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   18615篇
  免费   140篇
  国内免费   2篇
管理学   2795篇
民族学   120篇
人口学   3099篇
丛书文集   24篇
理论方法论   1232篇
综合类   380篇
社会学   8494篇
统计学   2613篇
  2020年   103篇
  2019年   138篇
  2018年   1808篇
  2017年   1846篇
  2016年   1236篇
  2015年   161篇
  2014年   205篇
  2013年   1419篇
  2012年   526篇
  2011年   1357篇
  2010年   1200篇
  2009年   950篇
  2008年   1015篇
  2007年   1178篇
  2006年   204篇
  2005年   411篇
  2004年   406篇
  2003年   354篇
  2002年   242篇
  2001年   170篇
  2000年   187篇
  1999年   151篇
  1998年   145篇
  1997年   122篇
  1996年   159篇
  1995年   132篇
  1994年   141篇
  1993年   133篇
  1992年   145篇
  1991年   158篇
  1990年   176篇
  1989年   144篇
  1988年   167篇
  1987年   138篇
  1986年   133篇
  1985年   138篇
  1984年   145篇
  1983年   137篇
  1982年   100篇
  1981年   81篇
  1980年   88篇
  1979年   114篇
  1978年   89篇
  1977年   71篇
  1976年   81篇
  1975年   55篇
  1974年   75篇
  1973年   52篇
  1971年   44篇
  1970年   44篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
We discuss the issue of using benchmark doses for quantifying (excess) risk associated with exposure to environmental hazards. The paradigm of low-dose risk estimation in dose-response modeling is used as the primary application scenario. Emphasis is placed on making simultaneous inferences on benchmark doses when data are in the form of proportions, although the concepts translate easily to other forms of outcome data.  相似文献   
63.
Married individuals are healthier than single individuals though the reasons are not well understood. Individuals with spouses/or partners are less likely to smoke. We explore the relationship between health and marital status by analyzing three potential channels through which marriage affects smoking, i.e., consumption externalities (one spouse's smoking affects the other spouse's welfare), altruism (one spouse reduces smoking in response to the other spouse's bad health), and learning about risks of smoking from the health experience of one's spouse. We find spousal health does not affect smoking due to altruism or learning within the household but do find evidence for consumption externalities.  相似文献   
64.
65.
66.
67.
68.
Betrayal by a significant object is seen as primary in causing behavioral and emotional disturbances in incest victims, leading to a pervasive identification with the aggressor and disturbances in object relations development. Identification with the aggressor is understood not as a uniform defense mobilized against a specific affect but as a complex compromise formation which defends against anxiety, while also providing libidinal, aggressive and superego gratifications. Far from simply attempting to overcome the past, identifications thus preserve affects that have become pleasurable and self-defining. Two case studies of adolescent girls illustrate how treatment can help victims recognize and begin to forego the sadomasochistic pleasure derived from these identifications, a relinquishment necessary for true mastery.  相似文献   
69.
There was a time in this fair land when the railroad did not run When the wild majestic mountains stood alone against the sun Long before the white man and long before the wheel When the green dark forest was too silent to be real For they looked into the future and what did they see They saw an iron road running from the sea to the sea Bringing the goods to a young growing land All up through the seaports and into their hands From “Canadian Railroad Trilogy” by Gordon Lightfoot The authors thank CPR managers and union officials representing CPR employees for their cooperation and patience in explaining the intricacies of the railroad industry. Special appreciation is extended to Jason Copping, Labour Relations Manager, for his facilitating our initial access to the company.  相似文献   
70.
Abstract Over the 1980–1990 period, employment in producer services industries in the nonmetropolitan United States increased substantially. This growth resulted in the development of nonmetropolitan growth nodes in producer services industries. A growth node refers to a nonmetropolitan area that contains a greater than average concentration of employment in a particular industry sector relative to other nonmetropolitan areas. Moreover, this industry concentration not only increases over time, but also represents an important source of employment growth within the area. With nonmetropolitan counties as the spatial unit of analysis, 317 growth nodes in producer services industries are identified for the 1980–1990 period. Access to workers with clerical and administrative support skills, access to highly educated workers, higher earnings per employed worker, access to recreational amenities, and proximity to metropolitan areas were associated with the development of nonmetropolitan growth nodes in producer services industries during this period.  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