全文获取类型
收费全文 | 10781篇 |
免费 | 175篇 |
国内免费 | 31篇 |
专业分类
管理学 | 612篇 |
民族学 | 367篇 |
人才学 | 3篇 |
人口学 | 187篇 |
丛书文集 | 1110篇 |
理论方法论 | 371篇 |
综合类 | 5465篇 |
社会学 | 739篇 |
统计学 | 2133篇 |
出版年
2023年 | 12篇 |
2022年 | 10篇 |
2021年 | 19篇 |
2020年 | 28篇 |
2019年 | 176篇 |
2018年 | 330篇 |
2017年 | 652篇 |
2016年 | 125篇 |
2015年 | 91篇 |
2014年 | 293篇 |
2013年 | 832篇 |
2012年 | 375篇 |
2011年 | 285篇 |
2010年 | 288篇 |
2009年 | 326篇 |
2008年 | 379篇 |
2007年 | 493篇 |
2006年 | 519篇 |
2005年 | 620篇 |
2004年 | 631篇 |
2003年 | 709篇 |
2002年 | 585篇 |
2001年 | 679篇 |
2000年 | 433篇 |
1999年 | 289篇 |
1998年 | 131篇 |
1997年 | 110篇 |
1996年 | 130篇 |
1995年 | 122篇 |
1994年 | 115篇 |
1993年 | 76篇 |
1992年 | 78篇 |
1991年 | 93篇 |
1990年 | 47篇 |
1989年 | 30篇 |
1988年 | 92篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 116篇 |
1984年 | 147篇 |
1983年 | 84篇 |
1982年 | 76篇 |
1981年 | 122篇 |
1980年 | 69篇 |
1979年 | 63篇 |
1978年 | 57篇 |
1977年 | 11篇 |
1976年 | 17篇 |
1975年 | 10篇 |
1973年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
231.
In this paper, we investigate the complete moment convergence and Lr convergence for maximal partial sums of asymptotically almost negatively associated random variables under some general conditions. The results obtained in the paper generalize some corresponding ones for negatively associated random variables. 相似文献
232.
David R. Bickel 《统计学通讯:理论与方法》2017,46(21):10788-10799
Empirical Bayes estimates of the local false discovery rate can reflect uncertainty about the estimated prior by supplementing their Bayesian posterior probabilities with confidence levels as posterior probabilities. This use of coherent fiducial inference with hierarchical models generates set estimators that propagate uncertainty to varying degrees. Some of the set estimates approach estimates from plug-in empirical Bayes methods for high numbers of comparisons and can come close to the usual confidence sets given a sufficiently low number of comparisons. 相似文献
233.
Diagnostics measures for detecting outliers in data from block designs of experiments with correlated errors are considered. Influence is often assessed by deleting suspected outlying observations. Autocorrelation of order one is considered to model correlation in each block. Cook-statistic is developed for detecting the effect of a single outlier, where results are illustrated with an example. 相似文献
234.
Land subsidence risk assessment (LSRA) is a multi‐attribute decision analysis (MADA) problem and is often characterized by both quantitative and qualitative attributes with various types of uncertainty. Therefore, the problem needs to be modeled and analyzed using methods that can handle uncertainty. In this article, we propose an integrated assessment model based on the evidential reasoning (ER) algorithm and fuzzy set theory. The assessment model is structured as a hierarchical framework that regards land subsidence risk as a composite of two key factors: hazard and vulnerability. These factors can be described by a set of basic indicators defined by assessment grades with attributes for transforming both numerical data and subjective judgments into a belief structure. The factor‐level attributes of hazard and vulnerability are combined using the ER algorithm, which is based on the information from a belief structure calculated by the Dempster‐Shafer (D‐S) theory, and a distributed fuzzy belief structure calculated by fuzzy set theory. The results from the combined algorithms yield distributed assessment grade matrices. The application of the model to the Xixi‐Chengnan area, China, illustrates its usefulness and validity for LSRA. The model utilizes a combination of all types of evidence, including all assessment information—quantitative or qualitative, complete or incomplete, and precise or imprecise—to provide assessment grades that define risk assessment on the basis of hazard and vulnerability. The results will enable risk managers to apply different risk prevention measures and mitigation planning based on the calculated risk states. 相似文献
235.
236.
237.
近代天津是一个瘟疫多发的城市,尤其是在水旱灾害频发的年份。瘟疫流行期间,天津市各慈善团体均致力于疫病的防治、控制和治疗。他们的善举有效地控制了疫情,拯救了许多人的生命,尤其是士绅倡导的"防疫"理念为近代公共卫生体制的确立提供了市民基础。 相似文献
238.
《商业与经济统计学杂志》2012,30(1):124-136
Time-varying parameter models with stochastic volatility are widely used to study macroeconomic and financial data. These models are almost exclusively estimated using Bayesian methods. A common practice is to focus on prior distributions that themselves depend on relatively few hyperparameters such as the scaling factor for the prior covariance matrix of the residuals governing time variation in the parameters. The choice of these hyperparameters is crucial because their influence is sizeable for standard sample sizes. In this article, we treat the hyperparameters as part of a hierarchical model and propose a fast, tractable, easy-to-implement, and fully Bayesian approach to estimate those hyperparameters jointly with all other parameters in the model. We show via Monte Carlo simulations that, in this class of models, our approach can drastically improve on using fixed hyperparameters previously proposed in the literature. Supplementary materials for this article are available online. 相似文献
239.
Tao Wang 《统计学通讯:理论与方法》2017,46(14):6947-6958
An outlier is defined as an observation that is significantly different from the others in its dataset. In high-dimensional regression analysis, datasets often contain a portion of outliers. It is important to identify and eliminate the outliers for fitting a model to a dataset. In this paper, a novel outlier detection method is proposed for high-dimensional regression problems. The leave-one-out idea is utilized to construct a novel outlier detection measure based on distance correlation, and then an outlier detection procedure is proposed. The proposed method enjoys several advantages. First, the outlier detection measure can be simply calculated, and the detection procedure works efficiently even for high-dimensional regression data. Moreover, it can deal with a general regression, which does not require specification of a linear regression model. Finally, simulation studies show that the proposed method behaves well for detecting outliers in high-dimensional regression model and performs better than some other competing methods. 相似文献
240.
Bayesian acceptance sampling plans, which utilize prior information on the process variation, can be employed as an alternative to conventional types of plans for taking decisions on the disposition of submitted lots. A special type of double sampling inspection plans by attributes with small acceptance numbers using Bayesian methodology is presented in this paper emphasizing its significance over small acceptance number single sampling plans. The procedures for designing such sampling plans for specified degree of discrimination which would ensure protection to the producer and consumer are discussed with illustrations under the conditions for the application of gamma-Poisson distribution. 相似文献