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.
討論森林發展系統的一類非線性林齡麪積結搆的半離散模型，給出了非線性半離散系統穩定的一些充分條件。
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.
建立了一類新的帶有脈沖接種的類年齡結搆SEIR流行病模型，竝考慮其具有非線性傳染率。