Schaffer W M, Kot M
J Theor Biol. 1985 Jan 21;112(2):403-27. doi: 10.1016/s0022-5193(85)80294-0.
The incidence of measles in New York City and Baltimore was studied using recently developed techniques in nonlinear dynamics. The data, monthly case reports for the years 1928-1963, suggest almost two dimensional, chaotic flows whose essential attributes are captured by one dimensional, unimodal maps. The effects of noise, inevitable in ecological and epidemiological systems are discussed.
利用非线性动力学中最近开发的技术，对纽约市和巴尔的摩的麻疹发病率进行了研究。数据为1928年至1963年的月度病例报告，显示出几乎二维的混沌流，其基本特征由一维单峰映射捕获。文中讨论了生态和流行病学系统中不可避免的噪声影响。
