Epidemic thresholds in a heterogenous population with competing strains  

作　　者：吴庆初 傅新楚 杨孟 

机构地区：[1]Department of Mathematics,Shanghai University [2]College of Mathematics and Information Science,Jiangxi Normal University

出　　处：《Chinese Physics B》2011年第4期384-390,共7页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 11072136);the Shanghai Leading Academic Discipline Project,China (Grant No. S30104)

摘　　要：Among many epidemic models, one epidemic disease may transmit with the existence of other pathogens or other strains from the same pathogen. In this paper, we consider the case where all of the strains obey the susceptible-infected- susceptible mechanism and compete with each other at the expense of common susceptible individuals. By using the heterogenous mean-field approach, we discuss the epidemic threshold for one of two strains. We confirm the existence of epidemic threshold in both finite and infinite populations subject to underlying epidemic transmission. Simulations in the Barabasi-Albert （BA） scale-free networks are in good agreement with the analytical results.Among many epidemic models, one epidemic disease may transmit with the existence of other pathogens or other strains from the same pathogen. In this paper, we consider the case where all of the strains obey the susceptible-infected- susceptible mechanism and compete with each other at the expense of common susceptible individuals. By using the heterogenous mean-field approach, we discuss the epidemic threshold for one of two strains. We confirm the existence of epidemic threshold in both finite and infinite populations subject to underlying epidemic transmission. Simulations in the Barabasi-Albert （BA） scale-free networks are in good agreement with the analytical results.

关 键 词：complex network epidemic threshold epidemic dynamics 

分 类 号：O242.1[理学—计算数学]