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   19703篇
  免费   397篇
  国内免费   2篇
管理学   2594篇
民族学   111篇
人口学   1730篇
丛书文集   75篇
教育普及   1篇
理论方法论   1747篇
综合类   187篇
社会学   9898篇
统计学   3759篇
  2023年   131篇
  2022年   91篇
  2021年   133篇
  2020年   346篇
  2019年   513篇
  2018年   607篇
  2017年   790篇
  2016年   610篇
  2015年   408篇
  2014年   569篇
  2013年   3509篇
  2012年   733篇
  2011年   681篇
  2010年   499篇
  2009年   403篇
  2008年   531篇
  2007年   485篇
  2006年   522篇
  2005年   407篇
  2004年   419篇
  2003年   350篇
  2002年   363篇
  2001年   468篇
  2000年   412篇
  1999年   402篇
  1998年   311篇
  1997年   261篇
  1996年   278篇
  1995年   288篇
  1994年   246篇
  1993年   256篇
  1992年   299篇
  1991年   294篇
  1990年   288篇
  1989年   253篇
  1988年   238篇
  1987年   201篇
  1986年   229篇
  1985年   249篇
  1984年   216篇
  1983年   191篇
  1982年   159篇
  1981年   130篇
  1980年   155篇
  1979年   170篇
  1978年   133篇
  1977年   114篇
  1976年   87篇
  1975年   91篇
  1974年   93篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
This article analyzes the moral tones of public emigration stories through an exploratory analysis of newspaper stories published between 1990 and 1993 in a region in Poland with a century-old tradition of out-migration. Media stories are fertile ground for examining values and myths because they negotiate between the micro-level process of individuals constructing meanings and the macro-level process of political economies producing meanings. I identified two sets of contradictory stories: (1) stories about the sending country cast emigrants as either home builders or home wreckers, and (2) stories about the receiving country depicted America as either Horatio Alger's land of possibility or a morally degenerate place where greed corrupts the soul. To explain these contradictions, I compare the institution of migration to (post)modern culture and note that both contribute to social diversity and structural differentiation which lead to value inconsistencies.  相似文献   
992.
Fetal Alcohol Syndrome (FAS) is currently the major cause of mental retardation in the Western world. Since FAS is not a natural phenomenon and is created by mixing alcohol and pregnancy, the solution to decreasing the incidence of all alcohol-related birth defects is therefore entirely preventable. To date, little is known about the effectiveness of prevention programs in reducing the incidence of FAS. Therefore, it is the intention of this article to review the effectiveness of prevention programs in lowering the incidence of FAS. The present review revealed that prevention programs, to date, have been successful in raising awareness of FAS levels across the groups examined. However, this awareness has not been translated into behavioral changes in "high risk" drinkers as consumption levels in this group have decreased only marginally, indicating prevention programs have had minimal or no impact in lowering the incidence of FAS. Urgent steps must now be taken to fully test prevention programs, and find new strategies involving both sexes, to reduce and ultimately eliminate the incidence of FAS.  相似文献   
993.
As the numbers of caregivers continue to increase, more attention is being focused on the unique stresses these individuals experience. Caring for a loved one tests the limits of even the most resilient, regardless of professional status or experience. Laughter is a universal elixir which allows people to cope more sanely with stress and caregiving responsibilities. Research on the emotional and physical benefits of laughter supports the use of humor by professionals and family members who occupy caregiving roles. This article addresses this research and examines common caregiver emotions while providing concrete guidelines for developing humor. Case examples demonstrate how laughter and wit are utilized by those caring for a loved one.  相似文献   
994.
A system that includes a number of terrorist cells is considered. The cells can consist of one or more terrorists. The current number of terrorist cells is further denoted by N(t), where t is a current time counted from any appropriate origin. The objective is to find the evolution of the system in terms of N(t) and some interpretable parameters, such as the initial number of the terrorist cells N0=N(0), the cell disabling rate constant lambda (or the cell half-life t1/2), and the rate of formation of new cells P. The cost-effectiveness analysis, performed in the framework of the model, reveals that the effectiveness of disabling a terrorist cell is getting worse after 2-3 half-lives of a cell, which shows that if the anti-terrorist actions have not reached their goal during that time, the respective policy should be considered for revision, using the risk assessment consideration. Another important issue raised concerns balancing the efforts related to counterterrorism actions inside the system and the efforts protecting its borders. The respective data analysis is suggested and illustrated using simulated data.  相似文献   
995.
996.
997.
998.
999.
1000.
An examination of 1970–1980 census data for suburban Chicago indicates that, within the context of persisting inequities, causal links between community characteristics and status change vary by initial status. Individual change in the relative rankings of initially affluent communities is a direct function of housing age and location; residential development and changes in population size have little or no effect on this process. In contrast, cyclical growth is the primary determinant of status change among places of lesser initial affluence. Within the larger context of centrifugal drift and age-related growth cycles, stronger growth and resulting status improvements occur in accessible, underdeveloped newer places that, due to recent suburbanization, have already attained somewhat higher rankings.  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