非线性离散竞争系统的全局稳定性

考虑一类非线性离散的Lotka-Volterra竞争系统,通过构造适当的Lyapunov函数,得到了保证该系统全局渐近稳定的充分性条件,并给出该结果在一类二维竞争系统中的应用.     

批判医学人类学的历史与理论框架

回顾20世纪70年代以来逐步形成,并在现实社会问题研究中越来越彰显重要性的批判医学人类学的产生和发展,并解释了在批判医学人类学理论体系下的其核心概念,指出:在人类学的框架内,用批判的眼光解决医疗体制中所存在的问题是非常有意义的;在政治经济发展全球化的今天,致力于建立一个多元文化批判的完整体系可以促使人们更深刻地了解医疗和医疗护理。     

工业化初期墨西哥地方市政府决策之经济人类学研究

向城市贫困人口提供廉价的生活物资和基本服务是发展中国家面临的一个主要问题,尤其是在工业化的早期。从经济角度来讲,向这一群体提供服务是至关重要的,因为大部分的劳动力来自于这一群体,而劳动力是国家工业化的一个要素。从历史角度来看,向这一群体提供服务属于地方市政府的职责。因此,通过对地方政府决定的研究,可以找到与提供生活必需品政策相关的问题的最佳答案。工业化发展初期的墨西哥,是研究此类动态变化的理想之地。     

Affinity Solvents for Intensified Organics Extraction： Development Challenges and Prospects

Introduction In contrast to inorganics and metals processing, most organics extraction processes use classical organic sol-vents that utilize physical interactions with the solutes of interest to achieve the desired separation[1]. Clear examples are the e…     

Application of Method-of-Lines to Charging-Up Process in Pipelines with Entrapped Air

Introduction The initial charging-up process is an important opera-tion in an intermittent,undulating pipeline system.Re-cently,the charging-up process has received attention with the aim of predicting the effective duration of supply in different regions…     

Heat Transfer Enhancement Due to Marangoni Flow Around Moving Bubbles During Nucleate Boiling

Introduction Nucleate boiling has always been an important heat transfer mechanism in many fields, such as energy utilization, manufacturing processes, and chemical processing and nucleate boiling continues to find new applications in many new areas, such…     

Global warming： Take action or wait？

Of all the changes wrought by human activity, the buildup in our atmosphere of the greenhouse gases, carbon dioxide, methane and nitrous oxide, has gener- ated the most contentious debate. Environmentalists warn that in the absence of firm action, over th…     

Growth ages of ferromanganese crusts from the western and central Pacific： Comparison between nannofossil analysis and ^10Be dating

Based on results of nannofossil analysis and 10Be dating in ferromanganese crusts M1-1 and A1-1 (no nannofossils were found in it),from the western and central Pacific respectively,it is found that the crust growth ages from nannofossil biostrati-graphy agree well with those based on 10Be isotope analysis. Both crusts have three growth layers,and the oldest layer was deposited in Miocene at about 12.80 Ma. The maximum,minimum,and average growth rates of crust A1-1 (from the central Pacific) are 8.11,1.92 and 3.47 mm/Ma,and those of crust M1-1 (from the western Pacific) are 2.93,0.47,and 0.94 mm/Ma.     

矿石与材料发光光谱学

本书属于矿物物理领域，重点是矿物的发光光谱。本书使用的实验手段主要是激光激发矿物质和对其发射和散射结果进行时间分辨的探测。全书共11章。第1章简介，介绍了主要科学术语的定义以及激光诱导时间分辨技术和稳态发光等内容；第2章理论背景，解释了激发能的吸收、辐射跃迁等发光中的主要过程；第3章实验方法，描述了实验设备的主要部分;     

半导体物理

本书是一本教材，系统地介绍了半导体物理的理论知识。为了使学生能更好地理解和应用这些理论和概念，本书还对一些基于半导体的重要系统的原理进行了简单的解释。全书共分10章。第1章半导体简介，介绍了半导体的定义和重要性、半导体理论的基础和一维理想结晶固体的量子态；第2章理想半导体的量子态，重点介绍了三维半导体的量子态；第3章纯半导体的激发态和含杂质半导体的量子态；第4章均相半导体的统计学；第5章半导体中的迁移现象；第6章光效应；