arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0903.2997q-bio.PEq-bio.QM
收藏

随机传染率过程的信息几何与熵

Information geometry and entropy in a stochastic epidemic rate process

C. T. J. Dodson

摘要:

具有非齐次种群的流行病模型已被用于研究重大疫情,最近Britton和Lindenstrand \cite{BL}描述了潜伏期和传染性具有独立伽马分布的情况。他们发现,这些随机变量的变异性对流行病的增长率有相反的影响。潜伏期的变异性越大,该速率越高,但感染性的变异性越大,该速率就越低。在这里,我们通过使用McKay双变量伽马分布来扩展他们的结果,用于延迟和传染性的联合分布,恢复了上述可变性的影响,但允许可能的相关性。我们使用随机速率过程的方法来获得明确的解决方案的增长的流行病和发展的不均匀性和信息熵。我们得到了一个封闭的解析解的分布的未感染的个人的数量作为流行病的进展,并伴随着熵的衰减表达式的演变。McKay双变量伽马分布的家族具有易于处理的信息几何,其提供了一个框架,在该框架中,可以随着爆发的增长来研究分布的演变,并且具有用于定量跟踪进展的自然距离结构。

英文摘要:

Epidemic models with inhomogeneous populations have been used to study major outbreaks and recently Britton and Lindenstrand \cite{BL} described the case when latency and infectivity have independent gamma distributions. They found that variability in these random variables had opposite effects on the epidemic growth rate. That rate increased with greater variability in latency but decreased with greater variability in infectivity. Here we extend their result by using the McKay bivariate gamma distribution for the joint distribution of latency and infectivity, recovering the above effects of variability but allowing possible correlation. We use methods of stochastic rate processes to obtain explicit solutions for the growth of the epidemic and the evolution of the inhomogeneity and information entropy. We obtain a closed analytic solution to the evolution of the distribution of the number of uninfected individuals as the epidemic proceeds, and a concomitant expression for the decay of entropy. The family of McKay bivariate gamma distributions has a tractable information geometry which provides a framework in which the evolution of distributions can be studied as the outbreak grows, with a natural distance structure for quantitative tracking of progress.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑