全文获取类型
收费全文 | 1949篇 |
免费 | 90篇 |
专业分类
管理学 | 431篇 |
民族学 | 16篇 |
人口学 | 187篇 |
丛书文集 | 6篇 |
理论方法论 | 129篇 |
综合类 | 52篇 |
社会学 | 837篇 |
统计学 | 381篇 |
出版年
2023年 | 27篇 |
2022年 | 18篇 |
2021年 | 17篇 |
2020年 | 30篇 |
2019年 | 67篇 |
2018年 | 111篇 |
2017年 | 122篇 |
2016年 | 110篇 |
2015年 | 73篇 |
2014年 | 85篇 |
2013年 | 331篇 |
2012年 | 97篇 |
2011年 | 63篇 |
2010年 | 81篇 |
2009年 | 78篇 |
2008年 | 59篇 |
2007年 | 69篇 |
2006年 | 86篇 |
2005年 | 48篇 |
2004年 | 44篇 |
2003年 | 36篇 |
2002年 | 49篇 |
2001年 | 58篇 |
2000年 | 37篇 |
1999年 | 27篇 |
1998年 | 17篇 |
1997年 | 16篇 |
1996年 | 10篇 |
1995年 | 7篇 |
1994年 | 11篇 |
1993年 | 10篇 |
1992年 | 13篇 |
1991年 | 11篇 |
1990年 | 10篇 |
1989年 | 6篇 |
1988年 | 15篇 |
1987年 | 5篇 |
1986年 | 6篇 |
1985年 | 11篇 |
1984年 | 6篇 |
1983年 | 6篇 |
1982年 | 7篇 |
1980年 | 8篇 |
1979年 | 7篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1974年 | 5篇 |
1972年 | 3篇 |
1971年 | 3篇 |
1968年 | 4篇 |
排序方式: 共有2039条查询结果,搜索用时 781 毫秒
311.
Choongrak Kim Woochul Kim Byeong U. Park Changkon Hong Meeseon Jeong 《统计学通讯:理论与方法》2013,42(7):1577-1597
Although the Bezier curve is very popular in the area of computational graphics it has rarely been used by statisticians. In this paper we develop methods and techniques for use of the Bezier curve in estimation of density and regression function. Also, asymptotic mean integrated square error for both estimators are derived. Comparisons with kernel estimator are conducted using simulation. 相似文献
312.
McDonald's ωt,Cronbach's α, and Generalized θ for Composite Reliability of Common Factors Structures
In the common factor model for subtest scores, several reliability coefficients, including Cronbach's α, have been found to be biased. In this article, we introduce a new coefficient, θG, or Generalized θ, which is a generalized version of Armor's θ coefficient and is equal to the true reliability when the dimensions are orthogonal and the measures are parallel. We assessed the McDonald's ωt, α, and θG in terms of mean bias, efficiency, and precision using a Monte Carlo simulation. θG outperformed ωt when the factors were orthogonal or nearly orthogonal with low correlations between them. 相似文献
313.
A generalization of the Poisson distribution was defined by Consul and Jain (Ann. Math. Statist., 41, (1970)) and was obtained as a particular family of Lagrange distributions by Consul and Shenton (SIAM. J. Appl. Math., 23, (1972)). The distribution is subsequently named the generalized Poisson distribution (GPD). This GPD reduces to the Poisson distribution for ? = 0. When the data have a one-way layout structure, the asymptotically locally optimal Neyman's C(d) test is constructed and compared with the conditional test on the hypothesis Ho? = 0. Within the framework of the generalized linear models an appropriate link function is given, and the asymptotic distributions of the estimated parameters are derived. 相似文献
314.
In the model of progressive type II censoring, point and interval estimation as well as relations for single and product moments are considered. Based on two-parameter exponential distributions, maximum likelihood estimators (MLEs), uniformly minimum variance unbiased estimators (UMVUEs) and best linear unbiased estimators (BLUEs) are derived for both location and scale parameters. Some properties of these estimators are shown. Moreover, results for single and product moments of progressive type II censored order statistics are presented to obtain recurrence relations from exponential and truncated exponential distributions. These relations may then be used to compute all the means, variances and covariances of progressive type II censored order statistics based on exponential distributions for arbitrary censoring schemes. The presented recurrence relations simplify those given by Aggarwala and Balakrishnan (1996) 相似文献
315.
The partial attributable risk (PAR) has been introduced as a tool for partitioning the responsibility for causing an adverse event between various risk factors. It has arisen from epidemiology, but it is also a valid general risk allocation concept, which can, for example, be applied to data from customer satisfaction surveys. So far, a variance formula for the PAR has been missing so that the confidence intervals were not directly available. This paper provides the asymptotic normal distribution for the PAR determined from a cross-sectional study. 相似文献
316.
It is known that the Kaplan–Meier estimation may be improved via presmoothing methods. In this article, we introduce an extended presmoothed Kaplan–Meier estimator in the presence of covariates. The main result is the strong consistency of general empirical integrals based on such an estimator. As applications, one can obtain a consis-tent multivariate empirical distribution under censoring, and also can obtain a consistent estimation of regression parameters. We illustrate the new estimation methods through simulations and real data analysis. 相似文献
317.
This article examines a semiparametric test for checking the constancy of serial dependence via copula models for Markov time series. A semiparametric score test is proposed for testing the constancy of the copula parameter against stochastically varying copula parameter. The asymptotic null distribution of the test is established. A semiparametric bootstrap procedure is employed for the estimation of the variance of the proposed score test. Illustrations are given based on simulated series and historic interest rate data. 相似文献
318.
The existence of waiting time moments for single server queues with mixed renewal and poisson inputs
Siegfried Schönherr 《Statistics》2013,47(2):225-232
The following queuing system is considered: Two independent recurrent input streams (streams 1 and 2) arrive at a server. It is assumed that stream 1 is of Poisson type. Three priority disciplines are studied in case that customers of type 1 have priority: head-of-the-line, preemptive-resume, and preemptive-repeat discipline. For all three cases, the limiting distribution function of actual waiting times of low-priority customers is considered, and conditions are given for the existence of moments related to these limiting distributions. 相似文献
319.
320.