The optimal population density x* of the fish and the optimal harvest rate h*(t) have keen derived.
进一步讨论了在可变价格和可变成本下最大值原理在渔业最优控制中的应用,推导出了鱼群的最优种群密度x*和最优收获率h*(t)。
Choosing the maximum periodic biomass yield as the manage- ment objective,we investigate the optimal harvesting policies for periodic Gompertz ecosystem with impulsive harvest.
在单位收获努力量假设下,以最大可持续收获量为管理目标,确定了线性收获下的最优收获策略,获得了最优收获努力量、最大可持续收获及相应的最优种群水平的显示表达式,为自然资源的开发和利用提供了理论依据。
In this paper, we investigate the optimal harvesting problem for a class of linear time-dependent population system with diffusion,prove the existence of the optimal harvesting control, and obtain the necessary condition of optimality and the uniqueness of the optimal control.
研究了一类线性时变种群扩散系统的最优收获问题 ,证明了最优收获控制的存在性 ,并且获得了最优控制的惟一性和应满足的必要条
Global dynamic state and optimal harvesting effort are obtained.
研究捕食者带阶段结构的可再生资源模型,得到了全局动力性态和最优收获努力度。
Qualitative analysis of Holling Ⅱ model with harvesting rates for preys and predators;
两种群都有收获率的HollingⅡ类模型的定性分析
Asymptotic behavior of the lotka-volterra diffusive system with constant harvesting rate;
具常数收获率的L—V扩散系统的渐近性质
Qualitative Analysis of HollingⅢModel with Harvesting Rates for Preys and Predators
两种群都有收获率的HollingⅢ类模型的定性分析
By checking residual calf serum contents, safety, potency and harvest recovery of purifying rabies vaccine, the methods mentioned above were screened.
对疫苗的残余牛血清含量、效力、收获率和安全性进行检测 ,优化和建立了精制地鼠肾细胞狂犬病疫苗纯化工
Existence of Optimal Harvesting Control for a Class of Time-Varying Population System
时变种群系统最优收获控制的存在性
Optimal Harvesting for a Population System Based on Age-Structure
基于年龄结构的种群系统的最优收获控制
Optimal Harvesting for Three Competing Species With Age-dependent and Diffusion
具有扩散和年龄结构竞争种群的最优收获(英文)
Optimal Harvesting Policy for a Single-species Growth Model with Three-stages Structure;
一类具三阶段结构的单种群模型的最优收获策略
Acquirement of Fuzzy Profit Rate and Decision for Optimal Portfolio
模糊收益率的获取及最优投资组合决策
She has the most to gain.
她可以获得最多的收益
The purpose of the combination of universities aims at conducting a first arte dispositon of higher educational resources of our country and gaining the largest scale to profit.
高校合并的目的是要实现我国高等教育资源的优化配置 ,获得最大的规模收益。
A system used to allocate a scarce commodity, such as food, only to those capable of deriving the greatest benefit from it.
优先分配一种将有限的物资，如食物，分配给那些能从中获取最大收益的人的制度
minimum tax on tax preference
税收优惠的最低税额
Autumn is the best season to get pumpkins.
秋天是收获南瓜最好的季节。
Dark Winter was a productive, virtual worst case.
暗冬是一个有收获的，真实的最糟案例。
The best archer would be awarded a golden arrow.
最优秀的弓箭手将获得一只金箭。
Achieving Total Optimum Profits by the Improvement of Supply Chain Coordination
增进供应链合作,获取整体最优效益
Study on Optimum Periodic Catching Problem of Species with Allee Effect
具有Allee效应种群的最优周期捕获问题
Study for Optimum Parameters Digital Nuclear Spectrum System
参数最优化数字核能谱获取系统研究
The weight of seeds of 1 and 2step branch,accounted for 45% and 38%of total weight respectively.
1级、2级分枝种子收获量最多 ,分别为种子收获总量的 45 %和 38%。
Providing most effective sales planning, concern on highest ROI 。
提供最有效的销售计划，以获取最高的投资收益。
The team that has the highest number of round wins is the winner.
获得最高优胜率的队伍就是最后的胜者！！