全文获取类型
收费全文 | 8965篇 |
免费 | 146篇 |
国内免费 | 1篇 |
专业分类
管理学 | 1222篇 |
民族学 | 35篇 |
人口学 | 801篇 |
丛书文集 | 41篇 |
理论方法论 | 770篇 |
综合类 | 147篇 |
社会学 | 4030篇 |
统计学 | 2066篇 |
出版年
2020年 | 125篇 |
2019年 | 184篇 |
2018年 | 186篇 |
2017年 | 272篇 |
2016年 | 190篇 |
2015年 | 175篇 |
2014年 | 202篇 |
2013年 | 1634篇 |
2012年 | 273篇 |
2011年 | 228篇 |
2010年 | 206篇 |
2009年 | 182篇 |
2008年 | 259篇 |
2007年 | 251篇 |
2006年 | 213篇 |
2005年 | 189篇 |
2004年 | 174篇 |
2003年 | 144篇 |
2002年 | 163篇 |
2001年 | 207篇 |
2000年 | 181篇 |
1999年 | 165篇 |
1998年 | 139篇 |
1997年 | 138篇 |
1996年 | 139篇 |
1995年 | 117篇 |
1994年 | 97篇 |
1993年 | 133篇 |
1992年 | 150篇 |
1991年 | 132篇 |
1990年 | 142篇 |
1989年 | 120篇 |
1988年 | 116篇 |
1987年 | 116篇 |
1986年 | 106篇 |
1985年 | 90篇 |
1984年 | 126篇 |
1983年 | 107篇 |
1982年 | 104篇 |
1981年 | 73篇 |
1980年 | 98篇 |
1979年 | 112篇 |
1978年 | 77篇 |
1977年 | 85篇 |
1976年 | 72篇 |
1975年 | 88篇 |
1974年 | 70篇 |
1973年 | 60篇 |
1972年 | 63篇 |
1971年 | 53篇 |
排序方式: 共有9112条查询结果,搜索用时 15 毫秒
871.
Robust tests for comparing scale parameters, based on deviances—absolute deviations from the median—are examined. Higgins (2004) proposed a permutation test for comparing two treatments based on the ratio of deviances, but the performance of this procedure has not been investigated. A simulation study examines the performance of Higgins’ test relative to other tests of scale utilizing deviances that have been shown in the literature to have good properties. An extension of Higgins’ procedure to three or more treatments is proposed, and a second simulation study compares its performance to other omnibus tests for comparing scale. While no procedure emerged as a preferred choice in every scenario, Higgins’ tests are found to perform well overall with respect to Type I error rate and power. 相似文献
872.
873.
874.
Frederick H. Gilman 《Journal of the American Statistical Association》2013,108(91):283-285
875.
Fisher information contained in record values, inter-record times and their concomitants from a sample of fixed size is derived in general and explicit expressions are deduced for some specific known bivariate classes of distributions. A comparison between fixed sampling and inverse sampling schemes with equal number of records and concomitants is also carried out. We also consider parameter estimation based on bivariate records and a small simulation study is done. 相似文献
876.
S. H. Ong 《Statistics》2013,47(4):403-411
We consider two-sided Bayesian tolerance intervals, with approximate frequentist validity, for a future observation in balanced one-way and two-way nested random effects models. Probability matching conditions, specific to this problem, are derived in either case via a technique that involves inversion of approximate posterior characteristic functions. In addition to yielding probability matching priors for the present problem, these conditions are useful in evaluating certain other priors that have received attention in the literature. 相似文献
877.
S. H. Ong 《Statistics》2013,47(3):291-302
In this paper, we consider the preliminary test approach for the estimation of the regression parameter in a multiple regression model under a multicollinearity situation. The preliminary test two-parameter estimators based on the Wald (W), likelihood ratio, and Lagrangian multiplier tests are given, when it is suspected that the regression parameter may be restricted to a subspace and the regression error is distributed with multivariate Student's t distribution. The bias and mean square error of the proposed estimators are derived and compared. The conditions of superiority of the proposed estimators are obtained. Finally, we conclude that the optimum choice of the level of significance becomes the traditional choice by using the Wald test. 相似文献
878.
W.G.Cochran: Sampling Techniques, 3rd. Ed. John Wiley & Sons, New York-Santa Barbara-London-Sydney-Toronto 1977. 428 S., £ 12.50; $21.50. H.Toutenburg: Vorhersage in linearen Modellen. Akademie-Verlag, Berlin 1975, VIII, 176b S., 3 Tab., 28,– M. O.Kallenberg: Random Measure. Akademie-Verlag, Berlin 1975; Academic Press, London 1976. 104 pp., 28,– M. 相似文献
879.
Box–Cox together with our newly proposed transformation were implemented in three different real world empirical problems to alleviate noisy and the volatility effect of them. Consequently, a new domain was constructed. Subsequently, universe of discourse for transformed data was established and an approach for calculating effective length of the intervals was then proposed. Considering the steps above, the initial forecasts were performed using frequently used fuzzy time series (FTS) methods on transformed data. Final forecasts were retrieved from initial forecasted values by proper inverse operation. Comparisons of the results demonstrate that the proposed method produced more accurate forecasts compared with existing FTS on original data. 相似文献
880.