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   307篇
  免费   6篇
  313篇
  2024年   2篇
  2023年   10篇
  2022年   2篇
  2021年   1篇
  2020年   14篇
  2019年   17篇
  2018年   29篇
  2017年   34篇
  2016年   27篇
  2015年   16篇
  2014年   20篇
  2013年   77篇
  2012年   5篇
  2011年   5篇
  2010年   5篇
  2009年   5篇
  2008年   9篇
  2007年   2篇
  2005年   2篇
  2004年   1篇
  2001年   2篇
  2000年   2篇
  1999年   1篇
  1998年   4篇
  1996年   3篇
  1993年   2篇
  1992年   2篇
  1990年   2篇
  1989年   1篇
  1988年   1篇
  1987年   3篇
  1986年   1篇
  1985年   1篇
  1982年   1篇
  1979年   1篇
  1978年   1篇
  1977年   1篇
  1957年   1篇
排序方式: 共有313条查询结果,搜索用时 0 毫秒
81.
82.
    
  相似文献   
83.
    
In 1842, the Parisian editor Louis-Antoine Pagnerre published the Dictionnaire politique. This large volume was the manifesto of the French Republicans in opposition to the conservative governments of King Louis-Philippe under the July Monarchy. One of the most original aspects of the Dictionnaire resides in the attempt to link the doctrine of republicanism to political economy. It is the purpose of this paper to analyse the republican political economy presented in Pagnerre's dictionary. First, we detail the historical context in which it appeared, stressing on Pagnerre's biography and on the composition of the group of young republicans who wrote the main economic entries of the book. Second, we focus on the economic ideas about the political regulation of industrial phenomena and the solutions these Republicans imagined to solve the social question. Third, we conclude by attempting to summarize the main characteristics of this republican political economy and to appreciate its originality.  相似文献   
84.
    
Gershom Scholem wrote his famous article, “Redemption through sin”, in 1937, and J.L. Talmon gained the inspiration for his first book, The Origins of Totalitarian Democracy, in the years 1937–1938 at the time when the Moscow trials revealed to the world the bitter reality of what was happening in the Soviet Union. Scholem and Talmon were contemporaries and witnesses of the transformation of communism in the Soviet Union from a vision of egalitarian and universal redemption into a bureaucratic and nationalistic despotism. The major scholar of the history of religious Messianism and the major scholar of the history of secular Messianism both widened the scope of their investigations—the first extending them into the history of Sabbataianism and the second into the French Revolution—and both reached a similar conclusion: both recognized, as Scholem put it, “the profound truth relating to the dialectics of history … of the historical process whereby the fulfilment of one political process leads to the manifestation of its opposite. In the realization of one thing its opposite is revealed”. The two great Israeli historians of ideas plumbed the depths of one of the most fascinating and at the same time tragic manifestations of la condition humaine: the human challenge of bringing the heavenly city down to the vale of tears, and the price that men have to pay for their Messianic passion.  相似文献   
85.
86.
    
ABSTRACT

In this paper, we analyze the isotopic niche and resource use of the guanaco (Lama guanicoe), pampas deer (Ozotoceros bezoarticus) and marsh deer (Blastocerus dichotomus) on the temperate plain of the northern Pampa region in the southeast of South America. The measured stable isotope compositions in bone tissue are δ13C, δ15N and δ18O. All the analyzed samples were recovered from different archaeological sites from the late Holocene. According to the results, the guanaco was strictly confined to the Pampa plain environment, developing a broad niche based on C3 plants and a variable contribution of C4 grasses within a grazing trend. The pampas deer preferentially used the Pampa plain, but also the prairies on the borders of the wetland, showing eurioic characteristics and a narrower niche based on C3 plants. In turn, the marsh deer was strictly confined to wetland environments, developing a C3 diet–base, within a narrow isotopic niche and stenoic characteristics. The three mammals showed a wide range of intraspecific variability, which was a key factor in their adaptability to spatial and temporal changes in the vegetation coverage. In fact, the temporal trends of their isotopic values were concurrent with the major climatic variations of the Holocene. Differences in the correlations between the values of both carbon sources in both deer species compared with the guanaco suggest a distinct chemical composition of their diet and/or differences in the allocation of nutrients. The isotopic values of nitrogen and spacing of the carbon sources in guanaco (pseudoruminant) and both deer species (ruminants) show no significant differences between them, thus establishing the values for local large herbivores. Significant correlations between δ13C and δ15N were found in the guanaco and marsh deer. The regional and extra–regional variability in the guanaco's δ13Ccollagen and δ15N probably reflect the clinal variations in the vegetation coverage and the amount of rainfall. The collagen isotope values in the guanaco throughout the entire Holocene show that the humid Pampa would have shifted between being a more recurrent mesic and temperate plain with minor phases of dry–mesic conditions like during the Little Ice Age, and a humid and warm one at the peaks of the Holocene Thermal Maximum and the Medieval Climatic Anomaly. The guanaco and the pampas deer adapted to all the climatic changes that happened on the humid Pampa until the biological invasions of large European mammals changed the herbivores’ guild composition of this vast plain, pushing them into peripheral habitats due to competition. The within–species variability in isotopic signals through time and space make it necessary to carry out adequate sampling before reconstructing the diets of local past populations.  相似文献   
87.
    
ABSTRACT

The current trend toward the hybrid methodology of combining terrestrial laser scanner (TLS) with close-range and UAV-assisted photogrammetry is becoming the most effective method for the complete capture of archaeological sites. In this article, we consider three objectives in this regard: first, to check an integration procedure, based on different capture techniques, to obtain the best possible complete digital model in different situations related to size, lighting, and occlusions. Second, a “laser scanning with the help of photogrammetry” strategy for the operation with the different data sources, which allows to adapt the processes of photogrammetric orientation, cloud registration, and automatic texturing, to the characteristics of each capture model. Finally, to present the digital edition of these models through automatic technical projections and realistic visualizations, to show their ability to interpret their geometry or share their knowledge, respectively.  相似文献   
88.
  总被引:1,自引:0,他引:1  
The role of cities in fostering innovation has for long been taken for granted. Agglomeration and the knowledge spillovers generated in dense urban environments have been considered fundamental drivers of innovation. This view has, however, become challenged by research questioning the returns to physical agglomeration and local networking, placing instead more emphasis on the importance of interregional and international collaboration, and on innovation in peripheral regions. This paper delves into the debate on the role of cities for innovation by examining the interplay between urban location and local collaboration in Norway. It uses data from the Community Innovation Survey for 2006–2010 to map out the geographical dimension of R&D collaboration in Norwegian firms with a view to assessing whether different types of R&D collaboration in urban and rural locations affect firms’ propensity to innovate. The results show that local collaboration is associated with increased process and organisational innovation, while it does not produce higher levels of product or marketing innovation. Conversely, international collaboration is connected with higher probabilities of product, new-to-market and marketing innovations. Furthermore, location in urban or rural areas makes no difference for most innovation outcomes in Norway when other characteristics are controlled for. Location in cities also does not shape the returns to local R&D collaboration. Hence, the role of cities for innovation in Norway, whether in themselves or as sites for dense local interaction, is less relevant than the urban innovation literature would predict.  相似文献   
89.
This article examines separation movements in Britain’s Australasian colonies during the first decade of responsible government, 1856–65. Separation movements sought to carve new colonies from the territory of existing ones or, in the case of a number of New Zealand movements, to create new provinces within that colony’s quasi-federal system. Their demands rested upon assertions that a colonial or provincial government neglected large and prosperous hinterlands from which considerable revenue was collected. Only one colonial separation movement achieved its goal, but four provinces succeeded. I argue that responsible government played a major role in the success or failure of these movements. Responsibility concentrated authority in a remote capital; colonial separatists desired to exercise this privilege within a smaller new colony that they controlled, but its operation within the larger existing colony provided London with justification to reject most appeals. Further, it allowed New Zealand’s parliament to frame a mechanism that enabled discontented regions to become provinces without referral to local or imperial legislatures. Thus, I provide new insights into the formation of colonial polities and the influence of responsible government on settler political campaigns.  相似文献   
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