全文获取类型
收费全文 | 260篇 |
免费 | 11篇 |
专业分类
各国政治 | 39篇 |
工人农民 | 30篇 |
世界政治 | 15篇 |
外交国际关系 | 12篇 |
法律 | 116篇 |
中国共产党 | 1篇 |
中国政治 | 3篇 |
政治理论 | 54篇 |
综合类 | 1篇 |
出版年
2023年 | 6篇 |
2020年 | 7篇 |
2019年 | 12篇 |
2018年 | 6篇 |
2017年 | 9篇 |
2016年 | 9篇 |
2015年 | 7篇 |
2014年 | 9篇 |
2013年 | 27篇 |
2012年 | 11篇 |
2011年 | 9篇 |
2010年 | 3篇 |
2009年 | 7篇 |
2008年 | 10篇 |
2007年 | 13篇 |
2006年 | 7篇 |
2005年 | 9篇 |
2004年 | 13篇 |
2003年 | 3篇 |
2002年 | 6篇 |
2001年 | 6篇 |
2000年 | 5篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 4篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1993年 | 3篇 |
1992年 | 7篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1984年 | 4篇 |
1983年 | 1篇 |
1982年 | 4篇 |
1980年 | 3篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1974年 | 3篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有271条查询结果,搜索用时 0 毫秒
41.
42.
43.
44.
45.
46.
47.
48.
The application of infrared chemical imaging to the analysis of bicomponent fibers was evaluated. Eleven nominally bicomponent fibers were examined either side-on or in cross-section. In six of the 11 samples, infrared chemical imaging was able to spatially resolve two spectroscopically distinct regions when the fibers were examined side-on. As well as yielding characteristic infrared spectra of each component, the technique also provided images that clearly illustrated the side-by-side configuration of these components in the fiber. In one case it was possible to prepare and image a cross-section of the fiber, but in general the preparation of fiber cross-sections proved very difficult. In five of the 11 samples, the infrared spectra could be used to identify the overall chemical composition of the fibers, according to a published classification scheme, but the fiber components could not be spatially resolved. Difficulties that are inherent to conventional "single-point" infrared spectroscopy, such as interference fringing and sloping baselines, particularly when analyzing acrylic type fibers, were also encountered in the infrared chemical image analysis of bicomponent fibers. A number of infrared sampling techniques were investigated to overcome these problems, and recommendations for the best sampling technique are given. Chemical imaging results were compared with those obtained using conventional fiber microscopy techniques. 相似文献
49.
50.
Pushpa Kanagaratnam Robin Mason Ilene Hyman Lisa Manuel Helene Berman Brenda Toner 《Journal of family violence》2012,27(7):647-658
Helping women victimized by intimate partner violence (IPV) is a challenge, particularly when the women belong to diverse ethnic groups. The objective of our study was to collect information on perceptions of coping with IPV from the perspective of a specific immigrant group of women. Sixty-three women from the Tamil community in Toronto representing different generations and experiences of IPV were interviewed in focus group settings about their views of coping with IPV. Study findings suggested that their views were deeply embedded in their sociocultural context and influenced by the gender-role expectations from the community. The women showed a marked preference for “passive” modes of coping rather than “active.” Study findings have implications for the development of alternative approaches to helping ethnically diverse women deal with IPV. 相似文献