全文获取类型
收费全文 | 13249篇 |
免费 | 287篇 |
国内免费 | 1篇 |
专业分类
管理学 | 1812篇 |
民族学 | 44篇 |
人才学 | 6篇 |
人口学 | 1204篇 |
丛书文集 | 47篇 |
理论方法论 | 1141篇 |
综合类 | 192篇 |
社会学 | 6020篇 |
统计学 | 3071篇 |
出版年
2023年 | 78篇 |
2020年 | 181篇 |
2019年 | 272篇 |
2018年 | 278篇 |
2017年 | 429篇 |
2016年 | 278篇 |
2015年 | 230篇 |
2014年 | 275篇 |
2013年 | 2388篇 |
2012年 | 425篇 |
2011年 | 338篇 |
2010年 | 288篇 |
2009年 | 255篇 |
2008年 | 336篇 |
2007年 | 343篇 |
2006年 | 293篇 |
2005年 | 269篇 |
2004年 | 249篇 |
2003年 | 211篇 |
2002年 | 255篇 |
2001年 | 307篇 |
2000年 | 264篇 |
1999年 | 265篇 |
1998年 | 225篇 |
1997年 | 221篇 |
1996年 | 195篇 |
1995年 | 185篇 |
1994年 | 172篇 |
1993年 | 197篇 |
1992年 | 221篇 |
1991年 | 192篇 |
1990年 | 211篇 |
1989年 | 184篇 |
1988年 | 194篇 |
1987年 | 189篇 |
1986年 | 171篇 |
1985年 | 166篇 |
1984年 | 176篇 |
1983年 | 162篇 |
1982年 | 158篇 |
1981年 | 122篇 |
1980年 | 140篇 |
1979年 | 176篇 |
1978年 | 132篇 |
1977年 | 130篇 |
1976年 | 128篇 |
1975年 | 139篇 |
1974年 | 101篇 |
1973年 | 89篇 |
1972年 | 80篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Researchers have been developing various extensions and modified forms of the Weibull distribution to enhance its capability for modeling and fitting different data sets. In this note, we investigate the potential usefulness of the new modification to the standard Weibull distribution called odd Weibull distribution in income economic inequality studies. Some mathematical and statistical properties of this model are proposed. We obtain explicit expressions for the first incomplete moment, quantile function, Lorenz and Zenga curves and related inequality indices. In addition to the well-known stochastic order based on Lorenz curve, the stochastic order based on Zenga curve is considered. Since the new generalized Weibull distribution seems to be suitable to model wealth, financial, actuarial and especially income distributions, these findings are fundamental in the understanding of how parameter values are related to inequality. Also, the estimation of parameters by maximum likelihood and moment methods is discussed. Finally, this distribution has been fitted to United States and Austrian income data sets and has been found to fit remarkably well in compare with the other widely used income models. 相似文献
2.
3.
Arnfinn H. Midtbøen 《The British journal of sociology》2015,66(1):193-214
Although field experiments have documented the contemporary relevance of discrimination in employment, theories developed to explain the dynamics of differential treatment cannot account for differences across organizational and institutional contexts. In this article, I address this shortcoming by presenting the main empirical findings from a multi‐method research project, in which a field experiment of ethnic discrimination in the Norwegian labour market was complemented with forty‐two in‐depth interviews with employers who were observed in the first stage of the study. While the experimental data support earlier findings in documenting that ethnic discrimination indeed takes place, the qualitative material suggests that theorizing in the field experiment literature have been too concerned with individual and intra‐psychic explanations. Discriminatory outcomes in employment processes seems to be more dependent on contextual factors such as the number of applications received, whether requirements are specified, and the degree to which recruitment procedures are formalized. I argue that different contexts of employment provide different opportunity structures for discrimination, a finding with important theoretical and methodological implications. 相似文献
4.
5.
生命本身是一个随机事件,并不具有高尚的意义。进化的结果使人类可通过工作、家庭和人际关系等给予自己的生命以意义感。当我们的生活方式使脑内奖赏系统获得刺激,就会带来生命具有意义的感受,这种感受给人带来更好的生存机会。生存的欲望是一切生物体最具特征的属性,一些精神疾病患者缺乏这种欲望。自杀主要发生于精神疾病患者,它并非是基于自由意志的行为。抗精神病治疗和适当的社会交往可以预防自杀。由于不同个体有着不同的大脑,人们的生活方式就应该去适应各自大脑的特征。只要人们的生活方式不对他人造成过多的伤害,政府就应该允许和保护人们自由地按照各自的方式生活。 相似文献
6.
7.
8.
Measures of Multigroup Segregation 总被引:3,自引:0,他引:3
In this paper we derive and evaluate measures of multigroup segregation. After describing four ways to conceptualize the measurement of multigroup segregation—as the disproportionality in group (e.g., race) proportions across organizational units (e.g., schools or census tracts), as the strength of association between nominal variables indexing group and organizational unit membership, as the ratio of between–unit diversity to total diversity, and as the weighted average of two–group segregation indices—we derive six multigroup segregation indices: a dissimilarity index (D), a Gini index (G), an information theory index (H), a squared coefficient of variation index (C), a relative diversity index (R), and a normalized exposure index (P). We evaluate these six indices against a set of seven desirable properties of segregation indices. We conclude that the information theory index H is the most conceptually and mathematically satisfactory index, since it alone obeys the principle of transfers in the multigroup case. Moreover, H is the only multigroup index that can be decomposed into a sum of between– and within–group components. 相似文献
9.
H. Küchenhoff 《Statistical Papers》1995,36(1):41-47
The simple logistic regression model with normal measurement error and normal regressor is shown to be identifiable without any extra information about the measurement error. The multiple logistic regression model with more than one regressor variable measured with error is not identifiable. If the covariance matrix of the measurement error is known up to a scalar factor, the model is identified. Further we discuss why in spite of the identifiability the models cannot be estimated in a reasonable way without extra information about the measurement error. 相似文献
10.