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   4451篇
  免费   132篇
  2020年   45篇
  2019年   66篇
  2018年   370篇
  2017年   274篇
  2016年   316篇
  2015年   71篇
  2014年   77篇
  2013年   1018篇
  2012年   99篇
  2011年   246篇
  2010年   241篇
  2009年   102篇
  2008年   122篇
  2007年   182篇
  2006年   47篇
  2005年   57篇
  2004年   42篇
  2003年   35篇
  2002年   31篇
  2001年   31篇
  2000年   48篇
  1999年   43篇
  1998年   32篇
  1997年   31篇
  1996年   34篇
  1995年   31篇
  1993年   19篇
  1992年   21篇
  1991年   28篇
  1990年   23篇
  1989年   33篇
  1988年   25篇
  1987年   30篇
  1986年   33篇
  1985年   41篇
  1984年   31篇
  1983年   36篇
  1982年   26篇
  1981年   38篇
  1980年   37篇
  1979年   36篇
  1978年   39篇
  1977年   28篇
  1976年   35篇
  1975年   27篇
  1974年   19篇
  1973年   28篇
  1972年   22篇
  1971年   18篇
  1969年   24篇
排序方式: 共有4583条查询结果,搜索用时 281 毫秒
11.
A number of studies have been published about the population change in New Zealand between 1936 and 1986. During this time an intellectual and demographic revolution also took place simultaneously. From 1961 and 1986 the population increased from 2.4 million to 3.3 million mainly because of Polynesian immigration, and the elderly and females also increased. The Maoris became urban. Mortality stayed stable, but fertility declined to below replacement level in the 1980's. Murray Wilson (1988) analyzed the relationship of fertility and mortality in terms of a post-transitional (developed) society like Australia or the European norm of a 2-children family. In his view the youth culture, television, and female aspirations greatly influenced childrearing. Daniel Noin (1988) examined the current state of geographical research on mortality from a methodological point of view finding wide differences in mortality in Quebec, Brussels, Paris, and London attributable to culture. Mosley and Chen (1984) argued that social, cultural, and economic factors to mortality are mediated by individual, household, and community variables. Jones and Moon (1987) dealt with medical geography in the context of the consumption of health care and disease ecology. Momsen and Townsend (1987) addressed the role of women in developing countries stating that gender is socially created and it examined the worldwide subordination of women. In the 1980's a host of other authors have also touched on the subject of the demography of gender analyzing discrimination against female children, unmarried American women, and single parent families. Yet Fahey (1988) stated that gender was only regarded relevant by Australian geographers as a demographic variable.  相似文献   
12.
13.
14.
15.
Discrete-choice theory and logit models are evaluated for their usefulness in analyzing migration patterns in a zonal system. The authors "argue that spatial effects and more specifically the relative location of zones are not taken into account in such analyses. We, therefore, introduce a measure of spatial structure and advocate its usage as a predictor of migration in such models. In an example of intrametropolitan migration in Toronto [Canada], we demonstrate that this variable is not only significant but also it improves the performance of all the other variables with the greatest impact on the distance between zones. In addition, inclusion of this variable improves the overall performance of the model in terms of residuals."  相似文献   
16.
17.
18.
19.
The international community has hailed South African state president, F.W. de Klerk, a ‘liberator’. De Klerk liberalised the political process and deracialised aspects of state and society. But how committed to racial reform are be and his government? The regime's policies, strategies and tactics over the last two years raise many concerns that the international community has either baulked or simply ignored. The argument that the government must be rewarded and encouraged is fallacious. The South African government reacts only to pressure. The international community acted prematurely by lifting some sanctions and is undermining the prospects for a post‐apartheid society based on equal rights.  相似文献   
20.
Development of more sophisticated techniques for modeling longitudinal data has implications for improving our understanding of migration. This paper uses longitudinal data from the British Social Change and Economic Life initiative to disentangle the effects of population heterogeneity, progress through the life cycle and secular change on observed migration differentials. The data consist of retrospective life histories from people sampled in several contrasting localities in Great Britain, in which residential moves can be linked to changes in occupation and household structure. We present a framework for analysis of data of this type using a generalized linear modeling approach, together with results concerning variations in the probability of migration with age, gender, and changes in household and occupational circumstances. Of particular note is the evidence of substantial duration-of-residence effects and an unexpected later-career increase in migration propensity.  相似文献   
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