首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1716篇
  免费   70篇
各国政治   113篇
工人农民   126篇
世界政治   169篇
外交国际关系   83篇
法律   862篇
中国政治   12篇
政治理论   403篇
综合类   18篇
  2023年   18篇
  2022年   9篇
  2021年   14篇
  2020年   28篇
  2019年   53篇
  2018年   59篇
  2017年   56篇
  2016年   77篇
  2015年   40篇
  2014年   65篇
  2013年   257篇
  2012年   60篇
  2011年   55篇
  2010年   34篇
  2009年   51篇
  2008年   57篇
  2007年   61篇
  2006年   40篇
  2005年   52篇
  2004年   59篇
  2003年   45篇
  2002年   42篇
  2001年   52篇
  2000年   54篇
  1999年   29篇
  1998年   23篇
  1997年   22篇
  1996年   15篇
  1995年   12篇
  1994年   18篇
  1993年   16篇
  1992年   21篇
  1991年   30篇
  1990年   29篇
  1989年   21篇
  1988年   21篇
  1987年   18篇
  1986年   14篇
  1985年   18篇
  1984年   15篇
  1983年   14篇
  1982年   14篇
  1980年   8篇
  1979年   14篇
  1978年   6篇
  1976年   9篇
  1975年   6篇
  1974年   7篇
  1973年   9篇
  1972年   7篇
排序方式: 共有1786条查询结果,搜索用时 15 毫秒
961.
962.
963.
We investigate whether politicians whose family relatives previously served in parliament and cabinet enjoy a competitive “legacy advantage” in progressing from the backbenches to cabinet. This advantage may stem from two potential mechanisms: a direct effect attributable to the informational advantages of legacies or an indirect effect that operates through greater electoral strength. We evaluate the relative contribution of each mechanism using candidate‐level data from Irish parliamentary elections and cabinets from 1944 to 2016. Our results reveal that politicians with a family history in cabinet do enjoy an advantage in cabinet selection, and that this advantage cannot be attributed simply to greater electoral popularity. 1  相似文献   
964.
Pregabalin has become more widely prescribed and abused in recent years but is still not always included in laboratory analysis. An LC‐MS‐MS method has been developed and applied to measure pregabalin in 93 postmortem cases, including drug‐related deaths, alternative causes of death, and fatalities where pregabalin was likely to have contributed to death. Other drugs or alcohol was detected, and the most common drug types (in decreasing frequency) were antidepressants, opioids, benzodiazepines, opiates, alcohol, antipsychotics, cocaine, cardiac drugs, amphetamines, cannabis, anticonvulsants, and antihistamines. New psychoactive substances (methoxphenidine and synthetic cannabinoids) were only found in two cases. The results provide further data to assist in evaluating the significance of postmortem pregabalin concentrations and a toxicologically significant concentration of 25 mg/L is proposed. Pregabalin, especially with concomitant use of other CNS depressant drugs, presents a significant toxicological risk and existing laboratory protocols should be reviewed for their suitability to detect pregabalin.  相似文献   
965.
This article analyzes perceptions of inter-governmental fiscal relations as held by local officials of the Czech Republic. The field study probes local perceptions of progress toward fiscal decentralization in the Czech Republic. A statistical analysis is based on a scaling of cities according to size and according to a generalized, multi-part measure of fiscal autonomy. This measure is effective in discriminating high and low autonomy cities by size, types of expenditures, and funding sources. Cities of diverse sizes are divided into groups reflecting perceptions of greater or lesser autonomy. The implications of the findings are discussed.  相似文献   
966.
The goal of this paper was to examine and compare two different commercially available approaches to the determination of the relative quantities of autosomal and Y chromosomal DNA using real-time PCR. One, Quantifiler® Duo, utilizes a TaqMan® assay with single copy probes for both autosomal human and Y quantification. The other method, Plexor HY® utilizes a primer quenching assay with multi-copy probes for its quantification of autosomal human and Y chromosomal DNA. To test these approaches we have utilized the NIST Human DNA Quantitation Standard Reference Material 2372, a set of three different NIST human DNA quantification standards, to examine the precision, accuracy and sensitivity of the real-time PCR assays. We also examined data from both systems utilizing casework samples. The results show that both systems produced linear estimates for DNA quantity over a broad range of input DNA. However we did observe some apparent copy number effects when comparing the three different NIST standards which we attributed to issues with sequence variations in the different standards. Overall, the single copy approach provided better accuracy while the multi-copy approach produced better sensitivity. Thus the choice of which system to use should depend upon the goals of the user.  相似文献   
967.

Social justice is often described as the ‘foundation of public health.’ Yet, outside of the theoretical literature the polysemous nature of the concept is rarely acknowledged. To complement recent contributions to normative theory specifically motivated by questions of social justice in public health, this study explores public health policy-makers’ perspectives on the meaning and role of social justice in their practice. This study involved twenty qualitative, semi-structured interviews with public health policy-makers recruited from two programmatic areas of public health [chronic disease prevention (CDP) and public health emergency preparedness and response (PHEPR)] within public health organizations in Canada. Participants’ perspectives appeared to be influenced by the perceived goals belonging to the programmatic area of public health in which they practiced. Those involved in PHEPR indicated that justice-based considerations are viewed as a ‘constraint’ on the aims of this area of practice, which are to minimize overall morbidity and mortality, whereas those involved in CDP indicated that justice-based considerations are ‘part and parcel’ of their work, which seeks primarily to address the unique health needs of (and thus, disparities between) population groups. The aims and activities of different programmatic areas of public health may influence the way in which social justice is perceived in practice. More ought to be done (in theory and in practice) to interrogate how the unique contributions that individual programmatic areas of public health can and should cohere in order to realize the broader aim that public health has as an institution to promote social justice.

  相似文献   
968.
An estimated 15.5 million American children are exposed to intimate partner violence (IPV) every year. Such exposure negatively impacts children’s health, development and academic performance and may also be accompanied by housing instability or homelessness. Children growing up with periods of homelessness or housing instability are at risk for many of the same detrimental outcomes as children exposed to IPV. To date there are few studies examining the interrelationships among IPV, housing instability and the impact of housing interventions on children’s well-being. The current qualitative, longitudinal study examined mothers’ perceptions of how receipt of flexible funding designed to increase their housing stability may have also impacted their children’s safety, stress, mood and behavior. Forty-two mothers in the Washington, D.C. metro area were interviewed three times over a six-month period about their own safety and housing stability, as well as their children’s. Ninety-five percent of the mothers and their children were housed at the six-month interview. Mothers described improvements in children’s stability and safety, decreases in children’s stress levels, and improvements to their mood and behavior. They also discussed the symbiotic relationship between their own stress and well-being, and their children’s. The provision of flexible funding to assist domestic violence survivors with their housing also collaterally impacted their children’s safety, stress, mood and behavior.  相似文献   
969.
970.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号