全文获取类型
收费全文 | 422篇 |
免费 | 23篇 |
国内免费 | 4篇 |
专业分类
管理学 | 82篇 |
民族学 | 1篇 |
人口学 | 14篇 |
丛书文集 | 15篇 |
理论方法论 | 29篇 |
综合类 | 181篇 |
社会学 | 36篇 |
统计学 | 91篇 |
出版年
2024年 | 4篇 |
2023年 | 7篇 |
2022年 | 17篇 |
2021年 | 14篇 |
2020年 | 15篇 |
2019年 | 16篇 |
2018年 | 11篇 |
2017年 | 17篇 |
2016年 | 34篇 |
2015年 | 19篇 |
2014年 | 21篇 |
2013年 | 45篇 |
2012年 | 22篇 |
2011年 | 15篇 |
2010年 | 23篇 |
2009年 | 23篇 |
2008年 | 25篇 |
2007年 | 21篇 |
2006年 | 20篇 |
2005年 | 26篇 |
2004年 | 11篇 |
2003年 | 9篇 |
2002年 | 5篇 |
2001年 | 4篇 |
2000年 | 7篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1989年 | 3篇 |
1988年 | 1篇 |
排序方式: 共有449条查询结果,搜索用时 0 毫秒
41.
This paper examines if ‘naming and shaming’ is an effective tool to increase accountability in school dropout for cities with disadvantaged student populations. It argues that a comparison with other cities might be unfair if regional and population characteristics differ. It discusses the example of two Dutch new towns. The new town policy deliberately attracted low- and medium-income households in the past, such that today the population of those cities differs from other cities. We use a matching analysis to account for observed differences in population and regional characteristics. The results point out that ‘naming and shaming’ may be a dangerous policy to increase accountability: early school leaving differences are driven, to a large extent, by observed differences in population and regional characteristics. 相似文献
42.
For the balanced variance component model when the intraclass correlation coefficient is of interest, Bayesian analysis is often appropriate. Berger and Bernardo’s (1992a) grouped ordering reference prior approach is used to analyze this model. The reference priors are developed and compared for the posterior inference with real and simulated data. We examine whether the reference priors satisfy the probability-matching criterion. Further, the reference prior is shown to be good in the sense of correct frequentist coverage probability of the posterior quantile. 相似文献
43.
In this paper, we consider noninformative priors for the ratio of variances in two normal populations. We develop first and
second order matching priors. We find that the second order matching prior matches alternative coverage probabilities up to
the second order and is also a HPD matching prior. It turns out that among the reference priors, only one-at-a-time reference
prior satisfies a second order matching criterion. Our simulation study indicates that the one-at-a-time reference prior performs
better than other reference priors in terms of matching the target coverage probabilities in a frequentist sense.
This work is supported by Korea Research Foundation Grant (KRF-2004-002-C00041). 相似文献
44.
采用边缘匹配和区域相关相结合的办法,用Gauss-Laplace算子首先对图像进行运算,提取图像的边缘像素,并根据一定约束条件匹配边缘像素,再将图像对视作对称,以相关值互为最大来确定其余点的匹配关系。用该方法处理经过良好校正的图像对,在VC 环境下可实现浓密视差图的快速提取。 相似文献
45.
张文闻 《西华师范大学学报(自然科学版)》2004,(2):30-33
我国开征遗产税有其可行性和必要性,构建遗产税的立法体系,必须明确遗产税的纳税人、纳税对象、起征点、税率征管等一系列问题。此外,为保证遗产税的顺利实施,我国还应具体实行其他配套的法律法规和措施。 相似文献
46.
魏静 《吉林工程技术师范学院学报》2003,(1)
领带同其他服饰一样,是人类独有的文化特征。它标示着穿戴者的个性与气质、品位与能力,并以醒目的位置与独特的功能为人们所青睐。本文从领带的演变、种类、式样等方面阐述了领带的服饰文化,旨提高人们的审美意识与佩戴水准。 相似文献
47.
本文对双对对称双脊波导进行了系统的分析,根据对称性分区求解了 Helmholtz 方程.将TR 波分为四类模式,得出了每类模式在各区中解的形式,从物理上得出了这种波导中模式问题的清楚解释,由分界面上的匹配条件导出了矩阵方程.本文计算得出的基模及高次模的截止频率和场分布从物理意义上均能很好地吻合. 相似文献
48.
Wendy Sigle‐Rushton 《Journal of marriage and the family》2005,67(3):735-753
Although there has been increasing attention to the importance of fathers and their relationships with their children, few studies have examined young parenthood and its consequences for fathers’ life chances. In recent years, this has begun to change, and research is examining, to a far greater extent, the experiences of young fathers. Using data from a cohort of British men born in 1970, this paper uses a propensity score–matching technique to compare the well‐being of 344 men who reported becoming fathers before the age of 22 with men from similar backgrounds who did not. The findings suggest that selection into young fatherhood is substantial but, for some outcomes, significant differences remain. 相似文献
49.
点模式指纹匹配算法研究与实现 总被引:3,自引:0,他引:3
指纹匹配是实现指纹识别的重要环节,针对如何提高识别率、减少算法复杂度,介绍了一种点模式的指纹匹配算法。其优点是:将匹配分为两步进行,减少了拒判时间;初匹配利用了细节点间的局部结构关系,既克服了图像的平移和旋转也得到了更精确的坐标校准参数;二次匹配阶段,整合多种判决条件作为识别的依据,提高了识别率。其实验结果表明,该算法复杂度低,识别率较高,有较强实用价值。 相似文献
50.
Behavior analysts have offered accounts of the behavior involved in matching to sample and delayed matching to sample. But until recently have not offered a behavioral analysis of generalized matching-to-sample. The concept of joint control, however, seems especially suited to such an analysis The present study used a joint-control procedure to train five adult women to acquire a generalized sequencing behavior using an unfamiliar language. After joint-control training the participants were able to produce untrained picture sequences, and blocking the mediating response during the sequencing task resulted in a reduction in the number of accurate sequences. These results clearly support response mediation as a precurrent to various kinds of complex human behavior. 相似文献