全文获取类型
收费全文 | 3257篇 |
免费 | 119篇 |
国内免费 | 41篇 |
专业分类
管理学 | 141篇 |
劳动科学 | 4篇 |
民族学 | 62篇 |
人才学 | 1篇 |
人口学 | 60篇 |
丛书文集 | 590篇 |
理论方法论 | 141篇 |
综合类 | 2159篇 |
社会学 | 108篇 |
统计学 | 151篇 |
出版年
2024年 | 3篇 |
2023年 | 13篇 |
2022年 | 28篇 |
2021年 | 69篇 |
2020年 | 38篇 |
2019年 | 38篇 |
2018年 | 32篇 |
2017年 | 42篇 |
2016年 | 55篇 |
2015年 | 79篇 |
2014年 | 133篇 |
2013年 | 144篇 |
2012年 | 139篇 |
2011年 | 181篇 |
2010年 | 209篇 |
2009年 | 220篇 |
2008年 | 191篇 |
2007年 | 179篇 |
2006年 | 196篇 |
2005年 | 177篇 |
2004年 | 135篇 |
2003年 | 223篇 |
2002年 | 314篇 |
2001年 | 253篇 |
2000年 | 169篇 |
1999年 | 38篇 |
1998年 | 17篇 |
1997年 | 12篇 |
1996年 | 18篇 |
1995年 | 17篇 |
1994年 | 16篇 |
1993年 | 6篇 |
1992年 | 8篇 |
1991年 | 9篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 4篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1984年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有3417条查询结果,搜索用时 0 毫秒
21.
Yaling Yin Christine E. Soteros Miķelis G. Bickis 《Journal of statistical planning and inference》2009
Traditional multiple hypothesis testing procedures fix an error rate and determine the corresponding rejection region. In 2002 Storey proposed a fixed rejection region procedure and showed numerically that it can gain more power than the fixed error rate procedure of Benjamini and Hochberg while controlling the same false discovery rate (FDR). In this paper it is proved that when the number of alternatives is small compared to the total number of hypotheses, Storey's method can be less powerful than that of Benjamini and Hochberg. Moreover, the two procedures are compared by setting them to produce the same FDR. The difference in power between Storey's procedure and that of Benjamini and Hochberg is near zero when the distance between the null and alternative distributions is large, but Benjamini and Hochberg's procedure becomes more powerful as the distance decreases. It is shown that modifying the Benjamini and Hochberg procedure to incorporate an estimate of the proportion of true null hypotheses as proposed by Black gives a procedure with superior power. 相似文献
22.
To enhance modeling flexibility, the authors propose a nonparametric hazard regression model, for which the ordinary and weighted least squares estimation and inference procedures are studied. The proposed model does not assume any parametric specifications on the covariate effects, which is suitable for exploring the nonlinear interactions between covariates, time and some exposure variable. The authors propose the local ordinary and weighted least squares estimators for the varying‐coefficient functions and establish the corresponding asymptotic normality properties. Simulation studies are conducted to empirically examine the finite‐sample performance of the new methods, and a real data example from a recent breast cancer study is used as an illustration. The Canadian Journal of Statistics 37: 659–674; 2009 © 2009 Statistical Society of Canada 相似文献
23.
Sondra S. Teske Mark H. Weir Timothy A. Bartrand Yin Huang Sushil B. Tamrakar Charles N. Haas 《Risk analysis》2014,34(5):911-928
The effect of bioaerosol size was incorporated into predictive dose‐response models for the effects of inhaled aerosols of Francisella tularensis (the causative agent of tularemia) on rhesus monkeys and guinea pigs with bioaerosol diameters ranging between 1.0 and 24 μm. Aerosol‐size‐dependent models were formulated as modification of the exponential and β‐Poisson dose‐response models and model parameters were estimated using maximum likelihood methods and multiple data sets of quantal dose‐response data for which aerosol sizes of inhaled doses were known. Analysis of F. tularensis dose‐response data was best fit by an exponential dose‐response model with a power function including the particle diameter size substituting for the rate parameter k scaling the applied dose. There were differences in the pathogen's aerosol‐size‐dependence equation and models that better represent the observed dose‐response results than the estimate derived from applying the model developed by the International Commission on Radiological Protection (ICRP, 1994) that relies on differential regional lung deposition for human particle exposure. 相似文献
24.
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
25.
布署 《内蒙古民族大学学报(社会科学版)》2009,35(3):9-11
古巴自革命胜利之日起,即受到了美国的封锁打压.但与美国咫尺之隔的古巴,却一直不甘妥协,从而使古巴的社会主义制度得以生存,并取得了一定的进展. 相似文献
26.
27.
28.
29.
随着城市社会经济的快速发展,公路主枢纽规划所面临的形势发生了重要变化,规划的理念也需要更新,因此许多主枢纽城市已经完成或正在进行公路主枢纽规划修编工作. 相似文献
30.
刘澍 《安徽大学学报(哲学社会科学版)》2006,30(2):84-89
行政诉讼调解长期以来一直是一个莫衷一是的热点问题。在行政诉讼法即将修改之际,探讨这一问题具有重要的现实意义。文章总结了现行行政诉讼不适用调解原则的成因、困境,指出我国现行行政诉讼不适用调解原则陷入困境的理论误导的结果,并结合域外相关制度的经验,得出行政诉讼调解不仅是一种国际经验,而且应当奠定在服务行政理论基础之上才能得到正确的说明。 相似文献