全文获取类型
收费全文 | 1390篇 |
免费 | 22篇 |
国内免费 | 1篇 |
专业分类
管理学 | 91篇 |
民族学 | 2篇 |
人口学 | 12篇 |
丛书文集 | 41篇 |
理论方法论 | 9篇 |
综合类 | 526篇 |
社会学 | 21篇 |
统计学 | 711篇 |
出版年
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 9篇 |
2020年 | 16篇 |
2019年 | 29篇 |
2018年 | 33篇 |
2017年 | 68篇 |
2016年 | 25篇 |
2015年 | 28篇 |
2014年 | 43篇 |
2013年 | 331篇 |
2012年 | 76篇 |
2011年 | 41篇 |
2010年 | 32篇 |
2009年 | 40篇 |
2008年 | 54篇 |
2007年 | 40篇 |
2006年 | 36篇 |
2005年 | 47篇 |
2004年 | 35篇 |
2003年 | 28篇 |
2002年 | 19篇 |
2001年 | 25篇 |
2000年 | 37篇 |
1999年 | 43篇 |
1998年 | 29篇 |
1997年 | 29篇 |
1996年 | 41篇 |
1995年 | 34篇 |
1994年 | 28篇 |
1993年 | 11篇 |
1992年 | 21篇 |
1991年 | 4篇 |
1990年 | 18篇 |
1989年 | 8篇 |
1988年 | 13篇 |
1987年 | 1篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1975年 | 3篇 |
排序方式: 共有1413条查询结果,搜索用时 25 毫秒
991.
K. Zografos 《统计学通讯:理论与方法》2013,42(7):1715-1728
A class of measures of dependence between two random vectors is defined, in terms of the canonical correlations obtained from Fisher's information matrix. Some basic properties are proved for this class of measures. Examples are given to illustrate that the class gives good measures, under normal models. Interesting measures are also arise for bivariate models where the correlation coefficient does not exist for some values of the parameters of the model. 相似文献
992.
Mei-Ling Ting Lee 《统计学通讯:理论与方法》2013,42(2):615-623
Markov chains are used to model binary urine test results. Taking advantage of the transition mechanism of Markov chains, missing observations can be incorporated in the analysis. Maximum likelihood estimates of transition probabilities are computed. Formulas for empirical Bayes procedures are given. 相似文献
993.
Jürgen Groβ 《统计学通讯:理论与方法》2013,42(8):1803-1812
Under the weakly singular Gauss-Markov model, the class of linearly admissible estimators for the expectation of the observable random vector with respect to the mean square error criterion is considered. It is demonstrated that this class admits linearly admissible estimators for an arbitrary estimable parametric function, which locally improve the best linear estimator with respect to the mean square error matrix criterion. 相似文献
994.
In a two-level factorial experiment, we consider orthogonal designs that allow joint estimation of the grand mean, all main effects, and certain classes of two-level interactions, assuming that the remaining effects are all negligible. Based on a judicious allocation of the factorial effects of interest to the columns of a Hadamard matrix, we propose some general classes of orthogonal and saturated designs which include some existing orthogonal main-effect plans of asymmetric factorials as special cases. 相似文献
995.
Experiments that study complex real world systems in business, engineering and sciences can be conducted at different levels of accuracy or sophistication. Nested space-filling designs are suitable for such multi-fidelity experiments. In this paper, we propose a systematic method to construct nested space-filling designs for experiments with two levels of accuracy. The method that makes use of nested difference matrices can be easily performed, many nested space-filling designs for experiments with two levels of accuracy can thus be constructed, and the resulting designs achieve stratification in low dimensions. In addition, the proposed method can also be used to obtain sliced space-filling designs for conducting computer experiments with both qualitative and quantitative factors. 相似文献
996.
In this paper, we present a new algorithm for clustering proximity-relation matrix that does not require the transitivity property. The proposed algorithm is first inspired by the idea of Yang and Wu [16] then turned into a self-organizing process that is built upon the intuition behind clustering. At the end of the process subjects belonging to be the same cluster should converge to the same point, which represents the cluster center. However, the performance of Yang and Wu's algorithm depends on parameter selection. In this paper, we use the partition entropy (PE) index to choose it. Numerical result illustrates that the proposed method does not only solve the parameter selection problem but also obtains an optimal clustering result. Finally, we apply the proposed algorithm to three applications. One is to evaluate the performance of higher education in Taiwan, another is machine–parts grouping in cellular manufacturing systems, and the other is to cluster probability density functions. 相似文献
997.
Lusi Firinguetti 《统计学通讯:理论与方法》2013,42(3):731-745
Assuming the disturbances are normally distributed, we derive expressions for, and simple conditions for the existence of the exact bias and matrix of second order moments of the Lawless and Wang Operational Ridge Regression estimator. 相似文献
998.
蔡晓宇 《合肥工业大学学报(社会科学版)》2010,24(5):50-54
利用景观生态学的斑块-廊道-基质理论、景观异质性理论及生物多样性理论对合肥市绿地系统规划进行应用分析,指出合肥市绿地系统的优点与不足,并就此提出了改进措施,以期为进一步从生态学角度指导合肥市绿地系统规划提供参考。 相似文献
999.
In many areas of application, especially life testing and reliability, it is often of interest to estimate an unknown cumulative distribution (cdf). A simultaneous confidence band (SCB) of the cdf can be used to assess the statistical uncertainty of the estimated cdf over the entire range of the distribution. Cheng and Iles [1983. Confidence bands for cumulative distribution functions of continuous random variables. Technometrics 25 (1), 77–86] presented an approach to construct an SCB for the cdf of a continuous random variable. For the log-location-scale family of distributions, they gave explicit forms for the upper and lower boundaries of the SCB based on expected information. In this article, we extend the work of Cheng and Iles [1983. Confidence bands for cumulative distribution functions of continuous random variables. Technometrics 25 (1), 77–86] in several directions. We study the SCBs based on local information, expected information, and estimated expected information for both the “cdf method” and the “quantile method.” We also study the effects of exceptional cases where a simple SCB does not exist. We describe calibration of the bands to provide exact coverage for complete data and type II censoring and better approximate coverage for other kinds of censoring. We also discuss how to extend these procedures to regression analysis. 相似文献
1000.
This paper deals with the estimation of reliability R = P(Y < X) when X is a random strength of a component subjected to a random stress Y, and (X, Y) follows a bivariate Rayleigh distribution. The maximum likelihood estimator of R and its asymptotic distribution are obtained. An asymptotic confidence interval of R is constructed using the asymptotic distribution. Also, two confidence intervals are proposed based on Bootstrap method and a computational approach. Testing of the reliability based on asymptotic distribution of R is discussed. Simulation study to investigate performance of the confidence intervals and tests has been carried out. Also, a numerical example is given to illustrate the proposed approaches. 相似文献