Using a dynamic economic model with a life_cycle hypothesis, this paper examines the effect of population change on economy.
本文用一个带生命周期假说的经济动态模型全面考察了人口变动对经济的影响。
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。
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