全文获取类型
收费全文 | 3919篇 |
免费 | 104篇 |
国内免费 | 56篇 |
专业分类
管理学 | 220篇 |
民族学 | 15篇 |
人才学 | 2篇 |
人口学 | 78篇 |
丛书文集 | 286篇 |
理论方法论 | 136篇 |
综合类 | 2311篇 |
社会学 | 179篇 |
统计学 | 852篇 |
出版年
2024年 | 1篇 |
2023年 | 17篇 |
2022年 | 15篇 |
2021年 | 31篇 |
2020年 | 45篇 |
2019年 | 55篇 |
2018年 | 63篇 |
2017年 | 108篇 |
2016年 | 66篇 |
2015年 | 72篇 |
2014年 | 340篇 |
2013年 | 554篇 |
2012年 | 209篇 |
2011年 | 294篇 |
2010年 | 362篇 |
2009年 | 314篇 |
2008年 | 272篇 |
2007年 | 180篇 |
2006年 | 170篇 |
2005年 | 137篇 |
2004年 | 135篇 |
2003年 | 112篇 |
2002年 | 116篇 |
2001年 | 86篇 |
2000年 | 75篇 |
1999年 | 53篇 |
1998年 | 26篇 |
1997年 | 24篇 |
1996年 | 18篇 |
1995年 | 15篇 |
1994年 | 24篇 |
1993年 | 14篇 |
1992年 | 11篇 |
1991年 | 10篇 |
1990年 | 4篇 |
1989年 | 2篇 |
1988年 | 7篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 4篇 |
1982年 | 7篇 |
1981年 | 5篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 2篇 |
排序方式: 共有4079条查询结果,搜索用时 171 毫秒
181.
Gart (1972) ottered a Statistic on testing the hypothesis of no second-order interaction in a 2×s×t contingency table. The statistic was tn be used as an asymptotic chi-square with (s-1) (t-1) degrees of freedom. We show that this statistic suiters from the drawback that unless certain side conditions hold, the statistic would reject the null hypothesis with probability approaching one asymptotically even in the null case. Hence the statistic is not strictly valid for the hypothesis for which it was intended. 相似文献
182.
David Sanjek 《Cultural Studies》2013,27(2-3):262-281
The 1994 US Supreme Court decision in Luther Campbell et al. v. Acuff-Rose Music, Inc., written by Justice David Souter, reversed a lower court decision and argued in favor of the rap group 2 Live Crew's playful critique of Roy Orbison's ‘Oh Pretty Woman’ by its function as parody. This essay seeks to contextualize that decision by showing the roots of 2 Live Crew's recording in the practice of ‘covering’ – the re-recording of an existent popular composition – and thus the possibilities for redefining authorship that arose with the advent of digital technology. The compositional techniques allowed by computer programs led to the proliferation of sampling in the hip-hop community, thereby liberating sounds from the original content and reconfiguring them in new songs. The technique allowed a critical, and in some cases adversarial, stance to be taken towards long-standing Western definitions of authorship and ownership. 2 Live Crew added to this rich stew of possibilities the familiar and time-tested genre of parody. Their piece took what one judge referred to as the ‘white bread original’ of the Roy Orbison record and twisted about the implicit point of view with regard to gender and sexuality. Discussion of the legal complications that followed upon the suing of the group by the holder of the copyright in the Orbison song, Acuff-Rose Music, Inc., includes the apparently sanctioned use of the song in the Disney-produced film Pretty Woman as well as the use of other Orbison material in director David Lynch's Blue Velvet. The essay concludes with suggestions as to how the language of Justice Souter's decision allows not only for future parodies but also a reinvigoration of speech, one which calls into question power relationships codified in US copyright statutes. 相似文献
183.
ANNAMARIA GUOLO 《Scandinavian Journal of Statistics》2011,38(2):237-251
Abstract. Family‐based case–control designs are commonly used in epidemiological studies for evaluating the role of genetic susceptibility and environmental exposure to risk factors in the etiology of rare diseases. Within this framework, it is often reasonable to assume genetic susceptibility and environmental exposure being conditionally independent of each other within families in the source population. We focus on this setting to explore the situation of measurement error affecting the assessment of the environmental exposure. We correct for measurement error through a likelihood‐based method. We exploit a conditional likelihood approach to relate the probability of disease to the genetic and the environmental risk factors. We show that this approach provides less biased and more efficient results than that based on logistic regression. Regression calibration, instead, provides severely biased estimators of the parameters. The comparison of the correction methods is performed through simulation, under common measurement error structures. 相似文献
184.
王应龙 《宝鸡文理学院学报(社会科学版)》2009,29(2):85-86,96
考证方言本字就是利用语料来恢复词语和字形的对应关系,找回本字;乾县方言火通、横两个字在古今演变时分别由于阴化、文白叠置而与词语失去联系;理清历史音变,找到方言旁证,结合文献证明就可以分别找到方言本字。 相似文献
185.
田烨 《华北电力大学学报(社会科学版)》2010,(2):63-66
改革开放以来,民族地区的经济发展与沿海城市、内地城市的差距越来越大,面临着人与自然如何协调发展、如何进行可持续发展等问题。科学发展观作为中国共产党人集体智慧的结晶,是指导我国经济发展的科学战略,对于我国民族地区经济法制建设具有重要的指导作用。 相似文献
186.
187.
This paper presents a multivariate extension of Dunnett's test for comparing simultaneously k treatment group means with a single control group mean. A test based on Hotelling T2statistics is presented and approximate critical values are evaluated for the case of equal numbers of observations in each group, for the .05 and .01 levels of significance, for 1 to 5 variates, for 1 to 10 treatment groups, and for varying degrees of freedom. The accuracy of the procedure for generating approximate critical values is assessed via simulation studies conducted for selected cases and an example is presented using real data. 相似文献
188.
This paper proposes an optimal combinatorial method for finding groups of industries with relatively large CO2 emissions through industrial relations. Using an economic input–output table, we estimated a non-symmetric matrix describing how much CO2 is emitted in producing the commodity of industry i, which was purchased to produce commodity of industry j, to meet the final demand for a specific commodity. A symmetric strength of relations matrix describing the CO2 emissions associated with the industrial relations was further estimated using the non-symmetric matrix. The strength of relations matrix can be viewed as a representation of the supply-chain network of the final commodity. In this study, we estimated the strength of relations matrix associated with the final demand for automobiles and applied the multiway cut approach using nonnegative matrix factorization to the matrix in order to find environmentally important industry clusters in the Japanese automobile supply chain. According to our empirical results, the optimal number of industry clusters is 19, and 4 industry clusters are playing a key role in CO2 emission reduction. 相似文献
189.
M. L. Tiku 《统计学通讯:模拟与计算》2013,42(4):907-924
For testing that the population correlations coefficientp Q, Tiku and Balakrishnan1986) developed a robust test. This test is extended here to situcitions where one wants to test that p p , p being a specified non-zero value of p. o o 相似文献
190.
The notion of cross-product ratio for discrete two-way contingency table is extended to the case of continuous bivariate densities. This results in the “local dependence function” that measues the margin-free dependence between bivariate random variables. Properties and examples of the dependence function are discussed. The bivariate normal density plays a special role since it has constant dependence. Continuous bivariate densities can be constructed by specifying the dependence function along with two marginals in analogy to the construction of two-way contingency tables given marginals and patterns of interaction. The dependence function provides a partial ordering on bivariate dependence. 相似文献