全文获取类型
收费全文 | 857篇 |
免费 | 38篇 |
专业分类
各国政治 | 111篇 |
工人农民 | 84篇 |
世界政治 | 77篇 |
外交国际关系 | 52篇 |
法律 | 346篇 |
中国政治 | 34篇 |
政治理论 | 186篇 |
综合类 | 5篇 |
出版年
2023年 | 7篇 |
2022年 | 5篇 |
2021年 | 10篇 |
2020年 | 13篇 |
2019年 | 41篇 |
2018年 | 43篇 |
2017年 | 50篇 |
2016年 | 48篇 |
2015年 | 28篇 |
2014年 | 27篇 |
2013年 | 180篇 |
2012年 | 24篇 |
2011年 | 42篇 |
2010年 | 19篇 |
2009年 | 19篇 |
2008年 | 31篇 |
2007年 | 22篇 |
2006年 | 21篇 |
2005年 | 14篇 |
2004年 | 20篇 |
2003年 | 16篇 |
2002年 | 25篇 |
2001年 | 16篇 |
2000年 | 14篇 |
1999年 | 13篇 |
1998年 | 8篇 |
1997年 | 6篇 |
1996年 | 6篇 |
1995年 | 5篇 |
1994年 | 9篇 |
1993年 | 7篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 7篇 |
1989年 | 6篇 |
1988年 | 3篇 |
1987年 | 8篇 |
1985年 | 4篇 |
1984年 | 7篇 |
1983年 | 6篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1979年 | 5篇 |
1978年 | 5篇 |
1975年 | 3篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1967年 | 2篇 |
1966年 | 3篇 |
排序方式: 共有895条查询结果,搜索用时 15 毫秒
841.
842.
Passive Drip Stain Formation Dynamics of Blood onto Hard Surfaces and Comparison with Simple Fluids for Blood Substitute Development and Assessment, 下载免费PDF全文
Theresa Stotesbury M.Sc. Michael C. Taylor Ph.D. Mark C. Jermy Ph.D. 《Journal of forensic sciences》2017,62(1):74-82
The spreading dynamics of blood dripping onto hard surfaces is compared to two spreading models. Samples of human blood, porcine blood, and Millipore® water were dripped onto cardboard, foamcore, and glass surfaces in low velocity passive drip simulations. Final stain diameter, the total number of spines and scallops, and angle of impact were measured and analyzed. Spreading is best predicted by applying the concept of effective viscosity to the Scheller and Bousfield (R2 = 0.91) and Roisman (R2 = 0.89) spreading models. In the tested conditions, blood spreads with Newtonian tendencies; however, has quantifiable differences in stain appearance to Newtonian fluids like water. This is encouraging for the development of water‐based fluids as synthetic blood substitutes (SBSs). The work presents an assessment platform to quantify and score the performance of simple water‐based fluids using final stain diameter (6 points) and number of spines and scallops (6 points) at six dripping heights between 20 and 120 cm. The angle of impact of a stain alone is not a sensitive measure of SBS performance, but stain formation scores the SBS's performance with another 1 point. Together these features generate a quantitative relative ranking system, of a maximum possible 13 points, that can be used to support the use of a particular fluid for the creation of a drip stain. The performance of twenty simple fluids in the simulated dripping assessment test is described. 相似文献
843.
Suicide rates in prisons in England and Wales are high, including those in juvenile detention centers. Previous deliberate self-harm (DSH) is the strongest predictor of suicide in the general population. There is limited information on how many juvenile offenders (15 to 18 year-olds) have a history of DSH at the time of entering custody, or on factors associated with previous DSH. We aimed to determine the prevalence of previous DSH and suicidal ideation in a population of juvenile offenders in custody and to identify factors associated with DSH and suicidal ideation. Seven out of 45 subjects (15.6%) reported an act of DSH in the past. Twelve (26.6%) reported past suicidal ideation. Peer relationship difficulties and sexual abuse were significantly associated with DSH (p < 0.05). Other factors showed a trend toward being more common among those with DSH, but the premature ending of the project by the juvenile detention center prevented full investigation of the extent of DSH and associated factors. Nevertheless, the results indicated a much higher rate of DSH in this population than in young males in the community. A larger joint project with juvenile detention centers is required to confirm the extent of previous DSH at the time young offenders are admitted, and the associated risk factors, in order to assist prevention and intervention strategies. 相似文献
844.
The authors outline the place of their course in a Polytechnic Humanities Degree and show how, concentrating primarily upon the novel and a line of women novelists from Jane Austen to Doris Lessing, new perspectives upon literary criticism and literary history in relation to society and culture are opened up. Teaching methods and attitudes are discussed in relation to the re-evaluation of the role of women as readers and critics, as well as authors. The success of the course, in terms of the interest it has aroused among students in women authors and feminist criticism is discussed, together with the effects of open recognition of differences of emphasis and point of view between the two tutors responsible for it. The authors express their confidence in the course as undermining a harmful acceptance of the idea of a single established literary tradition, which ‘happens’ to be dominated by white, male authors and critics, thus opening the way for students to appreciate how, as Adrienne Rich puts it, ‘there is another story to be told’. 相似文献
845.
846.
Using a national-level U.S. database, T. K. Shackelford (2001) calculated rates of uxoricide (the murder of a woman by her romantic partner) by relationship type (cohabiting or marital), by ages of the partners, and by the age difference between partners. Women in cohabiting relationships were 9 times more likely to be killed by their partner than were married women. Within marriages, the risk of uxoricide decreases with a woman's age. Within cohabiting relationships, middle-aged women were at greatest risk of uxoricide. The risk of uxoricide increased with greater age difference between partners. We sought to replicate the findings of Shackelford (2001) using a national-level database that includes information on more than 4,400 homicides that occurred in Australia between 1989 and 2002. Despite the higher rate of partner killing in the United States, and despite other cultural differences between the two countries, we replicated key patterns with the Australian data. 相似文献
847.
Taylor J Jasperson T 《Canadian HIV/AIDS policy & law review / Canadian HIV/AIDS Legal Network》2001,6(1-2):83-86
This paper, by Jennifer Taylor and Theresa Jasperson, looks at a successful harm-reduction initiative developed by Streetworks, a needle exchange program in Edmonton, Alberta. The Natural Helpers initiative provides and enhances the skills, knowledge, resources, and support that people who use injection drugs need in order to take care of others in their community. The evolution of the project, from its inception to the present situation, is described. 相似文献
848.
849.
Michaell A. Taylor 《European Journal of Political Research》2002,38(5):95-134
While the literature suggests that clear lines of responsibility lead to greater incumbent dependence on economic conditions for support, little has been said about how electorates channel frustrations in systems characterized by 'fuzzy' lines of responsibility, i.e., the shape and status of parliamentary government in relation to possible choice of electors open to them. The argument presented here is that fuzzy lines of responsibility result in lower incentives to participate in political processes and greater system dissatisfaction given economic circumstances. This decline is greater in systems in which incumbent responsibility is less easily identified by the individual citizen. To test this, data are collected from eight European nations over the period 1975–1992. Split sample and slope intervention models with robust estimation are employed at the individual level. System level aggregates are analyzed using pooled time–series analysis to confirm individual level findings. Finally, election turnout data are also analyzed to obtain election level verification of survey findings. Evidence suggests that participation is more heavily influenced by economic conditions in fuzzy settings. Coupled with existing literature, this suggests that while clear settings encourage punishment of the incumbent unclear settings tend to cause individuals to become more withdrawn and alienated. However, economic conditions are also important to overall system effects. The findings herein suggest that unclear or fuzzy settings increase the role of economic conditions in determination of system affect. 相似文献
850.
Jenny Pearce 《Development in Practice》1997,7(4):438-455
While some recent internal conflicts have attracted international attention, other long-term conflicts with high accumulative death tolls have been relatively ignored. A decontextualised and partial view of conflict and violence is further encouraged by the separation between the emergency and development sections in many Northern aid agencies. Drawing on detailed case-studies of postconflict experience in El Salvador, Peru, and Nicaragua, the author argues that conflict analysis, emergency intervention, and peace-building must be rooted within specific socio-historical contexts. The article ends with a critical reflection on the extent to which local-level capacities have in fact been able to influence the post-war situation and prospects for long-term and sustainable peace-building in these three countries. 相似文献