全文获取类型
收费全文 | 22944篇 |
免费 | 651篇 |
国内免费 | 299篇 |
专业分类
管理学 | 1080篇 |
劳动科学 | 2篇 |
民族学 | 301篇 |
人才学 | 1篇 |
人口学 | 246篇 |
丛书文集 | 2919篇 |
理论方法论 | 1173篇 |
综合类 | 15588篇 |
社会学 | 1888篇 |
统计学 | 696篇 |
出版年
2024年 | 50篇 |
2023年 | 193篇 |
2022年 | 196篇 |
2021年 | 260篇 |
2020年 | 322篇 |
2019年 | 388篇 |
2018年 | 379篇 |
2017年 | 413篇 |
2016年 | 430篇 |
2015年 | 533篇 |
2014年 | 1112篇 |
2013年 | 1475篇 |
2012年 | 1414篇 |
2011年 | 1626篇 |
2010年 | 1285篇 |
2009年 | 1358篇 |
2008年 | 1465篇 |
2007年 | 1720篇 |
2006年 | 1593篇 |
2005年 | 1538篇 |
2004年 | 1445篇 |
2003年 | 1334篇 |
2002年 | 1181篇 |
2001年 | 900篇 |
2000年 | 526篇 |
1999年 | 205篇 |
1998年 | 103篇 |
1997年 | 79篇 |
1996年 | 77篇 |
1995年 | 47篇 |
1994年 | 41篇 |
1993年 | 37篇 |
1992年 | 30篇 |
1991年 | 30篇 |
1990年 | 20篇 |
1989年 | 28篇 |
1988年 | 13篇 |
1987年 | 11篇 |
1986年 | 4篇 |
1985年 | 8篇 |
1984年 | 3篇 |
1983年 | 7篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1975年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
91.
Arnold Zellner 《The American statistician》2013,67(4):278-280
In this article statistical inference is viewed as information processing involving input information and output information. After introducing information measures for the input and output information, an information criterion functional is formulated and optimized to obtain an optimal information processing rule (IPR). For the particular information measures and criterion functional adopted, it is shown that Bayes's theorem is the optimal IPR. This optimal IPR is shown to be 100% efficient in the sense that its use leads to the output information being exactly equal to the given input information. Also, the analysis links Bayes's theorem to maximum-entropy considerations. 相似文献
92.
One of the major aims of one-dimensional extreme-value theory is to estimate quantiles outside the sample or at the boundary of the sample. The underlying idea of any method to do this is to estimate a quantile well inside the sample but near the boundary and then to shift it somehow to the right place. The choice of this “anchor quantile” plays a major role in the accuracy of the method. We present a bootstrap method to achieve the optimal choice of sample fraction in the estimation of either high quantile or endpoint estimation which extends earlier results by Hall and Weissman (1997) in the case of high quantile estimation. We give detailed results for the estimators used by Dekkers et al. (1989). An alternative way of attacking problems like this one is given in a paper by Drees and Kaufmann (1998). 相似文献
93.
Egmar Rödel 《Statistics》2013,47(4):573-585
Normed bivariate density funtions were introduced by HOEFFDING (1940/41). In the present paper estimators for normed bivariate ranks and on a FOURIER series expansion in LEGENDRE polynomials. The estimation of normed bivarate density functions under positive dependence is also described 相似文献
94.
Evaluation of a method for setting confidence intervals on the common mean of two normal populations
Let X1, , X2, …, X be distributed N(µ, σ2 x), let Y1, Y2, …, Y"n be distributed N(µ, σ2 y), and let X , X , … Xm, Y1, Y2, …, Yn be mutually independent. In this paper a method for setting confidence intervals on the common mean µ is proposed and evaluated. 相似文献
95.
Ronald D. Armstrong 《统计学通讯:模拟与计算》2013,42(7):1057-1073
This article develops a new cumulative sum statistic to identify aberrant behavior in a sequentially administered multiple-choice standardized examination. The examination responses can be described as finite Poisson trials, and the statistic can be used for other applications which fit this framework. The standardized examination setting uses a maximum likelihood estimate of examinee ability and an item response theory model. Aberrant and non aberrant probabilities are computed by an odds ratio analogous to risk adjusted CUSUM schemes. The significance level of a hypothesis test, where the null hypothesis is non-aberrant examinee behavior, is computed with Markov chains. A smoothing process is used to spread probabilities across the Markov states. The practicality of the approach to detect aberrant examinee behavior is demonstrated with results from both simulated and empirical data. 相似文献
96.
The cost and time consumption of many industrial experimentations can be reduced using the class of supersaturated designs since this can be used for screening out the important factors from a large set of potentially active variables. A supersaturated design is a design for which there are fewer runs than effects to be estimated. Although there exists a wide study of construction methods for supersaturated designs, their analysis methods are yet in an early research stage. In this article, we propose a method for analyzing data using a correlation-based measure, named as symmetrical uncertainty. This method combines measures from the information theory field and is used as the main idea of variable selection algorithms developed in data mining. In this work, the symmetrical uncertainty is used from another viewpoint in order to determine more directly the important factors. The specific method enables us to use supersaturated designs for analyzing data of generalized linear models for a Bernoulli response. We evaluate our method by using some of the existing supersaturated designs, obtained according to methods proposed by Tang and Wu (1997) as well as by Koukouvinos et al. (2008). The comparison is performed by some simulating experiments and the Type I and Type II error rates are calculated. Additionally, Receiver Operating Characteristics (ROC) curves methodology is applied as an additional statistical tool for performance evaluation. 相似文献
97.
We demonstrate a multidimensional approach for combining several indicators of well-being, including the traditional money-income indicators. This methodology avoids the difficult and much criticized task of computing imputed incomes for such indicators as net worth and schooling. Inequality in the proposed composite measures is computed using relative inequality indexes that permit simple analysis of both the contribution of each welfare indicator (and its factor components) and within and between components of total inequality when the population is grouped by income levels, age, gender, or any other criteria. The analysis is performed on U.S. data using the Michigan Survey of Income Dynamics. 相似文献
98.
S. Kalke 《Journal of Statistical Computation and Simulation》2013,83(4):641-667
In this paper, we introduce the p-generalized polar methods for the simulation of the p-generalized Gaussian distribution. On the basis of geometric measure representations, the well-known Box–Muller method and the Marsaglia–Bray rejecting polar method for the simulation of the Gaussian distribution are generalized to simulate the p-generalized Gaussian distribution, which fits much more flexibly to data than the Gaussian distribution and has already been applied in various fields of modern sciences. To prove the correctness of the p-generalized polar methods, we give stochastic representations, and to demonstrate their adequacy, we perform a comparison of six simulation techniques w.r.t. the goodness of fit and the complexity. The competing methods include adapted general methods and another special method. Furthermore, we prove stochastic representations for all the adapted methods. 相似文献
99.
Sara Randall 《Serials Review》2013,39(3):181-182
With the ubiquity of federated search tools as viable solutions for students and researchers to search across external sources and internal repositories, users have become more sophisticated in their application of this technology. With the goal of optimizing the user experience of its newly introduced federated search offering, Endeavor Information Systems employed usability testing to gain insights into the critical requirements of librarians and information professionals for this solution. The results of this analysis, conducted in concert with market research and customer focus groups, and their relevance to Endeavor's federated search technology are the focus of this article. 相似文献
100.
Keith E. Muller 《The American statistician》2013,67(4):342-354
Canonical correlation has been little used and little understood, even by otherwise sophisticated analysts. An alternative approach to canonical correlation, based on a general linear multivariate model, is presented. Properties of principal component analysis are used to help explain the method. Standard computational methods for full rank canonical correlation, techniques for canonical correlation on component scores, and canonical correlation with less than full rank are discussed. They are seen to be essentially equivalent when the model equation for canonical correlation on component scores is presented. The two approaches to less than full rank situations are equivalent in some senses, but quite different in usefulness, depending on the application. An example dataset is analyzed in detail to help demonstrate the conclusions. 相似文献