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   69673篇
  免费   3301篇
各国政治   4511篇
工人农民   2906篇
世界政治   6139篇
外交国际关系   3816篇
法律   33169篇
中国共产党   11篇
中国政治   770篇
政治理论   20708篇
综合类   944篇
  2021年   414篇
  2020年   1169篇
  2019年   1518篇
  2018年   1698篇
  2017年   1969篇
  2016年   2200篇
  2015年   1833篇
  2014年   2108篇
  2013年   10541篇
  2012年   1652篇
  2011年   1773篇
  2010年   1843篇
  2009年   2087篇
  2008年   1786篇
  2007年   1746篇
  2006年   1918篇
  2005年   1819篇
  2004年   1721篇
  2003年   1542篇
  2002年   1539篇
  2001年   1678篇
  2000年   1441篇
  1999年   1305篇
  1998年   1123篇
  1997年   989篇
  1996年   970篇
  1995年   939篇
  1994年   937篇
  1993年   966篇
  1992年   999篇
  1991年   1023篇
  1990年   964篇
  1989年   991篇
  1988年   1005篇
  1987年   1030篇
  1986年   1012篇
  1985年   1086篇
  1984年   965篇
  1983年   1025篇
  1982年   882篇
  1981年   832篇
  1980年   656篇
  1979年   699篇
  1978年   602篇
  1977年   533篇
  1976年   491篇
  1975年   421篇
  1974年   432篇
  1973年   422篇
  1972年   375篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
Small business crime has been largely ignored in American criminology; studies of nontraditional crime have focused mainly on corporate crime or on the misdeeds of employees pursuing personal gain. This paper calls for criminologists to redirect their efforts toward the systematic study of small business crime. In particular, it advocates in-depth qualitative studies that explore small business culture and opportunity structures, and that examine the networks of collusion that subvert the legitimate economy. The paper concludes with illustrations from an own story currently being shared with the author by a small businessman who participated for five years in an urban crime network that infiltrated the redistributive economy.  相似文献   
942.
The relation between domestic R&D and imports of technology is examined for 10 countries. Simple regressions revealed strong complementarity for each of the countries. Multiple regressions including GNP per capita and number of scientists and engineers were performed for the five countries with time series for all the variables. Strong complementarity was found between technology imports and domestic R&D and other variables for Japan and South Korea, weak for France, none for Germany and the US. Excluding government-financed R&D in the US resulted in a substitutive relation. Japan revealed a sharp decline in the ratio of technology payments to R&D spending; Korea is following in its steps. Complementarity appears to weaken in later stages as technology development strategies shift from dependent to imitative to autonomous or offensive technology development.  相似文献   
943.
When technology is transferred from one context to another, it is an established principle that innovation must take place. Even though a technology is well situated in one context, it must be adoptively redesigned for another. The sharper the difference in contexts, the greater the adaptation. This paper describes a program to transfer technology among a very diverse group of organizations: contractors to the US Department of Defense (DOD). Specifically, it describes how the technology of electronic communication, including electronic- data interchange (EDI), is being pursued by both the DOD and its supporters.  相似文献   
944.
This paper describes some of the spinoff benefits that can result from R&D projects, and categorizes them in terms of the dimensions of market and technical newness. These dimensions are discussed with reference to two types of spinoffs: 1) alternative market applications, when the results of an R&D project are subsequently applied to a market or use that differs from the originally intended application, and 2) second-generation technologies, when the technology that was the subject of an R&D project is significantly altered or enhanced in unanticipated ways through subsequent R&D. Examples from the Department of Energy's Energy-Related Inventions Program are integrated into the results of literature review to illustrate key concepts, including core technologies, degrees of market and technology newness, technology robustness, and the nature of connections linking spinoffs to prior R&D investments. The paper concludes by discussing spinoffs as a managerial strategy.  相似文献   
945.
946.
947.
948.
949.
950.
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