全文获取类型
收费全文 | 11575篇 |
免费 | 88篇 |
专业分类
各国政治 | 451篇 |
工人农民 | 1173篇 |
世界政治 | 484篇 |
外交国际关系 | 472篇 |
法律 | 6039篇 |
中国政治 | 15篇 |
政治理论 | 2987篇 |
综合类 | 42篇 |
出版年
2021年 | 13篇 |
2020年 | 48篇 |
2019年 | 50篇 |
2018年 | 1324篇 |
2017年 | 1256篇 |
2016年 | 1096篇 |
2015年 | 114篇 |
2014年 | 92篇 |
2013年 | 598篇 |
2012年 | 251篇 |
2011年 | 997篇 |
2010年 | 1078篇 |
2009年 | 656篇 |
2008年 | 822篇 |
2007年 | 789篇 |
2006年 | 100篇 |
2005年 | 154篇 |
2004年 | 265篇 |
2003年 | 244篇 |
2002年 | 178篇 |
2001年 | 82篇 |
2000年 | 82篇 |
1999年 | 84篇 |
1998年 | 73篇 |
1997年 | 88篇 |
1996年 | 76篇 |
1995年 | 73篇 |
1994年 | 61篇 |
1993年 | 50篇 |
1992年 | 54篇 |
1991年 | 59篇 |
1990年 | 42篇 |
1989年 | 54篇 |
1988年 | 44篇 |
1987年 | 43篇 |
1986年 | 55篇 |
1985年 | 47篇 |
1984年 | 39篇 |
1983年 | 62篇 |
1982年 | 47篇 |
1981年 | 32篇 |
1980年 | 28篇 |
1979年 | 30篇 |
1978年 | 31篇 |
1977年 | 31篇 |
1976年 | 26篇 |
1975年 | 19篇 |
1974年 | 28篇 |
1972年 | 13篇 |
1971年 | 14篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
891.
Michel Nakhla 《European Journal of Law and Economics》2016,42(3):445-469
Using an incomplete contract framework, we analyse new forms of regulation and private participation in public services. This paper explains contractual efficiency in the absence of financially guaranteed investments in public private partnerships. The example of a number of African countries underlines how a series of national, normative law reforms can give rise to innovations in approaches to regulation. This new hybrid form of regulation, inspired by a French regulation approach combining commission regulation and franchise bidding, could be more effective than previous approaches to regulation, in the sense of being more stable and more closely aligned with stakeholder expectations. This approach to regulation would appear to be more efficient economically, while integrating the objectives of solidarity tariffs and social water access connections. Based on these analyses, our results show (1) the impact on the robustness of new lease contracts on financing constraints, and (2) the advantages of Asset Owner Companies that reconcile explicit commitments and special purposes. We demonstrate that this achieves optimum efficiency by encouraging parties to determine jointly the optimal level of costs and investment. In addition, the mechanism fosters discussion about the possibility of institutionalizing Asset Owner Companies by predetermining the distribution of risk in lease contracts. 相似文献
892.
Tim Kalafut Simone Pugh Peter Gill Sarah Abbas Marie Semaan Issam Mansour James Curran Jo-Anne Bright Tacha Hicks Richard Wivell John Buckleton 《Journal of forensic sciences》2022,67(1):128-135
Semaan et al. (J Forensic Res, 2020, 11, 453) discuss a mock case “where eight different individuals [P1 through P8] could not be excluded in a mixed DNA analysis. Even though … expert DNA mixture analysis software was used.” Two of these are the true donors. The LRs reported are incorrect due to the incorrect entry of propositions into LRmix Studio. This forced the software to account for most of the alleles as drop-in, resulting in LRs 60–70 orders of magnitude larger than expected. P1, P2, P4, P5, and P8 can be manually excluded using peak heights. This has relevance when using LRmix which does not use peak heights. We extend the work using the same two reference genotypes who were the true contributors as Semaan et al. (J Forensic Res, 2020, 11, 453). We simulate three two-donor mixtures with peak heights using these two genotypes and analyze using STRmix?. For the simulated 1:1 mixture, one of the non-donors’ LRs supported him being a contributor when no conditioning was used. When considered in combination with any other potential donors (i.e., with conditioning), this non-donor was correctly eliminated. For the 3:1 mixture, all results correctly supported that the non-donors were not contributors. The low-template 4:1 mixture LRs with no conditioning showed support for all eight profiles as donors. However, the results from pair-wise conditioning showed that only the two ground truth donors had LRs supporting that they were contributors to the mixture. We recommend the use of peak heights and conditioning profiles, as this allows better sensitivity and specificity even when the persons share many alleles. 相似文献
893.
894.
Larry J. Nelson Laura M. Padilla-Walker Sarah Badger Carolyn McNamara Barry Jason S. Carroll Stephanie D. Madsen 《Journal of youth and adolescence》2008,37(5):605-615
Many studies have documented the ways in which shyness can be a barrier to personal well-being and social adjustment throughout
childhood and adolescence; however, less is known regarding shyness in emerging adulthood. Shyness as experienced during emerging
adulthood may continue to be a risk factor for successful development. The purpose of this study was to compare shy emerging
adults with their non-shy peers in (a) internalizing behaviors, (b) externalizing behaviors, and (c) close relationships.
Participants included 813 undergraduate students (500 women, 313 men) from a number of locations across the United States.
Results showed that relatively shy emerging adults, both men and women, had more internalizing problems (e.g., anxious, depressed,
low self-perceptions in multiple domains), engaged in fewer externalizing behaviors (e.g., less frequent drinking), and experienced
poorer relationship quality with parents, best friends, and romantic partners than did their non-shy peers.
Larry J. Nelson is an Associate Professor in the School of Family Life at Brigham Young University. He received his Ph.D. in 2000 from the University of Maryland, College Park. His major research interests are in social and self development during early childhood and emerging adulthood. Laura M. Padilla-Walker is an Assistant Professor in the School of Family Life at Brigham Young University. She received her Ph.D. in 2005 from the University of Nebraska—Lincoln. Her major research interests center on the parent-adolescent relationship as it relates to adolescents’ moral and prosocial behaviors and internalization of values. Sarah Badger received her Ph.D. in 2005 from Brigham Young University. Her major research interests are marriage formation and development as well as emerging adulthood and marriage readiness. Carolyn McNamara Barry is an Assistant Professor of Psychology at Loyola College in Maryland. She received her Ph.D. in 2001 from the University of Maryland, College Park. Her major research interests are in social and self development during adolescence and emerging adulthood. Jason S. Carroll is an Associate Professor in the School of Family Life at Brigham Young University. He received his Ph.D. in 2001 from the University of Minnesota. His major research interests are in marriage formation and development as well as emerging adulthood and marriage readiness. Stephanie D. Madsen is an Associate Professor of Psychology at McDaniel College. She received her Ph.D. in 2001 from the Institute of Child Development, University of Minnesota. She is particularly interested in how relationships with significant others impact child and adolescent development. 相似文献
Larry J. NelsonEmail: |
Larry J. Nelson is an Associate Professor in the School of Family Life at Brigham Young University. He received his Ph.D. in 2000 from the University of Maryland, College Park. His major research interests are in social and self development during early childhood and emerging adulthood. Laura M. Padilla-Walker is an Assistant Professor in the School of Family Life at Brigham Young University. She received her Ph.D. in 2005 from the University of Nebraska—Lincoln. Her major research interests center on the parent-adolescent relationship as it relates to adolescents’ moral and prosocial behaviors and internalization of values. Sarah Badger received her Ph.D. in 2005 from Brigham Young University. Her major research interests are marriage formation and development as well as emerging adulthood and marriage readiness. Carolyn McNamara Barry is an Assistant Professor of Psychology at Loyola College in Maryland. She received her Ph.D. in 2001 from the University of Maryland, College Park. Her major research interests are in social and self development during adolescence and emerging adulthood. Jason S. Carroll is an Associate Professor in the School of Family Life at Brigham Young University. He received his Ph.D. in 2001 from the University of Minnesota. His major research interests are in marriage formation and development as well as emerging adulthood and marriage readiness. Stephanie D. Madsen is an Associate Professor of Psychology at McDaniel College. She received her Ph.D. in 2001 from the Institute of Child Development, University of Minnesota. She is particularly interested in how relationships with significant others impact child and adolescent development. 相似文献
895.
John Kremers Whitmore 《East Asia》2012,29(1):15-23
In late 1972 (December 18-30), the Christmas Bombing of Hanoi in the Democratic Republic of Viet Nam by the U.S. Air Force
took place. Three weeks later, the American author arrived and witnessed the destruction and how the Vietnamese had already
fitted this 'Battle of the B-52s' into their centuries old narrative of resistance to foreign invasion. This article recounts
the people and situations that he met on this visit and the ways Vietnamese of all kinds viewed the battle as a great victory
for their land, one reinforcing their sense of past, present, and future. 相似文献
896.
897.
898.
899.
900.
Brenna Bhandar 《Law and Critique》2011,22(3):227-249
In this article the author traces the limits of the philosophy and politics of recognition as manifest in colonial settler
contexts. Forms of property ownership and ways of being, sutured by the racial body, are contained by a restricted economy
of owning, knowing and being. Bringing the concept of plasticity to bear on the relationship between the body, property and
the colonial, the author illuminates the ways in which practices of ownership that exceed the restricted economy of recognition
exhibit a temporal and spatial plasticity in the context of the Palestinian struggles over land in the West Bank. 相似文献