全文获取类型
收费全文 | 1814篇 |
免费 | 59篇 |
专业分类
各国政治 | 151篇 |
工人农民 | 59篇 |
世界政治 | 93篇 |
外交国际关系 | 63篇 |
法律 | 1243篇 |
中国政治 | 9篇 |
政治理论 | 244篇 |
综合类 | 11篇 |
出版年
2020年 | 35篇 |
2019年 | 37篇 |
2018年 | 49篇 |
2017年 | 67篇 |
2016年 | 61篇 |
2015年 | 29篇 |
2014年 | 38篇 |
2013年 | 213篇 |
2012年 | 44篇 |
2011年 | 62篇 |
2010年 | 39篇 |
2009年 | 40篇 |
2008年 | 50篇 |
2007年 | 51篇 |
2006年 | 47篇 |
2005年 | 52篇 |
2004年 | 50篇 |
2003年 | 56篇 |
2002年 | 44篇 |
2001年 | 63篇 |
2000年 | 50篇 |
1999年 | 48篇 |
1998年 | 16篇 |
1997年 | 14篇 |
1996年 | 19篇 |
1995年 | 12篇 |
1994年 | 13篇 |
1993年 | 12篇 |
1992年 | 29篇 |
1991年 | 32篇 |
1990年 | 36篇 |
1989年 | 38篇 |
1988年 | 35篇 |
1987年 | 25篇 |
1986年 | 35篇 |
1985年 | 26篇 |
1984年 | 20篇 |
1983年 | 16篇 |
1982年 | 12篇 |
1981年 | 18篇 |
1980年 | 11篇 |
1979年 | 19篇 |
1978年 | 21篇 |
1977年 | 16篇 |
1973年 | 10篇 |
1971年 | 18篇 |
1970年 | 17篇 |
1969年 | 11篇 |
1968年 | 17篇 |
1967年 | 12篇 |
排序方式: 共有1873条查询结果,搜索用时 250 毫秒
31.
The photographic identification of a skull through the well-known superprojection technique can be modified and decisively improved by the use of a video-tape system. The identification method based on electronic photo composition is methodically simple to use. It offers the examiner the possibility to recognize the relationship between bone and soft part proportions, and the structure of the bone surface and the details of the soft part shape, as a concrete, tangible characteristic of identity to a substantially greater extent. The large number of controllable characteristics inherent in the ihgh degree of individuality of the skull offers not just an either/or "The skull fits"/ "It does not fit" into a photograph, but achieves proof of disproof of identity. 相似文献
32.
In the current debate on the future European order, the European Union (EU) is often described as an "emerging federation." This article claims that federalism is not exclusively useful in deliberating about the future of the EU. Non-statecentric conceptions of federalism provide a better understanding of the current structure and functioning of the European system of multilevel governance than most theories of European integration and international relations do. We combine political and economic perspectives of federalism to analyze the "balancing act" between effective political representation and efficient policy-making in the EU. Drawing on the examples of Germany and Switzerland in particular, we argue that the increasing delegation of powers to the central EU level needs to be paralleled by strengthened patterns of fiscal federalism and an empowered representation of functional interests at the European level. Without such "rebalancing," the current legitimacy problems of the EU are likely to intensify. 相似文献
33.
Tammy O Tengs Sajjad Ahmad Rebecca Moore Eric Gage 《Journal of policy analysis and management》2004,23(4):857-872
If manufacturing a safer cigarette is technically possible--an open question--then mandating that tobacco manufacturers improve the safety of cigarettes would likely have both positive and negative implications for the nation's health. On the one hand, removing toxins may reduce the incidence of smoking-related diseases and premature mortality in smokers. On the other hand, smokers might be less inclined to quit, those who have quit might resume the habit, and youth who have never smoked will have one less reason to avoid tobacco use. To assess the expected population health impacts of a legislative or regulatory mandate, we created the Tobacco Policy Model, a system dynamics computer simulation model. The model relies on secondary data and simulates the U.S. population over time spans as long as 50 years. Our simulation results reveal that even if requiring cigarettes to be safer makes smoking more attractive and increases tobacco use, a net gain in population health is still possible. 相似文献
34.
Erin O’Connor 《澳大利亚女权主义者研究》2018,33(98):530-547
ABSTRACTThis inquiry analyses the rhetoric of intentionally unfinished fashion contained in the collections from Céline as designed by Phoebe Philo and explicates the implications of this approach to fashion as a feminist text. Shoshana Felman’s seductive promise of speech, modified with insights from Paul de Man’s theory of autobiography as both giving face and defacement, is applied to Philo’s ‘new minimalism’ in order to highlight its appeal to modern female audiences. Using insights from the philosophy of Jacques Derrida, I examine ways in which wearers may seek to create a signature citationality via clothing that produces its own ‘unwriting’ therefore allowing the wearer to believe she inscribes her own iteration while maintaining control. Wearers are offered the chance to identify with a designer who is enlightened beyond fast and flashy fashion while hinting at the notion of the clothing having the substantialising effect that language has (instead of representational). Through this examination, clothing is shown to be a decision, and clothing is also shown to be a fiction. These decisions and fictions are open to failure; yet Felman offers that this failure acts as an opening remaining inadvertent or unacknowledged. Philo's designs invite an exploration of clothing as performative rhetoric. 相似文献
35.
Margaret O’Brien Caughy Luisa Franzini Michael Windle Patricia Dittus Paula Cuccaro Marc N. Elliott Mark A. Schuster 《Journal of youth and adolescence》2012,41(12):1613-1627
Despite evidence that neighborhoods confer both risk and resilience for youth development, the existing neighborhood research has a number of methodological limitations including lack of diversity in neighborhoods sampled and neighborhood characteristics assessed. The purpose of this study was to address these methodological limitations of existing research and to examine the relationship of neighborhood structural and social characteristics to family-level social processes and teacher-reported social competence during early adolescence. The study sample of 3,624 fifth graders (51?% girls) was ethnically diverse, including roughly even proportions of non-Hispanic White, non-Hispanic Black, and Hispanic youth. Neighborhood measures included economic disadvantage derived from the U.S. Census, physical and social disorder obtained by direct observation, and social capital from parental reports. Family-level social processes included parent reported family cohesion and youth reported maternal and paternal nurturance. We found that neighborhood factors significantly associated with youth social aggression and social competence but not social withdrawal, after controlling for individual demographic characteristics and parenting factors. There was limited evidence of moderation of family influences by neighborhood characteristics as well as the moderation of neighborhood effects by children’s gender. Neighborhood physical disorder was associated with increased social aggression among boys but with increased social withdrawal among girls. Implications of the study’s findings for research on neighborhoods and adolescent development and the development of preventive interventions are discussed. 相似文献
36.
Mark O’Brien 《社会福利与家庭法律杂志》2016,38(4):413-429
This paper reflects upon the gross discrepancies between the reassurances given in 2010 by the 2010-2015 UK Coalition Government that their budget and welfare cuts would fall ‘fairly’ across the income spectrum, and the reality of what had happened by the end of that government. It asks how the ‘distributional impact assessment’ provided with the 2010 Comprehensive Spending Review could have been so wrong. In seeking to answer this question, types of systematic bias are considered along with a discussion of ‘marginality’ in assessments of impact. Drawing upon the role of ‘power’ in impact assessment, it traces the ways in which methodological assumptions can eclipse the real life effects of policies behind ‘the average’ as well as by the unfair selection of the ‘unit-of-analysis’. 相似文献
37.
We compare several risk preference elicitation methods – including incentivised, non-incentivised, and framed methods as well as a traditional Likert survey question – in a developing country and empirically test how well consequent measures of risk attitudes predict risk taking behaviour. We find that Likert scale and non-incentivised framed survey questions are not sufficient substitutes for costlier incentivised methods in rural Niger. Instead, the incentivised framed question works best while a simplified incentivised lottery question works almost as well. More risk and ambiguity averse farmers are less likely to adopt fertiliser microdosing indicating the importance of insurance and strategies to promote learning. 相似文献
38.
39.
Roosa MW O'Donnell M Cham H Gonzales NA Zeiders KH Tein JY Knight GP Umaña-Taylor A 《Journal of youth and adolescence》2012,41(3):307-319
Mexican American youth are at greater risk of school failure than their peers. To identify factors that may contribute to
academic success in this population, this study examined the prospective relationships from 5th grade to 7th grade of family
(i.e., human capital [a parent with at least a high school education], residential stability, academically and occupationally
positive family role models, and family structure) and individual characteristics (i.e., externalizing symptoms, bilingualism,
gender, and immigrant status) to the academic performance of 749 Mexican American early adolescents (average age = 10.4 years
and 48.7% were girls in 5th grade) from economically and culturally diverse families as these youth made the transition to
junior high school. Results indicated that while controlling for prior academic performance, human capital and positive family
role models assessed when adolescents were in 5th grade positively related to academic performance in 7th grade. Further,
being a girl also was related to greater 7th grade academic success, whereas externalizing symptoms were negatively related
to 7th grade academic performance. No other variables in the model were significantly and prospectively related to 7th grade
academic performance. Implications for future research and interventions are discussed. 相似文献
40.