...PEST模型；波特五力模型 [gap=1291]Key words： sovereignty personality; overseas development of foreign insurers; the PEST model; Potter’s five forces model ..
基于1个网页-相关网页
The Web GIS of invasive pest risk assessment was developed integrated GIS and mathematical model.
按照专业模型与GIS的事例思路建立了外来有害生物风险分析地理信息系统。
According to the catastrophe rule of pest in agriculture the qualitative and quantitative catastrophe model was set up and the sudden change region was determined.
在农业病虫害突变规律的研究基础上，建立了定性与定量的尖角突变模型，确定了各病虫的突变区域。
We investigate the dynamic behaviors of a stage-structured pest population model with birth pulse and impulsive spraying pesticide at fixed time.
研究了一个具有阶段结构，脉冲生育及在固定时刻对其喷洒杀虫剂的害虫种群模型的动力学性质。
应用推荐