By taxing about some over-exploitation populations how to restore optimal population level is moderately studied.
对系统某些种群因捕获造成过度开发，如何通过征税恢复最优种群水平作了适当的研究；
When people did not enjoy long retirements and population growth was rapid, the optimal amount of government debt was zero.
过去的人们不能享受长时间退休，人口又出现迅速的增长，那时国债的最优化数额就是零了。
In this paper, the existence of the optimal harvesting control for a class of non-linear population system is proved.
研究了一类半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。
Finally, the patient population selected may not have been optimal for a trial of botulinum toxin for chronic tension-type headache.
最后，选择的人可能不是作为肉毒素治疗的最佳慢性紧张型头痛的患者。
During preventing and controlling AIDS, teenagers were optimal target population all over the world. School health education was the important measure and strategy for preventing AIDS.
在艾滋病的预防控制中，世界各国都将青少年作为健康教育的最佳目标人群，将学校健康教育作为最重要的手段和有效策略。
This paper discusses the problem of the optimal harvesting control problem for a semilinear age-dependent population diffusion system.
研究了一类半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。
In this paper, an elitism-based PBIL algorithm which learns the selected best solutions in current population and the optimal solution found so far in the algorithm at same time is proposed.
在本文中，精英主义为基础的的PBIL算法学习选定的最佳解决方案，在目前的人口和最佳的解决方案迄今所发现的在同一时间的算法被提出。
HLA population genetics data could be used to evaluate optimal pool size and composition.
HLA群体遗传学资料有助于决定骨髓库的最适大小及其供者成员的组成。
Meanwhile, to solve optimal reduction quickly, GEP-ARRS implements dynamic population creation strategy to reduce gene length of GEP constantly in order to accelerate solution efficiency of GEP.
为了更快地求解出最优约简，GEP - ARRS算法利用动态种群生成策略，不断缩小GEP基因长度，加快GEP算法的求解速度。
The system model can provide on optimal decision strategy to effectively control PSB population, which contains measures of agricultural control, biological control and chemical control.
建立的系统模型能够提供包括农业防治、生物防治和化学防治措施在内的、对三化螟种群实施有效管理的最优决策方案。
By using the variation assimilation method and the optimal control method, theoretical analyses of the maximum population capacity and the inherent growth rate for the population model is presented.
研究人口的阻滞增长模型，采用资料变分同化方法及最优控制的技巧，从理论上对模型中的最大人口容量和固有增长率进行最优确。
The optimal harvesting problem for a semi-linear age-dependent time-varying population system is discussed.
讨论了年龄相关的半线性时变种群系统的最优捕获控制问题。
The present paper is concerned with the optimal control problem for an improved nonlinear age-dependent population dynamics.
研究某一类改进的关于年龄结构的非线性种群系统的最优控制问题。
In this paper, the optimal distributed control problems for a class of age-dependent non-linear population diffusion system with final state observation are studied.
讨论了一类具终端观测且与年龄相关的非线性时变种群扩散系统的最优分布控制问题。
The optimal control theory is used to study the accumulation rate and the population growth rate.
利用最优化原理研究了该系统的积累率和人口自然增长率。
The optimal control problem of linear population dynamic system with age-structure in periodic environment was investigated.
在周期环境下，研究一类具有年龄结构种群线性动力系统的最优控制问题。
This paper discusses the optimal distributed control problem for time-varying population system with spatial diffusion. By J.
讨论了一类时变种群扩散系统的最优分布控制问题，利用J。
Also, the species and population of pollinating insects were found to be the most optimal in the fields of mixed alfalfa and sainfoin.
苜蓿——红豆草混播田内传粉昆虫的种类多，且种群数量最高。
Under simple random sampling scheme without replacement and unknown proportion of population possessing neutral attribute, the optimal allocation of sizes of two sub-samples is given.
对简单随机不放回抽样，在总体非敏感属性个体比例未知的情况下，给出了两个子样本容量的最优配置。
In the second chapter, the problem of the optimal control for a class of non-linear population dynamics system with age-dependent is discussed.
第二部分讨论了一类具有年龄分布的非线性种群系统的最优控制问题。
It can promote statistic schema to converting into the schema of approximate optimal solution and the global searching performance of population can be improved effectively.
它能够促进统计模式向期望模式收敛，提高算法的搜索性能。
It can promote statistic schema to converting into the schema of approximate optimal solution and the global searching performance of population can be improved effectively.
它能够促进统计模式向期望模式收敛，提高算法的搜索性能。
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