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   634篇
  免费   33篇
各国政治   20篇
工人农民   88篇
世界政治   60篇
外交国际关系   36篇
法律   283篇
中国政治   2篇
政治理论   175篇
综合类   3篇
  2023年   3篇
  2022年   4篇
  2021年   4篇
  2020年   12篇
  2019年   27篇
  2018年   22篇
  2017年   27篇
  2016年   25篇
  2015年   19篇
  2014年   29篇
  2013年   106篇
  2012年   21篇
  2011年   22篇
  2010年   23篇
  2009年   14篇
  2008年   17篇
  2007年   13篇
  2006年   20篇
  2005年   27篇
  2004年   20篇
  2003年   31篇
  2002年   22篇
  2001年   10篇
  2000年   11篇
  1999年   18篇
  1997年   10篇
  1996年   8篇
  1995年   4篇
  1994年   3篇
  1993年   7篇
  1992年   4篇
  1991年   3篇
  1987年   11篇
  1986年   4篇
  1985年   7篇
  1984年   2篇
  1983年   4篇
  1982年   3篇
  1981年   5篇
  1980年   3篇
  1979年   4篇
  1978年   2篇
  1977年   4篇
  1976年   4篇
  1975年   2篇
  1974年   3篇
  1972年   2篇
  1969年   3篇
  1968年   3篇
  1967年   3篇
排序方式: 共有667条查询结果,搜索用时 0 毫秒
661.
662.
663.
664.
The shipping industry is among the most globalized of all industries and is characterized by complex modular supply chains, including a largely outsourced labor force of “just‐in‐time” casualized workers from developing countries and the transitional East European states. Despite long‐standing efforts by international bodies to standardize and regulate the education and training of seafarers, variations in practices and standards persist. Employers exercise contradictory influences on education and training providers, on the one hand demanding the urgent provision of more recruits (encouraging corner‐cutting), and on the other complaining about the poor quality of recruits received (urging crackdowns on poor quality providers and more rigorous examinations) – the training double bind. This paper reflects on these issues through the study of the problematic use of computerized assessments in seafarer examinations, drawing upon findings from a study involving research in six different case study countries providing maritime labor and interviews with stakeholders.  相似文献   
665.
For all governments, the principle of how and whether policies are implemented as intended is fundamental. The aim of this paper is to examine the difficulties for governments in delivering policy goals when they do not directly control the processes of implementation. This paper examines two case studies – anti-social behaviour and street crime – and demonstrates the difficulties faced by policy-makers in translating policy into practice when the policy problems are complex and implementation involves many actors.  相似文献   
666.
North American scholarship has charted resonances between 1990s legislative and feminist discourse concerning violence against women. Feminist critique of official discourse surrounding the Protection from Harassment Act 1997 suggests that 1990s resonances did not reach the UK: however, an examination of the Hansard debates suggests this under-estimates the influence of feminist discourse. Halley’s discussion of “bad faith” helps to explain both the tendency of feminists to under-estimate their influence and why this matters. A commitment to an understanding of themselves as powerless may encourage feminists to underplay similarities between feminist and official discourse, leading feminists to find only what they expect. Such an understanding gives feminism the capacity to change social life without acknowledging, let alone agonising over, the full range of its distributive effects. This is most troubling in relation to “carceral” feminism, since under-assessment of feminist impact encourages amplification and intensification of the carceral message.  相似文献   
667.
Abstract: Low concentrations of microbial pathogens in pure and mixed samples were detected using a bead‐based, liquid array technology. A 20‐bp sequence in the 23S rRNA gene, rrl, was amplified in four microorganisms: Bacillus cereus, Escherichia coli, Salmonella enterica and Staphylococcus aureus. PCR products were positively identified with the Luminex® 100? system. The system could detect very low amounts of DNA and the instrument response was proportional to the input concentration. The lower limit of detection (LLD) was determined to be 0.5 ng for B. cereus and E. coli and 2 ng for S. enterica. The LLD for S. aureus was not determined as the instrument response was still above the threshold when quantities of DNA as low as 0.25 ng were used. The platform positively identified organisms present in mixed samples even when the minor component was overshadowed by a 10‐fold excess of the major component.  相似文献   
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