報(bào)告題目：Why are there six degrees of separation in a social network?

報(bào)告人：Stefano Boccaletti 教授

主持人：管曙光 教授

報(bào)告時(shí)間：6月16日上午10:00

報(bào)告地點(diǎn)：閔行校區(qū)物理樓226報(bào)告廳

報(bào)告人簡介：

Stefano Boccaletti教授，歐洲科學(xué)院院士，意大利國家科學(xué)院復(fù)雜系統(tǒng)研究所常務(wù)研究主任，以色列特拉維夫大學(xué)名譽(yù)教授，以色列魏茲曼科學(xué)研究院訪問科學(xué)家主要從事復(fù)雜網(wǎng)絡(luò)、系統(tǒng)同步、非線性動(dòng)力學(xué)、大數(shù)據(jù)光電物理學(xué)、認(rèn)知神經(jīng)科學(xué)、混沌控制相關(guān)的基礎(chǔ)和交叉學(xué)科領(lǐng)域研究，在《Physics Reports》《Physical Review Letters》《Physical Review E》 《Science Advances》《PNAS》《Nature Physics》《Nature Communications》《Nature Scientific Reports》等國際SCI雜志發(fā)表論文402篇，總引用數(shù)超過34000次，H指數(shù)62i-10指數(shù)221，2006年發(fā)表在《Physics Reports》上的論文《Complex Networks: Structure and Dynamics》被引用超過12000次，并為該期刊年鑒上被引用次數(shù)最多的論文。

報(bào)告摘要：

The story coined the expression ‘six degrees of separation’ to reflect the idea that all people of the world are six or fewer social connections apart from each other. A clear explanation of the mechanisms through which social networks organize into ultra-small world states (where the diameter does not depend on the system size over several orders of magnitude) is, however, still missing. In my talk, I will show that the mechanism behind such observed regularity can be found in a dynamic evolution of the network. Therefore, evolutionary rules of the kind traditionally associated with human cooperation and altruism can in fact account also for the emergence of such a famous attribute of social networks.