Epidemic process

Quantitative Studies on Key Links of Epidemic Process of Brown Spot of Tobacco

烟草赤星病流行过程重要环节的定量研究

In 68 % outbreak spots , the epidemic process showed double peak or multiple peak model .

68%的暴发点，流行过程呈现双峰或多峰型。

A preliminary quantitative study on key links of epidemic process of corn northern leaf blight ⅳ . the effects of growth stage , fertility and varieties on the components of resistance of corn northern leaf blight

玉米大斑病流行过程重要环节的初步定量研究&Ⅳ.玉米生育期、肥力和品种对大斑病抗性组分的影响

Objective The present investigation was intended to explore the clinical characteristics and epidemic process of mild acute respiratory infection in the city of Dongtai in order to provide a scientific basis for the prevention of spread of the disease .

目的分析东台市一起轻型急性呼吸道感染症疫情的临床特点和流行过程，为疾控工作提供科学依据。

The present paper is based on the key stages in epidemic process of Tobacco Wildfire Disease Caused by the bacteria Pseudomonas syringae pv tabaci these bacteria proliferate in the tobacco plants and have been soaked out to the plant surface by rain and dew were first quantitatively studied .

对烟草野火病流行过程中重要环节&野火病菌在烟草病斑中数量消长及野火病菌经雨、结露浸出到烟草植株体表的数量动态进行了初步定量研究。

There are two spreading processes included in the thesis , the spreading process of epidemic and the spreading process of short message .

本文的传播过程包含了两种传播过程，传染病传播过程和手机短信息传播过程。

The epidemic rule of PVY was tested for fitting with several models , and Gompertz model fitted best for epidemic process in a short term . A model of the relationship between epidemic rate and the number of flying aphids was also created .

选用几种模型对PVY的流行规律进行拟合检验，确定Gompertz模型为短期流行过程的最优拟合方程，并建立了流行速率与有翅蚜量关系的模型。