In chapter 3 , we give out lotka - volterra prey - predator model with density constraint and get the optimal harvesting policy that takes the maximum net rent as management purpose , when harvesting ability are limited or unlimited 第三章給出了有密度制約的lotka - volterra捕食者-食餌系統(tǒng),當(dāng)總捕獲能力有限和無限時(shí),以最大純收益為管理目標(biāo)的最優(yōu)捕獲策略。
The paper is organized as follows : in chapter 2 , we give out models of lotka - voiterra prey - predator system without that density constraint and get the optimal harvesting policy that takes the maximum net rent as management purpose , when harvesting ability are limited or unlimited 本文具體安排如下:第二章給出了無密度制約的lotka - volterra捕食者-食餌系統(tǒng),當(dāng)總捕獲能力有限和無限時(shí),以最大純收益為管理目標(biāo)的最優(yōu)捕獲策略。
In the paper , we propose several different harvesting patterns , introduce price and cost factor and employ qualitative analysis method to the lotka - voterra prey - predator system with density constraint and without density constraint . we choose the maximum net rent as the management objective so as to get the optimal harvesting policy and have stronger directive meaning to real - life 本文對(duì)無密度制約和有密度制約的lotka - volterra捕食者-食餌系統(tǒng),提出了幾種不同的捕獲模式,引入了價(jià)格成本因素,運(yùn)用定性分析的方法,考慮了以最大純收益為管理目標(biāo)的最優(yōu)捕獲策略,以期使其對(duì)現(xiàn)實(shí)有更強(qiáng)的指導(dǎo)意義。