二种群系统线性变动且趋于平衡点的一个充分条件     

肖辉成 《宜宾学院学报》2004,4(6):155-156

对于二种群生物系统方程x′=x (1 -x-αy) ,y′=y (1 - βx - y)我们给出了二种群共同线性增长或减少 ,最终达到平衡点的一个充分条件  相似文献   

河北省高新技术产业评价指标体系的构建研究     

王翠霞  马丽  高保中 《廊坊师范学院学报(自然科学版)》2012,12(3):59-61

在分析影响河北省高新技术产业发展主要因素的因果关系基础上,依据高新技术产业评价指标体系建立的原则,构建了高新技术产业的数学模型和评价指标体系,从产业投入、产业产出、产业技术创新能力、产业政策环境、科技人力资源的投入力度5个方面分析评价河北省高新技术产业的发展水平,旨在为加速发展河北省高新技术产业提供理论支撑。  相似文献   

某图书馆消防设计理念探讨     

尹学英  范一鸣 《宜春学院学报》2012,34(4):51-52,147

某图书馆设计采用了室内外消火栓灭火系统、闭式自动喷水灭火系统、大空间消防水炮灭火系统。重点介绍了消火栓灭火系统、细水雾、大空间消防水炮灭火系统的选型,同时对消防设计中遇到的问题及解决方法进行了探讨。  相似文献   

Mic Check: Occupy Wall Street and the Space of Audition     

Lilian Radovac 《传播与批判/文化研究》2014,11(1):34-41

As used by Occupy Wall Street, the human microphone played a central role in the formation of an auditory space that was animated by the principles of direct democracy that guided the movement. However, the practice also allowed the occupiers to confront and subvert the monopoly on amplified public speech that the government of the City of New York had possessed for nearly eighty years. This paper presents a brief history and analysis of the city's regulation of sound devices, locating the human microphone in a larger struggle over the rights to public speech and assembly.  相似文献   

Perceptions of parental substance use disorders in cross-system collaboration among child welfare,alcohol and other drugs,and dependency court organizations     

Amy S. He  Dorian E. Traube  Nancy K. Young 《Child abuse & neglect》2014

Cross-system collaboration among child welfare (CW), alcohol and other drugs (AOD), and court organizations shows promise in addressing the many needs of CW-involved families experiencing parental substance use disorders (SUDs). Research has suggested that differing perceptions of parents with SUDs among staff in these organizations may hinder the collaborative process. Using a sequential explanatory mixed-method approach, this study explored staff perceptions of parental SUDs among CW, AOD, and court organizations. Logistic regression analyses indicated that, compared to CW respondents, AOD respondents were: (a) less likely to believe that parents could provide effective parenting; (b) more likely to believe that abstinence should be a criterion for reunification; (c) more likely to agree that parents should receive jail time as a consequence for noncompliance with court orders; and (d) more likely to believe that parents could succeed in treatment. Thematic analyses of these focal areas identified two core themes (focus on the primary client and mandated time frames for permanency), as well as multiple subthemes, that provided a nuanced understanding of differing perceptions on these matters. Suggestions for the development of anticipatory cross-system training and practices and implications for policy evaluation are discussed.  相似文献   

Engagement as Co-Generative Theorizing     

Stanley Deetz 《Journal of Applied Communication Research》2013,41(3):289-297

To meet current and ever shifting problems people continually need new and better ways to attend to, talk about, and respond in the world. All communities can have an impoverished language for talking about human interaction and making decisions in times of fundamental and rapid change. Three current impoverishments are discussed. Engaged scholarship using co-generative theorizing can initiate productive conversations enriching the languages of both scholarly and everyday life communities.  相似文献   

“一国两制”：马克思主义学说与中国特色社会主义道路的双重逻辑     

祝小茗 《桂林师范高等专科学校学报》2013,27(3):29-32

“一国两制”的实践发展史,也是一部马克思主义与中国特色社会主义道路相结合的理论探索史。16年的伟大实践积累了十分宝贵的经验,坚定了中国特色社会主义道路的理论自信与制度自信。因此,对“一国两制”基本方针的认识与评价,必须从国情与时代的发展中来探寻演进的逻辑。它的成功体现了我党在处理国家内部问题时坚持原则性与灵活性的统一,适应了生产力与生产关系的发展规律,用实践丰富与拓展了马克思主义国家学说在中国的当代论域。  相似文献   

《立体构成》课程教学的改革与探索     

赵国平  苏毅超 《广州广播电视大学学报》2008,8(2):65-68

成人高校的立体构成教育,大多数情况下兼具有基础教育和高等教育双重性质;以学生自主学习为主的教学模式,未必适用于成人高校的立体构成教学。本文在分析成人高校的学生特点和立体构成的课程特点的基础上,提出建立适合成人高校特点的、复合式的“一课两制”教学模式,积极开展全方位、多层次的互动式教学,以适应成人高校立体构成课程教学的特殊需要。  相似文献   

资源系统工程的研究与应用   总被引：2，自引：1，他引：1  

陶建格  薛惠锋  卢亚丽  董会忠  刘春江 《资源科学》2009,31(2):336-342

本文从资源定义出发,提出资源系统是指在一定区域内能够产生经济价值的、以提高人类当前和将来福利因素和条件的复杂系统。资源系统工程是对资源系统进行合理规划、设计和运行管理的一门交叉学科。研究分析认为：资源系统工程的理论基础是系统工程理论、系统工程技术和资源科学,研究的主要内容为资源系统规律、资源开发利用、资源协调控制,并初步确定了资源系统工程研究的方法论和学科体系。文章最后指出资源生态学、资源信息学的研究、资源系统定量分析,以及现代工程技术和方法的采用是资源系统工程研究的重点方向。资源系统工程是一门正在孕育发展中的学科,有待进一步去探索。  相似文献   

Components, systems and discontinuities: The case of magnetic recording and playback equipment     

Jeffery Funk 《Research Policy》2009,38(7):1192-1202

Using the history of magnetic recording and playback equipment, this paper explores the relationship between incremental improvements in components and technological discontinuities in systems. It finds that improvements in components have been the major source of all discontinuities in the industry. Focusing just on tape-based systems, all of the basic design approaches had been identified by the late 1950s and thus one of the largest technological challenges for firms has been to modify the design in response to improvements in the magnetic recording density of tape. This paper explores this phenomenon by analyzing data on equipment performance and price, and several design choices for the tape-based equipment. It shows how improvements in the magnetic recording density have changed the tradeoffs that exist between price and different dimensions of performance and between various design choices and thus led to about 10 technological discontinuities in magnetic tape system design.  相似文献