全文获取类型
收费全文 | 1925篇 |
免费 | 320篇 |
出版年
2021年 | 17篇 |
2020年 | 19篇 |
2019年 | 115篇 |
2018年 | 85篇 |
2017年 | 90篇 |
2016年 | 145篇 |
2015年 | 88篇 |
2014年 | 101篇 |
2013年 | 503篇 |
2012年 | 94篇 |
2011年 | 118篇 |
2010年 | 84篇 |
2009年 | 66篇 |
2008年 | 86篇 |
2007年 | 78篇 |
2006年 | 57篇 |
2005年 | 30篇 |
2004年 | 46篇 |
2003年 | 34篇 |
2002年 | 33篇 |
2001年 | 29篇 |
2000年 | 36篇 |
1999年 | 15篇 |
1998年 | 21篇 |
1997年 | 26篇 |
1996年 | 15篇 |
1995年 | 20篇 |
1994年 | 16篇 |
1993年 | 6篇 |
1992年 | 9篇 |
1991年 | 6篇 |
1990年 | 7篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 6篇 |
1986年 | 9篇 |
1985年 | 11篇 |
1984年 | 7篇 |
1983年 | 10篇 |
1982年 | 13篇 |
1980年 | 8篇 |
1979年 | 11篇 |
1978年 | 11篇 |
1977年 | 8篇 |
1976年 | 10篇 |
1975年 | 5篇 |
1974年 | 7篇 |
1973年 | 4篇 |
1970年 | 4篇 |
1969年 | 4篇 |
排序方式: 共有2245条查询结果,搜索用时 46 毫秒
1.
2.
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
3.
4.
5.
6.
Charles Revelle 《Journal of regional science》1986,26(2):343-358
ABSTRACT. The problem of the ice cream vendor on the beach is extended to the siting of multiple entering servers into the midst of existing servers which are already in place at multiple sites on a network. The network of population nodes, joining arcs, and eligible sites for servers provides the underlying matrix of the problem. The goal of the single firm which is siting the multiple entering servers is the capture of the maximum population from existing servers. This combinatorial problem can be described as a linear integer program for which solutions can easily be derived. Computational experience and insights derived therefrom are reported. 相似文献
7.
8.
9.
10.