全文获取类型
收费全文 | 11168篇 |
免费 | 186篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1565篇 |
民族学 | 42篇 |
人才学 | 1篇 |
人口学 | 951篇 |
丛书文集 | 55篇 |
理论方法论 | 1023篇 |
综合类 | 154篇 |
社会学 | 5256篇 |
统计学 | 2309篇 |
出版年
2023年 | 67篇 |
2020年 | 151篇 |
2019年 | 224篇 |
2018年 | 233篇 |
2017年 | 334篇 |
2016年 | 250篇 |
2015年 | 204篇 |
2014年 | 245篇 |
2013年 | 2002篇 |
2012年 | 336篇 |
2011年 | 283篇 |
2010年 | 260篇 |
2009年 | 241篇 |
2008年 | 318篇 |
2007年 | 320篇 |
2006年 | 281篇 |
2005年 | 259篇 |
2004年 | 237篇 |
2003年 | 228篇 |
2002年 | 252篇 |
2001年 | 238篇 |
2000年 | 213篇 |
1999年 | 208篇 |
1998年 | 178篇 |
1997年 | 186篇 |
1996年 | 189篇 |
1995年 | 149篇 |
1994年 | 128篇 |
1993年 | 165篇 |
1992年 | 174篇 |
1991年 | 165篇 |
1990年 | 170篇 |
1989年 | 142篇 |
1988年 | 134篇 |
1987年 | 143篇 |
1986年 | 116篇 |
1985年 | 109篇 |
1984年 | 155篇 |
1983年 | 134篇 |
1982年 | 128篇 |
1981年 | 108篇 |
1980年 | 123篇 |
1979年 | 125篇 |
1978年 | 95篇 |
1977年 | 109篇 |
1976年 | 96篇 |
1975年 | 100篇 |
1974年 | 79篇 |
1973年 | 75篇 |
1972年 | 66篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Objectives: This study examines the relationships between information motivation behavioral skills model constructs and their associations with consistent condom use and condom use problems among young Black men. Methods: The authors use baseline data collected from 702 participants in a randomized controlled trial. Analyses involved path modeling and bootstrapped standard errors to estimate associations. Results: Motivation had the largest association with consistent condom use, whereas condom application skills had the largest association with condom use problems. Conclusion: Motivation is the most important predictor of consistent condom use, whereas condom application skills are the most important predictor of condom use problems. 相似文献
992.
By Richard L. Hannah 《International labour review / International Labour Office》2010,149(1):107-119
In response to fundamental market changes that are giving labour a much more central role in product market competition, employers often seek to extend their control over human capital beyond termination of the employment relationship. Although empirical studies are scarce, the use of restrictive post‐employment covenants is indeed believed to be widespread. But to what extent can employers lawfully restrict the freedom of their former employees? The author examines the criteria that courts in the United States have considered in balancing employers' legitimate economic interests against labour market efficiency and workers' post‐employment freedom and mobility. 相似文献
993.
994.
Douglas H. Sprenkle 《Journal of marital and family therapy》2010,36(3):270-281
Doctoral education is greatly impacted by context, and the large majority of marital and family therapy (MFT) doctoral programs are PhD programs in research-focused universities. I believe their primary mission is to equip students to become scientist–practitioners and do original research that will advance the science of the discipline, whereas the mission of the typical master’s program is to produce strong practitioners who are research informed. It is the emphasis on the scientific method, not the content specialty area, that should be the hallmark of PhD programs in research-focused contexts. I describe metrics for success that include not only research productivity but also the development of a supportive, open, flexible, and generous program culture. The research mission of these programs has been only modestly helped by the Commission on Accreditation for Marriage and Family Therapy Education process and the programs are largely not doing the programmatic intervention research that the field needs. As the universities that house these programs are also “raising the bar,” the long-term viability of the programs themselves will likely hinge on success in this arena. 相似文献
995.
Brad R. Fulton Richard L. Wood 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2018,29(5):1068-1079
As Tocqueville observed the emergence of democracy in the USA, he noted the central role religion played in undergirding democratic life. Nearly 200 years later, it is unclear whether religion continues to possess sufficient capacity to promote democratic engagement. This study links organizational theory with research on the structural and cultural characteristics of civil society organizations (CSOs) to assess the current impact of religion on democracy. It analyzes original data from a national study of politically oriented CSOs to determine whether drawing on structural characteristics of religious congregations and cultural elements of religion helps the organizations promote democratic engagement. The analysis finds a positive relationship between organizations that incorporate structural and cultural forms of religion and their organizing capacity, political access, and mobilizing capacity. These findings suggest that religion, mediated by congregations and religious culture, retains sufficient civic vitality to help politically oriented CSOs foster democratic engagement. 相似文献
996.
One medical specialty classification system applicable for research and career counseling is the person‐oriented versus technique‐oriented taxonomy. Given that the model was conceptualized in the 1960s, verification based on how medical specialties are practiced and viewed today is necessary. Five specialists in medical career development and advising verified the categorization of specialties. Based on their review, 100% consensus was reached regarding grouping of specialties. This outcome validates the taxonomy of medical specialties and supports its continued use for medical career specialty advising and choice. 相似文献
997.
Laura Brierton Granruth Peter A. Kindle Michael L. Burford Elena Delavega David H. Johnson Susan Peterson 《Journal of Social Work Education》2018,54(1):110-121
Understanding student political attitudes—feelings about government and perceptions of its role—has long been of interest to social scientists. One factor that may influence political attitudes is belief in a just world, a complex psychological construct well established in the literature. Our study explores changes in social work students’ perception of a supportive role of government and their beliefs in a just world after one policy course using a pretest and posttest design. Student perceptions changed toward a more supportive government role, but there was no significant change for belief in a just world. The study contributes to empirical evaluation of the social work education policy class in terms of the Council on Social Work Education competencies. 相似文献
998.
Amélie Desvars-Larrive Mario Baldi Theresa Walter Richard Zink Chris Walzer 《Urban Ecosystems》2018,21(5):951-964
Nowadays, the majority of human beings live in urban ecosystems, with this proportion expected to continue increasing in the future. With the growing importance of urban rat-associated issues (e.g. damages to urban infrastructures, costs of rat-control programs, rat-associated health risks), it is becoming indispensable to fill the identified gaps in knowledge on the urban brown rat regarding, among others, its density, home range, genetic structure, and infectious status. In this context, live-trapping is a crucial prerequisite to any scientific investigation. This paper assesses the main constraints and challenges regarding the urban field and describes the major steps to be considered when planning research on urban rats. The primary challenges are i) the characterization of the urban experimental unit; ii) the choice of a trapping design: the use of live-trapping in capture-mark-recapture design, in association with modern statistics, is highly recommended to answer ecological questions (although these methods, mostly developed in natural ecosystems, need to be implemented for the urban field); iii) the potential ethical considerations with regard to animal welfare and field-worker safety; iv) the building of mutually-beneficial collaborations with city stakeholders, pest control professionals, and citizens. Emphasis must be put on communication to the public and education of field-workers. One major need of modern urban rat research is a peer-validated field methodology allowing reproducibility, repeatability, and inference from urban field studies and enabling researchers to answer long-standing key questions about urban rat ecology. 相似文献
999.
High species diversity is argued to be the most important requisite for a resilient urban forest. In spite of this, there are many cities in the northern hemisphere that have very limited species diversity within their tree population. Consequently, there is an immense risk to urban canopy cover, if these over-used species succumb to serious pests or pathogens. Recognition of this should motivate the use of less commonly used species. Analysis of plant traits, such as the leaf water potential at turgor loss (ΨP0), can provide useful insights into a species’ capacity to grow in warm and dry urban environments. Therefore, the aim of this study was to evaluate ΨP0 of 45 tree species, the majority of which are rare in urban environments. To help evaluate the potential for using ΨP0 data to support future decision-making, a survey of professionals engaged with establishing trees in urban environments was also used to assess the relationship between the measured ΨP0 and the perceived drought tolerance of selected species. This study demonstrates that ΨP0 gives strong evidence for a species’ capacity to tolerate dry growing conditions and is a trait that varies substantially across species. Furthermore, ΨP0 was shown to closely relate to the experience of professionals involved in establishing trees in urban environments, thus providing evidence of its practical significance. Use of plant traits, such as ΨP0, should, therefore, give those specifying trees confidence to recommend non-traditional species for challenging urban environments. 相似文献
1000.
Urban Ecosystems - European hamster (Cricetus cricetus) holds the status of a strictly protected species with the necessity to be active protected. The decline in its population and limitations in... 相似文献