互补约束问题的信赖域算法     

薛丽红  王瑞 《集宁师专学报》2007,29(4):1-8

本文构造了一种新的互补问题的价值函数,从而把互补约束问题等价地转化为一般约束优化问题.紧接着,本文给出了信赖域算法,并证明了其算法的全局收敛.  相似文献   

Multicultural Visions of Globalization: Constructing Educational Perspectives From the East and the West     

Stephen R. White 《Interchange》2008,39(1):95-117

The thesis of this essay is that globalization is a phenomenon that humankind must be educated for understanding as a process of global evolution. The new world evolving is being defined as requiring a new sense of collective cooperation amongst the peoples of the Earth, if we are to continue to exist on the planet. Educators are in the midst of and have an important role to play in this social and conscious evolution. One of our challenges is to explore the theoretical foundations for framing a new global education agenda. The assertion is that the theories of global, social, and conscious evolution of 20^th century intellectuals and visionaries such as India’s Sri Ghose Aurobindo (1872-1950) and France’s Pierre Teilhard de Chardin (1881-1955) provide the foundation from which to construct a new global educational perspective.  相似文献   

Explaining the persistence of “decentralisation” of education in Egypt     

《International Journal of Educational Development》2021

This study examines how and why decentralisation remained central to education reform in Egypt over the period 1990–2016 despite the mixed outcome at both the national and international levels. Three decentralisation models were examined: community schools, public-private partnerships and school-based management. Network analysis was combined with a process-tracing approach to identify the key actors and mechanisms causing policy persistence. Analysis revealed international agencies used coercion through funding and persuasion by framing the models to match political sponsors’ interests. There was also bounded-rational learning by national actors from foreign experts and experiences and several complementary mechanisms with minor influence.  相似文献   

全球化竞争与中国信息产业   总被引：2，自引：0，他引：2  

丁允旭  钱敏 《情报科学》2002,20(3):326-329

信息技术是当今全球经济一体化的主要推动力之一，随着中国加入WTO的步伐日益临近，在国门彻底敞开后，如何迎接挑战、把握机遇成为中国信息产业生死攸关的重大问题。西方发达国家是这场革命的先行者，在技术、资金以及理念等关键要素上都处于绝对优势地位，与此同时我国尚未完成工业化，整个信息产业还是处于国家的引导和保护之中，即 便在加入WTO后有5年时间的保护期，但整体实力、规模和发达国家相比仍然处于不利地位。为此，本文将就中国信息产业如何开展竞争，把握生机作深入分析。  相似文献   

近50年秋季全球旱涝年的分布特征及其与海温和ENSO的关系   总被引：1，自引：0，他引：1  

杨扬  施能  白彬人  封国林 《资源科学》2004,26(4):37-44

该文用Chen等(2001)最新创建的全球陆地月降水资料(PREC/L),划分并检验了1948年～2001年全球9月～11月的旱涝年.结果表明,冷事件大多对应涝年,暖事件大多对应旱年.全球9月～11月降水有明显的年代际变化,涝年大多在80年代以前,早年大多从80年代开始.其中,1987年～1997年全球9月～11月的连续早年,是一个非常特殊的时段.指出,印度季风区域、东南亚地区、热带太平洋岛屿、我国的东南沿海及日本一带、西非季风区及墨西哥湾区域,是旱涝年的平均降水差异较大的区域.并指出,东太平洋和西南太平洋3月～5月海温的变化对于9月～11月全球陆地降水的趋势变化有很好的预报意义.划分并检验了南、北半球9月～11月的旱涝年.指出,北半球旱涝年的分布和全球的是基本一致的,南半球与北半球的旱涝年的分布具有明显的正相关.  相似文献   

Balancing the Local and the Global in Infrastructural Information Systems     

Knut H. Rolland  Eric Monteiro 《The Information Society》2002,18(2):87-100

A considerable body of literature has demonstrated-- empirically as well as analytically--that information systems need to be situated to the local context of use. Yet for infrastructural information systems that span numerous contexts spread out globally, this is literally prohibitive. For these systems to work, it is necessary to strike a balance between sensitiveness to local contexts and a need to standardize across contexts. We analyze a key element in this, namely, spelling out the (largely invisible) "costs" that the different actors pay to achieve working solutions. Empirically, we draw from an ongoing case study. We analyze the attempts of a maritime classification company with 5500 employees located in 300 sites in 100 countries to develop an infrastructural information system to support the surveying of ships globally. We elaborate design implications and concepts relevant to developing information infrastructures that also apply to the context of developing countries.  相似文献   

科学认识、国际政治利益与环境保护角力下的《京都议定书》     

杨雅惠 《未来与发展》2007,28(3):7-10,6

自有科学研究结果显示温室气体排放会导致全球暖化以来，气候变迁议题便广泛地受到国际社会与科学界的重视。本文以《京都议定书》为案例，探讨科学知识与政治利益之间的关系，并对其未来发展进行展望。  相似文献   

Many Voices: Building a Biblioblogosphere in Ireland     

Michelle Dalton  Alexander Kouker  Martin O'Connor 《New Review of Academic Librarianship》2016,22(2-3):148-159

ABSTRACT

Blogging has been associated with the Library and Information Science (LIS) community for some time now. Libfocus.com is an online blog that was founded in 2011. Its goal was to create a communal communication space for LIS professionals in Ireland and beyond, to share and discuss issues and ideas. The content of the blog is curated by an editorial team and features guest bloggers from across all sectors and experience levels. Using a qualitative methodological approach, open-ended surveys were conducted with twelve previous guest bloggers, in order to explore how and why Irish-based LIS professionals choose to communicate through blogging. It is hoped that this evidence will provide a greater understanding of both the value and effectiveness of blogging as an outreach and communication tool within the profession, helping both libraries and librarians to be more strategic in their use of it as a medium.  相似文献   

Understanding student evaluations of teaching in online learning     

Pilar Gómez-Rey  Francisco Fernández-Navarro  Elena Barbera  Mariano Carbonero-Ruz 《Assessment & Evaluation in Higher Education》2018,43(8):1272-1285

In this paper, we have developed a classification model for online learning environments that relates the Instructors Overall Performance (IOP) rating (according to students’ perceptions) with the course characteristics, students’ demographics and the effectiveness of the instructor in his/her teaching roles. To that end, a comprehensive Student Evaluation of Teaching (SET) instrument is proposed, which includes not only conventional teaching elements, but also items that encourage twenty-first century skills. The goal of the study is twofold: (i) to quantify the extent to which the selected variables explain the IOP rating, and (ii) determine which teaching and non-teaching variables most affect the IOP rating. The best performing classifier achieved a competitive accuracy, highlighting that the selected variables mainly determine the IOP values. Other important findings include: (i) the IOP value is mainly influenced by the effectiveness of the instructor in his/her teaching roles; (ii) teaching strategies that involve the cooperation between the technical and pedagogical roles should be promoted; (iii) the pedagogical role has the highest impact on the final IOP value; and (iv) the most influential demographic variable is the student’s status (working commitments and family responsibilities).  相似文献   

Assessment of rice fields by GIS/GPS-supported classification of MODIS data     

程乾  黄敬峰  王人潮 《Journal of Zhejiang University. Science. B》2004,(4)

INTRODUCTIONInthelastdecade,remotesensinghasbeenincreasinglyidentifiedasanobjective,standardized,possiblycheaperandfastermethodologyforcropproductionsurveysthanconventionalfieldinves-tigations(Bauman,1992).Muchprogresshasbeenmadethroughintensivestudiesoninventoryandproductionforecastingformajorcrops,suchaswheat,rice,cottonandmaize(Tennakoonetal.,1992;Rayetal.,1994;Fangetal.,1998).China,adevelopingcountrywith1.2billionpeople,hasbeenpayingcloseattentiontoitsex-istingandfuturefoodproduction…  相似文献