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   1563篇
  免费   78篇
各国政治   57篇
工人农民   204篇
世界政治   130篇
外交国际关系   62篇
法律   844篇
中国共产党   1篇
中国政治   23篇
政治理论   310篇
综合类   10篇
  2023年   13篇
  2022年   10篇
  2021年   12篇
  2020年   35篇
  2019年   48篇
  2018年   67篇
  2017年   71篇
  2016年   63篇
  2015年   68篇
  2014年   70篇
  2013年   242篇
  2012年   63篇
  2011年   94篇
  2010年   54篇
  2009年   65篇
  2008年   75篇
  2007年   55篇
  2006年   55篇
  2005年   47篇
  2004年   42篇
  2003年   43篇
  2002年   38篇
  2001年   35篇
  2000年   24篇
  1999年   20篇
  1998年   22篇
  1997年   18篇
  1996年   13篇
  1995年   12篇
  1994年   18篇
  1993年   10篇
  1992年   6篇
  1991年   11篇
  1990年   12篇
  1989年   7篇
  1988年   8篇
  1986年   4篇
  1985年   7篇
  1984年   7篇
  1983年   5篇
  1982年   8篇
  1981年   6篇
  1980年   7篇
  1979年   7篇
  1978年   6篇
  1977年   4篇
  1976年   5篇
  1974年   5篇
  1973年   5篇
  1967年   4篇
排序方式: 共有1641条查询结果,搜索用时 15 毫秒
971.
Since the mid-1970s, the field of Intimate Partner Violence (IPV) has debated over gender differences in the perpetration of physical partner violence. However, this classical controversy has ignored transgender people since their gender does not seemingly fit the binary categories (male and female) first used to conceptualize IPV. Furthermore, sustained attention on this ceaseless argument has contributed to transgender people remaining invisible to the field of IPV. In this article, we redefine IPV to extend beyond the gender binary and invite the field to shift its focus to transgender people. Research suggests that as many as one in two transgender individuals are victims of IPV, but that multiple barriers prevent this group from acquiring protection that is afforded to others. Therefore, we propose that researchers direct their attention to this topic, and thus, inform police officers, victim advocates, and medical professionals who work directly to combat IPV for all.  相似文献   
972.
The current investigation examined if interparental conflict (IPC), including psychological and physical violence, moderated the relationship between parental depressive symptoms and youth internalizing and externalizing problems, respectively, in a sample of youth with a parent with a history of Major Depressive Disorder (MDD). One hundred and eighty families with a parent with a history of MDD (M age = 41.96; 88.9 % mothers) and a youth in the target age range of 9-to-15 years (49.4 % females; M age = 11.46) participated. Findings indicated that IPC exacerbated the effect of parental depressive symptoms on internalizing, but not externalizing, problems for both males and females. Findings suggest that, in families with a parent who has a history of depression, parental depressive symptoms and IPC together have important implications for youth internalizing problems. Targeting improvement for both parent depressive symptoms and interparental conflict may directly lead to decreases in youth internalizing symptoms in the context of parental depression.  相似文献   
973.
Abstract

The Commonwealth of Kentucky Animal Control and Advisory Board estimates that in 2012, approximately 285,000 dogs and cats entered the shelter system, but only 15% were retrieved by owners or adopted to a new home. While some shelters incorporate adoption, fostering, and low-cost spay and neuter programs, many shelters euthanize the majority of the animals that enter the shelter system. In an effort to address severe deficiencies within the shelter system, Kentucky passed the Humane Shelter Law which defined minimum care and facility standards for animals held in shelters, along with required data collection. The law also placed responsibility with the individual county governments for oversight and implementation of these requirements. This paper presents the background and history of the state policy regarding animal shelters followed by results from a study of the county animal shelters in Kentucky. Results from the study suggest that numerous problems with data collection and maintenance exist throughout Kentucky and that levels of care vary widely for animals in the system. We discuss these issues before making recommendations for improvement to this system and its oversight. Our research suggests that with proper funding and oversight, Kentucky’s statute could become a model for humane animal sheltering.  相似文献   
974.
Since the enactment of the Trafficking Victims Protection Act of 2000, there has been an increase in both media and scholarly discussions of human trafficking. Although most of these discussions have framed human trafficking as a crime committed primarily by organized crime groups, there has been very little empirical research examining the link between human trafficking and organized crime. In an effort to start to address this gap in the research, we conduct an exploratory study to determine if there is a link between human trafficking and organized crime in one of the Southeast’s human trafficking hubs – Atlanta, Georgia. We collected data on 24 federal human trafficking cases that were indicted in metropolitan Atlanta between 2000 and 2013. Then, we conducted a content analysis of the court documents for each federal human trafficking case and classified the relationship between organized crime and human trafficking using one of three categories: nonexistent, organized criminal network, organized criminal syndicate. For the majority of the human trafficking cases (n = 16), we found that there was no relationship between organized crime and human trafficking. For the cases that did show a relationship between organized crime and human trafficking, we found evidence of organized criminal networks in eight of the cases and evidence of an organized criminal syndicate in only one case.  相似文献   
975.
976.
This research studies fear patterns within fear appeal anti-speeding television commercials. A pattern of fear is the sequence of fear arousal and fear reduction, if any, that is felt by the viewing audience when exposed to a fear appeal advertisement. Many road safety advertisers use fear appeals, such as "shock" advertising, that result in fear arousal, leaving the viewer feeling extremely tense. The moment-to-moment reactions of young drivers to 12 road safety commercials are gauged using a dynamic, temporal measure of fear. The fear patterns generated from each ad are analyzed and a new perspective on creating fear appeal road safety advertisements, with an emphasis on fear-relief, fear-partial relief, and fear-only patterns, is discussed.  相似文献   
977.
Journal of Youth and Adolescence - There are mixed findings when examining if technology use is harmful for adolescent sleep and health. This study builds on these mixed findings by examining the...  相似文献   
978.
In this article, a new framework for improving risk assessments of novel genetically engineered organisms (GEOs) is developed and applied. The Procedurally Robust Risk Assessment Framework (PRRAF) provides a set of principles and criteria for assessing and enhancing risk assessment protocols for GEOs under conditions of high uncertainty. The application of PRRAF is demonstrated using the case of a genetically engineered mosquito designed to kill its wild population and therefore decrease disease transmission. Assessments for regulatory approval of this genetically engineered insect fall short of several PPRAF criteria under the principles of humility, procedural validity, inclusion, anticipation, and reflexivity. With the emergence of GEOs designed to spread in ecosystems, such as those with gene drives, it will become increasingly important for regulatory agencies and technology developers to bolster their risk analysis methods and processes prior to field testing. PRRAF can be used as a flexible guide for doing so within a variety of institutional, regulatory, and governance contexts.  相似文献   
979.
Abstract: Mitochondrial DNA analysis of skeletal material is invaluable in forensic identification, although results can vary widely among remains. Previous studies have included bones of different ages, burial conditions, and even species. In the research presented, a collection of human remains that lacked major confounders such as burial age, interment style, and gross environmental conditions, while displaying a very broad range of skeletal degradation, were examined for both mitochondrial DNA (mtDNA) quality and quantity. Overall skeletal weathering, individual bone weathering, and bone variety were considered. Neither skeletal nor bone weathering influenced DNA quality or quantity, indicating that factors that degrade bone do not have the same effect on DNA. In contrast, bone variety, regardless of weathering level, was a significant element in DNA amplification success. Taken together, the results indicate that neither skeletal nor individual bone appearance are reliable indicators of subsequent mtDNA typing outcomes, while the type of bone assayed is.  相似文献   
980.
Abstract: A pilot study evaluated a computer‐based method for comparing digital dental images, utilizing a registration algorithm to correct for variations in projection geometry between images prior to a subtraction analysis. A numerical assessment of similarity was generated for pairs of images. Using well‐controlled laboratory settings, the method was evaluated as to its ability to identify the correct specimen with positive results. A subsequent clinical study examined longitudinal radiographic examinations of selected anatomical areas on 47 patients, analyzing the computer‐based method in making the correct identification based upon a threshold level of similarity. The results showed that at a threshold of 0.855, there were two false negative and two false positive identifications out of 957 analyses. Based on these initial findings, 25 dental records having two sets of full mouth series of radiographs were selected. The radiographs were digitized and grouped into six anatomical regions. The more recent set of films served as postmortem images. Each postmortem image was analyzed against all other images within the region. Images were registered to correct for differences in projection geometry prior to analysis. An area of interest was selected to assess image similarity. Analysis of variance was used to determine that there was a significant difference between images from the same individual and those from different individuals. Results showed that the threshold level of concordance will vary with the anatomical region of the mouth examined. This method may provide the most objective and reliable method for postmortem dental identification using intra‐oral images.  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