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   8230篇
  免费   694篇
  国内免费   189篇
  9113篇
  2025年   20篇
  2024年   106篇
  2023年   198篇
  2022年   147篇
  2021年   183篇
  2020年   407篇
  2019年   395篇
  2018年   359篇
  2017年   389篇
  2016年   333篇
  2015年   240篇
  2014年   324篇
  2013年   996篇
  2012年   191篇
  2011年   281篇
  2010年   241篇
  2009年   313篇
  2008年   369篇
  2007年   395篇
  2006年   397篇
  2005年   334篇
  2004年   316篇
  2003年   218篇
  2002年   182篇
  2001年   131篇
  2000年   99篇
  1999年   118篇
  1998年   94篇
  1997年   75篇
  1996年   54篇
  1995年   56篇
  1994年   44篇
  1993年   44篇
  1992年   35篇
  1990年   19篇
  1989年   26篇
  1988年   18篇
  1985年   128篇
  1984年   125篇
  1983年   104篇
  1982年   89篇
  1981年   66篇
  1980年   73篇
  1979年   65篇
  1978年   95篇
  1977年   57篇
  1976年   43篇
  1975年   31篇
  1974年   24篇
  1973年   28篇
排序方式: 共有9113条查询结果,搜索用时 15 毫秒
851.
852.
    
Road Sign Detection and Recognition (RSDR) is aimed to enable drivers maintain basic functionality with the aim of identifying and notifying driver through the existing restrictions so that the process is a success on the present widened road. Examples for RSDR include ‘traffic light ahead’ or ‘pedestrian crossing’ signs. An innovative RSDR system has been introduced which comprises of pre-processing, edge detection, feature extraction, features selection and Ensemble Fuzzy Support Vector Machine (EFSVM) classifier. Feature selection is carried out successfully by deployment of Ant Colony Optimization (ACO) algorithm to determine most prominent and definitive features. These features are then fed into the ensemble SVM to enable both road side traffic detection as well as recognition. Suggested system’s performance is analyzed and evaluated with respect to road signs having a capable recognition rate.  相似文献   
853.
    
Intersectionality has become a significant intellectual approach for those thinking about the ways that race, gender, and other social identities converge in order to create unique forms of oppression. Although the initial work on intersectionality addressed the unique position of black women relative to both black men and white women, the concept has since been expanded to address a range of social identities. Here we consider how to apply some of the theoretical tools provided by intersectionality to the clinical context. We begin with a brief discussion of intersectionality and how it might be useful in a clinical context. We then discuss two clinical scenarios that highlight how we think considering intersectionality could lead to more successful patient–clinician interactions. Finally, we extrapolate general strategies for applying intersectionality to the clinical context before considering objections and replies.  相似文献   
854.
855.
    
Transdiagnostic cognitive behavioral interventions target different cognitive processes to promote mental health, including cognitive fusion and cognitive reappraisal. Determining the relative impact of cognitive fusion and reappraisal on a range of student mental health concerns could help interventions target psychopathological cognitive processes more effectively. Therefore, this study examined the longitudinal impact of cognitive fusion and reappraisal on mental health and functioning outcomes. A series of hierarchical regression models tested the effects of cognitive fusion and reappraisal in a sample of college students (n = 339). When controlling for reappraisal and baseline symptoms, fusion predicted distress, depression, generalized anxiety, social anxiety, hostility, academic distress, and student role problems 1 month later. Reappraisal predicted only student role problems longitudinally when controlling for fusion. These results suggest that cognitive fusion is a stronger predictor than reappraisal for a range of student mental health concerns and may be a particularly important target for improving student mental health.  相似文献   
856.
    
Recent approaches to the study of queer migration politics and diaspora hold significant potential in advancing the study of the geographies of migration. Most notably, they can help illuminate the impossible positions that migrants often occupy; challenge diasporic norms governing cultural authenticity; destabilize conventional understandings of gender, nation, and home; and situate diasporic experiences within present and future possibilities for new ways of expressing intimacy and kinship beyond the limited scope of nationality and citizenship. In this paper, I will argue for a queer intervention on migration studies that critically expands geographic approaches to migration by denaturalizing and complicating approaches to understanding the emotional diasporic experiences of belonging and home. I will think through the usefulness of such approaches in my own ongoing research on debates concerning Iranian diasporic identities and communities in Iranian diasporic cinema. In analyzing two recent films, I argue for the tremendous creative potential of diasporic filmmaking in imagining complex spaces of home and belonging that otherwise seem impossible. Ultimately, I see queer approaches to migration politics and diaspora as having significant creative, critical, and positive potential to understanding how migrants placed in impossible situations create new lives for themselves.  相似文献   
857.
This paper examines how girls confined in a juvenile detention facility contend with messages from adult staff about their gender, sexual, and racial identities and practices. I show that girls are perpetually on the cusp of being punished for sexual misconduct for merely being sexually expressive, although actual punishment is arbitrary and inconsistently applied by staff. More importantly, girls' stories about their sexualities illuminate the force of punitive confinement sculpted by intergenerational relations that mask carceral logics under a façade of adult care. Constant surveillance and behavioral evaluations deem all sexuality to be available for inspection and introspection. I explore how girls come to understand their capacities for sexual expression within these limits of tight spatial control, persistent behavioral scrutiny, and a pervasive adult language of youth pathology. Racism and heterosexism centrally situate intergenerational relations of control and care in the facility, disturbingly burdening African-American and queer girls with the added pain of coming to terms with the impossibility of achieving the conformity that they are taught should be within their grasp with proper gender-sexual behaviors. Thus, rehabilitation is perpetually beyond girls' reach, since in spaces of juvenile detention personal and behavioral reform is an unending process.  相似文献   
858.
    
By using the Gezi Park protests that took place in Turkey in 2013 as a case, we explore the significance of emotional echo-chamber involved in protests. The analyses are composed of thirty-seven interviews conducted with activists on how they define and understand their preferences and motivations for protesting. We discuss how participants get influenced by beliefs, motives and opinions and bring forth the changes of emotions during such processes and help create an emotional echo-chamber.  相似文献   
859.
According to Australian regulations, the right to marriage migration applies only to genuine relationships. Marriage migration couples must demonstrate to state agents the authenticity of their romantic attachments in order to achieve a positive outcome in their applications. This article examines how love and intimacy in the context of Australian immigration regulations are interpreted by Thai women who originate from a non-Western culture. Drawing on interviews and ethnographic work with 15 Thai women marriage migrants, this article illustrates the ways in which the practical actions of caring and sharing are mobilized as important strategies for expressing real love and intimacy in marriage migration processes. Thus, although these women narrate their migration experiences as based on love and intimacy, such narratives are not free from global economic and structural inequalities. Women's constructions of love and intimacy presented here can transform over time in response to new personal experiences, changing social contexts and fluctuating circumstances in the processes of marriage migration.  相似文献   
860.
    
Over the last few years, several studies have investigated the possible effects of mindfulness meditation on time perception. Mindfulness meditation has been linked to both longer time production (TP) and increased bodily perception, and bodily processes are in turn thought to lie at the core of human time perception. Nevertheless, the connection between mindful movements (MMs; i.e., specific types of mind–body coordination‐demanding physical activity) and time perception has been ignored. Consequently, in the current study we examined the effect of MMs on TP. A mixed observational study design was adopted to investigate whether (1) the extensive practice of MMs is associated with longer TP and interlimb coordination efficiency, and (2) there is a relationship between these two variables. Thirty‐four healthy adults volunteered, including 11 Aikido and nine advanced Quadrato Motor Training (aQMT) practitioners, and 14 physically non‐active controls. Practitioners of aQMT had significantly longer produced durations in contrast to the Aikido and control groups. In addition, longer produced duration was associated with increased coordination efficiency. In conclusion, the current results are in line with previous studies linking embodied time and mindful meditation, and suggest the importance of incorporating movement meditation, especially in the context of time estimation and the self.  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