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   20370篇
  免费   341篇
  国内免费   1篇
管理学   2674篇
民族学   81篇
人才学   1篇
人口学   1760篇
丛书文集   108篇
教育普及   2篇
理论方法论   1866篇
综合类   462篇
社会学   9776篇
统计学   3982篇
  2023年   105篇
  2020年   298篇
  2019年   383篇
  2018年   406篇
  2017年   630篇
  2016年   454篇
  2015年   381篇
  2014年   428篇
  2013年   3470篇
  2012年   626篇
  2011年   515篇
  2010年   390篇
  2009年   392篇
  2008年   472篇
  2007年   488篇
  2006年   394篇
  2005年   509篇
  2004年   429篇
  2003年   388篇
  2002年   407篇
  2001年   477篇
  2000年   436篇
  1999年   439篇
  1998年   326篇
  1997年   320篇
  1996年   332篇
  1995年   289篇
  1994年   281篇
  1993年   303篇
  1992年   358篇
  1991年   338篇
  1990年   327篇
  1989年   317篇
  1988年   291篇
  1987年   287篇
  1986年   278篇
  1985年   253篇
  1984年   310篇
  1983年   294篇
  1982年   254篇
  1981年   191篇
  1980年   220篇
  1979年   264篇
  1978年   198篇
  1977年   189篇
  1976年   169篇
  1975年   180篇
  1974年   160篇
  1973年   142篇
  1972年   114篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Approximations of the Bayesian estimators of the survival function based on the censored data of the log-logistic distribution are obtained under squared-error and log-odds squared-error loss functions. A numerical example is presented. Through a Monte Carlo simulation study, the behavior of the approximations found by Tierney & Kadane and Lindley are compared with a method suggested by Weiss & Howlader.  相似文献   
122.
The author reports on a study of the liquid nitrogen treatment of warts at the Rutgers University Student Health Center. He demonstrates that liquid nitrogen therapy is a safe, effective treatment method, appropriate for use by nurses and other primary providers in a college health setting.  相似文献   
123.
124.
Although empathy has been found to distinguish effective counsellors from less effective counsellors, human services professionals who continually experience negative emotional reactions to the feelings that clients express in counselling may be at risk of developing burnout. This study examined the hypothesis that emotional empathy rather than cognitive empathy is associated with burnout. The sample of human services professionals consisted of 71 Salvation Army Officers. Multiple regression was used to investigate whether the dimensions of empathy could predict three aspects of burnout: personal accomplishment, emotional exhaustion and depersonalization. The first regression analysis indicated that personal distress and empathic concern were significant predictor of personal accomplishment. The second analysis indicated that personal distress was a significant predictor of emotional exhaustion. The third indicated that empathic concern was a significant predictor of depersonalization. Although these results support the hypothesis, personal distress was negatively associated with personal accomplishment, whereas empathic concern was positively associated with personal accomplishment. The small size of the sample may have influenced the reliability of the findings. A multidimensional approach to the role of empathy in counselling may help human services professionals to manage their emotional reactions when they engage in counselling with distressed clients.  相似文献   
125.
The goal of Louisiana's 1990–1991 comparative risk project, also called the Louisiana Environmental Action Plan (LEAP), was to incorporate risk assessment into state environmental planning and policymaking. Scientists, government officials, and citizens were brought together to estimate the relative risk to human health, natural resources, and quality of life posed by 33 selected environmental issues. The issues were then ranked according to their relative estimated risks. It was hoped that this ranking of "comparative risks" would enable state policymakers to target the most important environmental problems and allocate scarce public resources more rationally and efficiently. As a result of the project, the governor issued an Executive Order forming a permanent Public Advisory Committee to continue this type of comparative risk assessment in Louisiana.  相似文献   
126.
Since children, particularly daughters, are among the most important sources of help and support for older Americans, it has been suggested that women's increasing employment will affect filial relations. Empirical evidence on this issue is inconsistent, in part due to the use of nonprobability samples. Few studies have measured effects for men. We attempt to broaden the scope of this question beyond help to the frail elderly by asking whether employment affects filial relations in general. We examine effects of hours employed on telephone contact, visiting, feelings of closeness, filial attitudes, and assistance to biological parents, for an area probability sample of men and women over 40. There are no effects of employment for men or women on contact, closeness, or assistance. For the vast majority of this population sample, contact and assistance involve few hours per week, and thus do not seem to conflict with employment.  相似文献   
127.
128.
129.
130.
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