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本词条由Ryan初步翻译，已由Alienxj审校。
{{redirect|Network hub|the Ethernet technology|Ethernet hub}}
{{redirect|Network hub|the Ethernet technology|Ethernet hub}}
In network science, a hub is a node with a number of links that greatly exceeds the average. Emergence of hubs is a consequence of a scale-free property of networks. While hubs cannot be observed in a random network, they are expected to emerge in scale-free networks. The uprise of hubs in scale-free networks is associated with power-law distribution. Hubs have a significant impact on the network topology. Hubs can be found in many real networks, such as Brain Network or Internet.
In network science, a hub is a node with a number of links that greatly exceeds the average. Emergence of hubs is a consequence of a scale-free property of networks. While hubs cannot be observed in a random network, they are expected to emerge in scale-free networks. The uprise of hubs in scale-free networks is associated with power-law distribution. Hubs have a significant impact on the network topology. Hubs can be found in many real networks, such as Brain Network or Internet.
在'''<font color="#ff8000">网络科学 Network Science</font>'''中，'''<font color="#ff8000">枢纽节点 Hub</font>'''是链接数大大超过平均值的节点。枢纽节点是'''<font color="#ff8000">无标度网络 Scale-Free Property of Networks</font>'''的重要特性。虽然在随机网络中不存在枢纽节点，但是它们却存在于无标度网络中。无标度网络中枢纽节点的涌现与'''<font color="#ff8000">幂律分布 Power-Law Distribution</font>'''有关，其对网络的拓扑结构有着重要的影响。枢纽节点可以在很多真实的网络中找到，比如大脑网络或者互联网。
在'''<font color="#ff8000">网络科学 Network Science</font>'''中，'''<font color="#ff8000">枢纽 Hub</font>'''指的是其链接数远超过平均值的节点。网络的'''<font color="#ff8000">无标度性质 Scale-Free Property</font>'''是枢纽出现的主要原因。<ref>[http://barabasi.com/networksciencebook/content/book_chapter_2.pdf Barabási, Albert-László. ''Network Science: Graph Theory''., p. 27]</ref> 虽然在随机网络中难以观察到枢纽，但它们却有望出现于无标度网络中。无标度网络中枢纽的出现与其'''<font color="#ff8000">幂律分布 Power-Law Distribution</font>'''的性质有关。枢纽对网络的拓扑结构有着重要的影响。我们可以在很多真实的网络中发现枢纽，比如大脑网络或者因特网。
[[File:Network representation of brain connectivity.JPG|thumb|right|
[[File:Network representation of brain connectivity.JPG|thumb|right|