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   2158篇
  免费   88篇
  2023年   18篇
  2021年   10篇
  2020年   32篇
  2019年   61篇
  2018年   70篇
  2017年   103篇
  2016年   87篇
  2015年   48篇
  2014年   63篇
  2013年   663篇
  2012年   60篇
  2011年   60篇
  2010年   50篇
  2009年   57篇
  2008年   46篇
  2007年   57篇
  2006年   37篇
  2005年   35篇
  2004年   43篇
  2003年   45篇
  2002年   49篇
  2001年   41篇
  2000年   31篇
  1999年   35篇
  1998年   26篇
  1997年   32篇
  1996年   20篇
  1995年   28篇
  1994年   21篇
  1993年   18篇
  1992年   9篇
  1991年   9篇
  1990年   12篇
  1989年   10篇
  1988年   12篇
  1987年   12篇
  1986年   15篇
  1985年   14篇
  1984年   19篇
  1983年   16篇
  1982年   21篇
  1981年   13篇
  1980年   10篇
  1979年   17篇
  1978年   11篇
  1977年   16篇
  1976年   11篇
  1975年   13篇
  1974年   9篇
  1973年   7篇
排序方式: 共有2246条查询结果,搜索用时 31 毫秒
1.
2.
3.
In France, the study of history behind regional geography has suffered a long decline since the late nineteenth century, but a new historical dimension is beginning to emerge. In the nineteenth century, historians showed how much regional character owed to remains from antiquity while historical geographers traced the history of exploration and discovery from ancient to modern times. Vidal de la Blache integrated historical reconstruction with social analysis in the study of regions. Vidal's followers not only characterized the distinctiveness of regional features but also demonstrated that differences in regional ways of life were more pronounced before industrialization and urbanization than later. In the first quarter of the twentieth century, historical investigations by geographers were neither sufficiently comprehensive nor sufficiently rigorous to explain spatial patterns. Historians of the Annales school obtained deeper understandings of social and economic changes and took a broader view of long-term psychological, cultural and geographical changes. Their interpretations of agrarian structures illuminated problems fundamental to the development of European civilization. In the 1970s, reacting against mechanistic analyses of spatial organization, young scholars again turned to historical geography to examine problems of social evolution. At the moment, this revival of historical interest among geographers has not attracted much attention from historians.  相似文献   
4.
5.
ABSTRACT. In a simple urban model, where the only spatial distinction made is between center and suburb, we introduce a uniform distribution of preferences for land. Under a logarithmic utility function, we examine how the location and consumption decisions of individuals differ in consequence of their different preferences for land. Comparative statics indicate that the qualitative response of the city at equilibrium to changes in per capita income and transportation cost is not affected by the introduction of such heterogeneity. Possible extensions are also briefly discussed.  相似文献   
6.
Mapping population data from zone centroid locations   总被引:1,自引:0,他引:1  
The author describes the difficulties associated with the use of maps to represent census data. "A review of the problems associated with population mapping is followed by a discussion of [an alternative method known as] a raster method for handling census data, based on population-weighted centroids, and its implications for GIS "[geographic information systems]." The geographical scope is worldwide, with an example provided using data for Wales.  相似文献   
7.
This paper has two main objectives. First, we review and evaluate four different computational methods for measuring the “fractality” of cartographic lines: these are known as the structured walk, the equipaced polygon, the hybrid walk, and the cell count methods. Second, because previous research has restricted the focus of fractal measurement exercises to isolated physical entities, the subject of our empirical study concerns the urban area of Swindon, United Kingdom, that comprises a mosaic of contiguous land-use parcels. In technical terms, the results pinpoint some of the comparative strengths and weaknesses of the four methods, whilst our substantive conclusion is that fractal dimension appears to be a function of both scale and land-use type in our geographical study.  相似文献   
8.
9.
ABSTRACT. This paper presents a set of Miyazawa interrelational multipliers, which measure how direct changes in the income of each income bracket result in indirect and induced income changes in all other brackets. The multipliers have been calculated for a 9-by-9 pairing of income brackets for West Virginia in 1982. Their estimation is based on a combination of survey and nonsurvey data in three forms: a 1982 West Virginia input-output table, a multisector income-distribution matrix, and an income disaggregated consumption matrix. The paper illustrates the usefulness of the multipliers by showing how they provide insight into the viability of trickle-down theory and the incidence of regional development policy.  相似文献   
10.
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