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   398篇
  免费   13篇
  2023年   1篇
  2021年   2篇
  2020年   6篇
  2019年   13篇
  2018年   18篇
  2017年   24篇
  2016年   21篇
  2015年   4篇
  2014年   16篇
  2013年   112篇
  2012年   12篇
  2011年   6篇
  2010年   14篇
  2009年   15篇
  2008年   11篇
  2007年   8篇
  2006年   7篇
  2005年   6篇
  2004年   12篇
  2003年   5篇
  2002年   7篇
  2001年   8篇
  2000年   8篇
  1999年   9篇
  1998年   3篇
  1997年   2篇
  1996年   3篇
  1995年   1篇
  1994年   4篇
  1993年   1篇
  1992年   5篇
  1991年   1篇
  1990年   3篇
  1989年   3篇
  1988年   1篇
  1987年   5篇
  1986年   1篇
  1985年   3篇
  1984年   2篇
  1983年   3篇
  1982年   2篇
  1981年   1篇
  1980年   3篇
  1979年   2篇
  1978年   3篇
  1977年   1篇
  1976年   3篇
  1975年   3篇
  1974年   3篇
  1972年   4篇
排序方式: 共有411条查询结果,搜索用时 31 毫秒
81.
82.
83.
This paper presents a vision and a pathway for the future of archaeological practice, in which several fields that are currently considered distinct, including community-based collaborative archaeology, indigenous archaeology, and applied archaeology, could become the norm. Inspired by personal encounters with some exceptionally open and collaborative archaeology projects, as well as by recent advances in archaeological science, which are starting to make it more portable, this paper sets out an agenda for a more open approach to archaeological practice. It advocates a method of producing knowledge about the past that does not privilege one investigator over another, but gives everyone who is interested and wants to participate an opportunity to do. Specific methodological challenges that are discussed include the need to ‘flip’ the public outreach element of research designs, to embed open participation from the outset by nurturing relationships of mutual respect and trust, and to take advantage of, and improve, the portability of archaeological science, so that it can be done in and by local communities. It is argued here that the opening of archaeological research, including the archaeological sciences, to a wider range of participants, is the most ethical approach to archaeological practice in a pan-disciplinary research environment.  相似文献   
84.
ABSTRACT. Price dispersion (variation) and agglomeration are common characteristics of spatial markets, in particular, markets with imperfect consumer information and search. However, pricing and location strategies in these markets are not well analyzed since spatial search is difficult to model without restricting the spatial dimension of the problem. This paper analyzes pricing and location strategies in a market with spatid search using a probabilistic modeling strategy that does not restrict search patterns in the plane. Specifically, the analysis considers the pricing strategy of an isolated firm in response to the agglomeration of competing firms. Results indicate that spatial and temporal price dispersion are effective responses to competitors'agglomeration. However, the relative effectiveness of these strategies varies with market conditions. In addition, agglomeration can have some counterintuitive effects. This paper also provides insights into existing theories of spatial search and spatial competition in spatially-restricted (linear and circular) markets.  相似文献   
85.
86.
The problem of ecological correlation is now widely recognized but detailed analyses of the effects of aggregation on correlation and regression coefficients are rare. A short review of the aggregation problem is followed by an analysis of the specific effect of proximity aggregation on the slope coefficient of a bivariate linear model using data drawn from the Los Angeles Metropolitan region. The evidence suggests that changes in the slope coefficient are best related to the manner in which the covariation between the independent and dependent variables changes with increased aggregation.  相似文献   
87.
88.
89.
90.
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