全文获取类型
收费全文 | 19728篇 |
免费 | 510篇 |
专业分类
管理学 | 2415篇 |
民族学 | 110篇 |
人才学 | 6篇 |
人口学 | 1826篇 |
丛书文集 | 112篇 |
教育普及 | 2篇 |
理论方法论 | 1853篇 |
现状及发展 | 1篇 |
综合类 | 250篇 |
社会学 | 9853篇 |
统计学 | 3810篇 |
出版年
2023年 | 100篇 |
2022年 | 82篇 |
2021年 | 101篇 |
2020年 | 307篇 |
2019年 | 494篇 |
2018年 | 487篇 |
2017年 | 689篇 |
2016年 | 486篇 |
2015年 | 391篇 |
2014年 | 478篇 |
2013年 | 3338篇 |
2012年 | 713篇 |
2011年 | 613篇 |
2010年 | 502篇 |
2009年 | 467篇 |
2008年 | 542篇 |
2007年 | 534篇 |
2006年 | 499篇 |
2005年 | 458篇 |
2004年 | 455篇 |
2003年 | 422篇 |
2002年 | 423篇 |
2001年 | 501篇 |
2000年 | 410篇 |
1999年 | 409篇 |
1998年 | 336篇 |
1997年 | 306篇 |
1996年 | 301篇 |
1995年 | 292篇 |
1994年 | 279篇 |
1993年 | 258篇 |
1992年 | 299篇 |
1991年 | 300篇 |
1990年 | 272篇 |
1989年 | 264篇 |
1988年 | 265篇 |
1987年 | 241篇 |
1986年 | 232篇 |
1985年 | 259篇 |
1984年 | 250篇 |
1983年 | 245篇 |
1982年 | 186篇 |
1981年 | 172篇 |
1980年 | 185篇 |
1979年 | 181篇 |
1978年 | 151篇 |
1977年 | 145篇 |
1976年 | 129篇 |
1975年 | 123篇 |
1974年 | 102篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
William A. Mueller D.M.D. 《Child and Adolescent Social Work Journal》1993,10(5):395-401
Dental caries in children is now recognized as a preventable disease. The use of fluoride and sealants has produced a major reduction in caries prevalence among school aged children in the United States and other countries. A portion of the child population who are educationally and socioeconomically disadvantaged are not fully receiving these benefits. Public policy, insurance and medicaid groups must be made aware of these preventative measures and strategies developed to implement them. 相似文献
82.
Bruce A. Jacobs 《Symbolic Interaction》1992,15(4):435-453
Although research has examined the corruptive influences of undercover drug operations on agents (Girodo 1991 b; Manning and Reddlinger 1977, 1978), it has not examined the processes by which these influences can be neutralized. In this paper, I address these neutralization processes through a typology of routine and non-routine drug-use evasion tactics. Routine tactics involve excuses based on greed, business constraints, and role obligations (occupational, legal, and interpersonal). Nonroutine tactics involve two components: reverse accusation and simulation. Discussion focuses on excuses where I provide a dramaturgical interpretation that accentuates their deceptive and fraudulent nature, unlike traditional interpretations (e.g., Scott and Lyman 1968) which highlight their role as a reparative technique and aligning action (Margolin 1990). Data were drawn from ethnographic interviews with 35 light undercover narcotics agents located in a moderate-sized midwestern municipality. 相似文献
83.
In this paper we argue for the importance of a sociologically informed study of organizational accounting practices. By making the nexus between accounting and decision making problematic, instead of given, we move issues of interpretation and hierarchical control to the center stage of understanding the social construction of accounting practices. We suggest that inductive case studies of the organizational setting is a promising methodological strategy for identifying how accounting operates as an organizational control system. We focus on debates and proceedings of the board of directors as an overlooked source of data on decision making and organizational practices. We show how accounting practices are part of the strategic control system that functions to interpret the environment and direct the adaptation of the organization in a manner particular to the substantive rationality of corporate decision makers. We illustrate these contentions with a case study of accounting practice changes over a six year period. 相似文献
84.
This study investigated the gender-specific, self-reported sexual behaviors and attitudes of never-married college students attending a southeastern university in 1973 and 1988. Data were collected by means of a mailed questionnaire that remained essentially unchanged for both years. The authors found that both men and women reported an increase in heterosexual relationships that included sexual intercourse and a decrease in nonsexual relationships with the other gender. The majority of the students perceived themselves as adequately informed about sexuality and satisfied with their relationships, although the proportion of men who reported being satisfied with their relationships declined over the 15 years. The students indicated that sexuality education should focus primarily on information about AIDS and on preparation for marriage. 相似文献
85.
86.
Lee Friedman Edwin A. Fleishman Jennifer Mikulka Fletcher 《Journal of Engineering and Technology Management》1992,9(3-4)
This study attempted to identify the primary activities performed by R&D managers at different supervisory levels, and the cognitive and interpersonal ability requirements that underlie these activities. A task inventory containing 244 managerial tasks was completed by 117 R&D managers in nine organizations. The 48 tasks which managers rated as having spent the most time were factor analyzed, resulting in the identification of three primary activities: project management, personnel supervision, and strategic planning. Furthermore, these activities varied with supervisory level, with R&D managers performing a wider range of these activities with the progression from first-line to upper-level management.Thirty R&D managers later rated the degree to which 19 cognitive and interpersonal abilities were required for performing these primary activities. Strategic planning was rated as requiring significantly higher levels of oral expression, logical reasoning, originality, fluency of ideas, oral defense, and resistance to premature judgement than was required for the other two primary activities. Personnel supervision required a higher level of social sensitivity than was required for the other two activities. Project management required high levels of information ordering, oral fact- finding ability, problem sensitivity, and oral and written comprehension. Implications of the findings for understanding R&D managerial performance and personnel staffing functions are discussed. 相似文献
87.
Richard A. Wright 《The American Sociologist》1995,26(4):41-48
Much debate over the years has centered around whether there was ever a “golden past” for the introductory sociology textbook,
when high quality books influenced the development of scholarship and thinking. Some empirical evidence is added to this debate
through an analysis of the citations to introductory sociology textbooks in all the articles and research notes appearing
in theAmerican Journal of Sociology, theAmerican Sociological Review, andSocial Forces from 1960 to 1969 and from 1984 to 1993. The data show that, although seldom cited in recent journals, introductory sociology
textbooks were often cited in the earlier period. The article concludes with some thoughts about why introductory sociology
textbooks have had a declining influence on scholarship. 相似文献
88.
Charles W. Griffiths Chris Dockins Nicole Owens Nathalie B. Simon Daniel A. Axelrad 《Risk analysis》2002,22(4):679-688
To quantify the health benefits of environmental policies, economists generally require estimates of the reduced probability of illness or death. For policies that reduce exposure to carcinogenic substances, these estimates traditionally have been obtained through the linear extrapolation of experimental dose-response data to low-exposure scenarios as described in the U.S. Environmental Protection Agency's Guidelines for Carcinogen Risk Assessment (1986). In response to evolving scientific knowledge, EPA proposed revisions to the guidelines in 1996. Under the proposed revisions, dose-response relationships would not be estimated for carcinogens thought to exhibit nonlinear modes of action. Such a change in cancer-risk assessment methods and outputs will likely have serious consequences for how benefit-cost analyses of policies aimed at reducing cancer risks are conducted. Any tendency for reduced quantification of effects in environmental risk assessments, such as those contemplated in the revisions to EPA's cancer-risk assessment guidelines, impedes the ability of economic analysts to respond to increasing calls for benefit-cost analysis. This article examines the implications for benefit-cost analysis of carcinogenic exposures of the proposed changes to the 1986 Guidelines and proposes an approach for bounding dose-response relationships when no biologically based models are available. In spite of the more limited quantitative information provided in a carcinogen risk assessment under the proposed revisions to the guidelines, we argue that reasonable bounds on dose-response relationships can be estimated for low-level exposures to nonlinear carcinogens. This approach yields estimates of reduced illness for use in a benefit-cost analysis while incorporating evidence of nonlinearities in the dose-response relationship. As an illustration, the bounding approach is applied to the case of chloroform exposure. 相似文献
89.
Racial differences in urban neighboring 总被引:2,自引:0,他引:2
Despite mixed expectations generated by existing theories and evidence, this analysis documents clear racial differences in urban neighboring behavior. Using data from a survey of Nashville, Tennessee, residents, we show that blacks interact with their neighbors more often than whites do, and in a greater variety of ways. The only noteworthy similarity between the two groups is the positive impact of neighboring on feelings of community affect. Overall, our results support the view that neighbor relations — like other kinds of informal participation — have helped blacks cope with constrained social opportunities and provided them with access to resources unavailable through formal institutional channels.Revised version of a paper presented at the annual meeting of the American Sociological Association, San Francisco, August 1989. 相似文献
90.
Francis A. O’Connell 《Journal of Labor Research》1991,12(4):322-325
Readers wishing to correspond with Mr. O’Connell may do so through the editorial office of the Journal. 相似文献