In this paper, a discrete stage - structured epidemical model is proposed and studied.
本文主要讨论了离散的阶段结构传染病模型.
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OBJECTIVE To explore the administration measures of air condition usage in SARS epidemical period.
目的研究传染性非典型肺炎流行期间综合性医院空调设施的管理.
catching,
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