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   9020篇
  免费   148篇
  国内免费   1篇
管理学   1208篇
民族学   36篇
人才学   1篇
人口学   766篇
丛书文集   32篇
理论方法论   794篇
综合类   144篇
社会学   4154篇
统计学   2034篇
  2023年   56篇
  2020年   136篇
  2019年   191篇
  2018年   184篇
  2017年   300篇
  2016年   202篇
  2015年   175篇
  2014年   201篇
  2013年   1696篇
  2012年   264篇
  2011年   226篇
  2010年   207篇
  2009年   178篇
  2008年   255篇
  2007年   245篇
  2006年   205篇
  2005年   169篇
  2004年   153篇
  2003年   153篇
  2002年   159篇
  2001年   201篇
  2000年   182篇
  1999年   164篇
  1998年   144篇
  1997年   139篇
  1996年   136篇
  1995年   123篇
  1994年   96篇
  1993年   134篇
  1992年   153篇
  1991年   129篇
  1990年   139篇
  1989年   117篇
  1988年   116篇
  1987年   115篇
  1986年   109篇
  1985年   98篇
  1984年   122篇
  1983年   112篇
  1982年   98篇
  1981年   65篇
  1980年   97篇
  1979年   105篇
  1978年   76篇
  1977年   87篇
  1976年   78篇
  1975年   93篇
  1974年   72篇
  1973年   56篇
  1972年   61篇
排序方式: 共有9169条查询结果,搜索用时 9 毫秒
321.
Objectives. The purpose of this study was to extend research on the connection between school size and student outcomes by examining how school size was related to interpersonal processes and whether the interpersonal effects of school size varied by race/ethnicity. Methods. We applied multilevel modeling techniques to a sample of 14,966 students in 84 schools from the National Longitudinal Study of Adolescent Health. Results. Increasing school size was associated with decreasing student attachment to school and to teachers as well as extracurricular participation. Student attachment and teacher bonding diminished with increasing school size at a decreasing rate (reaching minimums in schools with between 1,700–2,000 students), but extracurricular participation dropped at a steady rate. These patterns did not differ substantially by race/ethnicity. Conclusions. The size of the educational institution influences interpersonal dynamics among actors in the institution and does so similarly across student groups. More generally, this research demonstrates the importance of organizational characteristics for social life.  相似文献   
322.
Peer nominations, a central method for measuring peer relationships in developmental research, typically involve asking children or adolescents to choose peers who fit various criteria from an alphabetized roster of classmates or grade‐mates. Although such measures have been used for decades, very little research has investigated the effects of alphabetical name order on the number of nominations received by peers. This study collected peer nominations for 20 items among 607 eighth grade participants in two schools. Regression analyses showed that earlier name order significantly predicted higher nomination counts for eight of the items, and explained over 5 percent of the variance in four affective variables (friendship, acceptance, acquaintanceship, and received liking). Across variables, name order effects were negatively correlated with internal reliability of nominations, implying that order effects may be related to the consensus of the peer group. Name order also had a minimal effect on inter‐correlations among a subset of variables. Implications and concrete recommendations for controlling and reducing name order effects in future research are discussed.  相似文献   
323.
This article reports the results of an evaluation of the effectiveness of different types of information materials in communicating the risk from exposure to radon, a naturally occurring indoor air pollutant. The study involved a panel of 2300 homeowners who actually experienced risks from radon, and the information program used to explain these risks. The analysis considered information transfer and performance on specific tasks requiring information on the risk from radon to measure learning. The results suggest a systematic learning process, but indicate that the process can be influenced by how risk information is presented.  相似文献   
324.
Objectives. We investigate the economic geographies of streets named for Reverend Dr. Martin Luther King, Jr. (MLK Streets), which are an increasingly common means by which various community members across the United States are attempting to commemorate the slain civil rights leader. It is our intent to characterize these negatively “branded” spaces in order to challenge some of the common perceptions about them and inform current and future MLK Street naming debates. Methods. We statistically analyze nonresidential establishments located on streets named for King in terms of scale (as measured by annual sales and employment) and industrial classification. To our knowledge, this is the first such analysis conducted at the national level. Results. Establishments located on MLK Streets do not systematically exhibit economic marginality. Establishments located on these streets do systematically exhibit unique local functions and industrial composition. Conclusion. In the absence of empirically‐driven research, the negative stereotypes that surround MLK Streets have gone unchallenged and are proliferating. The research reported here calls into question a number of these stereotypes and should inform the public, city councils, and other local policymakers, who are increasingly being faced with contentious MLK Street naming debates.  相似文献   
325.
A power/interaction model of interpersonal influence is applied to the analysis of religions as mechanisms of social control. The original six bases of power presented by French and Raven (1959)—coercion, reward, legitimate position, expert, referent, and informational—are expanded to include variants of these bases: personal reward and coercion and legitimacy of equity, reciprocity, and responsibility (Raven, 1992). Over centuries, certain sages, seers, and chieftains, feeling that they knew what was best for their people individually and collectively, have attempted to utilize these power resources (e.g., to counter tendencies toward murder, theft, adultery, mayhem, or harmful dietary practices). To implement power strategies, various preparatory devices were developed, which include the establishment of a Deity, whose ultimate reward and coercive power is enhanced by omnipotence; whose omnipresence establishes necessary continual surveillance; and whose ultimate expertise follows from omniscience. Much of what has been developed in holy works, and in supportive art and literature, can then be seen as further preparing the bases of power for social control. Tensions result when a populace that is educated to expect informational power is faced with a religion that emphasizes extreme coercion, reward, ultimate legitimate and expert power.  相似文献   
326.
327.
328.
Understanding the reliability of hazardous organizations and their protective systems is central to understanding the risk they produce. Work on “high reliability organization” has done much to illuminate the conditions in which social organization becomes reliable in highly demanding conditions. But risk depends just as much on how relying entities do their relying as it does on the reliability of the entities they rely on. Patterns of relying are often opaque in sociotechnical systems, and processes of relying and being relied on are mutually influencing in complex ways, so the relationship between relying and risk may not be at all obvious. This study was an attempt to study relying as a social practice, in particular analyzing how it had ecological validity in a social organization—how practice was responsive to the conditions in which it took place. This involved observational fieldwork and inductive, qualitative analysis on an offshore oil and gas production platform that was nearing the end of its design life and undergoing refurbishment. The analysis produced four main categories of ecological validity: responsiveness to formal organization, responsiveness to situational contingency, responsiveness to information asymmetry, and responsiveness to sociomateriality. This ecological validity of relying practice should be a primary focus of risk identification, assessing how relying can become mismatched to reliability in certain ways, both when relying practice is responsive to circumstances and when it is not.  相似文献   
329.
This article analyzes the available evidence to address airborne, aerosol transmission of the SARS-CoV-2. We review and present three lines of evidence: case reports of transmission for asymptomatic individuals in association with studies that show that normal breathing and talking produce predominantly small droplets of the size that are subject to aerosol transport; limited empirical data that have recorded aerosolized SARS-CoV-2 particles that remain suspended in the air for hours and are subject to transport over distances including outside of rooms and intrabuilding, and the broader literature that further supports the importance of aerosol transmission of infectious diseases. The weight of the available evidence warrants immediate attention to address the significance of aerosols and implications for public health protection.  相似文献   
330.
Those involved in sustainability debates on developmental pathways concur in the synergistic potential of integrating traditional ecological knowledge (TEK) and Western scientific approaches. Transhumant pastoralism is a livelihood strategy adapted to spatiotemporal environmental variability in many mountainous and arid regions worldwide. This form of livelihood is based on a mobile logic that is increasingly threatened by novel lifestyles promoted from a Western mind-set and by climate change. The aim of this article is to identify and characterize the different perspectives of environmental and social issues in a pastoral region and their association with labor collaboration among extension agents, framed in an institutional action. We tackled the inquiry about viewpoints with Q methodology and related it to regional problems, alternative solutions, and future development pathways for transhumant pastoralism and landscape management in northwest Patagonia. We identified six perspectives and characterized them with their topological position in the social network. Mediating positions registered the highest network centrality of labor collaborations among agents, whereas more dominant perspectives emphasizing TEK or scientific knowledge registered intermediate centrality. There was consensus on the need for sustainable developmental options, but the emphasis on combining knowledge still needs convergent solutions.  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