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   1771篇
  免费   17篇
  2020年   5篇
  2019年   18篇
  2018年   282篇
  2017年   215篇
  2016年   247篇
  2015年   19篇
  2014年   11篇
  2013年   208篇
  2012年   40篇
  2011年   169篇
  2010年   184篇
  2009年   42篇
  2008年   83篇
  2007年   82篇
  2006年   8篇
  2005年   35篇
  2004年   14篇
  2003年   14篇
  2002年   3篇
  2001年   8篇
  1998年   6篇
  1995年   3篇
  1992年   2篇
  1991年   4篇
  1990年   4篇
  1989年   3篇
  1987年   3篇
  1986年   1篇
  1985年   7篇
  1984年   2篇
  1983年   1篇
  1981年   8篇
  1980年   3篇
  1979年   10篇
  1978年   1篇
  1977年   5篇
  1976年   5篇
  1975年   6篇
  1974年   1篇
  1973年   2篇
  1972年   5篇
  1971年   2篇
  1970年   2篇
  1969年   1篇
  1968年   2篇
  1966年   2篇
  1964年   1篇
  1960年   1篇
  1959年   1篇
  1958年   1篇
排序方式: 共有1788条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Using data describing the historical distribution of county seats in the United States, we (1) replicate the traditional ratio-variable test of the size-density law, (2) test a new multivariate, nonratio form of the law, and (3) introduce an alternative method of testing, one which avoids three possible problems in traditional analyses: ratio-variables, multicollinearity, and logarithmic transformation.  相似文献   
5.
6.
7.
Born in Boston, Massachusetts, in 1947, Linenthal earned his bachelor's degree in religious studies at Western Michigan University, his master's degree in divinity at the Pacific School of Religion, and his Ph.D. in religious studies at the University of California, Santa Barbara. He is Professor of Religion and American Culture at the University of Wisconsin, Oshkosh. His books include: Symbolic Defense: The Cultural Significance of the Strategic Defense Initiative (1989); Sacred Ground: Americans and their Battlefields (2nd edition, 1993); Preserving Memory: The Struggle to Create America's Holocaust Museum (1995); American Sacred Space (co-editor, 1995). He is writing a history of the A-Bomb controversy that will appear in a book to be published in 1996. Linenthal has often lectured about controversial historic sites for National Park Service staff. At the USS Arizona Memorial, Linenthal delivered a commemorative address on 7 December 1994, on the 53rd anniversary of the attack on Pearl Harbor. Linenthal and his wife, with their two sons, reside in Oshkosh, Wisconsin. Linenthal was the only historian to testify before the Senate Committee on Rules and Administration about the National Air and Space Museum's ill-fated exhibit, “The Last Act: The Atomic Bomb and the End of World War II.” What follows is Linenthal's Senate statement and comments he has written for The Historian.  相似文献   
8.
The need for experiments to study physical aspects of craft of the past is stated, as well as the necessity for them to have clear aims and to follow the established principles of scientific enquiry. These principles are discussed in this joint paper by ten maritime archaeologists and others, together with methods and some points of management critical to their application in this field.  相似文献   
9.
Archaeological testing was conducted at the Paraje de San Diego, a late sixteenth- through nineteenth-century camp site on the Camino Real 30 mi north of Las Cruces. The site is well preserved, though the site structure is complex, reflecting repeated, short-term occupation. The archaeological record (especially the many, diverse ceramics to be recovered) reflects certain changing conditions in southern New Mexico and elsewhere over time. However, the record also indicates a pervasive resistance to development. This resistance, which might be a widespread frontier phenomenon, is called structural interia.  相似文献   
10.
In the last two decades, many states established rail promotion programs in an effort to limit the contraction of their railroad networks. Now federal funds for rail projects are nearly exhausted, and states must decide whether to expand considerably their levels of internal funding for short line investments. Such a decision requires a careful articulation of policy goals, combined with sound cost-benefit techniques. Research shows, however, that states often fail to evaluate the full range of costs and benefits when considering rail investments. Instead, the economic development benefits of local rail service frequently are overstated, while the potential for rail investments to meet broader transportation planning needs is neglected. This paper evaluates the rationale behind state intervention in the rail industry, discusses the tendency of states to focus on economic development to the exclusion of other benefit categories, and presents summary results from an analysis of an investment project in North Carolina. The paper suggests that state funding for rail projects is more likely to be justified based on intermodal substitution benefits generated by local rail service, rather than the railroads' potential to increase jobs.  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