全文获取类型
收费全文 | 17592篇 |
免费 | 662篇 |
国内免费 | 105篇 |
专业分类
管理学 | 838篇 |
劳动科学 | 2篇 |
民族学 | 306篇 |
人才学 | 3篇 |
人口学 | 103篇 |
丛书文集 | 2552篇 |
理论方法论 | 1000篇 |
综合类 | 12066篇 |
社会学 | 880篇 |
统计学 | 609篇 |
出版年
2024年 | 8篇 |
2023年 | 112篇 |
2022年 | 399篇 |
2021年 | 174篇 |
2020年 | 188篇 |
2019年 | 212篇 |
2018年 | 229篇 |
2017年 | 249篇 |
2016年 | 287篇 |
2015年 | 404篇 |
2014年 | 934篇 |
2013年 | 1112篇 |
2012年 | 1198篇 |
2011年 | 1294篇 |
2010年 | 1017篇 |
2009年 | 1123篇 |
2008年 | 1131篇 |
2007年 | 1322篇 |
2006年 | 1306篇 |
2005年 | 1191篇 |
2004年 | 1072篇 |
2003年 | 1033篇 |
2002年 | 902篇 |
2001年 | 690篇 |
2000年 | 371篇 |
1999年 | 79篇 |
1998年 | 35篇 |
1997年 | 41篇 |
1996年 | 42篇 |
1995年 | 25篇 |
1994年 | 20篇 |
1993年 | 25篇 |
1992年 | 13篇 |
1991年 | 9篇 |
1990年 | 6篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1985年 | 10篇 |
1984年 | 20篇 |
1983年 | 19篇 |
1982年 | 18篇 |
1981年 | 15篇 |
1980年 | 6篇 |
1979年 | 9篇 |
1978年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
1.
刘芹 《上海理工大学学报(社会科学版)》2021,43(3):212-219
近日对我国著名电子光学和光电子成像专家周立伟院士进行了访谈。访谈中,周院士首先分享了自己学习英语和俄语的经历,强调了自主学习能力的重要性;其次,周院士详细论述了外语教学,尤其是英语教学的必要性,指出英语能力与科学研究紧密相关,英语教学不可或缺;之后周院士分析了研究生在英语学习和科学研究方面存在的问题,并讨论了大学中开设人文课程的迫切性;最后,周院士对上理工师生提出了建议与期望。 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.
尚丽姝 《安徽理工大学学报(社会科学版)》2021,23(1):65-73
宋蒙战争是一场关乎南宋最终命运走向的战争,宋末诗家心系时局,以诗为史,反映战事进展。局部战争时期,李曾伯、魏了翁等人在诗中表达对川蜀局势的关切。蒙古分三路正式进攻南宋后,王同祖在金陵幕中以诗专记战时应对之策与襄樊、江淮战事,补充了正史之外的细节。钓鱼城大捷后,刘克庄等人除以诗相庆外,还对战局的走向充满忧思。至襄樊战败,诗家对贾似道误国一事进行了激烈谴责,并痛心宋廷无人堪用、无计可施的可悲现实。至全面决战、临安陷落前后,宋人面对家国遽变,其诗作又有多重心态的呈现。 相似文献
4.
Environmental scanning is a broadly defined concept, having first received attention from scholars in the late 1960s. Over the years a number of similar and overlapping constructs have emerged in management literature. The aim of this study, via a systematic review and thematic analysis of relevant empirical research, is to consolidate foundation environmental scanning knowledge, demonstrate how scanning research has developed and fragmented over time, and propose an agenda for future research. The first contribution of our review is a new typology of environmental scanning research made up of five discrete research views, which provides a more comprehensive and contemporary overview of the field than previous studies. The second is a proposed agenda for future research that explicitly acknowledges the role of technology, an area that is presently underdeveloped in foundation scanning literature. The third contribution is to signpost future directions for research on scanning and organisational performance using a number of theoretical perspectives. The overall outcome of our review is to move scanning research on from increasingly incremental contributions concerned with context to a place where the changing role of technology and the mechanisms through which environmental scanning contributes to competitive advantage can be more thoroughly understood. 相似文献
5.
Factors associated with a positive childbirth experience in Brazilian women: A cross-sectional study
《Women and birth : journal of the Australian College of Midwives》2021,34(4):e337-e345
BackgroundHaving a positive childbirth experience is an increasingly valued outcome. Few studies evaluated the women’s satisfaction with childbirth through face-to-face interviews out of the health service environment. The objective of this study was to identify factors associated with a higher level of satisfaction with the childbirth experience among Brazilian women.MethodsThis cross-sectional study involved 287 women giving birth in two hospitals in southern Brazil. Women who gave birth to healthy newborns at term were randomly selected. Face-to-face interviews were conducted 31–37 days after delivery, at the mothers’ homes, using a structured questionnaire. Satisfaction with the childbirth experience was measured using a Likert-type scale ranging from very satisfied to very dissatisfied. Prevalence ratios (PR) were estimated using Poisson regression with robust variance.ResultsFollowing hierarchical multivariate analysis, the following factors remained associated with a higher level of satisfaction with the childbirth experience: being satisfied with antenatal care (PR = 1.30; 95% confidence interval [95%CI] = 1.06−1.59), understanding the information provided by health professionals during labor and delivery (PR = 1.40; 95%CI = 1.01−1.95), not having reported disrespect and abuse (PR = 1.53; 95%CI = 1.01−2.31), and having had the baby put to the breast within the first hour of life (PR = 1.63; 95%CI = 1.26−2.11). No association was observed with type of delivery or hospital status (public or private).ConclusionsA higher level of satisfaction with the childbirth experience is related to satisfactory antenatal care, a non-abusive, respectful, and informative environment during childbirth, and to the opportunity to breastfeed the baby within the first hour of life. In clinical practice, greater attention to these basic principles of care during pregnancy and delivery could provide more positive experiences during birth. 相似文献
6.
王润滋 《盐城工学院学报(社会科学版)》2019,32(3):114-118
以高中生为被试对象,以大陆漂移论为素材,研究外部视觉情绪设计对多媒体学习的影响。结果表明,接受情绪设计组(实验组)的积极情绪显著高于中性组(对照组);实验组与对照组内在认知负荷、相关认知负荷均无显著差异,外在认知负荷小于对照组;实验组保持测验成绩显著高于对照组,迁移测验成绩无差异。同时,外部视觉情绪设计能显著提高多媒体学习效果。外部视觉情绪设计的实验设计突破了已有研究300s学习素材的诱发时间,拓展了多媒体学习情绪设计的内涵。 相似文献
7.
李春雷 《赤峰学院学报(汉文哲学社会科学版)》2021,(1)
本文通过《辽史》的记载,并结合考古出土的文物,对辽代骆驼的来源和用途进行了剖析和论证,认为辽代骆驼的来源主要有战争掠夺和属国、属族进贡两种方式,而辽代骆驼的用途主要有驼运、骑车、驼载、驾车、纺织、捐官等,以此最终说明骆驼在辽代社会中占有非常重要的作用。 相似文献
8.
刘桂侠 《西南农业大学学报(社会科学版)》2019,6(5):96-104
体验式学习的内涵随着时代的发展而逐渐丰富和深化,但无论其如何演变,直接经验和反思始终是体验式学习这一概念的内核。体验式学习理念渗透于美国教育文化之中。具体表现在:小学阶段的教育以学生的真实感知为基础,注重为学生提供真实体验的机会和激发学生的学习兴趣;中学尤其是高中阶段的教育以学生的真实体验为基础,注重为学生提供在新情境中检验所学知识的机会,注重学生知识、技能的内化吸收。美国中小学体验式学习的实施经验可为我国基础教育课程改革提供如下启示:(1)进一步树立和推广体验式学习理念;(2)创设学生进行真实体验的教学环境;(3)注重实施基于学生体验式学习的表现性评价。 相似文献
9.
The evidence‐based policymaking relies on the use and robustness of the available data. Many conceptual and operational difficulties restrict this process, not least in making use of evidence to identify policy priorities. The Active Ageing Index (AAI), developed originally for the 28 European Union countries, offers a strong motivation in this respect. This paper reports on the development of the AAI for Korea, a country where speed and level of population aging is among the highest in the world. Drawing on the comparative analysis of the AAI results for Korea, China, and European countries, we find that Korea's AAI (35.3) is higher than the average of the AAI for all EU countries (33.9) but lower than China (37.3). Fitting Korea into the overall ranking with the EU countries and China (ranked 7), Korea is ranked 11, just behind Germany (10). The AAI results in Korea show that the employment domain performs extremely well compared with the EU countries, but other domains, especially “Social participation” and “Independent, healthy and secure living,” are achieving less favorable outcomes. High employment among the current cohorts of older workers in Korea can be attributed largely to the constraints of low pension income status. 相似文献
10.
可祥 《宁波大学学报(人文科学版)》2022,(3):44-48
孤山智圆是北宋天台宗山外派的著名学僧,也是宋代倡导儒佛互融的代表性人物。智圆一生致力于天台三观,同时又“刻心净土”,力求以天台宗圆教的“心性”论统摄净土法门的“唯心净土”,又以“心性”为诸法之体来消解净秽二土之别。智圆不仅是“唯心净土”论者,也是“实在净土”的坚定信仰者,其净土思想具有鲜明的“唯心净土”和“实在净土”两重性。 相似文献