全文获取类型
收费全文 | 575篇 |
免费 | 11篇 |
专业分类
各国政治 | 31篇 |
工人农民 | 29篇 |
世界政治 | 53篇 |
外交国际关系 | 34篇 |
法律 | 225篇 |
中国政治 | 4篇 |
政治理论 | 206篇 |
综合类 | 4篇 |
出版年
2019年 | 7篇 |
2018年 | 11篇 |
2017年 | 8篇 |
2016年 | 12篇 |
2015年 | 8篇 |
2014年 | 10篇 |
2013年 | 93篇 |
2012年 | 4篇 |
2011年 | 14篇 |
2010年 | 9篇 |
2009年 | 18篇 |
2008年 | 32篇 |
2007年 | 19篇 |
2006年 | 13篇 |
2005年 | 14篇 |
2004年 | 33篇 |
2003年 | 17篇 |
2002年 | 18篇 |
2001年 | 9篇 |
2000年 | 10篇 |
1999年 | 9篇 |
1998年 | 18篇 |
1997年 | 8篇 |
1996年 | 8篇 |
1995年 | 12篇 |
1994年 | 9篇 |
1993年 | 10篇 |
1992年 | 5篇 |
1991年 | 11篇 |
1990年 | 8篇 |
1989年 | 11篇 |
1988年 | 9篇 |
1987年 | 7篇 |
1986年 | 5篇 |
1985年 | 8篇 |
1984年 | 7篇 |
1983年 | 8篇 |
1982年 | 5篇 |
1981年 | 4篇 |
1980年 | 8篇 |
1979年 | 9篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 4篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1973年 | 5篇 |
1972年 | 7篇 |
1970年 | 5篇 |
1969年 | 2篇 |
排序方式: 共有586条查询结果,搜索用时 62 毫秒
71.
72.
73.
74.
An evaluation of matching unknown writing inks with the United States International Ink Library 总被引:2,自引:0,他引:2
Laporte GM Arredondo MD McConnell TS Stephens JC Cantu AA Shaffer DK 《Journal of forensic sciences》2006,51(3):689-692
Utilizing a database of standards for forensic casework is a valuable resource. Undoubtedly, as more standards (and corresponding information about the specimens) are collected, there is a greater certainty of identification when a questioned and a known item cannot be distinguished after a series of analyses. The United States Secret Service and the Internal Revenue Service National Forensic Laboratory jointly maintain the largest known forensic collection of writing inks in the world, which is comprised of over 8500 ink standards collected worldwide, dating back to the 1920s. This study was conducted to evaluate the reliability of matching arbitrarily purchased pens with known inks from a database. One hundred pens were randomly obtained from a variety of sources and their respective ink compositions were compared with standards. Eighty-five of the inks were determined to be suitable for comparison utilizing optical examinations and thin-layer chromatography. Three of the inks did not match any of the specimens on record; one of these inks was similar to an ink from an identical brand of pen that was in the database, but had a modified formulation. 相似文献
75.
76.
77.
78.
79.
Thirty years have passed since the publication of "Cross-Subsidization:Pricing in Public Enterprises." The article rigorously definedcross-subsidization and is now a standard citation of regulatorsand scholars addressing the pricing of regulated multiproductfirms. The incremental cost test and the stand-alone cost test,however, have often been misunderstood and misapplied. Thisarticle answers the most common questions that have arisen inthe application of these tests for cross-subsidization and correctsthe most common errors that have been committed in their application. 相似文献
80.
Although adolescents are commonly assumed to be rebellious, risky and moody, two experiments demonstrate for the first time
that these beliefs operate both explicitly and implicitly as stereotypes. In Experiment 1, participants (a) explicitly endorsed
adolescent stereotypes and (b) implicitly associated adolescent stereotyped words more rapidly with the adolescent than the
adult social category. Individual differences in the explicit endorsement of adolescent stereotypes predicted explicit perceptions
of the rebelliousness of a 17-year-old but not a 71-year-old, although individual differences in implicit stereotyping did
not. Identification with adults was associated with greater implicit stereotyping but not explicit stereotyping. In Experiment
2, subliminal exposure to adolescent stereotyped words increased subsequent perceptions of the rebelliousness of a 17-year-old
but not a 71-year-old. Although individual differences in implicit adolescent stereotyping did not predict explicit evaluations
of adolescents, stereotypes of adolescents nevertheless influenced explicit evaluations unconsciously and unintentionally.
相似文献
Curtis D. HardinEmail: |