基本解釋[數(shù)學(xué)]類年齡結(jié)構(gòu)英漢例句雙語例句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(fā)展系統(tǒng)的一類非線性林齡面積結(jié)構(gòu)的半離散模型，給出了非線性半離散系統(tǒng)穩(wěn)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(jié)構(gòu)SEIR流行病模型，并考慮其具有非線性傳染率。class age-structure更多例句詞組短語短語age -class structure 年齡結(jié)構(gòu)Dynamic of age -class structure 齡級結(jié)構(gòu)動態(tài)class age-structure更多詞組專業(yè)釋義數(shù)學(xué)類年齡結(jié)構(gòu)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，建立了一類新的帶有脈沖接種的類年齡結(jié)構(gòu)SEIR流行病模型，并考慮其具有非線性傳染率。 該模型既含有常微分方程，又含有偏微分方程。