全文获取类型
收费全文 | 10976篇 |
免费 | 317篇 |
国内免费 | 101篇 |
专业分类
管理学 | 280篇 |
劳动科学 | 2篇 |
民族学 | 50篇 |
人才学 | 2篇 |
人口学 | 199篇 |
丛书文集 | 800篇 |
理论方法论 | 490篇 |
综合类 | 5000篇 |
社会学 | 929篇 |
统计学 | 3642篇 |
出版年
2024年 | 14篇 |
2023年 | 82篇 |
2022年 | 86篇 |
2021年 | 126篇 |
2020年 | 220篇 |
2019年 | 271篇 |
2018年 | 298篇 |
2017年 | 402篇 |
2016年 | 288篇 |
2015年 | 362篇 |
2014年 | 957篇 |
2013年 | 2250篇 |
2012年 | 1287篇 |
2011年 | 795篇 |
2010年 | 770篇 |
2009年 | 637篇 |
2008年 | 585篇 |
2007年 | 277篇 |
2006年 | 203篇 |
2005年 | 228篇 |
2004年 | 218篇 |
2003年 | 215篇 |
2002年 | 169篇 |
2001年 | 131篇 |
2000年 | 111篇 |
1999年 | 69篇 |
1998年 | 46篇 |
1997年 | 51篇 |
1996年 | 28篇 |
1995年 | 34篇 |
1994年 | 21篇 |
1993年 | 18篇 |
1992年 | 12篇 |
1991年 | 11篇 |
1990年 | 15篇 |
1989年 | 13篇 |
1988年 | 12篇 |
1987年 | 6篇 |
1986年 | 7篇 |
1985年 | 10篇 |
1984年 | 14篇 |
1983年 | 9篇 |
1982年 | 7篇 |
1981年 | 9篇 |
1980年 | 6篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
ABSTRACTConditional tests are constructed by conditioning a fit measure to a minimal sufficient statistic. To calculate the p-value of these tests, Monte Carlo methods with co-sufficient samples can be used. In this paper we show how to simulate co-sufficient samples when the data distribution belongs to the exponential family with doubly transitive sufficient statistics. The proposed method is illustrated using the beta distribution. 相似文献
162.
Emad Ashtari Nezhad G. R. Mohtashami Borzadaran H. R. Nilli Sani Hadi Alizadeh Noughabi 《统计学通讯:模拟与计算》2013,42(10):2877-2897
AbstractIn time series, it is essential to check the independence of data by means of a proper method or an appropriate statistical test before any further analysis. Therefore, among different independence tests, a powerful and productive test has been introduced by Matilla-García and Marín via m-dimensional vectorial process, in which the value of the process at time t includes m-histories of the primary process. However, this method causes a dependency for the vectors even when the independence assumption of random variables is considered. Considering this dependency, a modified test is obtained in this article through presenting a new asymptotic distribution based on weighted chi-square random variables. Also, some other alterations to the test have been made via bootstrap method and by controlling the overlap. Compared with the primary test, it is obtained that not only the modified test is more accurate but also, it possesses higher power. 相似文献
163.
A rational fraction approximation is given for a function of one of the parameters defining Johnson's SUError assessment for a segment of the domain of validity shows remarkable accuracy. 相似文献
164.
A common statistical problem encountered in biomedical research is to test the hypothesis that the parameters of k binomial populations are all equal. An exact test of significance of this hypothesis is possible in principle, the appropriate null distribution being a normalized product of k binomial coefficients. However, the problem of computing the tail area of this distribution can be formidable since it requires the enumeration of all sets of k binomial coefficients whose product is less than a given constant. Existing algorithms, all of which rely on explicit enumeration to generate feasible binomial coefficients 相似文献
165.
A discrete distribution called the log-zero-Poisson distribution has been recommended by Katti (c.f. Biometrics 1970) as an alternate to the negative binomial and other distributions usually called "contagious" distributions.A major problem in the use of this and all other contagious distributions has been the difficulty of obtaining the maximum likelihood esti-mates. A custom-made ad hoc estimator, λ, has been proposed for the parameter λ of this distribution in Katti and Khedr (1980). In this paper, its efficiency relative to Fisher information is studied, only to discover that λ can be 30 times better than the maximum likelihood estimate in some parts of the parameter space and much weaker in other parts.A preliminary test is recommended to choose between the estimates, and the efficiency of the procedure is tabulated. As it is to be expected, the resultant estimator equals the better of the two estimators with some error at the values of the parameters where the two estimators are equivalent. 相似文献
166.
This paper presents a multivariate extension of Dunnett's test for comparing simultaneously k treatment group means with a single control group mean. A test based on Hotelling T2statistics is presented and approximate critical values are evaluated for the case of equal numbers of observations in each group, for the .05 and .01 levels of significance, for 1 to 5 variates, for 1 to 10 treatment groups, and for varying degrees of freedom. The accuracy of the procedure for generating approximate critical values is assessed via simulation studies conducted for selected cases and an example is presented using real data. 相似文献
167.
John F. Monahan 《统计学通讯:模拟与计算》2013,42(4):545-553
An algorithm, in the form of a Fortran subroutine TRIPLE, is given to compute statistics for the triples test for symmetry, The computational complexity of the algorithm is O(n2) which is an improvement over the straight for ward method, which is O(n3). 相似文献
168.
W. Y. Tan 《统计学通讯:模拟与计算》2013,42(1):35-60
In this paper we consider a simple linear regression model under heteroscedasticity and nonnormality. A statistical test for testing the regression coefficient is then derived by assuming normality for the random disturbances and by applying Welch's method. Some Monte Carlo studies are generated for assessing robustness of this test. By combining Tiku's robust procedure with the new test, a robust but more powerful test is developed. 相似文献
169.
M. L. Tiku 《统计学通讯:模拟与计算》2013,42(4):907-924
For testing that the population correlations coefficientp Q, Tiku and Balakrishnan1986) developed a robust test. This test is extended here to situcitions where one wants to test that p p , p being a specified non-zero value of p. o o 相似文献
170.
Michael Haber 《统计学通讯:模拟与计算》2013,42(4):999-1013
In 1935, R.A. Fisher published his well-known “exact” test for 2x2 contingency tables. This test is based on the conditional distribution of a cell entry when the rows and columns marginal totals are held fixed. Tocher (1950) and Lehmann (1959) showed that Fisher s test, when supplemented by randomization, is uniformly most powerful among all the unbiased tests UMPU). However, since all the practical tests for 2x2 tables are nonrandomized - and therefore biased the UMPU test is not necessarily more powerful than other tests of the same or lower size. Inthis work, the two-sided Fisher exact test and the UMPU test are compared with six nonrandomized unconditional exact tests with respect to their power. In both the two-binomial and double dichotomy models, the UMPU test is often less powerful than some of the unconditional tests of the same (or even lower) size. Thus, the assertion that the Tocher-Lehmann modification of Fisher's conditional test is the optimal test for 2x2 tables is unjustified. 相似文献