全文获取类型
收费全文 | 7292篇 |
免费 | 144篇 |
国内免费 | 33篇 |
专业分类
管理学 | 339篇 |
民族学 | 26篇 |
人口学 | 143篇 |
丛书文集 | 242篇 |
理论方法论 | 110篇 |
综合类 | 1895篇 |
社会学 | 73篇 |
统计学 | 4641篇 |
出版年
2024年 | 5篇 |
2023年 | 25篇 |
2022年 | 35篇 |
2021年 | 58篇 |
2020年 | 109篇 |
2019年 | 207篇 |
2018年 | 231篇 |
2017年 | 459篇 |
2016年 | 157篇 |
2015年 | 176篇 |
2014年 | 254篇 |
2013年 | 2037篇 |
2012年 | 560篇 |
2011年 | 296篇 |
2010年 | 213篇 |
2009年 | 256篇 |
2008年 | 267篇 |
2007年 | 270篇 |
2006年 | 233篇 |
2005年 | 233篇 |
2004年 | 186篇 |
2003年 | 176篇 |
2002年 | 169篇 |
2001年 | 157篇 |
2000年 | 133篇 |
1999年 | 81篇 |
1998年 | 70篇 |
1997年 | 50篇 |
1996年 | 43篇 |
1995年 | 36篇 |
1994年 | 30篇 |
1993年 | 33篇 |
1992年 | 27篇 |
1991年 | 25篇 |
1990年 | 28篇 |
1989年 | 25篇 |
1988年 | 17篇 |
1987年 | 16篇 |
1986年 | 8篇 |
1985年 | 11篇 |
1984年 | 13篇 |
1983年 | 15篇 |
1982年 | 7篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 6篇 |
1976年 | 3篇 |
1975年 | 4篇 |
排序方式: 共有7469条查询结果,搜索用时 343 毫秒
991.
Jan W.H. Swanepoel 《统计学通讯:理论与方法》2013,42(11):3785-3799
Let X1,X2,… Xn be a sample of independent identically distributed (i.i.d)random variables having an unknown absolutely continuous distribution function f with density f the twofold aim of his paper consists in, firstly deriving asymptotic expressions of the mean intergrated squared error (MISE) of a kernel estimator of F when f is either assumed to be continuous everywhere or problem of finding optimal kernels in these two cases is studied in detail. 相似文献
992.
A more generalized stirling distribution of the second kind (MGSDSK) is introduced in this paper as the distribution of the sum of the independent but not identically distributed left truncated Poisson variables. Properties of MGSDSK are studied. The recursion relation and decomposition of MGSDSK are obtained. The rth moment is also found and a new recurrence relationship for them are given. A new incomplete exponential function is utilized in the derivations. A MVU estimate of the p, d, f. of MGSDSK is obtained. 相似文献
993.
994.
995.
996.
Jayaram Sethuraman 《统计学通讯:理论与方法》2013,42(11):4291-4298
997.
998.
P.C. Consul 《统计学通讯:理论与方法》2013,42(10):3699-3706
The first stochastic model is based upon two urns A and B, where A contains a fixed number of white and black balls and B is empty. The player selects an integer β ≥, 2 and draws the balls one by one (with replacement) from urn A and balls of the same colour are put in urn B. The process is continued as long as the number of white balls in B exceeds (β-1) times the number of black balls in B. The player stops after drawing β(x-1) balls and is declared to be a winner if urn B has (x-1) black balls. It is shown that x has the Geeta distribution. Assuming that the mean μ is a function of two parameters θ and β it has been shown that for small changes inthe value of θ there exists a difference-differential equation which leads to the Geeta distribution. 相似文献
999.
The failure rate r(t) is assumed to have the shape of the"first"part of the"bathtub"model, i.e.r(t) is non-increasing for t<r and is constant for t> r. Asymptotic distribution of one of the estimates proposed earlier has been investigated in this paper. This leads to a test for the hypothesis HQ r<r 0 vs H :r>r (where TQ > 0). Asymptotic expression for the power of this test under Pitman alternatives is derived. Some simulations are reported. 相似文献
1000.
Let γ(t) be the residual life at time t of the renewal process {A(t), t > 0}, which has F as the common distribution function of the inter-arrival times. In this article we prove that if Var(γ(t)) is constant, then F will be exponentially or geometrically distributed under the assumption F is continuous or discrete respectively. An application and a related example also are given. 相似文献