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   10776篇
  免费   194篇
  国内免费   2篇
管理学   1496篇
民族学   63篇
人才学   3篇
人口学   967篇
丛书文集   70篇
理论方法论   1077篇
综合类   225篇
社会学   5486篇
统计学   1585篇
  2020年   152篇
  2019年   249篇
  2018年   261篇
  2017年   373篇
  2016年   263篇
  2015年   201篇
  2014年   255篇
  2013年   1741篇
  2012年   352篇
  2011年   338篇
  2010年   271篇
  2009年   261篇
  2008年   251篇
  2007年   291篇
  2006年   262篇
  2005年   264篇
  2004年   244篇
  2003年   178篇
  2002年   215篇
  2001年   274篇
  2000年   231篇
  1999年   210篇
  1998年   168篇
  1997年   157篇
  1996年   154篇
  1995年   144篇
  1994年   149篇
  1993年   149篇
  1992年   153篇
  1991年   148篇
  1990年   152篇
  1989年   147篇
  1988年   133篇
  1987年   148篇
  1986年   116篇
  1985年   147篇
  1984年   156篇
  1983年   141篇
  1982年   123篇
  1981年   89篇
  1980年   111篇
  1979年   113篇
  1978年   102篇
  1977年   86篇
  1976年   88篇
  1975年   99篇
  1974年   94篇
  1973年   69篇
  1972年   61篇
  1971年   53篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
This study used a nationally representative sample of middle and high school students to examine the degree to which economic, neighborhood, school, and family factors contributed to three points on a proposed school outcome continuum: (1)avoidance of problem behavior, (2)sense of school coherence, and (3)grades. Multilevel models were employed to account for the clustering of students inside schools. Results suggested that though family and neighborhood social factors contribute to variance in school outcomes, family and neighborhood economic factors revealed the largest potential to explain and therefore present leverage points to reduce race and ethnicity achievement gaps.  相似文献   
992.
Using mixed methods, we explored the role of coercive controlling behaviors in a high-risk sample of 126 men in violent same-sex relationships. Contrary to a prediction that separate factors of physical violence and coercive control might emerge, a simple principle components analysis supported that male same-sex relationship intimate partner violence (IPV) is essentially unidimensional. Qualitative narratives supported a single latent factor solution of violence, and that coercive controlling behaviors better detect IPV dynamics within the same violent encounters (i.e., weapon use), even when compared to profiles defined by physical violence. Narratives also highlighted gender-different tactics of coercion used, underscoring importance of context-based assessments.  相似文献   
993.
Although parenting behavior and friendship quality predict adolescent externalizing behaviors (EBs), individual differences in temperament may differentially affect susceptibility to these factors over time. In a multi‐method and multi‐informant study of 141 children followed prospectively from toddlerhood to adolescence, we tested the independent and interactive associations of age 3 reactive temperament (e.g., negative emotionality) and age 13 observed parenting (i.e., positive and negative behavior) and friendship (i.e., conflict and warmth), with multi‐informant ratings of age 15 aggression and rule‐breaking behavior. Negative parenting predicted growth in parent‐rated EB, but only for adolescents with early reactive temperament. Temperament did not affect sensitivity to positive parenting or friendship. Results are discussed in the context of differential susceptibility theory and intervention implications for adolescents.  相似文献   
994.
Recent changes in American media have resulted in direct impacts on the work of PR professionals, from newsroom reductions in traditional media outlets to the rise of social media. This study examines changes in the media relations dynamic with qualitative, in-depth interviews from 12 PR professionals in a medium, eastern U.S. city. Findings include PR professionals doing less traditional media relations, mostly attributable to downsized newsrooms, and frustration with the resulting dearth of institutional knowledge, influx of young, inexperienced reporters, and shallow stories. While participants see opportunities to inject unfiltered messages in media, overall they value reporter relationships and using social media in communication with them and in their job. Although new media are seen as one more task on an already very full PR plate, participants acknowledge their importance and growing relevance. Overall, PR professionals see their and the industry's future including both traditional and new media.  相似文献   
995.
Why are the important gender inequality issues different in various countries around the world? This question is answered using a comparative perspective on extant research about gender inequalities in the regions of the world. Just as there is diversity among individual women, based on their intersecting axes of age, race, ethnicity, class, marital status, sexual orientation, religion, or other characteristics, I argue that there is diversity across countries in their gender inequalities based on intersecting axes of transnational, regional, cross‐cutting, and unique national issues that structure gendered or feminist concerns within any country. Global and regional dynamics are the interrelated foundations on which broad gender inequalities are built. Major transnational dynamics include neoliberal economics, migration, and violence, while regional patterns include nation building and gendered inequalities in education and property ownership. On the other hand, unique national trajectories and cross‐cutting themes, found in a few nations in each region, add much greater variation to those basic inequalities. Some of those cross‐cutting themes are problems generated by health status and health services, the relationship of religion to the state, and war or militarism.  相似文献   
996.
In this article we explore the role of differentiation of self in facilitating forgiveness in the context of couple and family relationships. Differentiation is defined from the Bowen perspective as the ability to connect with others without being excessively emotionally reactive to the ebb and flow inherent in all significant relationships (being able to connect to others yet also being able to self‐regulate). Forgiveness is described as the releasing of an emotional injury via a complex psychological and relational process that is less an act of will than a discovery or possibility through understanding and empathy. Differentiation of self is related to emotional intelligence and empathy. The developmental and relational benefits of such are illustrated and discussed. A rationale for viewing differentiation and forgiveness in a contextual, historical, and relational attachment paradigm is suggested. Relevant clinical cases illustrate the dynamics of differentiation and forgiveness as discovery in the context of an understanding and empathic relational environment.  相似文献   
997.
The authors investigated the strategies that helped or hindered 10 immigrant women workers to do well with change that affected their work. A total of 182 incidents were extracted and grouped into 9 categories: personal beliefs/traits/ values, taking action, skills/education, personal challenges, self‐care, relationships/ support, government/community resources, work environment, and contextual challenges. Results support and extend contentions that both internal/personal and external factors are key successful adaptation to change for immigrant women. Implications for research and practice are discussed. Counseling recommendations are offered for individuals who are struggling with change.  相似文献   
998.
999.
Cities are highly modified environments in which the only areas that resemble natural landscapes are urban parks with low human population density. Attempts are frequently made to maintain high bird diversity in cities for aesthetic or educational reasons. However, it remains unclear whether local site characteristics are important in determining bird assemblage composition or whether simplification of the assemblage is an inevitable consequence of the changes associated with human population density. From May 1998 to December 1999, we undertook bird counts at 521 points in Porto Alegre, Rio Grande do Sul, southern Brazil. Our main goal was to understand the pattern of distribution of the bird species richness and density within the city and determine which variables most affect species assemblages. We recorded 132 species belonging to 43 families that are common in Rio Grande do Sul and obtained quantitative data on 121 species in survey sites. The two most abundant species (House Sparrow, Passer domesticus and Rock dove, Columba livia) were exotics. Analysis based on a reduced subset of 134 points surveyed in spring/early summer suggested that there was a North–south gradient in assemblage structure. Variation in assemblage structure was also affected by the number of trees, urban noise and human population density. However, human population density had a much smaller effect on richness and assemblage structure than variables subject to management, such as tree density and noise levels. These results suggest that complex communities may be maintained in densely populated urban areas of sub-tropical South-America given adequate urban planning.  相似文献   
1000.
Urban forests adjacent to interstate corridors are understudied ecosystems across cities. Despite their small area, these forests may be strategically located to provide large ecosystem services due to their ability to act as a barrier against air pollutants and noise as well as to provide flood control. The woody vegetation composition and structure of forests adjacent to urban interstates is an important determinant of their ability to provide these services. However, these forest communities may be particularly susceptible to the introduction of exotic invasive species via the interstate and the surrounding city that can potentially alter current and future forest composition. The purpose of this study was to investigate the distribution of native and exotic woody vegetation and tree regeneration in forests along three interstate corridors in Louisville, KY, and to determine potential factors (e.g., traffic density) that are correlated with patterns in the woody vegetation community. We found the most important determinants of vegetation composition along these interstate corridors were the distance from the city center and the presence of an exotic invasive shrub, Amur honeysuckle (Lonicera maackii). Compared with forested plots within 10 km of the city center, plots further from the city center had 81% lower stem density of Amur honeysuckle, 96% higher tree seedling regeneration, and 51% greater woody plant species richness. The primarily native species composition of adult trees in forests alongside urban interstates in Louisville and the regeneration of native tree species provide optimism that these forests can maintain native species while experiencing multiple impacts from the interstate as well as from the surrounding city, emphasizing their important potential for maintaining natural forest functions across the urban landscape.  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