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   24644篇
  免费   187篇
  2022年   24篇
  2021年   28篇
  2020年   58篇
  2019年   86篇
  2018年   3557篇
  2017年   2882篇
  2016年   2341篇
  2015年   279篇
  2014年   180篇
  2013年   527篇
  2012年   750篇
  2011年   2559篇
  2010年   2626篇
  2009年   1585篇
  2008年   1864篇
  2007年   2356篇
  2006年   195篇
  2005年   347篇
  2004年   304篇
  2003年   261篇
  2002年   224篇
  2001年   124篇
  2000年   118篇
  1999年   100篇
  1998年   89篇
  1997年   78篇
  1996年   78篇
  1995年   54篇
  1994年   56篇
  1993年   55篇
  1992年   67篇
  1991年   65篇
  1990年   73篇
  1989年   52篇
  1988年   39篇
  1987年   46篇
  1986年   51篇
  1985年   62篇
  1984年   66篇
  1983年   50篇
  1982年   60篇
  1981年   46篇
  1980年   44篇
  1979年   40篇
  1978年   33篇
  1977年   34篇
  1976年   31篇
  1975年   28篇
  1974年   26篇
  1973年   29篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
881.
Verb learning is difficult for children (Gentner, 1982 ), partially because children have a bias to associate a novel verb not only with the action it represents, but also with the object on which it is learned (Kersten & Smith, 2002 ). Here we investigate how well 4‐ and 5‐year‐old children (N = 48) generalize novel verbs for actions on objects after doing or seeing the action (e.g., twisting a knob on an object) or after doing or seeing a gesture for the action (e.g., twisting in the air near an object). We find not only that children generalize more effectively through gesture experience, but also that this ability to generalize persists after a 24‐hour delay.  相似文献   
882.
Individual differences in young children's frustration responses set the stage for myriad developmental outcomes and represent an area of intense empirical interest. Emotion regulation is hypothesized to comprise the interplay of complex behaviors, such as facial expressions, and activation of concurrent underlying neural systems. At present, however, the literature has mostly examined children's observed emotion regulation behaviors and assumed underlying brain activation through separate investigations, resulting in theoretical gaps in our understanding of how children regulate emotion in vivo. Our goal was to elucidate links between young children's emotion regulation‐related neural activation, facial muscular movements, and parent‐rated temperamental emotion regulation. Sixty‐five children (age 3–7) completed a frustration‐inducing computer task while lateral prefrontal cortex (LPFC) activation and concurrent facial expressions were recorded. Negative facial expressions with eye constriction were inversely associated with both parent‐rated temperamental emotion regulation and concurrent LPFC activation. Moreover, we found evidence that positive expressions with eye constriction during frustration may be associated with stronger LPFC activation. Results suggest a correspondence between facial expressions and LPFC activation that may explicate how children regulate emotion in real time.  相似文献   
883.
The relationship between religious orientation and personality has been investigated using several different measures and diverse samples. As part of a larger study, 114 undergraduate students were given the Duke University Religion Index (DUREL) to include only those participants who were considered religious. The final sample of 80 participants were given the NEO Personality Inventory-Revised (NEO PI-R) and the New Indices of Religious Orientation (NIRO). Based on the results of the bivariate correlations, higher levels of intrinsic religious orientation were associated with greater Agreeableness and Conscientiousness. Multivariate analyses further revealed that Agreeableness was the most important personality variable when predicting intrinsic and quest religious orientations, with higher levels of Agreeableness predicting greater intrinsic and lower quest orientations. While lower levels of Neuroticism predicted greater intrinsic orientation, higher levels of Neuroticism predicted greater quest orientations. Higher Conscientiousness predicted greater intrinsic and lower quest orientations. Implications of these findings are discussed.  相似文献   
884.
According to neo-republicans, democracy is morally justified because it is among the prerequisites for freedom as non-domination. The claim that democracy secures freedom as non-domination needs to explain why democratic procedures contribute to non-domination and for whom democracy secures non-domination. This requires an account of why domination is countered by democratic procedures and an account of to whom domination is countered by access to democratic procedures. Neo-republican theory of democracy is based on a detailed discussion of the former but a scant discussion of the latter. We address this lacuna by interpreting the two most influential principles of inclusion, the all-subjected principle and the all-affected principle, in light of neo-republican commitments. The preliminary conclusion is that both principles are able to capture relations of domination between the democratic state and the people controlled by it in the relevant sense. Yet, the state has virtually unlimited powers to control residents, but only limited powers to interfere in the lives of non-residents. Republican aspirations are therefore more in tune with the all-subjected principle according to which only residents in the territory of the state should be granted rights to political participation.  相似文献   
885.
The practice and development of modern medicine requires large amounts of data, particularly in the domain of cancer. The future of personalized medicine lies neither with “genomic medicine” nor with “precision medicine”, but with “data medicine” (DM) (big data, data mining). The establishment of this DM has required far-reaching changes, to establish four essential elements connecting patients and doctors: biobanks, databases, bioinformatic platforms and genomic platforms. The “transformation” of scientific research areas, such as genetics, bioinformatics and biostatistics, into clinical specialties has generated a new vision of care. Molecular tumor boards (MTB) are one response to these changes and are now providing better access to next-generation sequencing (NGS) and new cancer treatments to patients with inoperable or metastatic cancers, and those for whom the usual treatment has failed. However, MTB face a crucial ethical challenge: maintaining and improving the trust of patients, clinicians, researchers and industry in academic medical centers supported by private or public funding rather than providing genetic data directly to private companies. We believe that, in this era of DM, appropriate modern digital communication networks will be required to maintain this trust and to improve the organization and effectiveness of the system. There is, therefore, a need to reconsider the form and content of informed consent (IC) documents at all academic medical centers and to introduce dynamic and electronic informed consent (e-IC).  相似文献   
886.
The sources of embryos for Embryonic Stem Cell Research (ESCR) include surplus embryos from infertility treatments, and research embryos which are created solely for an ESCR purpose. The latter raises more ethical concerns. In a multi-religious country like Malaysia, ethical discussions on the permissibility of ESCR with regard to the use surplus and research embryos are diversified. Malaysia has formulated guidelines influenced by the national fatwa ruling which allows the use of surplus embryos in ESCR. Input from other main religions is yet to be documented. In light of this, this study addresses (i) the ethical viewpoints of Buddhist, Hindu and Catholic leaders on the permissibility of using surplus and research embryos; and (ii) the moral standpoints of religious leaders towards attaining a consensus on the practice of ESCR in Malaysia. Responses from the religious leaders were obtained via semi-structured, face-to-face interviews. The findings show that generally the Buddhist and Hindu leaders approve the use of surplus embryos. Their responses on the creation of research embryos for ESCR are varied. Meanwhile, the Catholic leaders distinctively objected to ESCR regardless of the embryo sources, referring to it as the destruction of life. Taking into account the diverse views, this study explores the response of the religious leaders for a general consensus wherever possible. The ethical discourse surrounding ESCR in a multi-religious setting offers new perspective, which needs to be explored in a broader global community.  相似文献   
887.
Despite more than 25 years of a requirement for training in the responsible conduct of research (RCR), there is still little consensus about what such training should include, how it should be delivered, nor what constitutes “effectiveness” of such training. This lack of consensus on content, approaches and outcomes is evident in recent data showing high variability in the development and implementation of RCR instruction across universities and programs. If we accept that one of the primary aims of instruction in RCR/research ethics is “to foster a community of social responsibility” (Antes et al. 2009: 398), then it makes sense to consider the research environment itself—where learning one’s science happens where one also engages in social interaction around that science. In order to take the best advantage of that already existing/naturally occurring research environment, the authors, through a deliberative, collaborative, and integrative process, crafted a workshop curriculum meant to arm research faculty with concrete and specific tools to effectively introduce research ethics in the context of the research environment.  相似文献   
888.
In February 2012, the Obama White House endorsed a Privacy Bill of Rights, comprising seven principles. The third, “Respect for Context,” is explained as the expectation that “companies will collect, use, and disclose personal data in ways that are consistent with the context in which consumers provide the data.” One can anticipate the contested interpretations of this principle as parties representing diverse interests vie to make theirs the authoritative one. In the paper I will discuss three possibilities and explain why each does not take us far beyond the status quo, which, regulators in the United States, Europe, and beyond have found problematic. I will argue that contextual integrity offers the best way forward for protecting privacy in a world where information increasingly mediates our significant activities and relationships. Although an important goal is to influence policy, this paper aims less to stipulate explicit rules than to present an underlying justificatory, or normative rationale. Along the way, it will review key ideas in the theory of contextual integrity, its differences from existing approaches, and its harmony with basic intuition about information sharing practices and norms.  相似文献   
889.
This paper is the result of the EMERGING ICT FOR CITIZEN VEILLANCE-workshop organized by the JRC, Ispra, Italy, March 2014. The aim of this paper is to explore how the subject participates in surveillance situations with a particular focus on how users experience everyday tracking technologies and practices. Its theoretical points of departure stem from Surveillance Studies in general and notions of participatory surveillance (Albrechtslund 2008) and empowering exhibitionism (Koskela in Surveill Soc 2(2/3):199–215, 2004) in particular. We apply these theoretical notions on smartphones and its users to investigate the combination of participation and surveillance. Empirically, the paper uses interviews held with urban nightlife visitors to uncover practices of smartphone use. This qualitative and explorative study contributes to the concept of participatory surveillance by discussing to what extent smartphone-users’ actions and motivations can be seen as forms of surveillance and how that influences these actors in a (nightly) public space. We finish by setting out directions for studying mobile technologies of the self.  相似文献   
890.
As one of the best known science narratives about the consequences of creating life, Mary Shelley’s Frankenstein; or, The Modern Prometheus (1818) is an enduring tale that people know and understand with an almost instinctive familiarity. It has become a myth reflecting people’s ambivalent feelings about emerging science: they are curious about science, but they are also afraid of what science can do to them. In this essay, we argue that the Frankenstein myth has evolved into a stigma attached to scientists that focalizes the public’s as well as the scientific community’s negative reactions towards certain sciences and scientific practices. This stigma produces ambivalent reactions towards scientific artifacts and it leads to negative connotations because it implies that some sciences are dangerous and harmful. We argue that understanding the Frankenstein stigma can empower scientists by helping them revisit their own biases as well as responding effectively to people’s expectations for, and attitudes towards, scientists and scientific artifacts. Debunking the Frankenstein stigma could also allow scientists to reshape their professional identities so they can better show the public what ethical and moral values guide their research enterprises.  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