In this paper we formulate an epidemic model with chronological age and infectious age structure.
本文根据流行病的传染过程和机理建立了具有年龄和病程结构的流行病模型。
In order to accurately simulate the labor age structure, this paper USES the OLG method and establishes a recursion model that relatively impairs the age changes.
为了更准确地模拟职工年龄结构的变化，本文采用OLG方法，建立年龄变化相对稳定的职工人数递推模型。
Consistence between isotopic model age of lead ore and intrusion age of quartz porphyry shows close relations among structure movements, magmatism and mineralization in Stage of Yenshan.
矿石铅同位素模式年龄和石英斑岩体侵入年龄的一致性反映燕山期构造、岩浆和成矿作用的密切关系。
Then, we examine the consumption function model that includes the population age structure variables which is the population of all ages the proportion of the total population share.
然后，我们对分别含有人口年龄结构变量，即各年龄段人口所占总人口的比重的四个消费函数模型进行了检验。
First, we examined consumption function model which doesn't contain the age structure of population variables and we conduct a brief analysis.
首先，我们检验了不含人口年龄结构变量的消费函数模型，并对结果进行了简要的分析。
The age structure of rhizome is an increasing model at length and weight at the end of growing season.
在生长季末，种群中根茎在累计长度和重量上均为增长型年龄结构。
In chapter 2, We study a nonautonomous SIS model with age structure.
第二章，提出了具有年龄结构和周期传染率的的SIS模型。
The environmental tritium and zoning-mixing model is used to assess its age and reserve. According to the hydrogeological structure and groundwater age, the water is divided into "old" and "new".
并应用环境氚和分带-混合模型佔算地下水年龄和储存量根据水文地质构造条件和地下水年龄，该岩溶水被分为老水和新水。
The environmental tritium and zoning-mixing model is used to assess its age and reserve. According to the hydrogeological structure and groundwater age, the water is divided into "old" and "new".
并应用环境氚和分带-混合模型佔算地下水年龄和储存量根据水文地质构造条件和地下水年龄，该岩溶水被分为老水和新水。
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