全文获取类型
收费全文 | 439篇 |
免费 | 11篇 |
国内免费 | 1篇 |
专业分类
管理学 | 36篇 |
人口学 | 2篇 |
丛书文集 | 8篇 |
理论方法论 | 13篇 |
综合类 | 56篇 |
社会学 | 5篇 |
统计学 | 331篇 |
出版年
2023年 | 6篇 |
2022年 | 1篇 |
2021年 | 6篇 |
2020年 | 8篇 |
2019年 | 6篇 |
2018年 | 10篇 |
2017年 | 15篇 |
2016年 | 9篇 |
2015年 | 17篇 |
2014年 | 14篇 |
2013年 | 141篇 |
2012年 | 31篇 |
2011年 | 15篇 |
2010年 | 12篇 |
2009年 | 8篇 |
2008年 | 11篇 |
2007年 | 12篇 |
2006年 | 10篇 |
2005年 | 17篇 |
2004年 | 15篇 |
2003年 | 19篇 |
2002年 | 10篇 |
2001年 | 8篇 |
2000年 | 5篇 |
1999年 | 4篇 |
1998年 | 3篇 |
1997年 | 6篇 |
1996年 | 3篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 5篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 4篇 |
1983年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有451条查询结果,搜索用时 281 毫秒
101.
AbstractRepeated Measurements Designs have been widely used in agriculture, animal husbandry, education, biology, botany and engineering. Balanced or strongly balanced repeated measurements designs are useful to balance out the residual effects. In this article, some new generators and construction procedures are proposed to obtain circular strongly balanced repeated measurements designs in periods of (a) equal sizes, (b) two different sizes, and (c) three different sizes. 相似文献
102.
Subhash C. Sharma 《Australian & New Zealand Journal of Statistics》1985,27(2):138-150
In this paper, we investigate the effects of correlation among observations on the accuracy of approximating the distribution of sample mean by its asymptotic distribution. The accuracy is investigated by the Berry-Esseen bound (BEB), which gives an upper bound on the error of approximation of the distribution function of the sample mean from its asymptotic distribution for independent observations. For a given sample size (n0) the BEB is obtained when the observations are independent. Let this be BEB. We then find the sample size (n*) required to have BEB below BEB0, when the observations are dependent. Comparison of n* with n0 reveals the effects of correlation among observations on the accuracy of the asymptotic distribution as an approximation. It is shown that the effects of correlation among observations are not appreciable if the correlation is moderate to small but it can be severe for extreme correlations. 相似文献
103.
A. Azzalini 《Statistical Methods and Applications》1994,3(2):169-179
Summary We consider the analysis of discrete serially correlated data in the presence of time dependent covariates. If the interest
is to relate the covariates to the marginal distribution of the data, Markov chains are an obvious tool to consider, but their
use is complicated by the fact that they are expressed in terms of transitional rather than marginal probabilities. We show
how to parametrize the transition matrix in a suitable way so that interpretation is as desired. The focus is on binary and
Poisson data, but the methodology can be adopted also with other discrete data distributions. 相似文献
104.
The p -variate Burr distribution has been derived, developed, discussed and deployed by various authors. In this paper a score statistic for testing independence of the components, equivalent to testing for p independent Weibull against a p -variate Burr alternative, is obtained. Its null and non-null properties are investigated with and without nuisance parameters and including the possibility of censoring. Two applications to real data are described. The test is also discussed in the context of other Weibull mixture models. 相似文献
105.
Linear mixed effects model (LMEM) is efficient in modeling repeated measures longitudinal data. However, little research has been done in developing goodness-of-fit measures that can evaluate the models, particularly those that can be interpreted in an absolute sense without referencing a null model. This paper proposes three coefficient of determination (R 2) as goodness-of-fit measures for LMEM with repeated measures longitudinal data. Theorems are presented describing the properties of R 2 and relationships between the R 2 statistics. A simulation study was conducted to evaluate and compare the R 2 along with other criteria from literature. Finally, we applied the proposed R 2 to a real virologic response data of an HIV-patient cohort. We conclude that our proposed R 2 statistics have more advantages than other goodness-of-fit measures in the literature, in terms of robustness to sample size, intuitive interpretation, well-defined range, and unnecessary to determine a null model. 相似文献
106.
This paper is concerned with the analysis of repeated measures count data overdispersed relative to a Poisson distribution, with the overdispersion possibly heterogeneous. To accommodate the overdispersion, the Poisson random variable is compounded with a gamma random variable, and both the mean of the Poisson and the variance of the gamma are modelled using log linear models. Maximum likelihood estimates (MLE) are then obtained. The paper also gives extended quasi-likelihood estimates for a more general class of compounding distributions which are shown to be approximations to the MLEs obtained for the gamma case. The theory is illustrated by modelling the determination of asbestos fibre intensity on membrane filters mounted on microscope slides. 相似文献
107.
中国绿色食品贸易中的信息障碍及其化解的制度安排 总被引:2,自引:0,他引:2
本文在分析中国绿色食品贸易中的信息障碍及其特殊性的基础上,认为现有的矫正信息不对称的理论及措施尚难以化解这一障碍,若要化解这一障碍,必须另辟蹊径。我们认为,健全的效率导向型的信号发送机制有利于化解信息不全所致的信息障碍,重复博弈和阻遏性规制等适当的制度安排可激励、约束供给方的行为。只有这样,中国绿色食品贸易才能形成市场需求(消费者)、微观经济主体(生产者)和社会生态环境(管理者)三大目标之间的“激励兼容”,促进绿色食品贸易的可持续发展。 相似文献
108.
Covariance matrices, or in general matrices of sums of squares and cross-products, are used as input in many multivariate analyses techniques. The eigenvalues of these matrices play an important role in the statistical analysis of data including estimation and hypotheses testing. It has been recognized that one or few observations can exert an undue influence on the eigenvalues of a covariance matrix. The relationship between the eigenvalues of the covariance matrix computed from all data and the eigenvalues of the perturbed covariance matrix (a covariance matrix computed after a small subset of the observations has been deleted) cannot in general be written in closed-form. Two methods for approximating the eigenvalues of a perturbed covariance matrix have been suggested by Hadi (1988) and Wang and Nyquist (1991) for the case of a perturbation by a single observation. In this paper we improve on these two methods and give some additional theoretical results that may give further insight into the problem. We also compare the two improved approximations in terms of their accuracies. 相似文献
109.
Eric Rasmusen 《Theory and Decision》1992,32(2):147-164
The fact that infinitely repeated games have many different equilibrium outcomes is known as the Folk Theorem. Previous versions of the Folk Theorem have characterized only the payoffs of the game. This paper shows that over a finite portion of an infinitely repeated game, the concept of perfect equilibrium imposes virtually no restrictions on observable behavior. The Prisoner's Dilemma is presented as an example and discussed in detail.I would like to thank an anonymous referee, Sushil Bikhchandani, David Hirshleifer, David Levine, Thomas Voss, and participants in the UCLA Game Theory Seminar for helpful comments. 相似文献
110.
陈小辉 《南华大学学报(社会科学版)》2018,(1):100-105
《全宋诗》著录诗人九千余人,卷帙浩繁,出之众人,因此不可避免会出现重收诗现象。对此,学界已做了不少修订工作,如陈新等人编著《全宋诗订补》、张如安《〈全宋诗〉订补稿》。近来,通过查阅文献,发现李建中、陈世卿、宋涛诸人名下还有二十余首诗歌与他人重出,故很有必要对这些诗的归属加以一一考证。 相似文献