全文获取类型
收费全文 | 1472篇 |
免费 | 36篇 |
专业分类
1508篇 |
出版年
2025年 | 1篇 |
2024年 | 20篇 |
2023年 | 18篇 |
2022年 | 36篇 |
2021年 | 26篇 |
2020年 | 78篇 |
2019年 | 83篇 |
2018年 | 73篇 |
2017年 | 78篇 |
2016年 | 89篇 |
2015年 | 52篇 |
2014年 | 58篇 |
2013年 | 130篇 |
2012年 | 82篇 |
2011年 | 57篇 |
2010年 | 71篇 |
2009年 | 65篇 |
2008年 | 70篇 |
2007年 | 58篇 |
2006年 | 42篇 |
2005年 | 62篇 |
2004年 | 46篇 |
2003年 | 33篇 |
2002年 | 38篇 |
2001年 | 34篇 |
2000年 | 29篇 |
1999年 | 19篇 |
1998年 | 12篇 |
1997年 | 13篇 |
1996年 | 11篇 |
1995年 | 7篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 5篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有1508条查询结果,搜索用时 0 毫秒
71.
SIERDJAN KOSTER 《Tijdschrift voor economische en sociale geografie = Journal of economic and social geography = Revue de géographie économique et humaine = Zeitschrift für ?konomische und soziale Geographie = Revista de geografía económica y social》2007,98(5):667-674
New firm formation is commonly seen as a representation of the entrepreneurial capacity of a region. However, there is also a group of new firms that is based on the replication of existing business practices rather than on the entrepreneurial introduction of new practices. Both groups of founding types have a role in the explanation of regional economic development. This paper displays the spatial and industry patterns of two types of new firm formation representing each function: individual foundings and organisational foundings. 相似文献
72.
EDDO COIACETTO 《Geographical Research》2007,45(4):340-347
Socio‐spatial differentiation or the spatial arrangement of social groups in cities has long been the subject of scholarly attention in urban studies from a variety of perspectives. In many contemporary societies, the development industry plays an important and growing role in socio‐spatial differentiation. This paper presents a conceptual model for the empirical analysis of the role of this industry in shaping urban social space. 相似文献
73.
Lissa Roberts 《History & Technology》2013,29(4):417-439
Entrepreneurship played a crucial role in the development and diffusion of steam technology. To account for this, we need to map the entrepreneurial activities that helped spread steam technology across Europe and beyond. Because tracing this history’s contours requires attending to local contexts, strategies and uses along with large-scale trajectories, it makes sense to speak of historical ‘geographies’ rather than of steam technology’s historical ‘geography’. Speaking of geographies in the plural also refers to the recognition that places can simultaneously be located in multiple spatial situations, their geographical identities the product of historical work, negotiation and perspective. To illustrate these points, this essay begins by reflecting on what might be called the ‘spatial turn’ in the history of technology and the role of entrepreneurship in the spread of steam technology in France during the second half of the eighteenth century, which is the historical focus of this essay. It then discusses a small number of representative cases of entrepreneurial engagement with steam technology in France and concludes by considering what this tells us about the relationship between the French state and its regions and the impact of the French Revolution in this geographically complex history. 相似文献
74.
Merab G. Tsagareli 《Journal of the history of the neurosciences》2013,22(3):288-306
This paper is dedicated to one of the outstanding scientists of the twentieth century—Ivane Beritashvili. He was a Georgian physiologist who graduated from St. Petersburg University and worked under the supervision of N. Wedensky. He founded the Department of Physiology and the Institute of Physiology at the University of Tbilisi, Georgia. Among his numerous contributions was the discovery of the rhythmical course of reciprocal inhibition in spinal reflexes, the first demonstration of the excitatory and inhibitory reactions in the brain stem neuropil. But Beritashvili's most significant contribution was the discovery of the mediation of animal psychoneural behavior by image-driven memory. 相似文献
75.
The exploitation of guano was one of the first important economic activities in Chile and Bolivia during the 19th century. Although its development was brief and less successful than the guano industry in neighbouring Peru, it laid the foundation of a state business system based on the granting of franchises to private companies, regulation of the maritime trade and modernisation of the extractive process to improve the exploitation of mineral resources.Caleta Robles, a guano production centre between 1862 and 1883, succeeded the exploitation of other guano deposits on the Mejillones peninsula coast from the 1840s. It represents a highly relevant coastal archaeological site illustrating the early development of the mining industry in the north of Chile.The preliminary results of the investigations conducted on this site have created an understanding of the spatial distribution of the different functional areas relating to the different phases of the production process and their adaptation to suit the peculiar topographical conditions of the site. 相似文献
76.
Ralph E. Molnar 《Alcheringa: An Australasian Journal of Paleontology》2013,37(2):329-339
New observations on various sauropod postcranial elements from Queensland provide insights into the taxonomic composition of northern Australia's sauropod fauna and the structure of sauropod vertebrae. An incomplete sauropod humerus from a site near Blackall, Queensland, represents the southernmost occurrence of sauropod fossils in the Eromanga Basin, and indicates a possibly new taxon. The internal architecture of at least one of the vertebral centra of Austrosaurus mckillopi comprises bony disks parallel to the posterior articular face and bony lamellae perpendicular to the anterior articular face reinforcing the structure against axial forces. The lack of pneumaticity proximally in dorsal ribs indicates that A. mckillopi may not be a titanosauriform. Material (QM F6737) from the Winton Formation includes probable osteoderms, the first known from Australian sauropods, and some of the oldest known. Comparison of this specimen with named Winton Formation sauropods suggests that it represents a distinct taxon. 相似文献
77.
This article examines how younger migrant women from Turkey maneuver the public and private spaces of their everyday lives in a neighborhood in Germany, and how they challenge and affirm the patriarchal practices and gender norms that husbands, fathers, and older migrant women seek to impose within and outside private homes. Younger migrant women selectively comply with gendered and generational norms of veiling and dress, while at the same time also reworking gender roles, and avoiding and transgressing masculinist spaces. Younger migrant women's practices and spatial representations in mental maps reveal the complex entanglements of compliances and resistance, and dispel simple assumptions of being overwhelmingly victimized by their potentially violent men that are so prominent in contemporary Western societies. 相似文献
78.
《Interdisciplinary science reviews : ISR》2013,38(1):29-43
AbstractThe physical space has historically served as an important support for human expression. However, the production of location-based information has been consciously used as means of social control by the hegemonic power, which decides what can be publicly displayed, and what should be hidden. With the development of mobile media, space has gained new dimensions, resulting in a sort of hybrid space where digital information overlays the physical space revealing what was previous unknown about a place. As mobile devices become increasingly present in our society, they should be understood as a social interface to our experience of space, serving not only as means to consume information, but also tools for communication. This paper discuss the current mobile media practices, such as mapping, urban electronic annotations, location-based mobile games, and smart mobs, which creates opportunities for new forms of human expression, reappropriations of space, and contestation of hegemonic power. 相似文献
79.
ERIC KOOMEN TOM KUHLMAN JAN GROEN ARNO BOUWMAN 《Tijdschrift voor economische en sociale geografie = Journal of economic and social geography = Revue de géographie économique et humaine = Zeitschrift für ?konomische und soziale Geographie = Revista de geografía económica y social》2005,96(2):218-224
The agricultural sector in the Netherlands has lost much of its importance over the last 50 years in terms of the number of people involved and its relative contribution to the economy – even though production is still increasing. Yet, the area under agricultural use has changed relatively little: farmland still dominates the country. The question for the future is how expected further changes in agriculture will affect agricultural land use: how much land will be taken out of production and to what use it will be put. This is especially relevant now that the Dutch Government has decided to loosen its grip on spatial planning. Two opposing socio‐economic scenarios are therefore drafted that offer a coherent view on agricultural change, external pressures and government intervention. Implementing these in a land use simulation model provides an initial answer to the possible future of agricultural land in the country. 相似文献
80.
YEHUA DENNIS WEI DANLIN YU XIAOJING CHEN 《Tijdschrift voor economische en sociale geografie = Journal of economic and social geography = Revue de géographie économique et humaine = Zeitschrift für ?konomische und soziale Geographie = Revista de geografía económica y social》2011,102(4):406-425
This study analyses regional development in provincial China through a case study of Jiangsu following the multi‐scale and multi‐mechanism framework. We have revealed a trend of increasing regional inequality and find it is mainly a result of the rapid development of Sunan (Southern Jiangsu), which also results in rising rural inter‐county inequality. Subei (northern Jiangsu) faces more challenges due to the strong effects of self‐reinforcing agglomeration and the constraints of geographical barriers. The spatial Markov chain analysis reveals that the development status of neighbouring counties has a strong influence on a county's development dynamics; a poor county neighbouring relatively richer counties has a higher possibility to move upwards, and vice versa. The geographically weighted regression analysis reveals that development mechanisms have strong local characteristics and the same mechanism affects regional development differently. Finally, our study confirms that the multi‐scale and multi‐mechanism framework helps the understanding of regional development in Jiangsu. 相似文献