全文获取类型
收费全文 | 3077篇 |
免费 | 358篇 |
出版年
2021年 | 21篇 |
2020年 | 34篇 |
2019年 | 141篇 |
2018年 | 119篇 |
2017年 | 134篇 |
2016年 | 190篇 |
2015年 | 122篇 |
2014年 | 130篇 |
2013年 | 779篇 |
2012年 | 127篇 |
2011年 | 148篇 |
2010年 | 119篇 |
2009年 | 104篇 |
2008年 | 116篇 |
2007年 | 89篇 |
2006年 | 82篇 |
2005年 | 60篇 |
2004年 | 73篇 |
2003年 | 64篇 |
2002年 | 52篇 |
2001年 | 53篇 |
2000年 | 59篇 |
1999年 | 17篇 |
1998年 | 44篇 |
1997年 | 42篇 |
1996年 | 31篇 |
1995年 | 30篇 |
1994年 | 34篇 |
1993年 | 20篇 |
1992年 | 17篇 |
1991年 | 15篇 |
1990年 | 15篇 |
1989年 | 10篇 |
1988年 | 15篇 |
1987年 | 22篇 |
1986年 | 21篇 |
1985年 | 19篇 |
1984年 | 28篇 |
1983年 | 24篇 |
1982年 | 28篇 |
1981年 | 11篇 |
1980年 | 18篇 |
1979年 | 19篇 |
1978年 | 9篇 |
1977年 | 23篇 |
1976年 | 17篇 |
1975年 | 13篇 |
1974年 | 13篇 |
1972年 | 9篇 |
1968年 | 8篇 |
排序方式: 共有3435条查询结果,搜索用时 526 毫秒
1.
2.
3.
Anna Lora‐Wainwright 《Anthropology today》2012,28(4):8-13
China has officially become a predominantly urban country, with over 50% of the population now registered as urban residents. Its urbanization process has been described as the most managed in human history. The Chinese government manages the building of new cities, regulates the housing of displaced people and controls squatters. As an historically poorer area, the west of China has been the target of ongoing efforts at infrastructural development. Describing urbanization as managed however masks the conflicts and contradictions involved in a process which is far from smooth. Although villagers are usually seen to be largely the powerless victims of these initiatives, it is clear that many try to take advantage of the situation, while others are unable to do so. Based on recent fieldwork and eight years of visits to one village undergoing urbanization, this article looks at the complex dynamics involved and at the moral battleground which they lay bare. 相似文献
4.
5.
6.
Jennifer G. Kahn John Sinton Peter R. Mills Steven P. Lundblad 《Journal of archaeological science》2013,40(2):1194-1202
We apply X-ray fluorescence (XRF) geochemical analysis to a collection of 'Opunohu Valley lithic artifacts from Mo'orea island to investigate the local scale of raw material procurement, adze production, use, and exchange within the Society Island archipelago. We use these data to document the distribution of non-local versus local volcanic artifacts in 'Opunohu Valley house sites, ritual sites, and specialized sites, as a means for establishing intra-site production and consumption patterns, and access to exotic, possibly superior, stone resources, and how these two themes correlate with site function or household wealth and status. Overall, 30% of the artifacts analyzed via WDXRF derive from non-local sources, notably two other islands in the archipelago outside of the political boundaries of Moorean chiefdoms. Our case study thus provides the first direct material evidence of intra-archipelago trade and exchange in the Society Islands. Intra-archipelago trade in adzes was certainly in place by as early as A.D. 1350, if not earlier, and continued up until the time of European contact. In addition, our analyses have identified a local adze production locale in the Afareaitu district of Mo'orea island. The patterns of local versus non-local adze production and exchange strongly suggest that dual interaction spheres were involved. The correlation between adzes and adze-related debris produced from off-island sources and sites with specialized use, which were often reserved for the social, ritual, and political elites in Ma'ohi society suggests that some of the exotic adzes derived from gift exchange between Mo'orea and ruling elites in Tahiti and the Leeward Islands. These adzes from afar would have solidified socio-political and ideological alliances between elites in the Windward and Leeward sectors of the archipelago. 相似文献
7.
ABSTRACT. In this paper the impact of spatial and nonspatial variables on the innovation potential and innovativeness of (small) industrial firms in The Netherlands will be analyzed. Innovation potential and innovativeness will be conceived as latent variables which will be measured by a partial least squares approach. The variables reflecting innovation potential are notably input variables such as internal and external R&D, while innovativeness will be based on output indicators such as the number of product and process innovations. The regional dimension enters our analysis essentially at two levels. First, we will investigate whether more innovative firms are to some extent spatially biased (i.e., on the basis of intrafirm characteristics). Secondly, we will analyze the relevance of an indigenous regional impact, per se. In other words, we will examine whether firms with an equal innovation capacity will differ in actual (i.e., realized) innovativeness as a consequence of different regional conditions. For the first issue, our results indicate that not all regions are equally well-endowed with potentially innovative (small) firms. Our analysis even demonstrates that these firms are underrepresented in regions which are generally considered to offer the most favorable production environment. After compensating for these differences in the composition of the regional set of firms, we demonstrate that an indigenous regional impact per se cannot be identified in The Netherlands. 相似文献
8.
9.
10.