全文获取类型
收费全文 | 3858篇 |
免费 | 102篇 |
国内免费 | 13篇 |
专业分类
管理学 | 180篇 |
民族学 | 1篇 |
人口学 | 37篇 |
丛书文集 | 21篇 |
理论方法论 | 17篇 |
综合类 | 317篇 |
社会学 | 24篇 |
统计学 | 3376篇 |
出版年
2024年 | 1篇 |
2023年 | 21篇 |
2022年 | 31篇 |
2021年 | 23篇 |
2020年 | 67篇 |
2019年 | 146篇 |
2018年 | 161篇 |
2017年 | 269篇 |
2016年 | 125篇 |
2015年 | 79篇 |
2014年 | 111篇 |
2013年 | 1151篇 |
2012年 | 345篇 |
2011年 | 95篇 |
2010年 | 117篇 |
2009年 | 132篇 |
2008年 | 121篇 |
2007年 | 90篇 |
2006年 | 90篇 |
2005年 | 88篇 |
2004年 | 75篇 |
2003年 | 60篇 |
2002年 | 66篇 |
2001年 | 62篇 |
2000年 | 59篇 |
1999年 | 59篇 |
1998年 | 53篇 |
1997年 | 43篇 |
1996年 | 24篇 |
1995年 | 20篇 |
1994年 | 26篇 |
1993年 | 19篇 |
1992年 | 24篇 |
1991年 | 8篇 |
1990年 | 15篇 |
1989年 | 9篇 |
1988年 | 17篇 |
1987年 | 8篇 |
1986年 | 6篇 |
1985年 | 4篇 |
1984年 | 12篇 |
1983年 | 13篇 |
1982年 | 6篇 |
1981年 | 5篇 |
1980年 | 1篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 2篇 |
1975年 | 2篇 |
1973年 | 1篇 |
排序方式: 共有3973条查询结果,搜索用时 401 毫秒
911.
An application of empirical Bayes and Kalman filtering tecniques is reported, using live data from Indian Statistical Institute (ISI), Calcutta . to illustrate how initial small domain estimators may be vastly improved upon. A stratified two stage sampling procedure is adopted, allowing selection of first stage units with unequal probabilities but of second stage units with equal probabilities. Standard design-based estimators for domain totals are initialized based on domain specific survey data alone. Strength is then borrowed across domains and from past surveys. The resulting gains in efficacy are numlerically demonstrated, through replicated sampling from official records. 相似文献
912.
913.
Consistency of the GMLE with Mixed Case Interval-Censored Data 总被引:1,自引:1,他引:0
In this paper we consider an interval censorship model in which the endpoints of the censoring intervals are determined by a two stage experiment. In the first stage the value k of a random integer is selected; in the second stage the endpoints are determined by a case k interval censorship model. We prove the strong consistency in the L 1 ( μ )-topology of the non-parametric maximum likelihood estimate of the underlying survival function for a measure μ which is derived from the distributions of the endpoints. This consistency result yields strong consistency for the topologies of weak convergence, pointwise convergence and uniform convergence under additional assumptions. These results improve and generalize existing ones in the literature. 相似文献
914.
In this article, we investigate the potential usefulness of the three-parameter transmuted Weibull distribution for modeling survival data. The main advantage of this distribution is that it has increasing, decreasing or constant instantaneous failure rate depending on the shape parameter and the new transmuting parameter. We obtain several mathematical properties of the transmuted Weibull distribution such as the expressions for the quantile function, moments, geometric mean, harmonic mean, Shannon, Rényi and q-entropies, mean deviations, Bonferroni and Lorenz curves, and the moments of order statistics. We propose a location-scale regression model based on the log-transmuted Weibull distribution for modeling lifetime data. Applications to two real datasets are given to illustrate the flexibility and potentiality of the transmuted Weibull family of lifetime distributions. 相似文献
915.
M. H. Tahir Gauss M. Cordeiro Ayman Alzaatreh M. Mansoor M. Zubair 《统计学通讯:模拟与计算》2016,45(10):3548-3567
Many distributions have been used as lifetime models. In this article, we propose a new three-parameter Weibull–Pareto distribution, which can produce the most important hazard rate shapes, namely, constant, increasing, decreasing, bathtub, and upsidedown bathtub. Various structural properties of the new distribution are derived including explicit expressions for the moments and incomplete moments, Bonferroni and Lorenz curves, mean deviations, mean residual life, mean waiting time, and generating and quantile functions. The Rényi and q entropies are also derived. We obtain the density function of the order statistics and their moments. The model parameters are estimated by maximum likelihood and the observed information matrix is determined. The usefulness of the new model is illustrated by means of two real datasets on Wheaton river flood and bladder cancer. In the two applications, the new model provides better fits than the Kumaraswamy–Pareto, beta-exponentiated Pareto, beta-Pareto, exponentiated Pareto, and Pareto models. 相似文献
916.
In this paper several nonparametric, non-Bayesian methods for estimating the failure rate function on which no monotonicity conditions have been imposed are surveyed. The survey attempts to consolidate and synthesize literature from several diverse areas of application, and endeavors to be as up-to-date as is feasible. 相似文献
917.
Shey Shiung Sheu 《The American statistician》2013,67(3):206-207
Econometrics textbooks make use of the assumption of a fixed regressor matrix, although it is nearly always unrealistic for economic data. For developing the properties of the general linear model, this is a convenient simplification. But this assumption is retained when examining model specification. This practice has generated results that, if not erroneous, are certainly incomplete and thus deceptive. In particular, the omission of a variable or the imposition of any incorrect restriction may well increase the variance of estimated parameters rather than reduce it, as stated in the textbooks. 相似文献
918.
This paper gives the results of a new simulation study for the familiar calibration problem and the less familiar inverse median estimation problem. The latter arises when one wishes to estimate from a linear regression analysis the value of the independent variable corresponding to a specified value of the median of the dependent variable. For example, from the results of a regression analysis between stress and time to failure, one might wish to estimate the stress at which the median time to failure is 10,000 hours. In the study, the mean square error, Pitman closeness, and probability of overestimation are compared for both the calibration problem and the inverse median estimation problem for (1) the classical estimator, (2) the inverse estimator, and (3) a modified version of an estimator proposed by Naszodi (1978) for both a small sample and a moderately large sample situation. 相似文献
919.
N. Sambamoorthi 《统计学通讯:理论与方法》2013,42(6):2087-2106
We discuss the issue of dimensionality reduction in multinomial logistic models as problems arising in variable selection, collapsibility of responses and linear restrictions in the parameter matrix. A method using the information theoretic criterion suggested by Bai, Krishnaiah and Zhao, a variation of Akaike information criterion, is used to estimate the rank of the parameter matrix. The same procedure is used for the selection of variables and collapsibility of response categories. The strong consistency of this procedure is established in all the problems. 相似文献
920.
《统计学通讯:理论与方法》2013,42(12):2601-2635
Through an appeal to asymptotic Gaussian representations of certain empirical stochastic processes, the techniques of continuous regression are applied to derive estimates for underlying parametric probability laws. This asymptotic regression approach yields estimates for a wide range of statistical problems, including estimation based on the empirical quantile function, Poisson process intensity estimation, and parametric density estimation. 相似文献