In chapter 2, We study a nonautonomous SIS model with age structure.
第二章，提出了具有年龄结构和周期传染率的的SIS模型。
In the analysis of technology diffusion, we import classic infection model: sis model and SIR model.
在技术扩散分析中，引入经典的传染病模型：SIS模型和SIR模型。
The concluded results of the corresponding ordinary differential equations model are expanded to the present D-SIS model, it is of benefit to disease control.
该研究将相应常微分方程模型的研究结果推广到了偏微分方程D-SIS模型，对疾病的预防与控制具有实用参考价值。
An epidemic SIS model whose coefficient is almost periodic functions is studied. A sufficient condition of existence and uniqueness of positive periodic solution is obtained.
对系数是概周期函数的传染病s IS模型进行了研究，得到了概周期解存在惟一的一个充分条件。
An SIS epidemic model with standard incidence rate is investigated.
研究一类具有标准发生率的SIS传染病模型。
In this paper, we have studied a SIS epidemiological model with a nonlinear incidence rate and population dynamics in susceptible class.
本文研究了具有非线性接触率和易感类中具有种群动力学的SIS传染病模型的正不变集、平衡位置以及平衡位置的稳定性。
The influence of the vaccination to the spreading of disease is studied. Age-Structured SIS communicable disease model with proportional vaccination is formulated.
研究按比例对各年龄的易感者进行接种对传染病传播过程的影响，提出了具有年龄结构的SIS型传染病的接种模型。
In Chapter 1, an SIS epidemic model with staged treatment function is proposed where the disease-related death rate is negligible.
第一章主要研究了含有分段形式治疗函数且忽略疾病致死率的SIS传染病模型。
In this paper, the sis epidemic model with stage structure consisting immature and mature is considered. The threshold is founded which the epidemic will become endemic or die out.
讨论了具有阶段结构的SIS传染病模型，给出了传染病最终消除和成为地方病的阈值。
Objective: To investigate the way of the second period-treatment for mandible outmoded fracture on the ba-sis of model surgery.
目的：探讨在模型外科指导下，对下颌骨多发性骨折一期手术失败病例进行二期治疗。
Objective: To investigate the way of the second period-treatment for mandible outmoded fracture on the ba-sis of model surgery.
目的：探讨在模型外科指导下，对下颌骨多发性骨折一期手术失败病例进行二期治疗。
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