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在现实世界的很多现象中，都能够看到小世界属性，这包括网络中的导航菜单、食物网、电网、代谢处理网络(metabolite processing networks)、[https://en.wikipedia.org/wiki/Biological_neural_network 脑神经网络]、选民网络、电话呼叫图、社交影响网络等等。文化网络<ref name="a13">#" 'n [http://www.litnet.co.za/n-kwantifisering-van-kleinwereldsheid-in-afrikaanse-kultuurnetwerke-in-vergelyking-met-ander-komplekse-netwerke/ Kwantifisering van kleinwêreldsheid in Afrikaanse kultuurnetwerke in vergelyking met ander komplekse netwerke | LitNet]". LitNet. 2015-11-05. Retrieved 2017-02-27.</ref>与单词共现网络<ref name="a14">#"[http://www.litnet.co.za/die-statistiese-eienskappe-van-geskrewe-afrikaans-n-komplekse-netwerk/ Die statistiese eienskappe van geskrewe Afrikaans as 'n komplekse netwerk | LitNet]". LitNet. 2017-02-09. Retrieved 2017-02-27.</ref>也被证明是小世界网络。

在现实世界的很多现象中，都能够看到小世界属性，这包括网络中的导航菜单、食物网、电网、代谢处理网络 metabolite processing networks 、[https://en.wikipedia.org/wiki/Biological_neural_network 脑神经网络]、选民网络、电话呼叫图、社交影响网络等等。文化网络<ref name="a13">#" 'n [http://www.litnet.co.za/n-kwantifisering-van-kleinwereldsheid-in-afrikaanse-kultuurnetwerke-in-vergelyking-met-ander-komplekse-netwerke/ Kwantifisering van kleinwêreldsheid in Afrikaanse kultuurnetwerke in vergelyking met ander komplekse netwerke | LitNet]". LitNet. 2015-11-05. Retrieved 2017-02-27.</ref>与单词共现网络<ref name="a14">#"[http://www.litnet.co.za/die-statistiese-eienskappe-van-geskrewe-afrikaans-n-komplekse-netwerk/ Die statistiese eienskappe van geskrewe Afrikaans as 'n komplekse netwerk | LitNet]". LitNet. 2017-02-09. Retrieved 2017-02-27.</ref>也被证明是小世界网络。

相连的蛋白质网络同样具有小世界性质，例如遵从幂律的度分布。<ref name="a15">#Bork, P.; Jensen, LJ; von Mering, C.; Ramani, A.; Lee, I.; Marcotte, EM. (2004). "[http://marcottelab.org/paper-pdfs/cosb-review.pdf Protein interaction networks from yeast to human]" (PDF). Current Opinion in Structural Biology. 14 (3): 292–299. doi:10.1016/j.sbi.2004.05.003. PMID 15193308.</ref>类似地还有[https://en.wikipedia.org/wiki/Transcriptional_regulation 转录网络]，其节点为[https://en.wikipedia.org/wiki/Gene 基因]，如果某一个基因对另一个基因有上调或下调的遗传影响，且这些基因彼此相连，这一网络就具有小世界网络的性质。<ref name="a16">#Van Noort, V; Snel, B; Huynen, MA. (Mar 2004). "[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1299002 The yeast coexpression network has a small-world, scale-free architecture and can be explained by a simple model]". EMBO Rep. 5 (3): 280–4. doi:10.1038/sj.embor.7400090. PMC 1299002 Freely accessible. PMID 14968131.</ref>

相连的蛋白质网络同样具有小世界性质，例如遵从幂律的度分布。<ref name="a15">#Bork, P.; Jensen, LJ; von Mering, C.; Ramani, A.; Lee, I.; Marcotte, EM. (2004). "[http://marcottelab.org/paper-pdfs/cosb-review.pdf Protein interaction networks from yeast to human]" (PDF). Current Opinion in Structural Biology. 14 (3): 292–299. doi:10.1016/j.sbi.2004.05.003. PMID 15193308.</ref>类似地还有[https://en.wikipedia.org/wiki/Transcriptional_regulation 转录网络]，其节点为[https://en.wikipedia.org/wiki/Gene 基因]，如果某一个基因对另一个基因有上调或下调的遗传影响，且这些基因彼此相连，这一网络就具有小世界网络的性质。<ref name="a16">#Van Noort, V; Snel, B; Huynen, MA. (Mar 2004). "[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1299002 The yeast coexpression network has a small-world, scale-free architecture and can be explained by a simple model]". EMBO Rep. 5 (3): 280–4. doi:10.1038/sj.embor.7400090. PMC 1299002 Freely accessible. PMID 14968131.</ref>