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   897篇
  免费   51篇
各国政治   90篇
工人农民   58篇
世界政治   81篇
外交国际关系   51篇
法律   425篇
中国政治   7篇
政治理论   228篇
综合类   8篇
  2023年   5篇
  2020年   22篇
  2019年   26篇
  2018年   26篇
  2017年   33篇
  2016年   27篇
  2015年   24篇
  2014年   24篇
  2013年   126篇
  2012年   25篇
  2011年   31篇
  2010年   16篇
  2009年   23篇
  2008年   27篇
  2007年   20篇
  2006年   22篇
  2005年   28篇
  2004年   28篇
  2003年   22篇
  2002年   22篇
  2001年   25篇
  2000年   23篇
  1999年   23篇
  1998年   18篇
  1997年   11篇
  1996年   11篇
  1995年   12篇
  1994年   17篇
  1993年   13篇
  1992年   15篇
  1991年   18篇
  1990年   11篇
  1989年   16篇
  1988年   9篇
  1987年   15篇
  1986年   10篇
  1985年   11篇
  1984年   16篇
  1983年   6篇
  1982年   8篇
  1981年   10篇
  1980年   10篇
  1979年   5篇
  1978年   5篇
  1977年   5篇
  1976年   6篇
  1975年   4篇
  1974年   8篇
  1969年   4篇
  1968年   7篇
排序方式: 共有948条查询结果,搜索用时 15 毫秒
941.
Sydney's Medically Supervised Injecting Centre delivers the significant benefits of harm reduction, but has been controversial regards the law. Its contested history is examined here through the lens of legal geography. Narrative analysis reveals that the arguments for and against the centre's establishment referenced matters ranging from international treaties through to municipal governance. These arguments and their outcome were variously shaped by the different spaces and scales of jurisdiction but not simply in a zero sum game of law played out through the hierarchically ordered nesting of container-like territories. The implications for legal geography and for public health are discussed.  相似文献   
942.
943.
944.
A multistep classification scheme was used to detect and classify ignitable liquid residues in fire debris into the classes defined by the ASTM E1618‐10 standard method. The total ion spectra (TIS) of the samples were classified by soft independent modeling of class analogy (SIMCA) with cross‐validation and tested on fire debris. For detection of ignitable liquid residue, the true‐positive rate was 94.2% for cross‐validation and 79.1% for fire debris, with false‐positive rates of 5.1% and 8.9%, respectively. Evaluation of SIMCA classifications for fire debris relative to a reviewer's examination led to an increase in the true‐positive rate to 95.1%; however, the false‐positive rate also increased to 15.0%. The correct classification rates for assigning ignitable liquid residues into ASTM E1618‐10 classes were generally in the range of 80–90%, with the exception of gasoline samples, which were incorrectly classified as aromatic solvents following evaporative weathering in fire debris.  相似文献   
945.
Previous research into pollen content of tobacco resulted in a debate. We address this debate and determine that pollen analysis may be able to assist with identifying geographical origin of tobacco. However, the value of any results should be assessed on a case‐by‐case regional basis until sufficient database information is available for an objective interpretation to be undertaken on a global basis. As a first step toward developing comparative data for South America, we analyzed a tobacco sample from Brazil in an effort to identify signature taxa from the state of Minas Gerais. We also assessed the role of honey additives to tobacco to assess this issue. Comparing the data to previously published data, we conclude that pollen signatures can distinguish broad geographic areas. We conclude that this forensic interpretation framework needs to be developed in context of the National Academy of Sciences recommendations for tightening methods in forensic science.  相似文献   
946.
Hereditary hemochromatosis (HH) is one of the most common genetic disorders and may present clinically in a variety of ways. The most common presentation is micronodular cirrhosis with possible associated diabetes. However, HH may also present with cardiac dysfunction and sudden death. The confirmation of unsuspected HH at autopsy is complicated by the growing number of genetic abnormalities, which are not detected by current commercial genetic testing for C282Y and H63D mutations. Consequently, quantitative liver iron studies on fresh or paraffin embedded liver is recommended in confirming HH. The importance of detection and confirmation of HH cannot be overemphasized given the need to screen surviving family members in preventing organ damage of asymptomatic individuals. We present a case of a 38-year-old white woman with micronodular cirrhosis secondary to unsuspected HH that was confirmed by a quantitative liver iron study. The possible presentation of cardiac sudden death from HH, confirmation issues and implications of a HH diagnosis for surviving family members are also discussed.  相似文献   
947.
The boundaries around what parenting plan evaluators should and should not say in their reports to Courts has been debated in both mental health and legal circles for decades. The controversy about whether parenting plan evaluators should make specific recommendations to Courts regarding access plans and decision-making rights revolves around varied views of the limits of mental health professionals' knowledge about such matters, whether they are socio-moral or psychological in nature, and the benefits to children and society of facilitating case-resolution. In the conversation presented below a seasoned family law attorney and a psychologist who is a frequent critic of the practice of making specific recommendations debate this area of controversy.  相似文献   
948.
Publicly funded national science agencies create value as innovation catalysts and through their scientific and research missions, they tackle wicked problems. Understanding how dynamic capabilities and business model innovation enable research-intensive organisations to seize the market in the mission is key to translating bold new science that has impact. We qualitatively explore how Australia's national science agency—the Commonwealth Scientific Industrial Research Organisation (CSIRO)—has pursued open innovation to support business model–dynamic capabilities in an evolving publicly funded landscape. We reflect on the value of open innovation initiatives that have allowed the CSIRO to ambidextrously pursue world-class science while achieving impact.

Points for practitioners

  • Dynamic capabilities and business model innovation are strategic tools for publicly funded national science agencies seeking to seize the market in the mission.
  • We examine a case of business model–dynamic capabilities in CSIRO.
  • Open innovation has been important for CSIRO as part of an ambidextrous approach.
  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