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age structure 年龄构成；年龄分布

## age structure

• [统计] 年龄构成；年龄分布

### 网络释义专业释义

年龄结构

Microsoft Word - 徐志兰.DOC 关键词：年龄结构；人口动力学；最优控制；种群模型； [gap=10121]Key Words: Age-structure; Population dynamics; Optimal control; Population model

class age-structure 类年龄结构

Age-sex structure 年龄性别结构

更多收起网络短语
• 年龄结构 - 引用次数：5

The age-structure is similar with the DBH-class distribution and high-class distribution for three species.

3物种的种群年龄结构与胸径级结构、高度级结构相吻合。

参考来源 - 天童常绿阔叶林米槠—木荷群落历史动态及干扰事件的重建
• 年龄结构 - 引用次数：3

In chapter two, we establish a kind of new class age-structure SEIR epidemic model with impulsive vaccination and nonlinear infectivity, which contains ODEs and PDEs at the same time.

第二章，建立了一类新的带有脉冲接种的类年龄结构SEIR流行病模型，并考虑其具有非线性传染率。 该模型既含有常微分方程，又含有偏微分方程。

参考来源 - 传染病模型和脉冲微分系统的动力学研究

·2,447,543篇论文数据，部分数据来源于NoteExpress

### 双语例句权威例句

• And the age-structure of sport talents is appropriate.

体育人才整体年龄结构较为合理

• The optimal control problem of linear population dynamic system with age-structure in periodic environment was investigated.

周期环境研究一类具有年龄结构种群线性动力系统控制问题

• This paper discussed a class of nonlinear semi-discrete age-structure model of forest evolution system, and we gave the several sufficiency conditions for system stability.

讨论森林发展系统一类非线性林龄面积结构离散模型给出非线性半离散系统稳定一些充分条件

• Its age may help explain the structure's main design flaw--inadequate insulation between the upper and lower floors.

FORBES: Magazine Article

• In the past we talked about "dual use" military-civilian technologies, but truth be told, not much of what's in a bomb migrates back to a BMW. However, the money flowing into military and homeland infra-structure security will leverage revolutionary technologies and materials of the new digital age.

FORBES: The Security-Industrial Complex

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