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   99篇
  免费   5篇
各国政治   6篇
工人农民   12篇
世界政治   10篇
外交国际关系   5篇
法律   52篇
中国政治   3篇
政治理论   16篇
  2023年   2篇
  2021年   1篇
  2020年   1篇
  2019年   4篇
  2018年   5篇
  2017年   4篇
  2016年   4篇
  2015年   3篇
  2014年   3篇
  2013年   10篇
  2012年   6篇
  2011年   4篇
  2010年   4篇
  2009年   1篇
  2008年   3篇
  2007年   8篇
  2006年   4篇
  2005年   3篇
  2004年   4篇
  2003年   1篇
  2002年   1篇
  2001年   1篇
  2000年   1篇
  1999年   1篇
  1998年   3篇
  1997年   3篇
  1995年   1篇
  1993年   2篇
  1992年   2篇
  1991年   2篇
  1990年   1篇
  1988年   2篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1983年   1篇
  1982年   1篇
  1981年   1篇
  1980年   1篇
  1978年   1篇
  1972年   1篇
排序方式: 共有104条查询结果,搜索用时 31 毫秒
91.
The conventional wisdom about local TV news is that quality journalism does not sell and that only by focusing on crime, disasters, and other “soft news” can newscasts get good ratings. Political scientists have decried the poor quality of TV news as a betrayal of the press's mandate to inform citizens of the important policy issues of the day so that they can hold government officials accountable. This study tests the proposition that audiences prefer low effort, tabloid journalism by looking at external measures of commercial success—the Nielsen ratings data. Utilizing data from a 5‐year study matching the content quality of 33,911 local news stories from 154 TV stations in 50 TV markets nationwide to corresponding ratings success, we show that solid reporting and a focus on significant issues actually produce better ratings than slapdash or superficial tabloid journalism. Additionally, we find that strategy-oriented coverage of political campaigns that focuses on the horserace does not build an audience. These surprising results have practical implications for democratic practice and local TV news production.  相似文献   
92.
Legal driving limits are set coequally with 0.5 g/L blood alcohol concentration (BAC) or 0.25 mg/L breath alcohol concentration (BrAC) in Austria as well as in other European countries. As mostly some time elapses between BrAC measurement and driving offence, a back calculation of alcohol concentrations is often required. The calculation of hourly BrAC elimination rates can thereby help to avoid unnecessary variances. A study with 59 participants was performed under social conditions. BrAC was determined with the legally accredited Alcotest 7110 MK III A every 30 min, and concomitantly venous blood samples were drawn. Five hundred and four BrAC/BAC value pairs were evaluated. The overall mean peak BrAC was calculated with 0.456 mg/L (±0.119 mg/L standard deviation). The mean hourly BrAC elimination rate was overall determined with 0.082 mg/L per h (0.050–0.114, 95% range). Mean rate of females (0.087 mg/L h−1) and the according 95% limits were statistically significantly higher than of males (mean rate 0.078 mg/L h−1, p < 0.04). Our results confirm the possibility to implement hourly BrAC elimination rates, provided that adequate statistical ranges and basic forensic scientific rules that have been set up for alcohol back calculations are observed.  相似文献   
93.
Australians in Shanghai: Race, Rights and Nation in Treaty Port China . By Sophie Loy‐Wilson (London: Routledge, 2017), pp.164. £110.00 (hb).  相似文献   
94.
95.
96.
This paper presents a theoretical economic model assessing the effects of the level of mandatory genetically modified (GM) and non-GM coexistence regulations on market and welfare outcomes. We assume vertical differentiation of GM and non-GM goods on the consumer side. Producers of non-GM crops face a probability of having their harvest downgraded if gene flow from GM fields raises its content in genetically modified organisms (GMOs) above the labeling threshold. The government may impose on GMO producers mandatory ex ante isolation distances from non-GM fields in order to decrease the probability of non-GM harvest downgrading. It may also introduce an ex post compensation to non-GMO farmers for profit losses due to harvest downgrading, with a compensation fund financed by GMO producers and/or the state. Assuming endogenous crop choices and prices, we study the effects of ex ante regulation and ex post liability on four outcomes: market equilibrium, the achievement of coexistence, and both global and interest group welfare.  相似文献   
97.
Simulation-based training is often used to prepare health practitioners and is increasingly employed to train child welfare workers. This scoping review systematically searched the published and grey literature for studies that evaluated training for child welfare practitioners and used simulation methods that included standardized actors. Three studies met inclusion criteria, all documenting improvement in participants' use of specific skills. Other outcomes were mixed, possibly reflecting the heterogeneity of samples, study methods, measures, training of actors, theoretical frameworks, and content areas. Though results were mostly positive, the small number of studies indicates a substantial need for further research.  相似文献   
98.
The determination of line crossing sequences between rollerball pens and laser printers presents difficulties that may not be overcome using traditional techniques. This research aimed to study the potential of digital microscopy and 3-D laser profilometry to determine line crossing sequences between a toner and an aqueous ink line. Different paper types, rollerball pens, and writing pressure were tested. Correct opinions of the sequence were given for all case scenarios, using both techniques. When the toner was printed before the ink, a light reflection was observed in all crossing specimens, while this was never observed in the other sequence types. The 3-D laser profilometry, more time-consuming, presented the main advantage of providing quantitative results. The findings confirm the potential of the 3-D laser profilometry and demonstrate the efficiency of digital microscopy as a new technique for determining the sequence of line crossings involving rollerball pen ink and toner.  相似文献   
99.
Books in review     
the author of numberous works in U.S. Jewish history and culture. Her most recent book is The Wonders of America: Reinventing Jewish Culture, 1880–1950.  相似文献   
100.
Author Index     

Authors Index

Author Index  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