全文获取类型
收费全文 | 495篇 |
免费 | 10篇 |
专业分类
管理学 | 54篇 |
人口学 | 25篇 |
丛书文集 | 2篇 |
理论方法论 | 29篇 |
综合类 | 7篇 |
社会学 | 253篇 |
统计学 | 135篇 |
出版年
2020年 | 5篇 |
2019年 | 6篇 |
2018年 | 18篇 |
2017年 | 13篇 |
2016年 | 16篇 |
2015年 | 10篇 |
2014年 | 16篇 |
2013年 | 114篇 |
2012年 | 22篇 |
2011年 | 17篇 |
2010年 | 11篇 |
2009年 | 5篇 |
2008年 | 15篇 |
2007年 | 13篇 |
2006年 | 19篇 |
2005年 | 12篇 |
2004年 | 6篇 |
2003年 | 12篇 |
2002年 | 12篇 |
2001年 | 13篇 |
2000年 | 11篇 |
1999年 | 13篇 |
1998年 | 8篇 |
1997年 | 5篇 |
1996年 | 10篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1992年 | 7篇 |
1991年 | 4篇 |
1990年 | 3篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 5篇 |
1986年 | 4篇 |
1985年 | 3篇 |
1984年 | 5篇 |
1983年 | 2篇 |
1982年 | 4篇 |
1981年 | 8篇 |
1980年 | 5篇 |
1979年 | 5篇 |
1978年 | 6篇 |
1977年 | 2篇 |
1975年 | 5篇 |
1973年 | 2篇 |
1970年 | 2篇 |
1969年 | 2篇 |
1968年 | 3篇 |
1967年 | 2篇 |
1965年 | 2篇 |
排序方式: 共有505条查询结果,搜索用时 15 毫秒
111.
112.
113.
This note generalizes various previous results on the equality of OLS and GLS in the General Linear Regression Model. 相似文献
114.
115.
116.
117.
118.
Apart from having intrinsic mathematical interest, order statistics are also useful in the solution of many applied sampling and analysis problems. For a general review of the properties and uses of order statistics, see David (1981). This paper provides tabulations of means and variances of certain order statistics from the gamma distribution, for parameter values not previously available. The work was motivated by a particular quota sampling problem, for which existing tables are not adequate. The solution to this sampling problem actually requires the moments of the highest order statistic within a given set; however the calculation algorithm used involves a recurrence relation, which causes all the lower order statistics to be calculated first. Therefore we took the opportunity to develop more extensive tables for the gamma order statistic moments in general. Our tables provide values for the order statistic moments which were not available in previous tables, notably those for higher values of m, the gamma distribution shape parameter. However we have also retained the corresponding statistics for lower values of m, first to allow for checking accuracy of the computtions agtainst previous tables, and second to provide an integrated presentation of our new results with the previously known values in a consistent format 相似文献
119.
120.
Shur Walter 《统计学通讯:理论与方法》2013,42(7):377-885
The Polya-Eggenberger distribution Involves drawing a ball from an urn containing black and white balls and, after each drawing, returning the ball together with s balls of the same color, The model represents positive contagion since the added balls are the same color as the one drawn, See Johnson and Kotz, (1977), This paper derives and examines the probability distribution which results from the Polya-Eggenberger model with only one change namely, the s additional balls added after each drawing are of the opposite color, producing a negative contagion model. Formulas in closed form are presented for the probability distribution function, the mean and variance, all binomial moments and, where s is greater than or equal to the number of balls in the urn at start, the mode, A formula for the mode is conjectured where s is less than the number of balls in the urn at start. Finally, the probability of obtaining k black balls in n drawings is shown in certain instances to be equal to Ank/n! where Ank are the Eulerian numbers. 相似文献