首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   727篇
  免费   51篇
管理学   52篇
民族学   9篇
人才学   3篇
人口学   64篇
丛书文集   6篇
理论方法论   99篇
综合类   4篇
社会学   515篇
统计学   26篇
  2023年   16篇
  2022年   3篇
  2021年   9篇
  2020年   35篇
  2019年   60篇
  2018年   68篇
  2017年   70篇
  2016年   45篇
  2015年   40篇
  2014年   39篇
  2013年   131篇
  2012年   36篇
  2011年   37篇
  2010年   26篇
  2009年   15篇
  2008年   17篇
  2007年   22篇
  2006年   11篇
  2005年   8篇
  2004年   17篇
  2003年   12篇
  2002年   8篇
  2001年   3篇
  2000年   8篇
  1999年   3篇
  1998年   2篇
  1997年   5篇
  1996年   6篇
  1995年   3篇
  1994年   1篇
  1992年   5篇
  1989年   1篇
  1988年   3篇
  1987年   2篇
  1986年   1篇
  1985年   1篇
  1983年   2篇
  1982年   2篇
  1978年   2篇
  1974年   1篇
  1973年   1篇
  1971年   1篇
排序方式: 共有778条查询结果,搜索用时 31 毫秒
51.
Psychosocial factors, individual factors, workplace requirements, and workplace organizational factors have all been reported as being associated with the risk of musculoskeletal disorders [11]. Huang, Feuerstein, and Sauter [5] described the various concepts and models proposed to link occupational stress and work-related upper extremity disorders, as well as the difficulty in verifying the suggested linkages. Huang et al. [5] suggested that decomposing a complex model would be an appropriate method to begin the investigations of the proposed models. Task repetition is a workplace requirement that is considered a potential risk factor for cumulative trauma and its relationship to psychosocial factors was investigated. The study found only weak to no statistically significant relationship between task repetition and reported psychosocial factors of job stress in workers in Taiwan.  相似文献   
52.
In semi-arid cities, urban trees are often irrigated, but may also utilize natural water sources such as groundwater. Consequently, the sources of water for urban tree transpiration may be uncertain, complicating efforts to efficiently manage water resources. We used a novel approach based on stable isotopes to determine tree water sources in the Los Angeles basin, where we hypothesized that trees would rely on irrigation water in the soil rather than develop deep roots to tap into groundwater. We evaluated the oxygen (δ18O) and hydrogen (δD) isotope ratios of xylem water, irrigation water, soil water, and groundwater in a study of temporal patterns in water sources at two urban sites, and a study of spatial patterns at nine urban sites and one “natural” riparian forest. Contrary to our hypothesis, we found that despite frequent irrigation, some trees tap into groundwater, although in most species this was a small water source. Some trees appeared to be using very shallow soil water at <30 cm depth, suggesting that these mature urban trees were quite shallowly rooted. In the natural site, trees appeared to be using urban runoff in addition to shallow soil water. We were able to identify tree uptake of precipitation at only 3 sites. The results show that some irrigated trees utilize groundwater and do not rely solely on irrigation water, which may make them able to withstand drought and/or water conservation measures. However, some irrigated trees may develop very shallow root systems, which may make them more susceptible.  相似文献   
53.
Linguistic stress and sequential statistical cues to word boundaries interact during speech segmentation in infancy. However, little is known about how the different acoustic components of stress constrain statistical learning. The current studies were designed to investigate whether intensity and duration each function independently as cues to initial prominence (trochaic‐based hypothesis) or whether, as predicted by the Iambic‐Trochaic Law (ITL), intensity and duration have characteristic and separable effects on rhythmic grouping (ITL‐based hypothesis) in a statistical learning task. Infants were familiarized with an artificial language (Experiments 1 and 3) or a tone stream (Experiment 2) in which there was an alternation in either intensity or duration. In addition to potential acoustic cues, the familiarization sequences also contained statistical cues to word boundaries. In speech (Experiment 1) and nonspeech (Experiment 2) conditions, 9‐month‐old infants demonstrated discrimination patterns consistent with an ITL‐based hypothesis: intensity signaled initial prominence and duration signaled final prominence. The results of Experiment 3, in which 6.5‐month‐old infants were familiarized with the speech streams from Experiment 1, suggest that there is a developmental change in infants’ willingness to treat increased duration as a cue to word offsets in fluent speech. Infants’ perceptual systems interact with linguistic experience to constrain how infants learn from their auditory environment.  相似文献   
54.
55.
56.
Case management services for low-income couples receiving relationship education have been required by federal funding agencies. Studies examining relationship education outcomes for low-income couples have yet to address participant characteristics of those who attend case management services (e.g., distressed vs. nondistressed). Thus, this study examined the influence of baseline relationship satisfaction and demographics on attendance at case management visits for 2,628 low-income, partnered participants who attended relationship education. Findings indicated that participants who reported higher baseline relationship distress attended more family services counselor (FSC) visits. However, when we added demographics to the model, relationship distress no longer predicted FSC visits, whereas income served as a predictor for men and women, with those reporting greater monthly income attending more FSC visits.  相似文献   
57.
ABSTRACT

This study aimed to provide a national profile of homebound and semi-homebound older adults with depressive symptoms and to compare risk factors of depressive symptoms by homebound status. A sample of 1,885 homebound and semi-homebound older adults was selected from Round 1 of the National Health and Aging Trends Study (NHATS). The prevalence of depressive symptoms was 43.9% in homebound older adults and 28.1% in semi-homebound older adults, representing over 830,000 and 1.4 million individuals in the population, respectively. Nearly two-thirds of homebound and over half of semi-homebound older adults with clinically significant depressive symptoms also had significant anxiety symptoms. Results from logistic regression showed that younger age, certain medical morbidities, severity of functional limitations, and pain were common risk factors for depressive symptoms among homebound and semi-homebound older adults. Some differences in the risk factor profile emerged between the homebound and the semi-homebound populations. Alleviating the burden of depression in the semi-homebound population may focus on early prevention that considers the diversity of this population. Home-based, integrated programs of health and mental health services that simultaneously address the medical, psychiatric, and neurologic comorbidities and disabilities of homebound older adults are needed to meet the complex needs of this population.  相似文献   
58.
This study examines the perceptions of mental illness identity among a group of emerging adults based on their retrospective experiences with diagnoses and psychotropic medication use during their earlier formative adolescent years. A short questionnaire was administered via online social media platforms to volunteers between the ages of 19 and 30 and who self-identified as having taken psychotropic medication between the ages of 12 and 18 (N = 46). Correlation analysis revealed that several variables were associated with a stronger illness identity, including participant’s happiness with their medication experiences, the belief that medication made them more like their “true” selves, and the belief that their diagnosis was accurate. Content analysis of participant narratives suggested themes related to discontinuation and barriers to adherence. These results contribute to the growing knowledge base around lived experiences of psychiatric medication use and suggest further study on how to advance more informed and compassionate mental health care.  相似文献   
59.
ABSTRACT

The experiences, including with environmental microaggressions, and well-being of trans* collegians remain an under-researched topic. In this mixed-methods study of a survey sample of 152 trans* collegians, multivariable regression findings suggest that the frequency of experiencing select trans* environmental microaggressions (e.g., not having access to comfortable bathrooms as a trans* person) are associated with increased risk for poorer academic outcomes (e.g., developmental challenges) but are not associated with mental health outcomes. Furthermore, interviews with 18 trans* collegians suggest that students face several systemic microaggressions, including difficulties advancing trans* inclusion. Various reactions, including paths of resistance, were identified. Implications are discussed.  相似文献   
60.
Creating a normative campus environment intolerant to sexual violence is important for prevention. While prevention initiatives focusing on students are vital, faculty and staff have a central role in supporting and sustaining a comprehensive strategy for preventing campus sexual violence. Nationwide, colleges and universities recently implemented campus climate surveys. At Emory, we decided to survey faculty and staff as well as students, motivated by our use of an ecological framing of campus sexual violence. Faculty and staff are long-term members of the community, and can provide stability and continuity that reinforces prevention efforts prioritized for students. We recommend that schools use a trauma-informed approach to guide the involvement of faculty and staff in prevention. We encourage colleges and universities to consider the experiences and needs of their faculty and staff, as professionals who serve as leaders on campus and as those who guide students through their academic experiences.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号