研究了一般的具有周期环境扩散种群模型的渐近性态。
The asymptotical behavior of population models with diffusion is studied.
对一类有限空间年龄结构种群模型提出了一种数值方法。
A numerical method is studied for an age-structured population model with space-limited recruitment.
研究表明，种群个体分布格局为随机分布，种群模型属稳定增长型。
The results indicated that the distribution pattern of population individuals was random distribution pattern, and the population model was stable growth-oriented.
这就为应用生态学最著名的种群模型来研究其动力学行为奠定了基础。
So it provides research basis on dynamics behavior by using the most famous population model in ecology.
本文研究一类随着食物量的增加捕食者捕食速度的变化率起变化的种群模型。
In this paper, the population model which the velocity of the preying rate of the predator population changes when quantities of the prey population increase is concerned.
所以，除非它确实是简单的(一个猎物一个资源种群模型)否则随机建立模型是行不通的。
So build a model at random and, unless it's really simple (a one-prey-one-resource population model) it won't work.
对具有阶段结构的单种群模型实施了三种诱导控制，分别找到了相应的诱导控制区域。
Three different induction control are exerted on a single-species model with stage structure. The corresponding induction control domains are got.
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。
We investigate the dynamic behaviors of a stage-structured pest population model with birth pulse and impulsive spraying pesticide at fixed time.
通过不同的状态反馈控制研究了一个二维种群模型的永久持续生存问题，得到一些使被研究系统永久持续生存的充分条件。
The permanence of a two - species model are investigated by different state-feedback controls. Some sufficient conditions which make the model in question permanent are obtained.
出人意料的是，从大学本科生的教科书里，挖出的一些种群遗传学的尘封已久的旧模型，居然最有希望荣登谜底。
Unexpectedly, the most promising lead came from dusty old models of population genetics, raised from their resting place in undergraduate textbooks.
果然，就在模型确认的地区，蜥蜴种群正在消失。
Sure enough, populations of lizards were vanishing in just the places the model had identified.
他目前的研究范围从研究鲑鱼的动态系统和鳕鱼种群数量到建造植物和动物物种应对全球气候变化的模型。
His current studies range from researching the dynamics of salmon andcod populations to modeling plant and animal species' response toglobal climate change.
他目前的研究范围从研究鲑鱼的动态系统和鳕鱼种群数量到建造植物和动物物种应对全球气候变化的模型。
His current studies range from researching the dynamics of salmon and cod populations to modeling plant and animal species' response to global climate change.
出于数学运算纯粹性的要求，这些模型都得把种群规模假设为无穷大。
For reasons of mathematical purity, they all assumed an infinite population size.
比如说，有些模型假设种群规模永远不变。
For example, some models assume that population size never changes.
提出并研究了一类具有脉冲干扰和混合功能反应的三种群捕食链模型。
A food chain model of three species with impulsive perturbations and mixed functional response is proposed and studied.
建立了生物种群在污染环境中的一个线性生灭过程模型。
We establish a linear birth and death process model of a population in polluted environment.
许多环境数学模型是用常微分方程表示的，它只考虑了时间对种群密度的影响。
Many environment mathematical models are ordinary differential equations where time is considered only as its effect on population density.
以往关于生物种群增长的数学模型多是用微分方程和概率极限定理的方法来推导的。
Differential equation and probability limit theorem have been widely used in the mathematical model of biological population growth.
研究了两种群在偏害共生作用下的数学模型，分析了系统各平衡点的稳定性。
This paper deals with the mathematics model of two populations amensalism symbiosis and the stability of all equilibrium points in the system.
本文较为详细地介绍了我国啮齿动物种群生态学近20多年的理论探索、预测模型和应用研究的最新进展。
Presented was the introduction to the latest advances in theoretical approaches, predictive models and applied research in relation to rodents population ecology in China over past 20 years.
常微模型只考虑时间因素对种群密度的影响。
Time is only considered as the effect on population density in ordinary model.
我们的实验结果表明使用离散逻辑斯蒂模型来控制种群规模的VPGA能够比其他从微观算子上改进的遗传算法更加高效省时。
Experimental results show that VPGA using logistic model population size is more efficient and requires less computation time than other modified GAs which only improve the GA operations.
目的寻求种群生长的数学模型。
结果建立了描述种群生长的非线性差分方程模型。
RESULTS Model of nonlinear difference equation that describes the growth of population has been established.
利用常微分方程定性理论的方法讨论了价格成本变化的单种群经济捕获模型。
Using method of qualitative theory of ordinary differential equation, studies economic harvesting model with variable price and cost for a single population.
通过模型比较发现粗粒度模型以其较小的通信开销和对种群多样化，获得了最广泛的应用。
Through comparing these models, it is shown that coarse-grained model is more widely applied for its little communication overhead and its diversity of population than other models.
在第二章，我们研究了密度依赖生育脉冲对单种群阶段结构离散模型的动力学行为的影响。
Firstly, we propose and study the single-species discrete population model with stage structure and birth pulses.
建立天敌胁迫下食饵种群动态模型的参数估计方法。
The paper gave the way to estimate parameter of the prey population dynamical model under natural enemy.
经实测资料验证，笔者提出的模型在拟合光皮桦种群自然稀疏过程中，均具有较高的可信度。
According to the verified data, the model presented in this paper characterizes its higher credibility in the process of natural thinning of Betla Luminifera population.
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