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   495篇
  免费   16篇
  511篇
  2021年   2篇
  2020年   9篇
  2019年   16篇
  2018年   17篇
  2017年   16篇
  2016年   25篇
  2015年   14篇
  2014年   12篇
  2013年   139篇
  2012年   17篇
  2011年   14篇
  2010年   10篇
  2009年   17篇
  2008年   8篇
  2007年   10篇
  2006年   10篇
  2005年   5篇
  2004年   10篇
  2003年   7篇
  2002年   9篇
  2001年   4篇
  2000年   5篇
  1999年   5篇
  1998年   6篇
  1997年   5篇
  1995年   8篇
  1994年   4篇
  1993年   3篇
  1991年   5篇
  1990年   2篇
  1989年   3篇
  1988年   2篇
  1986年   3篇
  1985年   6篇
  1984年   8篇
  1983年   5篇
  1982年   6篇
  1981年   4篇
  1980年   7篇
  1979年   5篇
  1978年   7篇
  1977年   3篇
  1976年   5篇
  1975年   4篇
  1974年   4篇
  1973年   4篇
  1972年   3篇
  1971年   2篇
  1969年   4篇
  1948年   2篇
排序方式: 共有511条查询结果,搜索用时 15 毫秒
51.
    
SUMMARY

Jeremy Bentham has two very strong commitments in his thought: one is to the principle of utility, or the greatest happiness principle, as the fundamental principle of morality; the other is to truth, as indicated, for instance, in his opposition to falsehood and fiction in the law. How, then, did Bentham view the relationship between utility and truth? Did he think that utility and truth simply coincided, and hence that falsehood necessarily led to a diminution in happiness, and conversely truth led to an increase in happiness? This article addresses this issue through two bodies of material: the first consists of Bentham's writings on religion under the heading of ‘Juggernaut’ and dating from 1811 to 1821; the second consists of the writings on judicial evidence dating from 1803 to 1812 and which appeared in Rationale of Judicial Evidence.  相似文献   
52.
    
  相似文献   
53.
    
ABSTRACT The headcount ratio in Chile has declined from 40 percent to 14 percent since 1987. However, most analysis of this reduction uses national and regional poverty statistics. In contrast, we employ poverty mapping methodologies to find heterogeneity in the effectiveness of transfers across counties. To better understand this variation, we explore the roles of characteristics of the local population, structural features of the county, and geography. The greatest reductions in poverty occur in rural households, yet population characteristics and geography are also important. These findings suggest that targeting at low levels of aggregation can deliver further reductions in poverty.  相似文献   
54.
55.
    
Charles Morgan (1795 to 1882) was one of the most important figures in the development of steam packet service in the United States. Morgan's career spanned over a half century, during which he controlled some 117 steamships. Of the three known wrecks of Morgan Line steamers, two, the New York (1837–1845) and the Josephine (1867–1881), have been documented by the Minerals Management Service, a Federal agency responsible for overseeing the extraction of mineral resources on the Outer Continental Shelf. The two vessels document the changing technology of steam navigation through the middle part of the 19th century.  相似文献   
56.
  总被引:1,自引:0,他引:1  
The concept of identity has attracted significant academic attention. This article unpacks what constitutes the Scouse identity, how it is constructed and its different dimensions, with particular reference to place, phonology and race . Its novelty lies in developing the underused concept of \"sonic geography\" to examine the extent to which sound, for example a distinctive accent and/or dialect, affects the construction of local identity. Empirically this is conducted through a detailed analysis of the Scouse, or Liverpudlian, identity. The article also deploys the concept of \"sonic exclusion\" to examine the role a distinguishing vernacular plays in shaping local identity and the extent to which it determines \"who is in\" and \"who is out\" as a Scouser. The conclusion is that an effective understanding of a Scouser is not only spatial – someone born in Liverpool – because the sonoric landscape of spoken Scouse, and thereby Scouse identity, extends beyond the contemporary political and geographic boundaries of the City of Liverpool.  相似文献   
57.
    
A quantitative bioenvironmental study of cranioskeletal size has been made of a latitude-ordered sequence of 14 series of adult skeleton sets (N=305): the archaeological remains of aboriginal maritime peoples inhabiting the west coast of North America between southern California and the Arctic. Of eight osteometric parameters of cranioskeletal size developed, the most important are partial skeleton volume (PSK) and cranial capacity (CC); and the principal bone-affecting environmental factors are the northerly climate (CLIM2c), the reconstructed diet deficient in calcium and overabundant in animal foods and vitamin D (DIET3c), and demographic stress (DSg). Prior research has demonstrated that cranioskeletal size increases with geographical latitude and decreases under dietary calcioprivation and unphysiologically high birth rates. Upon linear multifactorial statistical analysis our main finding, limited to the Amerindian subsequence (n=11 series) from the Santa Barbara Channel, the San Francisco Bay Region and the Northwest Coast, is that PSK and CC vary in direct proportion to CLIM2c, and inversely with DIET3c and DSg. Controlling for the latter two osteoantitrophic factors, coastal Amerindian female PSK rises by 9% between 34 and 54°N latitude, CC by 5%; and the male incremental rates are somewhat higher, 13 and 10%, respectively. This newly discovered climate-dependent race cline, an example of Bergmann's Rule, is interpreted as factual evidence of a mid-Wisconsin or earlier arrival date for the first Palaeoindians. Cranioskeletal size of the very small (n=3 series) Western Eskimo subsequence approximates the northernmost values of the coastal Amerindian distribution. © 1998 John Wiley & Sons, Ltd.  相似文献   
58.
  总被引:3,自引:0,他引:3  
The sophistication of regional economic models has been demonstrated in numerous ways, most recently in the form of linking several modeling systems or in the expansion in the number of equations that can be manipulated successfully to produce impact analyses or forecasts. In this paper, an alternative perspective is employed. What do regional macro-level forecasts indicate about the process of structural change? A new methodology is illustrated that enables analysts to make forecasts of detailed structural change in the interindustry relations in an economy. Using a regional econometric input-output model developed for the Chicago metropolitan region, derived input-output tables are extracted for the period 1975–2016. These tables are then analyzed to determine the forecasted direction of structural changes for the region. The innovation illustrated here is based on a model that exploits the general equilibrium spirit of computable general equilibrium models through the adjustment of input coefficients to clear markets.  相似文献   
59.
60.
Numerous scholars have outlined what they believed to be the consequences of the advent of iron technology in sub-Saharan Africa: increased food production using more efficient bush clearing tools; increased population densities; larger and more stable communities; increased trade, specialization and social differentiation; and the embryonic rise of modern politics. (Davidson 1974.) However, little has been demonstrated in the field.A regional study of the Bassar iron industry of northern Togo has shown that the rise of large-scale iron production may lead to higher population densities, larger and more stable communities, a more aggregated settlement pattern in the ore zone, and increased craft specialization and trade. However, it does not necessarily result in a significant increase in the degree of political centralization. The Bassar data also suggest that even the appearance of relatively small scale iron production may generate similar trends, albeit at more modest levels.
Résumé De nombreux auteurs ont décrit ce qu'ils proposent d'avoir été les conséquences de l'adoption de la technologie de fer dans l'Afrique au sud du Sahara: augmentation de la production de nourriture à l'aide des outils plus efficaces pour débroussailler le paysage; augmentation des densités de population; communautés plus grandes et plus stables; croissance de la commerce, de la specialisation artisanale et de la differentiation sociale; et naissance embryonique de la politique moderne (Davidson 1974). Cependant il n 'y a que très peu de ce schéma qui a été validé par les recherches sur le terrain.Une étude régionale de l'industrie du fer des Bassar du nord de Togo a montré que l'essor de la production de fer à grande échelle peut aboutir à des densités de population plus hauts, des communautés plus grands et plus stables, une répartition de l'habitat plus agrégée dans la zone des minerais de fer, et l'augmentation de la specialisation artisanale et du commerce. Cependant il n'aboutit pas obligatoirement à une centralisation importante au niveau politique. Les résultats fournis par cette étude des Bassar nous amènt à proposer aussi que même l'apparition de la production modeste de fer peut donner naissance à des développements comparables, mais d'un ampleur plus restreint.
  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