全文获取类型
收费全文 | 2344篇 |
免费 | 87篇 |
专业分类
管理学 | 299篇 |
民族学 | 12篇 |
人才学 | 1篇 |
人口学 | 157篇 |
丛书文集 | 8篇 |
理论方法论 | 231篇 |
综合类 | 14篇 |
社会学 | 1349篇 |
统计学 | 360篇 |
出版年
2023年 | 17篇 |
2021年 | 16篇 |
2020年 | 35篇 |
2019年 | 56篇 |
2018年 | 50篇 |
2017年 | 75篇 |
2016年 | 64篇 |
2015年 | 62篇 |
2014年 | 74篇 |
2013年 | 440篇 |
2012年 | 77篇 |
2011年 | 81篇 |
2010年 | 61篇 |
2009年 | 56篇 |
2008年 | 65篇 |
2007年 | 75篇 |
2006年 | 87篇 |
2005年 | 74篇 |
2004年 | 62篇 |
2003年 | 76篇 |
2002年 | 63篇 |
2001年 | 47篇 |
2000年 | 53篇 |
1999年 | 50篇 |
1998年 | 33篇 |
1997年 | 33篇 |
1996年 | 17篇 |
1995年 | 29篇 |
1994年 | 39篇 |
1993年 | 25篇 |
1992年 | 33篇 |
1991年 | 20篇 |
1990年 | 33篇 |
1989年 | 23篇 |
1988年 | 20篇 |
1987年 | 22篇 |
1986年 | 24篇 |
1985年 | 23篇 |
1984年 | 22篇 |
1983年 | 28篇 |
1982年 | 17篇 |
1981年 | 23篇 |
1980年 | 15篇 |
1979年 | 15篇 |
1978年 | 23篇 |
1977年 | 15篇 |
1976年 | 12篇 |
1975年 | 9篇 |
1974年 | 11篇 |
1973年 | 10篇 |
排序方式: 共有2431条查询结果,搜索用时 843 毫秒
71.
Prior literature indicates that although the sales function of an organization is a critical element for its success, there is a lack of research on specific actions managers can take to influence sales subordinates. The purpose of the present study was to assess the effects of a coaching package combined with incentives on sales performance for telemarketing personnel in an organizational setting. Following the implementation of the coaching package, there was a substantial increase in critical behaviors performed, pending sales set, and final sales completed by all telemarketers. 相似文献
72.
Urban environments are often associated with reduced biodiversity, presumably because they are typically more fragmented, warmer, and drier than nearby non-urban environments. However, urban landscapes offer significant complexity that have allowed some taxonomic groups to flourish. Understanding how urban-exploiting animals navigate this spatiotemporal heterogeneity is important given the continued global urban land expansion. Here, we examined the factors influencing resource-use in an urban community of ants, which represent a widespread and important taxon in urban ecosystems. In particular, we sought to integrate ants’ nutritional, thermal, and spatial niches to better understand how urban animals successfully access critical resources throughout their active season. Meteorological season (spring, summer, and fall) and/or species (n?=?9) influenced ants’ preferences for nutrition (ratio of ingested protein-to-carbohydrate ratio), as well as the temperature, type (impervious vs. non-impervious), and shade status (shaded vs. non-shaded) of surfaces used during activity. Our data also indicate links among habitat variables, as well as between nutritional preferences and habitat use. Together, our results suggest that species and seasonality influence ecological (combined nutritional, thermal, and spatial) niches in an urban community. We encourage future work in urban ecosystems that continues to integrate more features of the ecological niche, and to examine the outcomes of variation in niches (e.g., non-overlapping niches may explain both the persistence of some native animals and the success of invaders). 相似文献
73.
Harvey J. Krahn Cher-Ann Chai Shichen Fang Nancy L. Galambos Matthew D. Johnson 《Journal of youth studies》2018,21(7):905-921
The transition from youth to adulthood in western societies has become more prolonged and complex as traditional societal norms have lost influence. Using retrospective data from a cohort of 43-year-old Canadians surveyed in 2010 (n?=?405), we mapped the timing, sequencing, and duration of ‘first stage’ youth-adult transitions (leaving home, finishing formal education, obtaining a full-time job) and ‘second stage’ youth-adult transitions (marriage, parenthood, home ownership). Latent profile analysis identified five distinct transition profiles – norm-setters, quick adults, uncertain adults, adult students, and delayed adults – with different amounts and timing of post-secondary educational investment playing an important profile-shaping role. Although youth-adult transitions have become less standardized and more individualized, especially for first stage transitions, these transitions are still quite structured and continue to be affected by gender and family socioeconomic status. 相似文献
74.
Emily E. Wheeler Sharon G. Horne Meredith Maroney Teresa Johnson 《Journal of GLBT Family Studies》2018,14(3):196-212
Despite increased access to parenting rights through legal marriage and adoption, U.S. gay, lesbian, bisexual, transgender, and queer (GLBTQ) parents continue to experience varying levels of support for their families. This study explored protective strategies, or actions taken to meet one's safety needs when vulnerable, that GLBTQ parents pursue. This study included 454 GLBTQ parents from a national survey. Participants' open-ended responses about protective strategies were extracted from the survey and analyzed using content analysis. Responses were coded into 10 categories capturing strategies GLBTQ parents used to protect their families. While strategies utilizing legal supports were common, the most cited strategies were symbolic strategies, including creating a family name and developing written statements of parent wishes. Exploratory analyses revealed no difference in mean number of strategies used between parents who reported having legal status as a parent through adoption or listing on the birth certificate and those without legal parenting status. These results suggest that GLBTQ parents, regardless of their legal parenting status, take intentional measures to achieve a sense of safety and increase social support. The findings reiterate the importance of both legal and social support of GLBTQ parents. 相似文献
75.
76.
77.
Research highlights lasting cognitive and academic challenges in youth internationally adopted from institutional care. However, there is a lack of research examining internationally adopted students' sense of membership at school and associated academic and psychological outcomes. The current study measured sense of school membership and academic and psychological outcomes in post-institutionalized internationally adopted high school students (n = 29) compared to adolescents internationally adopted from foster care (n = 28) and non-adopted adolescents (n = 32). Post-institutionalized males had a lower sense of school membership than males adopted from foster care or non-adopted males. Group differences in school membership were mediated by academic achievement and psychological well-being. 相似文献
78.
79.
Jochen Klenk Lars Schwickert Luca Palmerini Sabato Mellone Alan Bourke Espen A. F. Ihlen Ngaire Kerse Klaus Hauer Mirjam Pijnappels Matthis Synofzik Karin Srulijes Walter Maetzler Jorunn L. Helbostad Wiebren Zijlstra Kamiar Aminian Christopher Todd Lorenzo Chiari Clemens Becker for the FARSEEING Consortium 《European review of aging and physical activity》2016,13(1):8
Background
Real-world fall events objectively measured by body-worn sensors can improve the understanding of fall events in older people. However, these events are rare and hence challenging to capture. Therefore, the FARSEEING (FAll Repository for the design of Smart and sElf-adaptive Environments prolonging Independent livinG) consortium and associated partners started to build up a meta-database of real-world falls.Results
Between January 2012 and December 2015 more than 300 real-world fall events have been recorded. This is currently the largest collection of real-world fall data recorded with inertial sensors. A signal processing and fall verification procedure has been developed and applied to the data. Since the end of 2015, 208 verified real-world fall events are available for analyses. The fall events have been recorded within several studies, with different methods, and in different populations. All sensor signals include at least accelerometer measurements and 58 % additionally include gyroscope and magnetometer measurements. The collection of data is ongoing and open to further partners contributing with fall signals. The FARSEEING consortium also aims to share the collected real-world falls data with other researchers on request.Conclusions
The FARSEEING meta-database will help to improve the understanding of falls and enable new approaches in fall risk assessment, fall prevention, and fall detection in both aging and disease.80.
Kenneth M. Johnson 《Population and development review》2020,46(1):7-31
This research is the first to examine the prevalence and dynamics of non-Hispanic white natural decrease in fine scale subregional units of the United States. In 2015, more non-Hispanic Whites died than were born in 65 percent of the US counties. This is the highest incidence of non-Hispanic white natural decrease ever reported. It results from a complex interaction among fertility, mortality, and migration over a protracted period. Spatial regression is used to identify three critical variables (over-65 population, child–women ratio, and women of childbearing age) that are the immediate demographic causes of this natural decrease. The timely, factual information in this paper provides a demographic context for analysis of the social, political, and policy implications of this emergent demographic phenomenon. 相似文献