一类SIR传染病模型的全局稳定性分析

讨论了一类具有接触率与总人口有关,免疫接种和垂直传染的SIR传染病模型.确定了各种平衡点的阈值,当阈值小于1时,无病平衡点是全局渐近稳定的;当阈值在一些情况下大于1时,地方平衡点是全局渐近稳定的.     

油样光谱分析临界值初探

考查分析了润滑油磨粒浓度监控诊断临界值问题，实险结果说明我国不宜直接套用国外浓度临界值的方法，提出了适合我国国情的浓度增长率的方法。     

关于人类环境传染模型正解的渐近性态

应用bootstrap技巧，讨论了人类环境传染模型正周期解的存在性、唯一性和一般时变解的渐近性。     

传染病人的心理护理

现代护理学越来越重视病人的心理护理，这就需要医护人员善于具体分析每个病人的心理状态，以便有针对性的对病人进行心理护理。因传染病人的特殊性，所以做好传染病人的心理护理显得尤为重要。     

干旱区生态移民的临界值理论曲线与驱动力构成

根据干旱区生态环境特点, 经对生态学、经济学等多学科相关问题的交叉综合研究, 并结合干旱区生态移民的实践经验, 提出了干旱区生态移民临界值的理论曲线. 结合这一理论曲线, 进一步从生态移民驱动力构成的自然行为角度和政府行为角度, 对生态移民理论进行探索, 并分析了生态移民的积极动力和消极动力, 指出了实施干旱区生态移民的时机和步骤. 所提出的理论曲线具有一定的创新性和应用性, 能为评价生态恶化程度提供量化方法和为科学实施生态移民工程提供理论依据.     

Theoretical critical value curve and driving force formation of ecological migration in the arid land

The features of the fragile eco-environment of the arid land decide that its capacity of disturbance-resistance is lower. The natural desert oases in the arid land are in mosaic patches distributed in a wide Gobi desert. The population distribution is greatly dependent on water resources. The population is characterized with dispersed distribution, simple production and living style, and poverty and remoteness. The reason why the ecological migrations are carried out lies in the ecological problems. ＂Ecological degradation＂ is the main driving force of the ecological migration. Then, the strength of the driving force depends on the degree of ecological degradation. Hence, whether to carry out ecological migration depends on the extent of ecological degradation. Theoretically, the critical value curve for calculating ecological migration in the arid land is put forward through comprehensive research of relative problems of ecology, economics etc., combined with the ecological migration experience in the arid land, and based on the features of the arid environment. In this article, with this curve, the theoretical research and some practice of the ecological migration have been done from the perspective of natural behavior and governmental behavior of the driving force formation of ecological migration. It analyses the active driving force （factors） and negative forces （factors）, and points out the timing and steps of implementing the ecological migration in the arid land. The theoretical curve embodies certain originality and applicability, which provides a quantitative method for evaluating the degree of ecological degradation and the theoretical base for implementing ecological migration projects.     

GLOBAL ASYMPTOTIC STABLE ERADICATION FOR THE SIV EPIDEMIC MODEL WITH IMPULSIVE VACCINATION AND INFECTION-AGE

We study the application of a pulse vaccination strategy to eradicate the slowly progressingdiseases that have infectiousness in latent period.We derive the condition in which eradication solutionis a global attractor,this condition depends on pulse vaccination proportion p.We also obtain thecondition of the global asymptotic stability of the solution.The condition shows that large enoughpulse vaccination proportion and relatively small interpulse time lead to the eradication of the diseases.Moreover the results of the theoretical study might be instructive to the epidemiology of HIV.