全文获取类型
收费全文 | 4140篇 |
免费 | 188篇 |
国内免费 | 60篇 |
专业分类
管理学 | 643篇 |
民族学 | 8篇 |
人才学 | 2篇 |
人口学 | 102篇 |
丛书文集 | 283篇 |
理论方法论 | 240篇 |
综合类 | 2246篇 |
社会学 | 405篇 |
统计学 | 459篇 |
出版年
2024年 | 4篇 |
2023年 | 41篇 |
2022年 | 42篇 |
2021年 | 68篇 |
2020年 | 89篇 |
2019年 | 106篇 |
2018年 | 98篇 |
2017年 | 107篇 |
2016年 | 120篇 |
2015年 | 148篇 |
2014年 | 232篇 |
2013年 | 317篇 |
2012年 | 233篇 |
2011年 | 298篇 |
2010年 | 194篇 |
2009年 | 193篇 |
2008年 | 196篇 |
2007年 | 223篇 |
2006年 | 266篇 |
2005年 | 208篇 |
2004年 | 206篇 |
2003年 | 179篇 |
2002年 | 158篇 |
2001年 | 162篇 |
2000年 | 98篇 |
1999年 | 58篇 |
1998年 | 37篇 |
1997年 | 48篇 |
1996年 | 23篇 |
1995年 | 21篇 |
1994年 | 21篇 |
1993年 | 20篇 |
1992年 | 20篇 |
1991年 | 11篇 |
1990年 | 7篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 6篇 |
1986年 | 5篇 |
1985年 | 15篇 |
1984年 | 17篇 |
1983年 | 21篇 |
1982年 | 13篇 |
1981年 | 13篇 |
1980年 | 11篇 |
1979年 | 13篇 |
1978年 | 14篇 |
1977年 | 1篇 |
排序方式: 共有4388条查询结果,搜索用时 15 毫秒
1.
A recent literature emphasizes that gender differences in the labor market may in part be driven by a gender gap in willingness to compete. However, whereas experiments in this literature typically investigate willingness to compete in private environments, real world competitions often have a more public nature, which introduces potential social image concerns. If such image concerns are important, and men and women differ in the degree to which they want to be seen as competitive, making tournament entry decisions publicly observable may further exacerbate the gender gap. We test this prediction using a laboratory experiment (N = 784) that varies the degree to which the decision to compete, and its outcome, is publicly observable. We find that public observability does not alter the magnitude of the gender gap in willingness to compete in an economically or statistically significant way. 相似文献
2.
Dennis Wagenaar Tiaravanni Hermawan Marc J. C. van den Homberg Jeroen C. J. H. Aerts Heidi Kreibich Hans de Moel Laurens M. Bouwer 《Risk analysis》2021,41(1):37-55
Damage models for natural hazards are used for decision making on reducing and transferring risk. The damage estimates from these models depend on many variables and their complex sometimes nonlinear relationships with the damage. In recent years, data‐driven modeling techniques have been used to capture those relationships. The available data to build such models are often limited. Therefore, in practice it is usually necessary to transfer models to a different context. In this article, we show that this implies the samples used to build the model are often not fully representative for the situation where they need to be applied on, which leads to a “sample selection bias.” In this article, we enhance data‐driven damage models by applying methods, not previously applied to damage modeling, to correct for this bias before the machine learning (ML) models are trained. We demonstrate this with case studies on flooding in Europe, and typhoon wind damage in the Philippines. Two sample selection bias correction methods from the ML literature are applied and one of these methods is also adjusted to our problem. These three methods are combined with stochastic generation of synthetic damage data. We demonstrate that for both case studies, the sample selection bias correction techniques reduce model errors, especially for the mean bias error this reduction can be larger than 30%. The novel combination with stochastic data generation seems to enhance these techniques. This shows that sample selection bias correction methods are beneficial for damage model transfer. 相似文献
3.
在刑事非法证据排除规则的具体运用中,"非法证据"的界定是当然前提。非法证据并非是任一证据合法性要件欠缺的广义非法证据,而专指取证主体通过严重非法的手段或者侵犯公民基本权利的方式所获取的证据材料。我国刑事非法证据包括非法言词证据和非法实物证据两类,两类非法证据在实际判断中虽存在差异,但都应围绕取证手段的非法性展开,分别考察取证手段是否违反法律规定以及违法的严重程度,以准确界定刑事非法证据的范围。 相似文献
4.
This paper investigates the effect of cognitive abilities on financial behavior among older adults. Using the U.S. Health and Retirement Study, I find that cognitive abilities significantly affect financial behavior through two channels: ability and self-efficacy. People with higher cognition scores achieve better financial outcomes. This positive association is especially strong in tasks having high demand of cognitive abilities, which confirms the ability channel of the cognitive ability effect. In addition, there is evidence for the self-efficacy channel as a secondary source of cognitive influence. Lower cognitive abilities decrease people’s sense of self-efficacy, which, in turn, significantly decreases financial management efficiency. The findings have important policy implications, specifically that more effort is needed to assist the growing older population through the cognitive aging process and that noncognitive skills, as a secondary source of influence, also warrant attention. 相似文献
5.
Gabriella Modan 《Journal of Sociolinguistics》2002,6(4):487-513
This paper explores the dialectic of place and community identity in Mount Pleasant, a multi–ethnic and multi–class U.S. neighborhood where definitions of place are hotly contested among its residents. In a grant proposal for public toilets, Mount Pleasant writers use linguistic strategies such as presupposition, deixis, and contrast, coupled with discursive themes of filth and geography, to construct a core of the Mount Pleasant community. The writers place themselves and people who share their values in that core, and immigrants at the margins. These strategies serve as a discursive type of spatial purification practice (cf. Sibley 1988) through which the grantwriters set up a moral and spatial order where they and other core community members are deemed to use space ‘appropriately’, and thus inhabit positive moral positions, while immigrant community members’ imputed ‘inappropriate’ use of space is used to construct negative moral positions for them. 相似文献
6.
关于精神损害赔偿制度若干问题的探讨 总被引:2,自引:0,他引:2
盛黎明 《安徽农业大学学报(社会科学版)》2002,11(4):66-68
本文从我国精神损害赔偿制度现存的缺陷入手,通过国内外精神损害赔偿制度的简单对比,分析了我国此制度在主、客体范围和金额确定等方面存在的问题,并就此提出一些解决的办法. 相似文献
7.
选择成年、健康、未孕母兔 32只 ,随机分成 8组 ,分别给予促性腺激素 (Ⅰ组 )、VD3(Ⅱ组 )、VE 亚硒酸钠 (Ⅲ组 ) ,促性腺激素 +VD3(Ⅳ组 )、VD3+VE 亚硒酸钠 (Ⅴ组 )、促性腺激素 +VE 亚硒酸钠(Ⅵ组 )、促性腺激 +VD3+VE 亚硒酸钠 (Ⅶ组 ) ,空白对照 8种处理。试验结果表明 ,母兔经药物处理后 ,其繁殖性能 (发情状况、排卵数、正常受精卵数 )都比对照组显著地提高 ,但Ⅰ、Ⅳ、Ⅵ组有畸形卵子存在 ,以处理Ⅶ组效果最好 ,其排卵数达 4 7± 2 0 .3个 ,正常受精卵 35个 ,分别比对照组多 36 .5个、30个。 相似文献
8.
本文从构块式语法的角度观察双宾语结构和与格结构间构块式意义的差异。用磁体构造模型,结合BROWN语料库统计数值,来阐释双及物动词词义类型与两种构块式选用的关联性,以便准确掌握选用两种构块式的规律。 相似文献
9.
Diane Hope Weixing Zhu Corinna Gries Jacob Oleson Jason Kaye Nancy B. Grimm Lawrence A. Baker 《Urban Ecosystems》2005,8(3-4):251-273
We explored variations in inorganic soil nitrogen (N) concentrations across metropolitan Phoenix, Arizona, and the surrounding
desert using a probability-based synoptic survey. Data were examined using spatial statistics on the entire region, as well
as for the desert and urban sites separately. Concentrations of both NO3-N and NH4-N were markedly higher and more heterogeneous amongst urban compared to desert soils. Regional variation in soil NO3-N concentration was best explained by latitude, land use history, population density, along with percent cover of impervious
surfaces and lawn, whereas soil NH4-N concentrations were related to only latitude and population density. Within the urban area, patterns in both soil NO3-N and NH4-N were best predicted by elevation, population density and type of irrigation in the surrounding neighborhood. Spatial autocorrelation
of soil NO3-N concentrations explained 49% of variation among desert sites but was absent between urban sites. We suggest that inorganic
soil N concentrations are controlled by a number of ‘local’ or ‘neighborhood’ human-related drivers in the city, rather than
factors related to an urban-rural gradient. 相似文献
10.
张唯嘉 《佛山科学技术学院学报(社会科学版)》2002,20(2):23-27
站在现代非人类中心主义的立场上 ,法国新小说理论家罗伯 -格里耶认为物我关系是一种距离关系 ,两者既不同性质 ,也无相辅相成的内在联系。因此 ,他反对巴尔扎克以人化的方式写物。他主张 :1、站在物件之外写物 ;2、描写事物的平面 ;3、记录物我距离而非物我分离 ;4、摈弃人化的语言 ,引入几何学的描写。写物理论是格里耶失误最多的理论之一 ,也是极具原创性、开放性和影响力的理论之一 相似文献