全文获取类型
收费全文 | 298688篇 |
免费 | 9649篇 |
国内免费 | 2650篇 |
专业分类
管理学 | 30243篇 |
劳动科学 | 171篇 |
民族学 | 3249篇 |
人才学 | 71篇 |
人口学 | 13948篇 |
丛书文集 | 22617篇 |
理论方法论 | 18844篇 |
综合类 | 136206篇 |
社会学 | 57696篇 |
统计学 | 27942篇 |
出版年
2024年 | 715篇 |
2023年 | 2483篇 |
2022年 | 5340篇 |
2021年 | 6879篇 |
2020年 | 6517篇 |
2019年 | 6361篇 |
2018年 | 7016篇 |
2017年 | 9215篇 |
2016年 | 7044篇 |
2015年 | 7360篇 |
2014年 | 11353篇 |
2013年 | 27520篇 |
2012年 | 16541篇 |
2011年 | 18483篇 |
2010年 | 18404篇 |
2009年 | 18555篇 |
2008年 | 19142篇 |
2007年 | 19413篇 |
2006年 | 18324篇 |
2005年 | 15781篇 |
2004年 | 11295篇 |
2003年 | 8068篇 |
2002年 | 8449篇 |
2001年 | 7649篇 |
2000年 | 4790篇 |
1999年 | 3027篇 |
1998年 | 2135篇 |
1997年 | 1839篇 |
1996年 | 1714篇 |
1995年 | 1516篇 |
1994年 | 1434篇 |
1993年 | 1192篇 |
1992年 | 1241篇 |
1991年 | 1133篇 |
1990年 | 1093篇 |
1989年 | 932篇 |
1988年 | 909篇 |
1987年 | 815篇 |
1986年 | 761篇 |
1985年 | 849篇 |
1984年 | 839篇 |
1983年 | 785篇 |
1982年 | 674篇 |
1981年 | 616篇 |
1980年 | 541篇 |
1979年 | 584篇 |
1978年 | 513篇 |
1977年 | 432篇 |
1976年 | 424篇 |
1975年 | 397篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Multinomial logit (also termed multi-logit) models permit the analysis of the statistical relation between a categorical response variable and a set of explicative variables (called covariates or regressors). Although multinomial logit is widely used in both the social and economic sciences, the interpretation of regression coefficients may be tricky, as the effect of covariates on the probability distribution of the response variable is nonconstant and difficult to quantify. The ternary plots illustrated in this article aim at facilitating the interpretation of regression coefficients and permit the effect of covariates (either singularly or jointly considered) on the probability distribution of the dependent variable to be quantified. Ternary plots can be drawn both for ordered and for unordered categorical dependent variables, when the number of possible outcomes equals three (trinomial response variable); these plots allow not only to represent the covariate effects over the whole parameter space of the dependent variable but also to compare the covariate effects of any given individual profile. The method is illustrated and discussed through analysis of a dataset concerning the transition of master’s graduates of the University of Trento (Italy) from university to employment. 相似文献
2.
3.
ABSTRACTScholarly textbooks often follow a logic where suitable empirical cases are selected to illustrate the theoretical and analytical points that we as scholars want to make. But what would happen if we would do the opposite: build a textbook on a novel written by a novelist for such purpose and let the theories explain the actions and emotions of fictional characters? In this article, we share and reflect upon our experiences of co-authoring a textbook in organization theory together with a professional novelist. We argue that the novel can function as an eye-opener in organizational analysis, forcing us to look beyond more static and rationalistic perspectives on organizations as well as the stereotypes of such. We build and relate our experiences to the growing literature about using fiction in scholarly work and discuss the potential of such genre-bending work when we bring in flesh and blood into the analyses. 相似文献
4.
Safa Ali Ahmed Amar Recep Eryilmaz Halit Demir Serdar Aykan Canan Demir 《The aging male》2019,22(3):198-206
In this study, the antioxidant enzyme activities such as (SOD, GSH, and CAT) and malondialdehyde (MDA) level which is the end product of lipid peroxidation, were determined from the serum samples taken from patients diagnosed with prostate cancer Van Yuzuncu Y?l University Medical Faculty of Educational Research and Training Hospital and ?stanbul Bagcilar Education Research Hospital. The SOD, GSH, and CAT activity of patient groups was found significantly lower than the healthy control group in patients with prostate cancer (p?.05). Serum MDA level is found significantly high when compared to control groups. MDA levels increased in patients that suffer prostate cancer disorder. Whereas, firstly antioxidant enzymes activity of SOD, GSH and CAT have been decreased in control groups. Thus, we concluded that the cause of development of prostate cancer may be the result of an imbalance between the antioxidants and oxidative stress. As a result, SOD, CAT, GSH, and MDA may play an important role in the etiopathogenesis of prostate cancer. 相似文献
5.
AbstractWeak convergence and moment convergence issues are investigated for the New Better than Average Failure Rate (NBAFR) family (introduced by Loh (1984)). We explore the validity of these results in the context of a more general ageing class that we introduce. We prove some new properties of this class and derive its interrelationships with other non-monotonic ageing families. Reliability and moment bounds are obtained and an interesting characterization of exponentiality is proved. Special cases of our results lead to new theorems for the NBAFR class. Finally weak convergence and related issues are established for this class. 相似文献
6.
7.
8.
中华民族有着丰富的民俗文化,其中,有许多是与树木有关的,文章就此探讨了树木崇拜及其引发的社会行为。 相似文献
9.
试论投资基金的治理结构 总被引:1,自引:0,他引:1
投资基金的治理结构包含三个层次,即基金的各方当事人权利义务的制度安排、基金内部约束机制、外部市场压力及监管制度。针对我国基金治理结构目前存在的问题,可通过引入独立董事制度、将基金经理的报酬机制与公司的经营业绩挂钩、增强外部市场的竞争压力等途径,使之逐步完善。 相似文献
10.
现代文学史上的著名作家郁达夫留学日本近十载,十年的留学生活使他对日本这个民族有了深刻的了解.本文试图中从其<沉沦>三部曲中窥视郁达夫笔下的日本是怎样在文本中发生了"变态"作一尝试. 相似文献