历安毛子代枝大学 第一章：绪论 XIDIAN UNIVERSITY 5： 无标度网络网络模型的提出。1999年发表于Sciencel的“随机网络中标度的 涌现”，揭示了无标度网络产生的机理 Emergence of Scaling in Random Networks Albert-Laszlo Barabasi*and Reka Albert Systems as diverse as genetic networks or the World Wide Web are best described as networks with complex topology.A common property of many large networks is that the vertex connectivities follow a scale-free power-law distribution.This feature was found to be a consequence of two generic mech- anisms:(i)networks expand continuously by the addition of new vertices,and (ii)new vertices attach preferentially to sites that are already well connected. A model based on these two ingredients reproduces the observed stationary scale-free distributions,which indicates that the development of large networks is governed by robust self-organizing phenomena that go beyond the particulars of the individual systems. SCIENCE VOL 286 15 OCTOBER 19995：无标度网络网络模型的提出。1999年发表于 Science的“随机网络中标度的 涌现”，揭示了无标度网络产生的机理 第一章：绪论