全文获取类型
收费全文 | 446篇 |
免费 | 22篇 |
专业分类
各国政治 | 14篇 |
工人农民 | 61篇 |
世界政治 | 51篇 |
外交国际关系 | 13篇 |
法律 | 266篇 |
中国政治 | 10篇 |
政治理论 | 51篇 |
综合类 | 2篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 5篇 |
2021年 | 3篇 |
2020年 | 15篇 |
2019年 | 14篇 |
2018年 | 24篇 |
2017年 | 16篇 |
2016年 | 20篇 |
2015年 | 12篇 |
2014年 | 24篇 |
2013年 | 66篇 |
2012年 | 21篇 |
2011年 | 12篇 |
2010年 | 14篇 |
2009年 | 28篇 |
2008年 | 24篇 |
2007年 | 28篇 |
2006年 | 20篇 |
2005年 | 25篇 |
2004年 | 14篇 |
2003年 | 12篇 |
2002年 | 15篇 |
2001年 | 6篇 |
2000年 | 2篇 |
1999年 | 7篇 |
1998年 | 4篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 6篇 |
1991年 | 5篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1980年 | 2篇 |
排序方式: 共有468条查询结果,搜索用时 0 毫秒
331.
332.
In the spring of 2000, the National Institute of Standards and Technology and nineteen participants conducted a comparison of smokeless powder additive compositional measurements. The purpose of this exercise was to determine the state-of-the-practice for forensic smokeless powder determinations. For the comparison, two handgun reloading powder samples were mixed and were compositionally evaluated for homogeneity by NIST. Participant laboratories included military, academic, and state/local, federal, and international forensic agencies. We solicited qualitative data identifying nitroglycerin, diphenylamine, N-nitrosodiphenylamine, and ethyl centralite. In addition, some laboratories provided identification of additional ingredients, such as nitrocellulose, or reported other measurements, such as dimensional morphology. In this paper, laboratory identification of the smokeless powder additives and a summary of the measurement methods used for the evaluations are presented. All laboratories correctly identified NG and the major stabilizers. Some disparity between laboratories was noted for the identification of minor (<0.01% by weight) stabilizers and stabilizer decomposition products. 相似文献
333.
334.
This article assesses the contributions of studies in the rational choice (RC) tradition to scholarly understanding of Latin American politics. It groups some representative works according to their use of RC assumptions, and also reviews some of the major works in the institutionalist tradition. It argues that works in the RC tradition have neither forced a major rethinking of established theories nor filled major lacunae, although they have illuminated some phenomena that were only partly understood. The RC approach works best for narrow questions in which power relations and structural constraints are stable, whereas its essential assumptions become untenable in questions that involve shifting power relations among social groups and the state over time. 相似文献
335.
We hypothesized that incongruous misfortunes generate stronger affective reactions and perceptions of injustice than do equally
severe and equally probable congruous misfortunes. Incongruous misfortunes are defined as ones that bring to mind thoughts
or images of the misfortune either happening to a different person or happening to the same person by a different means. In
a series of studies, victims of incongruous negative life events (e.g., wartime casualties of “friendly” five) were expected
to experience stronger reactions of regret, shock, outrage, and perceived injustice than victims of more congruous versions
of the same events. Differences between reactions to incongruous misfortunes and subjectively improbable misfortunes are explored. 相似文献
336.
337.
338.
Bruno J. Anthony Laura G. Anthony Tanya M. Morrel Michelle Acosta 《Journal of youth and adolescence》2005,34(1):31-39
Teacher ratings of 336 preschool children (mean age = 48 months) attending two urban Head Start programs were collected to examine the influence of contextual variables of teacher training, classroom, and site on the prevalence of significant problems. The prevalence of externalizing behaviors in the problem range was higher than expected and fewer children were rated in the well-adjusted range on social competence measures. Psychometric characteristics of the ratings indicated that teachers in this urban setting were less consistent in their ratings of internalizing problems, calling into question the lack of elevation of such problems in this population. Ratings by teachers and teacher assistants of the same children showed low agreement; the level of ratings was not affected by differences in training but did vary across classrooms. Hierarchical linear modeling analyses of the entire sample showed significant effects of classroom and site on problem behaviors and social competence. These results reveal the wide variation in problem frequency across classrooms, which needs to be considered in the implementation and evaluation of evidence-based interventions. Further, these results point to the importance of studying possible lasting effects on children exposed to these differing contexts. 相似文献
339.
The most complex and risky decisions made by forensic psychiatrists revolve around the decision to release insanity acquittes from custody. This decision has several levels of risk, including the potential liability to the psychiatrist as well as the possible risk to the community. A single bad outcome, even if not predictable, can have disastrous results, not only for victims, but also for the releasing facility. Since predicting violence has so many problems, we chose to look at completeness of treatment instead, so we could say to the Court, "We don't know about violence, but we do know that he has vastly improved." Since many NGRI (Not Guilty by Reason of Insanity) patients spend years in the hospital, they are also expensive. They have rights, as well; therefore the complex assessment must be done as quickly and as accurately as possible. We have developed a spread sheet program to compare these multiple factors, and have compared it against the clinical decisions we have made in more than 100 discharges. We believe this gives a framework for decision-making that will increase the consistency of this process. 相似文献
340.
Allele frequencies of 19 STR loci in a Philippine population generated using AmpFlSTR multiplex and ALF singleplex systems 总被引:3,自引:0,他引:3
De Ungria MC Roby RK Tabbada KA Rao-Coticone S Tan MM Hernandez KN 《Forensic science international》2005,152(2-3):281-284
Allele frequencies for the 19 short tandem repeat (STR) loci CSF1PO, D2S1338, D3S1358, D5S818, D7S820, D8S306, D8S1179, D13S317, D16S539, D18S51, D19S433, D21S11, DHFRP2 (FOLP23), F13A01, FES/FPS, FGA, TH01, TPOX, and vWA were obtained from a sample of 106 unrelated Filipinos from different regions of the Philippine archipelago. 相似文献