全文获取类型
收费全文 | 3357篇 |
免费 | 128篇 |
国内免费 | 66篇 |
专业分类
管理学 | 226篇 |
民族学 | 29篇 |
人口学 | 153篇 |
丛书文集 | 330篇 |
理论方法论 | 131篇 |
综合类 | 2301篇 |
社会学 | 204篇 |
统计学 | 177篇 |
出版年
2024年 | 7篇 |
2023年 | 26篇 |
2022年 | 27篇 |
2021年 | 44篇 |
2020年 | 54篇 |
2019年 | 54篇 |
2018年 | 71篇 |
2017年 | 65篇 |
2016年 | 96篇 |
2015年 | 96篇 |
2014年 | 210篇 |
2013年 | 290篇 |
2012年 | 252篇 |
2011年 | 266篇 |
2010年 | 212篇 |
2009年 | 210篇 |
2008年 | 209篇 |
2007年 | 228篇 |
2006年 | 210篇 |
2005年 | 184篇 |
2004年 | 181篇 |
2003年 | 147篇 |
2002年 | 138篇 |
2001年 | 112篇 |
2000年 | 57篇 |
1999年 | 25篇 |
1998年 | 13篇 |
1997年 | 5篇 |
1996年 | 10篇 |
1995年 | 13篇 |
1994年 | 7篇 |
1993年 | 7篇 |
1992年 | 5篇 |
1991年 | 5篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 6篇 |
1987年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有3551条查询结果,搜索用时 516 毫秒
121.
Anna Piil Damm 《Journal of population economics》2009,22(1):145-174
This paper exploits a Danish spatial dispersal policy on refugees, which can be regarded as a natural experiment to investigate
the influence of regional factors on recent immigrants’ location choices. The main push factors are lack of co-nationals and
immigrants. Additional push factors are lack of rental, including social, housing and lack of institutions for qualifying
education, which explain why recent immigrants are attracted to large cities. Finally, placed refugees tend to leave locations
with relatively high regional unemployment, and there is indirect evidence of welfare seeking.
相似文献
Anna Piil DammEmail: |
122.
Most of the studies on the determinants of individual gambling behaviour rely on cognitive theories. In our study, we argue that, besides cognitive factors, several social factors might play an important role as well. We analyse data from an ad hoc webmail survey conducted on about 2000 undergraduate students enrolled in a large public university in the Northern Italy in the academic year 2012–13. Using a variety of statistical techniques (standard regression models, boosted regression trees and structural equations models), we show that social variables affect both participation in gambling in the past year and latent gambling propensity. In particular, controlling for several proxies for individual cognitive ability and understanding of probability, gambling propensity is positively affected by the degree of gambling in the social surrounding (parents, peers, neighbourhood) and the acceptability of gambling activities to the individual. Moreover, in our sample of college students the role of social factors appears to be larger than that of cognitive factors, and this is consistent across different types of models and specifications. 相似文献
123.
Ruba M. Jaber Suha F. Khalifeh Fida Bunni Mohamed Ali Diriye 《Journal of women & aging》2017,29(5):428-436
We examined 359 women aged 45–65 years who visited Jordan University Hospital between February and November 2014. The menopausal symptoms were assessed using a validated Arabic version of the menopause rating scale. The mean age at menopause was 49.4 years. Women aged 50–55 years more frequently exhibited hot flushes and vaginal dryness. Although premenopausal women were 1.5 times more likely to experience irritability, perimenopausal women were more likely to experience hot flushes, physical and mental irritability, sexual problems, vaginal dryness, and joint and muscular discomfort. Hence, health care providers should focus on women at all stages of life. 相似文献
124.
Association of the modified frailty index with adverse outcomes after penile prosthesis implantation
Objectives: To investigate frailty as a predictor of surgical outcome in elderly patients undergoing penile prosthesis implantation.Material and methods: A total of 54 elderly patients, above 60 years of age, underwent penile prosthesis implantation between 2012 and 2014. Their data were collected and retrospectively analyzed. A modified frailty index (mFI) was calculated for each patient based on 11 risk factors from the Canadian Study of Health and Aging Frailty Index. The 1-year adverse outcomes were correlated with mFI, patients’ and procedure’s risk factors.Results: Mean age was 64.9?±?5.2 years. No mortality was reported in our patients, however, one-year adverse outcomes were encountered in 43 (79.6%) patients. Among all studied variables, the 1-year adverse outcomes was not significantly association with mFI, but with preoperative glycosylated hemoglobin A1c (HbA1c) (p?=?0.031) and associated Peyronie’s disease (PD) (p?=?0.000). HbA1c, dyslipidemia, hypertension, PD and duration of the procedure were predictive of infection complications (p?0.05). Only PD and HbA1c sustained an independent significant impact.Conclusions: mFI is not a predictive of post-penile prosthesis implantation adverse outcomes in elderly patients with impotence. Degree of diabetic control and association with PD was associated with the 1-year adverse outcomes and infection complications. 相似文献
125.
2016年1月1日起实施的全面二孩政策能否有效地鼓励民众的生育行为,这关乎到我国未来几十年合理调整人口结构、稳固新常态发展的成功与否。本文通过对我国1980-2015年有关生育意愿的国内外文献总结回顾,将生育意愿的内涵界定为数量、时间、性别、动机四个维度,并在此基础上结合国内外学者们的研究归纳得出影响生育意愿的五个方面因素:政策、经济、观念、教育、年龄,以期在新政策背景下展望未来,借鉴国外发展的经验,做好养老、医疗、就业、教育方面的准备措施来迎接全面二孩时代,并为有关生育意愿的进一步研究提供参考。 相似文献
126.
Sandy M. Zgheib Mohammad Kacim Karel Kostev 《Women and birth : journal of the Australian College of Midwives》2017,30(6):e265-e271
Background
During the last decades, there has been an alarming and dramatic increase in the number of cesarean births in both developed and undeveloped countries. This increase has not been clinically justified but, nevertheless, has raised an important number of issues.Aim
The aim of this study was to determine the risk factors associated with the high cesarean section rates in Lebanon.Methods
This study is based on a sample of 29,270 Lebanese women who were pregnant between 2000 and 2015. Among these, 14,327 gave birth by cesarean section and 14,943 gave birth vaginally. To identify the risk factors of cesarean section, logistic regression was applied as a statistical method using the SPSS statistical package.Findings
Of the 29,270 pregnant women included in the study, 49% had cesarean sections while 51% gave birth vaginally. Repeat cesarean section accounted for 23% while vaginal birth after cesarean accounted for only 0.2% of deliveries. In addition, weekdays were associated with a preference of providers to carry out more cesarean sections. According to an analysis of our data using logistic regression, the risk factors associated with the increase in cesarean section rates were advanced maternal age, elective cesarean section, malpresentation of fetus, multiple birth, prolonged pregnancy, prolonged labor, and fetal distress.Conclusion
Based on these results, it is recommended that a new health policy be implemented to reduce the number of unnecessary cesarean deliveries in Lebanon. 相似文献127.
学术期刊是学术和学科建设的重要阵地,应以学术性作为编辑审稿工作的唯一标准。然而,在现有学术评价体制的影响下,这一工作受到了诸多非学术因素的消极干扰,如以作者身份的高低而非稿件质量的高低来取舍稿件。这一非学术性倾向直接影响了审稿的公正性,也削弱了编辑审稿活动的意义,是学术评价异化的一种反映,不利于学术研究的正常进行和健康发展。编辑应该强化责任意识,自觉克服心理因素,排除思维定势,提高学术判断力,重视学术新人的发现和扶持,从而有效发挥学术期刊在学术和学科建设中的积极作用。 相似文献
128.
林琳 《湖南大学学报(社会科学版)》2007,21(5):72-75
风险投资体系以多重激励和不对称信息为特征,风险投资的三方利益主体之间存在着双重委托-代理关系,有效控制代理风险是风险投资高效运作的基本前提。本文基于信息经济学原理,分析了风险投资家与风险企业家之间代理风险的成因,并从委托人的角度讨论了风险治理的原则和投资契约的构造。 相似文献
129.
关于"IT投资是否能提高企业生产率"这一命题,学界一直众说纷纭,一个很重要的原因在于这些研究建立在IT投资能对企业生产率产生直接影响的假设前提之上,而忽略了IT作用于企业生产率的中间过程。IT投资必须与企业内部生产环境相吻合才能提高企业生产率,IT投资转化为企业生产率的影响因素包括内部因素和外部因素,其中内部因素包括企业管理特征、企业员工特征及企业结构特征;外部因素指的是企业所面临的外部环境。 相似文献
130.
大学生参与科研是高校培养双创型人才的重要途径之一,高校经管类专业学生培养存在重理论、轻实践的现象。安徽省8所高校1406名经济管理类学生科研意愿的实证分析表明:年级、学习成绩、科研重要性认知、科研了解程度和学校科研活动开展对大学生科研意愿有显著影响。高校在经管类学生培养过程中应通过加强科研宣传推广、开设科研训练课程、丰富科研活动多样性、激励教师科研指导和开拓校外实践教学基地建设等措施增强学生参与科研的积极性,提升学生的双创能力。 相似文献