全文获取类型
收费全文 | 565篇 |
免费 | 21篇 |
专业分类
各国政治 | 36篇 |
工人农民 | 81篇 |
世界政治 | 38篇 |
外交国际关系 | 28篇 |
法律 | 278篇 |
中国政治 | 6篇 |
政治理论 | 115篇 |
综合类 | 4篇 |
出版年
2024年 | 2篇 |
2023年 | 5篇 |
2022年 | 7篇 |
2020年 | 12篇 |
2019年 | 7篇 |
2018年 | 15篇 |
2017年 | 18篇 |
2016年 | 27篇 |
2015年 | 12篇 |
2014年 | 11篇 |
2013年 | 83篇 |
2012年 | 17篇 |
2011年 | 18篇 |
2010年 | 16篇 |
2009年 | 16篇 |
2008年 | 17篇 |
2007年 | 23篇 |
2006年 | 19篇 |
2005年 | 15篇 |
2004年 | 23篇 |
2003年 | 17篇 |
2002年 | 10篇 |
2001年 | 10篇 |
2000年 | 10篇 |
1999年 | 12篇 |
1998年 | 11篇 |
1997年 | 10篇 |
1996年 | 9篇 |
1995年 | 7篇 |
1994年 | 12篇 |
1993年 | 12篇 |
1992年 | 11篇 |
1991年 | 12篇 |
1990年 | 14篇 |
1989年 | 5篇 |
1988年 | 10篇 |
1986年 | 2篇 |
1985年 | 8篇 |
1984年 | 6篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1980年 | 4篇 |
1979年 | 5篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1975年 | 5篇 |
1974年 | 1篇 |
1972年 | 2篇 |
1970年 | 1篇 |
排序方式: 共有586条查询结果,搜索用时 15 毫秒
471.
Experience with and management of stress has implications for adolescents' behavioral and socioemotional development. This study examined the relationship between adolescents' physiological response to an acute laboratory stressor (i.e., Trier Social Stress Test; TSST) and anger regulation and interpersonal competence in a sample of 175 low-income urban adolescents (51.8% girls). Findings suggested that heightened reactivity as indicated by cortisol, heart rate, and blood pressure was associated with increased interpersonal competence and anger regulation. However, these findings were context dependent such that, for youth high in self-reported child maltreatment, heightened reactivity was associated with decreased interpersonal competence and anger regulation. Results highlight the importance of considering how context may condition the effect of stress reactivity on functioning during adolescence. 相似文献
472.
Heather L. Ramey Michael A. Busseri Nishad Khanna Youth Net Hamilton Youth Net/Réseau Ado Ottawa Linda Rose-Krasnor 《Journal of youth and adolescence》2010,39(3):243-258
Suicide is a leading cause of death among adolescents in many industrialized countries. We report evidence from a mediation
model linking greater youth activity engagement, spanning behavioral and psychological components, with lower suicide risk
through five hypothesized intrapersonal and interpersonal mediating factors. Self-report survey data (15% French, 85% English)
were gathered from a community sample of 5,015 Canadian adolescents participating in a mental health promotion program. Youth
(M
age = 15.77, SD = 1.42, 50% female) were from two urban centers in southern Ontario, Canada. Youth engagement (youth’s most important
type of activity, frequency of involvement, and psychological engagement), suicide risk predictive factors (self-esteem, current
concerns, depressive symptoms, coping ability, and connections with others), and suicide risk (ideation and attempts) were
assessed. Consistent with the hypothesized mediation model, enjoyment and stress in youth’s most important activity and various
activity types were associated with the various hypothesized suicide risk predictive factors, which in turn were related to
suicide risk. Implications for conceptualizations of youth engagement as a multidimensional construct and for suicide risk
prevention efforts are discussed. 相似文献
473.
Stature Estimation Formulae for Nigerians 总被引:1,自引:0,他引:1
Blessing C. Didia M.D. ; Ethelbert C. Nduka Ph.D. ; Okechukwu Adele B.Sc. 《Journal of forensic sciences》2009,54(1):20-21
Abstract: In stature estimation, long limbs and the stature formula of Trotter and Gleser easily come to mind. In the recent past, a lot of workers have established formulae specific to their populations using whole length of limbs, fragmented bones, circumference of long bones, and even length of the vertebrae. We have in this work used tibia length, height of subjects, and the regression models to establish formulae specific to Nigerians. We measured height and tibia length of 200 (96 male and 104 female) adult Nigerians. The tibia length was measured from upper limit of the medial condoyle to the tip of medial malleolus using a measuring tape calibrated in meters while the height of individuals were also measured using meter scales. All measurements were made by one person, to avoid interobserver error, and repeatedly until a constant value is obtained. We obtained general formulae for males and females which compares favorably with that of Duyar and Pelin, and can be relied upon. 相似文献
474.
Joe H. Brown Linda Bledsoe Pamela Yankeelov Dana Christensen Noell L. Rowan Mary Lou Cambron 《Juvenile & family court journal》2009,60(2):49-67
This article describes a court‐community model program for high conflict divorced families that is designed to reduce the level of inter‐parental conflict including: a) child exposure to inter‐parental conflict; and b) the frequency of re‐litigation over residential arrangements and parenting plans. The six‐session (16‐hour) program combines conflict resolution and group/community support. The program provides a “Personal Support Team” and “Personal Plan of Action” to help each parent control emotions and maintain agreement. The results of research conducted to explore the effect of the program on level of triangulation and inter‐parental conflict, as well as the frequency of re‐litigation over parenting plans, residential arrangements, and parenting time are reported. 相似文献
475.
Debate about how to best interpret the Constitution often revolves around interpretive methodologies (e.g., originalism or
expansive interpretation). This article examines whether individuals’ political orientation influences the methodologies they
prefer to use to interpret the Constitution. We study this proposed relationship using a survey of federal law clerks and
an experimental study with college students. The survey results indicate that, compared to conservatives, liberal clerks prefer
the current meaning or the most plausible appealing meaning of the constitutional text, while conservatives prefer the original
meaning of the text. Liberal clerks also prefer to interpret the Constitution much more expansively. The second study manipulates
the policy implications of expansive interpretation and finds this manipulation differentially affects liberals’ and conservatives’
expansiveness preferences.
相似文献
Linda BabcockEmail: |
476.
477.
Linda Chelan Li 《公共行政管理与发展》2010,30(3):177-190
Central–local relations are a matter of great importance to developmentalists because they highlight an intriguing puzzle in public administration especially in large states: how policies decided at higher echelons of the formal system can possibly be implemented by the multitude of intermediary and local actors across the system. In the case of China—the most populous nation in the world, the contrast between the authoritarian façade of the Chinese regime and yet the proliferation of implementation gaps over many policy arenas adds additional complexity to the puzzle. This article reviews changes in central–local relations in the 60 years of history of People's Republic of China (PRC) as the outcome of four co‐evolving processes, and clarifies the roles of each process: state building and national integration, development efficiency, career advancement and external influences. It points out the continuous pre‐dominance of administrative decentralization from 1950s to present time, and the new emphasis on institutionalized power sharing in the context of new state‐market boundaries since 1980s. In conclusion, the article suggests going beyond the traditional reliance on the compliance model to understand central–local interactions and the abundant implementation gaps in a context of central–local co‐agency, thereby improving policy implementation. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
478.
Mark K. McBeth Elizabeth A. Shanahan Paul L. Hathaway Linda E. Tigert Lynette J. Sampson 《Policy Sciences》2010,43(4):391-409
Wicked policy problems—those that resist resolution and continuously cycle through different administrative jurisdictions—are
time-consuming for the practitioner and expensive. In these wicked policy environs, interest group narratives contribute to
this intractability through the continued construction of a policy loser’s tale. Central to our study is the analysis of group
maturation with that of policy narrative elements. We explore whether there is a relationship between lobby tactics, financial
resources, and professionalization of authorship of narratives and policy narrative elements. We content analyze the policy
stories of the Buffalo Field Campaign (BFC) over a 10-year period (1999–2008), using the Yellowstone National Park bison and
brucellosis controversy as case material and track how this new interest group’s fundamental policy story has changed over
the course of its lifespan. As demonstrated through their choice of lobby tactics, the group does evolve from an unconventional
to a conventional interest group, with two out of three of their constructed policy beliefs remaining unchanged and their
political tactics consistently focusing on spinning the loser’s tale aimed at expanding the policy arena. Suggestions on the
importance of this work to scientists, administrators, and academics are included. 相似文献
479.
The proliferation of adulterated health foods and beverages in the market demands a comprehensive analytical strategy to identify the adulterants, particularly those of isomeric phosphodiesterase 5 (PDE5) inhibitors. An instant coffee premix (ICP) purchased from an online retailer was flagged for suspected adulteration through PDE5 inhibition assay. The ICP was then analysed using suspected-target and non-targeted screenings of a liquid chromatography-quadrupole time-of-flight mass spectrometry. Based on these findings, a PDE5 inhibitor initially assigned as compound X was isolated from the ICP by employing a liquid chromatography-diode array detection before its structural elucidation with liquid chromatography-ultraviolet (LC-UV) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. The suspected-target screening matched the protonated molecule ([M + H]+) precursor ion of compound X at m/z 499.2310 with two suspected analytes that are structural isomers of one another. The fragmentation patterns of compound X were comparable to those analogues in the dithiocarbodenafil group through the non-targeted screening. These findings, complemented by the LC-UV and NMR spectroscopy data, together with the chromatographic separation of related structural isomers, conclude the identity of compound X. To our best knowledge, this is the first study to report the presence of 3,5-dimethylpiperazinyl-dithiodesmethylcarbodenafil in an ICP sample.
Key points
- The herbal-based male sexual performance products’ lucrative market has instigated their rampant adulteration, particularly with PDE5 inhibitors.
- The adulterated products may also contain analogues of the approved PDE5 inhibitors, which usually passed into the market undetected as they are not included in the routine targeted screening procedure.
- The present study detected, isolated, and identified an isomeric sildenafil analogue from an instant coffee premix sample using rapid qualitative assay and comprehensive analytical analysis.
- This paper highlighted the applicability of the established strategies for routine casework, particularly in a forensic drug testing laboratory.
480.