age structure

In this paper , we study a nonautonomous SIS model with age structure.

研究具有年龄结构的非自治的SIS模型.

The age structure of most dominant species community is declining, and the community species composition unstable.

样地内多数优势种群的年龄结构为衰退型, 群落的种类组成不稳定.

The 3 rd, want appropriate to solve the problem of worker age structure with overall this locality.

第三, 要妥善解决本地总体的职工年龄结构问题.

Meanwhile, points for attention that whether the age structure is reasonable under intensive cultivation.

另外, 值得深思的是,在高度集约经营条件下,原有的竹龄结构模式是否还适应等.

In this paper we formulate an epidemic model with chronological age and infectious age structure.

本文根据流行病的传染过程和机理建立了具有年龄和病程结构的流行病模型.

For example the user age structure that the net swims is very young also.

例如网游的用户年龄结构也很年轻.

The population age structure is more reasonable, the existing reserve of human resources.

人口年龄结构较为合理, 现有、后备人力资源充足.

All 4 populations have opposite pyramid age structure, and few coning individuals, which is still decreasing.

所有四个野生种群的年龄结构均呈倒金字塔型,开花个体数少, 并且还在不断减少.

Age structure may also be represented by a survivorship curve.

存活曲线也可以反映年龄结构.

Age structure is a foundational base to study the population dynamics.

年龄结构是研究种群动态的重要基础.