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   2367篇
  免费   104篇
管理学   280篇
民族学   22篇
人口学   247篇
丛书文集   12篇
理论方法论   288篇
综合类   30篇
社会学   1071篇
统计学   521篇
  2023年   30篇
  2022年   9篇
  2021年   29篇
  2020年   68篇
  2019年   103篇
  2018年   117篇
  2017年   141篇
  2016年   85篇
  2015年   65篇
  2014年   85篇
  2013年   493篇
  2012年   99篇
  2011年   96篇
  2010年   82篇
  2009年   60篇
  2008年   75篇
  2007年   72篇
  2006年   71篇
  2005年   59篇
  2004年   42篇
  2003年   52篇
  2002年   47篇
  2001年   45篇
  2000年   29篇
  1999年   39篇
  1998年   24篇
  1997年   20篇
  1996年   24篇
  1995年   23篇
  1994年   22篇
  1993年   24篇
  1992年   28篇
  1991年   25篇
  1990年   10篇
  1989年   13篇
  1988年   12篇
  1987年   12篇
  1986年   8篇
  1985年   15篇
  1984年   15篇
  1983年   15篇
  1982年   10篇
  1981年   17篇
  1980年   10篇
  1979年   8篇
  1978年   5篇
  1976年   5篇
  1975年   8篇
  1974年   9篇
  1966年   3篇
排序方式: 共有2471条查询结果,搜索用时 296 毫秒
211.
212.
213.
214.
Sexual minority youth, including emerging adults, are at risk for negative health outcomes. Minority stress theory posits that heterosexism can contribute to these outcomes among sexual minorities. Researchers have tested this theory with respect to interpersonal heterosexism; however, little attention has been given to macro-level and environmental forms of heterosexism, especially among lesbian, gay, bisexual, and queer (LGBQ) youth. In this study, we examine the role of objective social climate (LGB state-level policies) and experiential distal and proximal environmental microaggressions on the psychological well-being of LGBQ emerging adults. Furthermore, we examine the role of LGBQ identity salience as a moderating factor on the macro/environmental-heterosexism and well-being relationship. Multivariable linear regression results suggest that living in a state without same-sex marriage laws is associated with greater self-esteem, whereas both distal and proximal environmental microaggressions are risk factors for anxiety and perceived stress. Furthermore, identity salience can ameliorate the effects of distal microaggressions and intensify the effects of proximal microaggressions and same-sex marriage legislation. Implications for practice with sexual minority youth are discussed.  相似文献   
215.
This article considers short memory characteristics in a long memory process. We derive new asymptotic results for the sample autocorrelation difference ratios. We used these results to develop a new portmanteau test that determines if short memory parameters are statistically significant. In simulations, the new test can detect short memory components more often than the Ljung-Box test when these short memory components are in fact within a long memory process. Interestingly, our test finds short memory autocorrelations in U.S. inflation rate data, whereas the Ljung-Box test fails to find these autocorrelations. Modeling these short memory autocorrelations of the inflation rate data leads to improved model accuracy and more precise prediction.  相似文献   
216.
In binary classifications, a decision tree learned from unbalanced data typically creates an important challenge related to the high misclassification rate of the minority class. Assigning different misclassification costs can address this problem, though usually at the cost of accuracy for the majority class. This effect can be particularly hazardous if the costs cannot be specified precisely. When the costs are unknown or difficult to determine, decision makers may prefer a classifier with more balanced accuracy for both classes rather than a standard or cost‐sensitively learned one. In the context of learning trees, this research therefore proposes a new tree induction approach called subtree grafting (STG). On the basis of a real bank data set and several other data sets, we test the proposed STG method and find that our proposed approach provides a successful compromise between standard and cost‐sensitive trees.  相似文献   
217.
Clinical Social Work Journal - Trauma is a significant public health concern that has widespread and adverse effects on people. There is a high prevalence of trauma and PTSD in general populations,...  相似文献   
218.
219.
Population Research and Policy Review - This study aims to examine how income-based hypergamy among South Korean women affects the marriage rate. In a society that continues to practice income...  相似文献   
220.
The Armey curve developed by [Armey, R. (1995). The freedom revolution. Washington, DC: Rognery Publishing Co.] and [Vedder, R. K., & Gallaway, L. E. (1998). Government size and economic growth. Joint Economic Committee] demonstrates that there is a non-linear relationship between government size and economic growth. In order to search for the threshold effects, this paper employs [Hansen, B. E. (2000). Sample splitting and threshold estimation. Econometrica, 68(3), 575–603] threshold regression model to test whether the Armey curve exists in Taiwan, allowing for endogenous government size thresholds. We apply the two-sector production function developed by [Ram, R. (1986). Government size and economic growth: A new framework and some evidence from cross-section and time-series data. American Economic Review, 76(1), 191–203] to construct the threshold regression model. Three classifications of government size are tested in sequence as threshold variables. The result indicates that all three classifications of government size have a threshold effect and that a non-linear relationship of the Armey curve exists in Taiwan.  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