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   14558篇
  免费   257篇
  国内免费   1篇
管理学   1895篇
民族学   62篇
人才学   1篇
人口学   1172篇
丛书文集   85篇
教育普及   3篇
理论方法论   1356篇
综合类   135篇
社会学   7733篇
统计学   2374篇
  2023年   73篇
  2021年   73篇
  2020年   173篇
  2019年   259篇
  2018年   305篇
  2017年   418篇
  2016年   319篇
  2015年   246篇
  2014年   316篇
  2013年   2827篇
  2012年   392篇
  2011年   380篇
  2010年   292篇
  2009年   279篇
  2008年   322篇
  2007年   324篇
  2006年   350篇
  2005年   327篇
  2004年   284篇
  2003年   267篇
  2002年   289篇
  2001年   334篇
  2000年   313篇
  1999年   331篇
  1998年   217篇
  1997年   217篇
  1996年   277篇
  1995年   248篇
  1994年   252篇
  1993年   266篇
  1992年   276篇
  1991年   260篇
  1990年   282篇
  1989年   247篇
  1988年   228篇
  1987年   209篇
  1986年   187篇
  1985年   202篇
  1984年   215篇
  1983年   159篇
  1982年   159篇
  1981年   147篇
  1980年   145篇
  1979年   137篇
  1978年   119篇
  1977年   113篇
  1976年   112篇
  1975年   101篇
  1974年   67篇
  1973年   73篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
241.
Recent patterns of Hispanic immigration to the United States are examined using data from the U.S. Immigration and Naturalization Service. "From 1960 to 1978 Hispanic immigration increased significantly, reflecting the general acceleration in total immigration to the United States. Demographic trends reveal that Hispanic immigrants are increasingly working-age women. Their occupation composition is primarily blue collar, with operatives emerging as the predominant job category during the 1970s." The authors note that these immigrants settle primarily in a small number of urban centers of Hispanic population and culture in the United States, and thus the effects of immigration will be concentrated on the low-skill segment of particular urban labor markets that already contain large numbers of Hispanic workers.  相似文献   
242.
All for health     
Jayatilaka AD 《Zambezia》1983,11(1):15-35
  相似文献   
243.
A series of seven studies was conducted by the authors and their colleagues to produce an efficient measure of service satisfaction that can easily be related to symptom level, demographic characteristics, and type and extent of service utilization. The resulting measure, the Service Evaluation Questionnaire (SEQ) is a brief, global index that has excellent internal consistency and solid psychometric properties. Data from an extensive SEQ field study can be used as a comparison base for future applications of the two SEQ component scales, the CSQ-8 and the SCL-10. A new hypothesis has emerged from this series of studies that will guide future research: Service recipients may find if difficult to formally express dissatisfaction in the face of significant caring--however ineffectual--when the technical capacity to offer definitive treatment is not yet fully developed and when criteria for evaluating the efficacy of treatment are not yet crystal clear.  相似文献   
244.
245.
An analysis of the brain drain from the Andean countries of Bolivia, Chile, Colombia, Ecuador, and Peru to the United States is presented. The data are from a survey of 62 persons from those countries who are currently residing in the United States and are listed in the current edition of "American Men and Women of Science". The reasons why they left their country of origin and are staying in the United States are considered. (summary in FRE, SPA)  相似文献   
246.
Errata     
My article entitled "Replications, Significance Tests, and Confidencein Findings in Survey Research" (POQ 47:261–69) is marredby a serious error which has implications for most of the contentsof the article. Table 1, which is adapted from a table published by Rosenthaland Hall,1 gives the critical values of required for significance at several levels; itdoes not give the critical values of Trans , or () (). Rather, the latter should be referreddirectly to a table giving the areas under the normal curve,or, in other words, it should be treated as though it were aZ from a single-sample test. This means that the comparisons of significance test resultsfrom pooled data and from series of replications in Tables 2and 3 do not support the conclusion that using a replicate designrather than pooled data lessens the probability of Type II errors.In the case of Table 2, the probability from the pooled sampleis lower than the correct one from the series of replications,and in the case of Table 3, the probabilities are about thesame. The data in Table 4 illustrate a kind of situation in whicha replicate design may be the preferred one for another reason.The replicate design allows an estimate of sampling variabilityfrom the actual variability among a small number of samples,whereas the single-sample and pooled-sample significance testresults may be substantially in error due to the unstable meaningof the "zero" assigned to the reference category for the dummyvariables. However, the estimated probability for the arrayof replications should be .05 rather than the probability reported. Another error with less serious implications for the paper asa whole is that the third "alternative formula" for Trans is incorrect as printed. One of thefirst two formulas, or () (), should be used instead. The major error resulted from a misreading of the paper by Rosenthaland Hall. I apologize to Rosenthal and Hall and to any readersof my paper who have used the table of critical values incorrectlyin their research.  相似文献   
247.
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