class age-structure

常见例句

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.
讨论森林发展系统的一类非线性林龄面积结构的半离散模型，给出了非线性半离散系统稳定的一些充分条件。
In this paper, 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.
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。