− | '''三元闭包 Triadic closure'''是[[社会网络 social network]]理论中的一个概念,最早由德国社会学家格奥尔格·西梅尔 Georg Simmel在其1908年的著作《社会学:社会形式的调查 Sociology: Investigations on the Forms of Sociation》中提出。<ref>[https://www.nytimes.com/2007/12/17/style/17facebook.html?pagewanted=print Georg Simmel], originator of the concept: "Facebook" article at the New York Times website. Retrieved on December 21, 2007.</ref>三元闭包指的是由A,B,C三个[[节点 node]]所组成的三元组的一种性质,即如果A-B和A-C之间存在强联系,则B-C之间也仅存在强联系。<ref>[https://serendipstudio.org/complexity/course/emergence06/bookreviews/kmaffei.html Working concept] of triadic closure: book review of Duncan Watts' "Six Degrees: The Science of a Connected Age" at the ''Serendip'' (Bryn Mawr College) website. Retrieved on December 21, 2007.</ref> 这一性质过于极端,以至于它难以在规模较大、结构复杂的网络中被满足,然而在理解网络与网络预测等方面,它却是一种十分有用的对现实的简化。<ref name=Easley>Easley, D, & Kleinberg, J. (2010). Networks, crowds, and markets: reasoning about a highly connected world. Cornell, NY: Cambridge Univ Pr.</ref> | + | '''三元闭包 (Triadic closure)'''是[[社会网络 social network]]理论中的一个概念,最早由德国社会学家格奥尔格·西梅尔 Georg Simmel在其1908年的著作《社会学:社会形式的调查 Sociology: Investigations on the Forms of Sociation》中提出。<ref>[https://www.nytimes.com/2007/12/17/style/17facebook.html?pagewanted=print Georg Simmel], originator of the concept: "Facebook" article at the New York Times website. Retrieved on December 21, 2007.</ref>三元闭包指的是由A,B,C三个[[节点 node]]所组成的三元组的一种性质,即如果A-B和A-C之间存在强联系,则B-C之间也仅存在强联系。<ref>[https://serendipstudio.org/complexity/course/emergence06/bookreviews/kmaffei.html Working concept] of triadic closure: book review of Duncan Watts' "Six Degrees: The Science of a Connected Age" at the ''Serendip'' (Bryn Mawr College) website. Retrieved on December 21, 2007.</ref> 这一性质过于极端,以至于它难以在规模较大、结构复杂的网络中被满足,然而在理解网络与网络预测等方面,它却是一种十分有用的对现实的简化。<ref name=Easley>Easley, D, & Kleinberg, J. (2010). Networks, crowds, and markets: reasoning about a highly connected world. Cornell, NY: Cambridge Univ Pr.</ref> |