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   2902篇
  免费   113篇
各国政治   231篇
工人农民   97篇
世界政治   295篇
外交国际关系   194篇
法律   1125篇
中国政治   13篇
政治理论   984篇
综合类   76篇
  2023年   10篇
  2022年   10篇
  2021年   23篇
  2020年   46篇
  2019年   55篇
  2018年   97篇
  2017年   83篇
  2016年   103篇
  2015年   59篇
  2014年   75篇
  2013年   450篇
  2012年   97篇
  2011年   99篇
  2010年   74篇
  2009年   83篇
  2008年   94篇
  2007年   115篇
  2006年   77篇
  2005年   105篇
  2004年   95篇
  2003年   75篇
  2002年   84篇
  2001年   74篇
  2000年   74篇
  1999年   58篇
  1998年   49篇
  1997年   48篇
  1996年   51篇
  1995年   44篇
  1994年   41篇
  1993年   35篇
  1992年   43篇
  1991年   47篇
  1990年   45篇
  1989年   41篇
  1988年   35篇
  1987年   19篇
  1986年   24篇
  1985年   25篇
  1984年   24篇
  1983年   22篇
  1982年   31篇
  1981年   38篇
  1980年   28篇
  1979年   13篇
  1978年   14篇
  1977年   11篇
  1975年   12篇
  1974年   12篇
  1967年   7篇
排序方式: 共有3015条查询结果,搜索用时 31 毫秒
241.
242.
243.
In recent years there has been much complaint from originatingpharmaceutical companies that the test of obviousness appliedin the UK, as evidenced by decisions of the Patent Court onpharmaceutical related patents, is set unfairly low. This isof particular impact where ‘formulation’ type patentsare concerned. That is, typically, those patents that claiman existing active ingredient mixed, formulated, or combinedwith other known components or in a different way. Pharmaceuticalcompanies complain that the vulnerability of such patents againstinvalidity proceedings in the UK fails to protect the considerableinvestment made in the development of these formulations againstgeneric competition. This article looks at whether the reasons for this concern canbe traced to particular sub-tests that have been used by thecourts to try to answer the statutory test for obviousness.In particular, the sub-tests of ‘lying in the road’and ‘obvious to try’ are examined and the questionof whether there has been an imbalance between these two sub-testsis explored. Further, it is argued that the decisions in therecent cases of Saint-Gobain and Angiotech suggest that therehas been a shift in how the Court of Appeal assesses obviousness.This is away from the ‘obvious to try with a reasonableexpectation of success’ standard to one of ‘obviousto try if success is self-evident’. If the Court of Appeal follows the line taken in these two casesthen pharmaceutical patents of the formulations kind shoulda face better prospect of surviving invalidity challenges basedon obviousness in future.  相似文献   
244.
The Nature of Managerial Work, 2nd edition. By Henry Mintzberg . Engle‐wood Cliffs, N.J.: Prentice‐Hall.  相似文献   
245.
246.
247.
Climate change is emerging as one of the primary geopolitical challenges of the early twenty-first century, one that will likely involve military engagements and deployments in both traditional and non-traditional missions. Unlike mass casualty terrorism, climate change does not have a single galvanising event that can encourage collective mitigation efforts by both developed and developing states. International efforts to counter putative climate change causes have, thus far, been only marginally successful. Consequently, some of the more pernicious effects of climate change—extreme weather, heat waves, droughts and floods—will likely continue to manifest in the years and decades ahead. From a geopolitical perspective, climate change may influence the trajectory of rising or declining states in an increasingly multipolar world. It may also induce or exacerbate resource competition between states, particularly with regard to energy resources, water and food. Climate change may also exert a general weakening effect on lesser developed countries, thus necessitating increasingly intrusive and costly humanitarian assistance and disaster response (HADR) missions, some of which may be conducted by military agencies. Overall, these trends suggest that climate change will continue to emerge as a significant factor that shapes and defines future military missions and deployments.  相似文献   
248.
249.
250.
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