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In this paper, we attempt to understand complex network
evolution from the underlying evolutionary relationship between
biological organisms. Firstly, we construct a Pfam domain interaction
network for each of the 470 completely sequenced organisms, and
therefore each organism is correlated with a specific Pfam domain
interaction network; secondly, we infer the evolutionary
relationship of these organisms with the nearest neighbour joining
method; thirdly, we use the evolutionary relationship between
organisms constructed in the second step as the evolutionary course
of the Pfam domain interaction network constructed in the first step.
This analysis of the evolutionary course shows: (i) there is
a conserved sub-network structure in network evolution; in this
sub-network, nodes with lower degree prefer to maintain their
connectivity invariant, and hubs tend to maintain their role as a hub
is attached preferentially to new added nodes; (ii) few nodes are
conserved as hubs; most of the other nodes are conserved as one
with very low degree; (iii) in the course of network evolution, new
nodes are added to the network either individually in most cases or
as clusters with relative high clustering coefficients in a very few
cases. 相似文献
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odgkin—Huxley方程的Hopf分岔的研究 总被引:1,自引:0,他引:1
数值计算发现Hodgkin-huxley(HH)方程中存在亚临界Hopf分岔。对HH方程进行具体分析,得到简化HH方程用规范型(normal form)理论对简化HH进行定一性分析,发现简化HH方程反映了HH方程的分岔性态。 相似文献
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跨越多个实际科学领域的合作网络与合作-竞争网络 总被引:2,自引:0,他引:2
简介跨越多个实际科学领域的合作网与合作-竞争网.在早期实证研究部分介绍对好莱坞演员合作网和科研论文合著网的最著名研究;在二分图的两种度及其分布,即项目大小分布和项目度分布部分中介绍美国RDP小组和中国扬州大学课题组进行的实证研究以及他们分别提出的合作网演化模型;在同类性与项目度分布的相关性部分介绍不赋边权和赋边权的同类性定义,以及对于同类性与项目度分布的相关性的实证与模型研究;在二分图投影的资源分配方法部分介绍最近提出的基于资源再分配观点的二分图投影及边权定义;在近期关于合作网络的实证研究部分介绍对于城市公交、铁路运输、科研项目、语言文字等系统的合作网络描述及相应的实证研究;在最后一部分,合作-竞争网络及其节点权描述部分中介绍对于企业竞争、影片市场、学生选课、图书借阅、水果要素等系统的合作-竞争网络网络描述及相应的实证研究.在文章后面列出了经过选择的44篇参考文献. 相似文献
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