全文获取类型
收费全文 | 514篇 |
免费 | 18篇 |
出版年
2024年 | 1篇 |
2023年 | 5篇 |
2020年 | 12篇 |
2019年 | 9篇 |
2018年 | 19篇 |
2017年 | 24篇 |
2016年 | 16篇 |
2015年 | 10篇 |
2014年 | 20篇 |
2013年 | 111篇 |
2012年 | 16篇 |
2011年 | 16篇 |
2010年 | 19篇 |
2009年 | 14篇 |
2008年 | 9篇 |
2007年 | 10篇 |
2006年 | 9篇 |
2005年 | 8篇 |
2004年 | 3篇 |
2003年 | 10篇 |
2002年 | 14篇 |
2001年 | 9篇 |
2000年 | 12篇 |
1999年 | 39篇 |
1998年 | 30篇 |
1997年 | 10篇 |
1996年 | 3篇 |
1995年 | 6篇 |
1994年 | 5篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1987年 | 3篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 4篇 |
1982年 | 4篇 |
1981年 | 4篇 |
1980年 | 6篇 |
1979年 | 2篇 |
1978年 | 4篇 |
1977年 | 6篇 |
1976年 | 1篇 |
1975年 | 3篇 |
1966年 | 1篇 |
排序方式: 共有532条查询结果,搜索用时 15 毫秒
81.
Michel De Boüard 《Medieval archaeology》2013,57(1):64-81
RECOGNITION IN THE Castle Museum, Nottingham, of a ‘lost’ sword from a Viking-age warrior's grave excavated at Donnybrook, Co. Dublin, in 1879, has prompted a reassessment of the burial, which is discussed in relation to other Viking-age burials in the ‘Irish Sea province’. Detailed metallurgical analysis of the sword, undertaken during conservation, has provided important information about the techniques of its construction, and has demonstrated the potential of a variety of analytical approaches. 相似文献
82.
83.
Koen Deforce Ilse Boeren Sara Adriaenssens Jan Bastiaens Luc De Keersmaeker Kristof Haneca Dries Tys Kris Vandekerkhove 《Journal of archaeological science》2013
A detailed study of charcoal burning activities has been made for the Zoersel forest (Northern Belgium) based on an inventory of charcoal kiln remains, the analyses of wood charcoal and other charred botanical macroremains and radiocarbon dating of 10 of these kilns. Age determination of the youngest kilns was refined by dendrochronological analysis of trees growing on top of these kiln sites. The results show that, although many kilns were found, charcoal was produced in Zoersel only at certain moments during late and post-medieval times suggesting that charcoal burning was not a part of the regular management practice of these forests. The wood used for the production of charcoal mainly consists of taxa of alluvial (alder) forests while the kilns are situated on sites that currently are rather dry, with an oak dominated vegetation. For the older kilns, this contrast could be explained by an important change in local soil conditions. The younger kilns may be related to the conversion of alder woodland to grassland in the lower parts of the domain, with the kilns being constructed in the nearby dryer woodland areas. 相似文献
84.
85.
Endogenous growth models are built around the concept of a knowledge stock. This knowledge stock can also be interpreted as a localized stock that operates at the regional level, as is common in the regional innovation systems literature. We use data from the second, third and fourth Community Innovation Surveys (covering 1994–1996, 1998–2000 and 2002–2004) to measure the build-up of knowledge at a very low regional aggregation level (“across streets and hallways”) in the Netherlands. In doing so, we account for regional agglomeration effects. We find that such local knowledge stocks have a small influence on innovation and are far outweighed by firm-specific characteristics. 相似文献
86.
Jan De Graaf 《Journal of Modern Italian Studies》2013,18(5):620-639
ABSTRACTThis article challenges conventional wisdom on the northern Italian industrial heartlands during the first decade after the Second World War. For there still exists a certain mythology about the post-war proletarian north as a region that was both intensely political and united in purpose. What this article demonstrates is that the ‘industrial triangle’ of Genoa, Milan and Turin was far more divided than historians have assumed. By revisiting the manifold (wildcat) strikes, trade union demonstrations, and factory occupations of the early post-war years, it shows the industrial north to be divided along both social and geographical lines. In doing so, it sheds fresh light on the series of defeats that the main Italian trade union confederation (C.G.I.L.) suffered in the late 1940s and early 1950s. It argues that these defeats were due as much to the explicit politicization of labour struggles and their exclusive focus on the interests of skilled workers as to the hostile socio-political climate in which the C.G.I.L. had to operate. 相似文献
87.
北京王府井大街消费行为的空间特征分析 总被引:4,自引:1,他引:3
根据对北京市王府井大街消费者调查所获数据的分析,以地块为分析单位从空间角度探讨消费者的行为特征,包括人流、停留人次、消费金额、人均消费金额等要素的空间分布的基本特征以及入口、回游、出口各阶段的空间特征,以认识消费行为的复杂性和影响因素的多样性。
研究发现:总消费额与消费者人数的相关性远高于人均消费,显示了商业街经济活动以量取胜的现实;是否位于步行街区域及是否设有大型百货公司的影响在每个层面都得到了很明显的体现;另外由于公共交通所决定的出入口区也影响到了附近地块的商业表现。对出入口位置以及起始、回游、结束三地块消费者的人流分布的分析表明:位于起始消费阶段的消费者的人均消费额要远高于其他阶段。消费者的回游流动特点:①具有沿步行街区域由南向北的明显方向性;②相邻地块回游较为频繁;③步行街内部回游频繁,以外地区,特别是离主要出入口较远的北部区域鲜有人的活动;④大型百货之间的回游,特别是对面地块之间的互串较为频繁,最大的回游出现在新东安市场-北京市百货大楼。 相似文献
88.
The application of FT‐Raman spectroscopy and visible Raman microscopy to the non‐destructive analysis of pigment specimens excavated from Tell el Amarna by Flinders Petrie in the 1890s has provided information about the chemical composition of the materials used by XVIIIth Dynasty artists in the New Kingdom at the time of King Akhenaten, c. 1340 bc. Comparison of the Raman spectra of the samples labelled ‘red and yellow ochre’ with documented, archival material from geological collections provided a clear indication of the materials used in the iron(III) oxide/hydroxide system, including α‐hematite, goethite, maghemite, magnetite and lepidocrocite. The yellow–orange specimen labelled ‘realgar’ proved to be a mixture of realgar and pararealgar; since the specimen had been sheltered from light since its excavation, this could indicate that the ancient Egyptian artists recognized the colour variation and may have used this to effect in their decorations. A specimen of yellow ochre contained goethite, α‐FeO.OH, with particles of crystalline, highly ordered graphite; in contrast, the red ochre specimens contained amorphous carbon particles. 相似文献
89.
90.
中国乡村城市化研究:起源、概念、进展与展望 总被引:17,自引:0,他引:17
本文回顾了20世纪80年代以来我国乡村城市化研究的起源,对乡村城市化和自下而上城市化两个概念进行了辨析,对近20年来乡村城市化研究的内容、进展以及存在的主要问题进行了评述,并对未来乡村城市化研究的方向作出了展望。 相似文献