上图是2007年英国北岩银行挤兑事件的照片。】|链接=Special:FilePath/Birmingham_Northern_Rock_bank_run_2007.jpg]]

[[File:Birmingham Northern Rock bank run 2007.jpg|thumb|right|300px|【图3： 在社会学中，网络效应可以迅速产生银行挤兑的正反馈效应。上图是2007年英国北岩银行挤兑事件的照片。】|链接=Special:FilePath/Birmingham_Northern_Rock_bank_run_2007.jpg]]