全文获取类型
收费全文 | 6977篇 |
免费 | 183篇 |
专业分类
管理学 | 1113篇 |
民族学 | 31篇 |
人才学 | 6篇 |
人口学 | 673篇 |
丛书文集 | 18篇 |
理论方法论 | 568篇 |
综合类 | 78篇 |
社会学 | 3192篇 |
统计学 | 1481篇 |
出版年
2023年 | 52篇 |
2022年 | 37篇 |
2021年 | 51篇 |
2020年 | 99篇 |
2019年 | 162篇 |
2018年 | 217篇 |
2017年 | 288篇 |
2016年 | 212篇 |
2015年 | 144篇 |
2014年 | 177篇 |
2013年 | 1170篇 |
2012年 | 271篇 |
2011年 | 191篇 |
2010年 | 176篇 |
2009年 | 169篇 |
2008年 | 162篇 |
2007年 | 190篇 |
2006年 | 191篇 |
2005年 | 154篇 |
2004年 | 152篇 |
2003年 | 117篇 |
2002年 | 158篇 |
2001年 | 177篇 |
2000年 | 136篇 |
1999年 | 135篇 |
1998年 | 105篇 |
1997年 | 109篇 |
1996年 | 82篇 |
1995年 | 82篇 |
1994年 | 96篇 |
1993年 | 84篇 |
1992年 | 100篇 |
1991年 | 86篇 |
1990年 | 87篇 |
1989年 | 81篇 |
1988年 | 99篇 |
1987年 | 86篇 |
1986年 | 77篇 |
1985年 | 87篇 |
1984年 | 71篇 |
1983年 | 74篇 |
1982年 | 67篇 |
1981年 | 63篇 |
1980年 | 62篇 |
1979年 | 77篇 |
1978年 | 62篇 |
1977年 | 51篇 |
1976年 | 60篇 |
1975年 | 59篇 |
1973年 | 38篇 |
排序方式: 共有7160条查询结果,搜索用时 15 毫秒
11.
A finite mixture model using the multivariate t distribution has been shown as a robust extension of normal mixtures. In this paper, we present a Bayesian approach for inference about parameters of t-mixture models. The specifications of prior distributions are weakly informative to avoid causing nonintegrable posterior distributions. We present two efficient EM-type algorithms for computing the joint posterior mode with the observed data and an incomplete future vector as the sample. Markov chain Monte Carlo sampling schemes are also developed to obtain the target posterior distribution of parameters. The advantages of Bayesian approach over the maximum likelihood method are demonstrated via a set of real data. 相似文献
12.
13.
The study investigates Swedish male and female social workers’ assessments and help-giving strategies towards single parents applying for income support. The study was carried out with the help of a vignette distributed as a mail questionnaire. Results show that social workers tend to conform to assessments and help-giving strategies that are consistent with expectations linked to their own gender role. 相似文献
14.
A. F. Bissell 《Journal of applied statistics》1992,19(2):193-210
The fitting of a straight line that must pass through (0, 0) is a frequently encountered application of linear regression. Many computer packages provide a least-squares option sometimes identified as NO INT, or even NOINT, or as ‘suppressing the intercept’. Often these procedures are invalid or do not correspond to the most suitable model. This paper questions the least-squares-line approach and suggests some alternatives. Two measures are proposed for comparing the fit of alternative models. 相似文献
15.
16.
17.
A. F. Bissell 《Journal of applied statistics》1992,19(3):351-366
In a previous paper (Bissell, 1989) some suggestions were offered for interpreting mean squares in saturated fractional designs where no independent estimate of experimental error is available. One of the methods leads to a simple numerical test of homogeneity which provides an objective accompaniment to half-Normal plotting of effects (Daniel, 1959) in 2n designs or exponential plotting of mean squares (Bissell, 1989) in 3n designs. A table of percentage points for a convenient test statistic is provided in this paper. 相似文献
18.
19.
Martina Löw 《Soziologie》2006,35(2):222-224
Ohne Zusammenfassung 相似文献
20.
Philip L. H. Yu K. F. Lam S. M. Lo 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》2005,168(3):583-597
Summary. Factor analysis is a powerful tool to identify the common characteristics among a set of variables that are measured on a continuous scale. In the context of factor analysis for non-continuous-type data, most applications are restricted to item response data only. We extend the factor model to accommodate ranked data. The Monte Carlo expectation–maximization algorithm is used for parameter estimation at which the E-step is implemented via the Gibbs sampler. An analysis based on both complete and incomplete ranked data (e.g. rank the top q out of k items) is considered. Estimation of the factor scores is also discussed. The method proposed is applied to analyse a set of incomplete ranked data that were obtained from a survey that was carried out in GuangZhou, a major city in mainland China, to investigate the factors affecting people's attitude towards choosing jobs. 相似文献