全文获取类型
收费全文 | 7129篇 |
免费 | 135篇 |
国内免费 | 33篇 |
专业分类
管理学 | 315篇 |
民族学 | 26篇 |
人口学 | 142篇 |
丛书文集 | 229篇 |
理论方法论 | 108篇 |
综合类 | 1742篇 |
社会学 | 71篇 |
统计学 | 4664篇 |
出版年
2024年 | 5篇 |
2023年 | 25篇 |
2022年 | 57篇 |
2021年 | 58篇 |
2020年 | 108篇 |
2019年 | 203篇 |
2018年 | 230篇 |
2017年 | 456篇 |
2016年 | 147篇 |
2015年 | 169篇 |
2014年 | 246篇 |
2013年 | 2027篇 |
2012年 | 545篇 |
2011年 | 287篇 |
2010年 | 209篇 |
2009年 | 242篇 |
2008年 | 257篇 |
2007年 | 255篇 |
2006年 | 219篇 |
2005年 | 227篇 |
2004年 | 182篇 |
2003年 | 171篇 |
2002年 | 164篇 |
2001年 | 149篇 |
2000年 | 127篇 |
1999年 | 75篇 |
1998年 | 64篇 |
1997年 | 47篇 |
1996年 | 41篇 |
1995年 | 33篇 |
1994年 | 25篇 |
1993年 | 30篇 |
1992年 | 27篇 |
1991年 | 25篇 |
1990年 | 26篇 |
1989年 | 22篇 |
1988年 | 15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7297条查询结果,搜索用时 31 毫秒
901.
This article considers the estimation of the restricted ridge regression parameter in singular models. The problem is commenced with considering elliptically contoured equality constrained and then followed by proposing the preliminary test estimator. Along with proposing some important properties of this estimator, a real example satisfying the elliptical assumption is also given to bring the problem into a noticeable issue. 相似文献
902.
In this article, we introduce new asymptotic expansions for probability functions of sums of independent and identically distributed random variables. Results are obtained by efficiently employing information provided by lower-order convolutions. In comparison with Edgeworth-type theorems, advantages include improved asymptotic results in the case of symmetric random variables and ease of computation of main error terms and asymptotic crossing points. The first-order estimate can perform quite well against the corresponding renormalized saddlepoint approximation and, pointwise, requires evaluation of only a single convolution integral. While the new expansions are fairly straightforward, the implications are fortuitous and may spur further related work. 相似文献
903.
Hsiaw-Chan Yeh 《统计学通讯:理论与方法》2013,42(4):692-715
Two multivariate stationary processes with general multivariate Weibull marginals are developed and studied. The joint distribution of the two adjacent events in the processes and the distributions of the finite sample minima as well as the geometric minima are derived. The characterization properties of these two processes are also proved. 相似文献
904.
Consider the problem of testing the isotonic of several p-variate normal mean vectors against all alternatives. It is difficult to compute the exact p-value for this problem of testing with the classical method when the covariance matrices are completely unknown. In the present paper, a test statistic is proposed for this problem of testing. A reformulation of the test statistic is given based on the orthogonal projections on the closed convex cones and then the upper bound for p-value of the test statistic is computed. 相似文献
905.
In this article, we first present a characterization of the normal distribution and then we introduce an exact goodness of fit test for normal distribution. The power of the proposed test under various alternatives is compared with the existing tests, by simulation. 相似文献
906.
In this paper, we estimate multicomponent stress-strength reliability by assuming Burr-XII distribution. The research methodology adopted here is to estimate the parameter using maximum likelihood estimation. Reliability is estimated using the maximum likelihood method of estimation and results are compared using the Monte Carlo simulation for small samples. Using real data sets we illustrate the procedure clearly. 相似文献
907.
Francesco Porro 《统计学通讯:理论与方法》2013,42(18):3967-3977
The aim of this article is to establish an ordering related to the inequality for the recently introduced Zenga distribution. In addition to the well-known order based on the Lorenz curve, the order based on I(p) curve is considered. Since the Zenga distribution seems to be suitable to model wealth, financial, actuarial, and, especially, income distributions, these findings are fundamental in the understanding of how parameter values are related to inequality. This investigation shows that for the Zenga distribution, two of the three parameters are inequality indicators. 相似文献
908.
Yogendra P. Chaubey 《统计学通讯:理论与方法》2013,42(21):4491-4506
Here, we consider wavelet based estimation of the derivatives of a probability density function under random sampling from a weighted distribution and extend the results regarding the asymptotic convergence rates under the i.i.d. setup studied in Prakasa Rao (1996) to the biased-data setup. We compare the performance of the wavelet based estimator with that of the kernel based estimator obtained by differentiating the Efromovich (2004) kernel density estimator through a simulation study. 相似文献
909.
910.
Given a most believed value for a quantity together with upper and lower possible deviations from that value, a rectangular distribution might be used to represent state-of-knowledge about the quantity. If the deviations are themselves known by probability distributions, and the value conditioned on the deviations is rectangular, then the marginal distribution of the value is determined by the distributions of the deviations. Here we show under quite general conditions that conversely, given the marginal distribution, the distributions of the deviations are uniquely determined. The case in which the marginal distribution is trapezoidal is studied in some detail. 相似文献