网络的度：whole network connectivity (degree)，节点度是指和该节点相关联的边的条数，又称关联度。 特别地，对于有向图， 节点的入度 是指进入该节点的边的条数； 节点的出度是指从该节点出发的边的条数。
intramodular connectivity：Intramodular connectivity measures how connected, or co-expressed, a given gene is with respect to the genes of a particular module. Thus, intramodular connectivity is also the connectivity in the subnetwork defined by the module. The intramodular connectivity may be interpreted as a measure of module membership.
topological overlap：Topological overlap can serve as an important filter to counter the effects of spurious or missing connections between network nodes.
clustering coefficient：a measure of the degree to which nodes in a graph tend to cluster together.
density：The mean adjacency (connection strength) among all nodes in the network.
Networks analysis bioinformatics