全文获取类型
收费全文 | 1248篇 |
免费 | 31篇 |
国内免费 | 17篇 |
专业分类
管理学 | 186篇 |
劳动科学 | 1篇 |
人口学 | 19篇 |
丛书文集 | 38篇 |
理论方法论 | 190篇 |
综合类 | 301篇 |
社会学 | 29篇 |
统计学 | 532篇 |
出版年
2023年 | 4篇 |
2022年 | 6篇 |
2021年 | 11篇 |
2020年 | 15篇 |
2019年 | 30篇 |
2018年 | 36篇 |
2017年 | 39篇 |
2016年 | 21篇 |
2015年 | 29篇 |
2014年 | 55篇 |
2013年 | 230篇 |
2012年 | 73篇 |
2011年 | 48篇 |
2010年 | 41篇 |
2009年 | 43篇 |
2008年 | 63篇 |
2007年 | 71篇 |
2006年 | 65篇 |
2005年 | 59篇 |
2004年 | 37篇 |
2003年 | 38篇 |
2002年 | 37篇 |
2001年 | 43篇 |
2000年 | 24篇 |
1999年 | 29篇 |
1998年 | 13篇 |
1997年 | 12篇 |
1996年 | 11篇 |
1995年 | 12篇 |
1994年 | 8篇 |
1993年 | 15篇 |
1992年 | 9篇 |
1991年 | 8篇 |
1990年 | 9篇 |
1989年 | 13篇 |
1988年 | 12篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 3篇 |
1978年 | 5篇 |
1977年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有1296条查询结果,搜索用时 875 毫秒
171.
A well-known theorem of Blackwell states that, when quantity of information is properly defined, every expected utility decision maker prefers more information to less; for more general preferences, however, the theorem is no longer true. In this article, we investigate the extent to which Blackwell's Theorem does not hold and describe conditions, and situations, under which information is still valuable. We also show that, for many types of additions of information, there exists a decision maker who will reject this information.We thank Niv Ahituv, Larry Epstein, Uzi Segal, and an anonymous referee for their helpful comments. This article was partially financed by the Israel Institute of Business Research. 相似文献
172.
张玲 《贵州大学学报(社会科学版)》2004,22(1):90-94
本文对沈从文文学观念的几个方面,即"生命"美学观、"文学自由"论和文学功利观作了简要概括,并在现代文学理论史的背景上对其文学观念进行了一定的评价。在此基础上分析指出沈从文的文学观念同"改造民族灵魂"的基本文学观念的一致性,以及在"湘西价值"坚守下的独特性,从中探索沈从文对现代文学理论创作的启发意义和深远影响。 相似文献
173.
黄华一 《电子科技大学学报(社会科学版)》2004,6(3):15-17
本文通过对价格与效用的关系论述,提出商品价格的最终决定因素是商品的效用,商品的效用越大,则商品的价格越高.同时,通过引入效用函数,推导出了边际效用与价格之间的关系,从数学方面证明了价格与效用之间存在着正向比例关系.并籍此认为,西方效用论的谬误之处在于将价格与价值的概念混为一谈. 相似文献
174.
175.
David R. Bickel 《统计学通讯:理论与方法》2013,42(8):1478-1496
By representing fair betting odds according to one or more pairs of confidence set estimators, dual parameter distributions called confidence posteriors secure the coherence of actions without any prior distribution. This theory reduces to the maximization of expected utility when the pair of posteriors is induced by an exact or approximate confidence set estimator or when a reduction rule is applied to the pair. Unlike the p-value, the confidence posterior probability of an interval hypothesis is suitable as an estimator of the indicator of hypothesis truth since it converges to 1 if the hypothesis is true or to 0 otherwise. 相似文献
176.
The Akaike Information Criterion (AIC) is developed for selecting the variables of the nested error regression model where an unobservable random effect is present. Using the idea of decomposing the likelihood into two parts of “within” and “between” analysis of variance, we derive the AIC when the number of groups is large and the ratio of the variances of the random effects and the random errors is an unknown parameter. The proposed AIC is compared, using simulation, with Mallows' C p , Akaike's AIC, and Sugiura's exact AIC. Based on the rates of selecting the true model, it is shown that the proposed AIC performs better. 相似文献
177.
178.
Haim Shore 《统计学通讯:理论与方法》2013,42(9):1819-1841
A statistical distribution of a random variable is uniquely represented by its normal-based quantile function. For a symmetrical distribution it is S-shaped (for negative kurtosis) and inverted S-shaped (otherwise). As skewness departs from zero, the quantile function gradually transforms into a monotone convex function (positive skewness) or concave function (otherwise). Recently, a new general modeling platform has been introduced, response modeling methodology, which delivers good representation to monotone convex relationships due to its unique “continuous monotone convexity” property. In this article, this property is exploited to model the normal-based quantile function, and explored using a set of 27 distributions. 相似文献
179.
Katarzyna Budny 《统计学通讯:理论与方法》2013,42(17):5220-5223
ABSTRACTWe extend Chebyshev's inequality to a random vector with a singular covariance matrix. Then we consider the case of a multivariate normal distribution for this generalization. 相似文献
180.
ABSTRACTIn this article, we consider a two-phase tandem queueing model with a second optional service and random feedback. The first phase of service is essential for all customers and after the completion of the first phase of service, any customer receives the second phase of service with probability α, feedback to the tail of the first queue with probability β if the service is not successful and leaves the system with probability 1 ? α ? β. In this model, our main purpose is to estimate the parameters of the model, traffic intensity, and mean system size, in the steady state, via maximum likelihood and Bayesian methods. Furthermore, we find asymptotic confidence intervals for mean system size. Finally, by a simulation study, we compute the confidence levels and mean length for asymptotic confidence intervals of mean system size with a nominal level 0.95. 相似文献