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   133篇
  免费   1篇
  2021年   1篇
  2020年   1篇
  2019年   3篇
  2018年   4篇
  2017年   1篇
  2016年   2篇
  2015年   2篇
  2014年   2篇
  2013年   46篇
  2012年   4篇
  2011年   5篇
  2010年   4篇
  2009年   4篇
  2008年   1篇
  2006年   5篇
  2005年   1篇
  2004年   1篇
  2003年   4篇
  2002年   4篇
  2001年   3篇
  2000年   5篇
  1998年   2篇
  1997年   4篇
  1996年   2篇
  1995年   1篇
  1993年   1篇
  1992年   2篇
  1990年   1篇
  1989年   1篇
  1985年   1篇
  1982年   1篇
  1979年   1篇
  1977年   1篇
  1975年   1篇
  1973年   2篇
  1972年   1篇
  1971年   1篇
  1970年   3篇
  1969年   2篇
  1968年   1篇
  1967年   1篇
  1966年   1篇
排序方式: 共有134条查询结果,搜索用时 31 毫秒
1.
ABSTRACT. This paper is concerned with the impacts of academic knowledge production (human capital, research, and consultancy) on the investment behavior of the manufacturing industry. Beginning with the neoclassical theory of capital accumulation, a multiregional investment model for non-residential structures and equipment is developed. Within this model, the knowledge impacts of universities are represented by a diffusion function, which takes into account the possibilities of contagious and hierarchical diffusion of knowledge. Special attention has been given to the development of a theoretically sound and empirically operational investment model, and to the identification of spatio-temporal correlation. The latter has been approached by means of the use of an EGLS estimator, based on a stationary spatio-temporal Markov scheme for the residual. The main result of the case study relating to the Netherlands is that academic knowledge production has a significant positive impact on investments in equipment which is strongest in the neighborhood of central places (i.e., following a hierarchical diffusion pattern).  相似文献   
2.
3.
4.
5.
This case study was the first of its kind, where neutron computed tomography (CT) was applied to a wrapped mummified animal. Conventional X‐ray CT was also used to allow for meaningful comparison, and complementary data for a comprehensive investigation. Previous applications of both techniques are limited to metallic objects, such as bronze Buddhas. The mummy used in this study (IA.2402) is dated between the Third Intermediate Period (1069–664 bce ) to Late Period (664–332 bce ) according to the wrapping style, and was originally believed to contain a complete skeleton of a feline. However, precise date and provenance were unknown. Our results prove the presence of only partial juvenile feline remains, and provide a date range for artefact creation (900–804 bce ± 30) and alteration (367–204 bce ± 30). Therefore, this study implements an established imaging technique (neutron CT) in a novel way, while preserving and conserving the intrinsic value of the artefact through non‐destructive investigation.  相似文献   
6.
7.
8.
Data Envelopment Analysis (DEA) is used to rank the relative efficiency of thirty–two counties comprising the Greater Minneapolis–St. Paul Metropolitan Region and finds that the greatest external economies originate in the urban core and decline toward the periphery. By employing 1993 IMPLAN input–output database and county estimates of final payments (inputs) and final demands (outputs), DEA classifies efficient and inefficient counties that produce maximum output using minimum input, and a sensitivity analysis ranks counties according to robustness of the efficiency classifications. Efficiency differences between three groups identify the metropolitan core, transitional region, and peripheral region. Dominant industries in the three regions are identified and contrasted using location quotients. This study adopts the various analytical techniques into an urban regional systems approach for policy analysis and implementation.  相似文献   
9.
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