首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   197篇
  免费   11篇
  2024年   2篇
  2023年   11篇
  2022年   2篇
  2021年   4篇
  2020年   8篇
  2019年   7篇
  2018年   10篇
  2017年   11篇
  2016年   10篇
  2015年   5篇
  2014年   4篇
  2013年   23篇
  2012年   12篇
  2011年   18篇
  2010年   11篇
  2009年   9篇
  2008年   12篇
  2007年   11篇
  2006年   7篇
  2005年   5篇
  2004年   5篇
  2003年   6篇
  2002年   4篇
  2001年   3篇
  1997年   3篇
  1996年   2篇
  1995年   1篇
  1985年   1篇
  1982年   1篇
排序方式: 共有208条查询结果,搜索用时 15 毫秒
71.
This article highlights the psychological dimension of social learning. Insights from psychology address the interrelated role of personal and group dynamics in social learning. This can provide a useful starting point for a rewarding use of social learning as an analytical tool in co-creative planning. Such an approach to social learning proves beneficial to (i) identify both positive and negative potential effects of social learning, (ii) untangle hidden power relationships at play at individual and small group levels in relation to social psychological factors, and (iii) discern the role of individuals and small groups within their larger contexts. The findings are empirically illustrated with a case of incremental urban development in Groningen, the Netherlands.  相似文献   
72.
73.
The collection of early medieval window glass found in the abbey of Baume‐les‐Messieurs (Jura, France) is exceptional because it dates to the end of the eighth century, and due to the number of fragments as well as their state of conservation. Different colours and forms have been identified. These pieces are a rare opportunity to address the glass craft, its recipes and techniques for a phase of its history that has remained little known. Analyses in PIXE–PIGE prove that, in addition to fragments from two soda glass items, the pieces are made from wood‐ash glass. Most of them probably came from the same production and the raw material is present in the region. At this early stage of wood‐ash glass production, the glassmakers had mastered the glass as well as the colour processes.  相似文献   
74.
Decades of contention regarding Tasmania's forests have been accompanied by several attempts for peace. Most recently the ‘forest peace process’ culminated in the 2012 Tasmanian Forest Agreement (TFA). We evaluate the peace process that led to the TFA, and its subsequent dismantling, from the perspective of deliberative democracy, which promises to achieve democratically legitimate outcomes in the toughest conflicts. Using normative criteria to evaluate the deliberative democratic quality of the process, our analysis shows that trades-offs were needed, and not all normative criteria could be achieved equally and simultaneously. Despite its shortcomings, and short-lived life, the peace process illustrates the possibility of achieving meta-consensus in deep value conflicts, and the crucial role of this consensus for sustaining deliberation.  相似文献   
75.
The evolution of littoral palaeoenvironments in the southern Pampas region of Argentina towards the end of the early Holocene and the beginning of the mid Holocene is discussed, and the formation processes of the archaeological site of La Olla are analysed. This site is located in the intertidal zone of the present beach and is remarkably well-preserved. The human occupation at the site has been dated at between 7400 and 6480 yrs BP, and is interpreted as a place for the processing and consumption of the southern fur seal (Arctocephalus australis) and southern sea-lion (Otaria flavescens). It is concluded that biostabilization by microbial mats of the sedimentary structures and archaeological remains that developed and are present on the tidal flat prevented their erosion by wind, turbulence currents and waves. This is what has permitted the exceptional preservation of the site. On the basis of the analyses of one of the sectors of the site it can be concluded that the sedimentary succession of the La Olla site is the result of the coastal environmental changes during the early–mid Holocene in the pre-maximum transgressive episode. During this interval a tidal flat developed on the Pleistocene abrasion platform. Human occupation occurred during the formation of mixohaline marsh, an upper intertidal–lower supratidal zone ecosystem.  相似文献   
76.
氧化铁在钧瓷天蓝、天青系列釉色中的着色作用以及乳光蓝色问题,一直是学术界争论的焦点。本研究通过放大氧化铁含量的实验验证方法,通过SEM(scanning electron microscope-扫描电子显微镜)、EDS(Energy Dispersive Spectrometer-能谱仪)、XRD(X-ray diffraction-X射线衍射)等分析方法,重点研究了基础组成和分相结构对釉中氧化铁呈色的影响。同时,作者通过验证研究得出,钧瓷天蓝、天青系列釉色中,真正起呈色作用的是釉中的氧化铁等着色剂,第二相微粒散射呈色并非钧釉的普遍现象,或只是辅助呈色作用。  相似文献   
77.
《大南实录》是越南阮朝国史馆编修、载有历代皇帝实录和历代人物列传的阮朝正史,是研究越南近代史的基本史料。本文从其编修过程,主要内容,版本及流传情况,史料价值,与史实不符的若干记载等方面对这部庞大的官修史书进行初步研究。  相似文献   
78.
National and international regulatory standards require industrial risk assessment, taking into account natural hazards including earthquakes, in the framework of Quantitative Risk Analysis (QRA). Seismic fragility analysis of industrial components may be carried out similarly as what has been done for buildings, even though some peculiar aspects require the development of specific tools. In the present paper a contribution to the definition of a rational procedure for seismic vulnerability assessment of standardised industrial constructions in a probabilistic framework is given. The method covers a range of components of the same structural type. Seismic reliability formulation for structures is used. Both seismic capacity and demand are considered probabilistic with the latter assessed by dynamic analyses. The application example refers to shell elephant foot buckling of unanchored sliding tanks. A regression-based method is applied to relate fragility curves to parameters varying in the domain of variables for structural design.  相似文献   
79.
80.
A Palestinian geographer and urban planner discusses one of the territorial challenges that will likely emerge in the process of building a future Palestinian state. More specifically, he outlines how looming population pressures (high density in tandem with rapid natural increase and return of displaced refugees) will require that investments to support economic growth and new construction be organized within a national settlement system based on the existing urban hierarchy. In addition to describing the elements of such a system ("developed urban axis of Palestine"), the paper also covers the effects of public opinion and shifting political alignments within the territories on shaping the conceptualization of a future Palestinian state.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号