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disease_spread:cv19的python建模
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2021-02-11
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COVID病例预测 在撰写本文时,由于COVID-19仍然在英国肆虐,几乎所有人口都处于严密的封锁之下。 该项目旨在预测可能会逐渐安全地放松旅行限制的大概日期。 该项目将英国COVID19每日病案率I(t)建模为以下形式的指数过程 1: 将参考日病案率I 0和生长常数m作为要建模的参数。 假设一旦每日病例下降到每天1000个新病例的任意阈值以下,锁定就会神奇地结束。 每日个案数据 这是可公开访问的英国政府数据源,为 。 可以在找到“标本案例”数据的机器可读,可代码集成的api调用。 R的派生 公式1等效于以下关系式,其中包含指数增长问题的再生因子R公式,其中 2: 实际上,一个人在整个疾病中不太可能具有同等的感染力,并且会表现出随时间变化的“传染性”曲线。 在这里可以忽略这一点,并假设一个统一的传染期τ= 14天,在此期间,一个人同样有可能传播该疾病。 实际上,这假设是大礼帽(或
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