全文获取类型
收费全文 | 8092篇 |
免费 | 70篇 |
专业分类
管理学 | 1211篇 |
民族学 | 27篇 |
人口学 | 767篇 |
丛书文集 | 26篇 |
理论方法论 | 593篇 |
综合类 | 105篇 |
社会学 | 3409篇 |
统计学 | 2024篇 |
出版年
2021年 | 45篇 |
2020年 | 129篇 |
2019年 | 167篇 |
2018年 | 218篇 |
2017年 | 274篇 |
2016年 | 199篇 |
2015年 | 132篇 |
2014年 | 190篇 |
2013年 | 1315篇 |
2012年 | 263篇 |
2011年 | 241篇 |
2010年 | 178篇 |
2009年 | 170篇 |
2008年 | 145篇 |
2007年 | 183篇 |
2006年 | 160篇 |
2005年 | 161篇 |
2004年 | 146篇 |
2003年 | 143篇 |
2002年 | 149篇 |
2001年 | 197篇 |
2000年 | 189篇 |
1999年 | 172篇 |
1998年 | 129篇 |
1997年 | 126篇 |
1996年 | 126篇 |
1995年 | 106篇 |
1994年 | 104篇 |
1993年 | 97篇 |
1992年 | 140篇 |
1991年 | 119篇 |
1990年 | 117篇 |
1989年 | 112篇 |
1988年 | 96篇 |
1987年 | 91篇 |
1986年 | 95篇 |
1985年 | 107篇 |
1984年 | 112篇 |
1983年 | 123篇 |
1982年 | 99篇 |
1981年 | 88篇 |
1980年 | 85篇 |
1979年 | 94篇 |
1978年 | 90篇 |
1977年 | 80篇 |
1976年 | 67篇 |
1975年 | 67篇 |
1974年 | 58篇 |
1973年 | 58篇 |
1971年 | 49篇 |
排序方式: 共有8162条查询结果,搜索用时 15 毫秒
101.
102.
K.E. Kushner N. Sopcak R. Breitkreuz N. Pitre D.L. Williamson G. Rempel 《Community, Work & Family》2017,20(2):119-141
We examined first-time fathers’ and mothers’ perspectives about their ideal world of support in the context of dominant social ideology, ethno-cultural ideals, and the pragmatics of their everyday family, workplace, and socioeconomic circumstances during their first 18 months as parents. Twelve Canadian-born and six Chinese immigrant couples participated in individual in-depth interviews. We conducted a three-part analysis: fathers’ perspectives, mothers’ perspectives, and couples’ perspectives. Fathers focused on fulfilling dual fathering ideals of ‘time with family’ and ‘providing for family’; mothers emphasized fulfilling a mothering ideal of ‘caring for children'. Examining couples’ perspectives revealed a more nuanced understanding of their shared focus on ‘caring for family'. Parents in this study found the current social ideal of the ‘new’ father, who is both financial provider and nurturing co-parent, appealing, yet difficult to achieve. Couples wanted informal (i.e. family and social network) support, along with formal (i.e. workplace and childcare) support to enable them to provide family care and financial stability for their family. Findings contribute to understanding family and paid work experiences and decision-making among couples as new parents. We offer insights into the complexity of intersections among social ideals, personal expectations, family care, and paid work for fathers and mothers. 相似文献
103.
Hans Skott-Myhre Brad McDonald Kathleen S. G. Skott-Myhre 《Journal of Progressive Human Services》2017,28(3):164-178
In this article, we trace the rise of neoliberalism and its impacts on the historical role of human services within the academy and the community. We ask whether we can re-think and re-envision a 21st century academy rooted in the material actualities of daily living and connected in very real ways to the struggles of those Human Services was designed to serve. Finally, we propose that Human Services could have a significant role to play in developing new modes of value that could lead to new modes of thought and new avenues of praxis. 相似文献
104.
Nurlan S. Orazalin;Collins G. Ntim;John K. Malagila; 《英国管理杂志》2024,35(1):295-320
We examine the interrelationships among board sustainability committees, process-based climate change initiatives, outcome-based carbon performance, and market value through the lens of economic- and social-based theoretical perspectives. Using a panel dataset of 8408 observations from 35 countries between 2002 and 2019, we find that higher levels of actual greenhouse gas (GHG) emissions are negatively associated with market value. Further, we reveal a positive association between process-based climate change initiatives and market value. We then provide evidence that process-based climate change initiatives are positively related to increased levels of GHG emissions. We also observe that the presence of a board sustainability committee has a positive impact on market value, but does not seem to improve outcome-based carbon performance. Finally, we show that the predicted relationships vary across different country-groups, sector-groups, and periods. Our empirical findings are robust to alternative measures, endogeneities, and sample selection bias. Overall, our evidence supports the symbolic legitimation/greenwashing view, in that firms are likely to employ process-based climate change initiatives under a symbolic approach to create positive impressions among stakeholders and protect their legitimacy. 相似文献
105.
Lars König;Steffen Zitzmann;Tim Fütterer;Diego G. Campos;Ronny Scherer;Martin Hecht; 《Research Synthesis Methods》2024,15(6):1120-1146
Several AI-aided screening tools have emerged to tackle the ever-expanding body of literature. These tools employ active learning, where algorithms sort abstracts based on human feedback. However, researchers using these tools face a crucial dilemma: When should they stop screening without knowing the proportion of relevant studies? Although numerous stopping rules have been proposed to guide users in this decision, they have yet to undergo comprehensive evaluation. In this study, we evaluated the performance of three stopping rules: the knee method, a data-driven heuristic, and a prevalence estimation technique. We measured performance via sensitivity, specificity, and screening cost and explored the influence of the prevalence of relevant studies and the choice of the learning algorithm. We curated a dataset of abstract collections from meta-analyses across five psychological research domains. Our findings revealed performance differences between stopping rules regarding all performance measures and variations in the performance of stopping rules across different prevalence ratios. Moreover, despite the relatively minor impact of the learning algorithm, we found that specific combinations of stopping rules and learning algorithms were most effective for certain prevalence ratios of relevant abstracts. Based on these results, we derived practical recommendations for users of AI-aided screening tools. Furthermore, we discuss possible implications and offer suggestions for future research. 相似文献
106.
Edoardo G. Ostinelli;Orestis Efthimiou;Yan Luo;Clara Miguel;Eirini Karyotaki;Pim Cuijpers;Toshi A. Furukawa;Georgia Salanti;Andrea Cipriani; 《Research Synthesis Methods》2024,15(5):758-768
When studies use different scales to measure continuous outcomes, standardised mean differences (SMD) are required to meta-analyse the data. However, outcomes are often reported as endpoint or change from baseline scores. Combining corresponding SMDs can be problematic and available guidance advises against this practice. We aimed to examine the impact of combining the two types of SMD in meta-analyses of depression severity. We used individual participant data on pharmacological interventions (89 studies, 27,409 participants) and internet-delivered cognitive behavioural therapy (iCBT; 61 studies, 13,687 participants) for depression to compare endpoint and change from baseline SMDs at the study level. Next, we performed pairwise (PWMA) and network meta-analyses (NMA) using endpoint SMDs, change from baseline SMDs, or a mixture of the two. Study-specific SMDs calculated from endpoint and change from baseline data were largely similar, although for iCBT interventions 25% of the studies at 3 months were associated with important differences between study-specific SMDs (median 0.01, IQR −0.10, 0.13) especially in smaller trials with baseline imbalances. However, when pooled, the differences between endpoint and change SMDs were negligible. Pooling only the more favourable of the two SMDs did not materially affect meta-analyses, resulting in differences of pooled SMDs up to 0.05 and 0.13 in the pharmacological and iCBT datasets, respectively. Our findings have implications for meta-analyses in depression, where we showed that the choice between endpoint and change scores for estimating SMDs had immaterial impact on summary meta-analytic estimates. Future studies should replicate and extend our analyses to fields other than depression. 相似文献
107.
Kylie E. Hunter;Mason Aberoumand;Sol Libesman;James X. Sotiropoulos;Jonathan G. Williams;Jannik Aagerup;Rui Wang;Ben W. Mol;Wentao Li;Angie Barba;Nipun Shrestha;Angela C. Webster;Anna Lene Seidler; 《Research Synthesis Methods》2024,15(6):917-939
Increasing concerns about the trustworthiness of research have prompted calls to scrutinise studies' Individual Participant Data (IPD), but guidance on how to do this was lacking. To address this, we developed the IPD Integrity Tool to screen randomised controlled trials (RCTs) for integrity issues. Development of the tool involved a literature review, consultation with an expert advisory group, piloting on two IPD meta-analyses (including 73 trials with IPD), preliminary validation on 13 datasets with and without known integrity issues, and evaluation to inform iterative refinements. The IPD Integrity Tool comprises 31 items (13 study-level, 18 IPD-specific). IPD-specific items are automated where possible, and are grouped into eight domains, including unusual data patterns, baseline characteristics, correlations, date violations, patterns of allocation, internal and external inconsistencies, and plausibility of data. Users rate each item as having either no issues, some/minor issue(s), or many/major issue(s) according to decision rules, and justification for each rating is recorded. Overall, the tool guides decision-making by determining whether a trial has no concerns, some concerns requiring further information, or major concerns warranting exclusion from evidence synthesis or publication. In our preliminary validation checks, the tool accurately identified all five studies with known integrity issues. The IPD Integrity Tool enables users to assess the integrity of RCTs via examination of IPD. The tool may be applied by evidence synthesists, editors and others to determine whether an RCT should be considered sufficiently trustworthy to contribute to the evidence base that informs policy and practice. 相似文献
108.
L. E. Heeger;N. A. M. Houben;C. Caram-Deelder;S. F. Fustolo-Gunnink;J. G. van der Bom;E. Lopriore; 《Alcoholism & Drug Abuse Weekly》2024,64(8):1421-1427
Evidence supports a restrictive platelet transfusion threshold in preterm neonates. We aimed to describe the effect of implementing this threshold on transfusion rates. 相似文献
109.
Yağmur Uysal;Zeynep Görkem Doğaroğlu;Zehranur Çaylali;Delil Sefkan Karakulak; 《Global Challenges》2024,8(11):2400120
In this study, the impact of zinc oxide nanoparticles (ZnO-NPs) generated using rosemary extract, synthesized using environmentally friendly processes and integrated into a cross-linked polymer matrix, on growth performance of wheat is evaluated. Rosemary extract used as coating, stabilizing, and reducing agents in this green synthesis method. Fourier transform infrared spectroscopy analyses demonstrated the presence of phytochemical constituents of the plant extract that served as capping agents during the synthesis process. The nanoparticles are sprayed to the plant leaves. The effects of nanoparticles within the hydrogel on plant development are compared with the effects of nanoparticles in suspension. The percentage of seed germination is unaffected by either rosemary- or raw-ZnO-NPs; however, the root and shoot elongation are considerably impacted by the nanoparticle treatments. The threshold concentrations are determined as 3000 mg L−1 for rosemary-ZnO-NPs and 2000 mg L−1 for raw-ZnO-NPs. Additionally, antibacterial test results showed that the activity level on Escherichia coli is higher for rosemary-ZnO-NPs compared to raw-ZnO-NPs. The results of this research may provide guidance on how green synthesis methods and the use of nanoparticle-hydrogel composites in plant breeding can be used in future agricultural applications. This can be considered an important step in terms of agricultural innovations and sustainability. 相似文献
110.
Michael D. Orr;Brian G. Casleton;Olivia R. Garcia; 《Alcoholism & Drug Abuse Weekly》2024,64(10):1993-2000
The popularity of Low-Titer O Whole Blood (LTOWB) for treating trauma patients requires that donor centers and transfusion services make decisions on what titer testing capabilities to institute and an appropriate titer level threshold. This study compared the titer results determined by four methods to find a rate of agreement. 相似文献