The asymptotical behavior of population models with diffusion is studied.
研究了一般的具有周期环境扩散种群模型的渐近性态。
They use statistical models designed to calculate so-called excess mortality that occurs during the period when influenza viruses are circulating widely in a given population.
所使用的统计模型旨在计算流感病毒在特定人群中广泛传播期间发生的所谓超额死亡率。
Unexpectedly, the most promising lead came from dusty old models of population genetics, raised from their resting place in undergraduate textbooks.
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。
This result directly contradicts models of population collapse from human overkill (blitzkrieg) or infectious diseases following the first human contact (hyperdisease).
这种结论直接与由人类过度捕杀或是与人类第一次接触后带来的传染性疾病造成群体崩溃的说法矛盾。
For example, some models assume that population size never changes.
比如说，有些模型假设种群规模永远不变。
Conclusion spatial semivariogram models of human population genetic structure can effectively reveal the spatial structure of the population genetic structure.
结论人类群体遗传空间结构异质性变异函数模型可以揭示人类群体遗传空间结构特征。
Population balance models are finding increasing application in the design, optimization and control of grinding circuits.
总体平衡模型在磨矿回略的设计和操作员优化及自动控制中的作用越来越大。
Many environment mathematical models are ordinary differential equations where time is considered only as its effect on population density.
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。
Therefore, establishing the stochastic models between the population dynamics and economic growth has some theoretical significance.
因此，建立人口动态与经济增长之间的随机模型具有重要的理论意义。
Study on urban population migration models.
城镇人口迁移模式研究。
The explanation and demonstration have been included in the mathematic models with the theory of population genetics.
用群体遗传学的理论对所建数学模型进行了解释和论证。
Surplus production models are among the main models for fish population dynamics.
剩余产量模型是鱼类种群动力学的主要模型之一。
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.
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。
Then regression of mathematical models is used to study the distribution of population and the evolution of spatial structure of Beijing Metropolitan Area.
继而，通过数学模型的回归研究北京都市区人口分布及空间结构的演化趋势。
The concept and fundamentals of Systemic conservation of Animal and Poultry Genetics Resources (SCAPGR) and mathematical models of genetic structure with conservation population were proposed.
本文提出了畜禽遗传资源系统保存的概念、基本思想及其群体遗传结构变化的数学模型。
Methods The autoregressive models of population, new cases and incidence rate for human brucellosis dynamics were set up.
方法分别建立人口布氏菌病新发病例和发病率的自回归模型。
The influence of the stochastic external environment upon the population dynamics system have never been considered in ordinary age-dependent system models.
对人口系统的讨论，通常的数学模型没有考虑外界环境对系统的影响。
The classical fish population dynamic models were largely on the basis of stable population behavior assumption.
经典的鱼类种群动态模型是以稳定的种群行为为基础的。
Virtual population analysis (VPA) is one of the classic models in fish stock assessment, and is one of the main models in calculating the total allowable catch (TAC).
实际种群分析法(VPA)是渔业资源评估的经典模型之一，也是总允许捕捞配额(TAC)计算的主要模型之一。
It evaluates social and economic effect of floating population. The author puts forward exploitation ways and management models of floating human resources in different regions in Kunming.
包括昆明市流动人口社会经济效应评估、不同类型区流动人力资源开发利用途径和不同类型区流动人力资源管理模式。
Based on the data of the death rate of population in a district of Wuhan and that of Canada's leopard cat, SETAR models have been developed and the limit cycles for both cases worked out respectively.
本文根据武汉市某区人口死亡率和加拿大山猫数据建立了SETAR模型，并作出了相应系统的极限环。
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.
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。
Statistics showed that the time-effect models are parabola functions with maximum values when the mussel population density ranges from 6.25 to 31.25 per cubic meter.
研究发现，当蚌密度在每立方米6.25个到每立方米31.25个的区间内，时效模型呈具有极大值的抛物线函数。
Population prediction models of the Formosan Landlocked salmon (Oncorhynchus masou formosanus).
台湾樱花钩吻鲑的族群预测模式。
Main published work included length frequency analysis, virtual population analysis, production models, and maximum sustainable yield of Qatari fishery.
主要研究成果包括体长分析，世代分析方法，产量模型和卡塔尔国渔业的最大持续产量。
Plant population demography mainly touches on diagrammatic models and transition matrix models.
种群统计学主要涉及图解模型和转移矩阵模型。
Plant population demography mainly touches on diagrammatic models and transition matrix models.
种群统计学主要涉及图解模型和转移矩阵模型。
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