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   2251篇
  免费   268篇
  国内免费   228篇
  2024年   6篇
  2023年   75篇
  2022年   27篇
  2021年   78篇
  2020年   115篇
  2019年   117篇
  2018年   118篇
  2017年   122篇
  2016年   128篇
  2015年   78篇
  2014年   109篇
  2013年   303篇
  2012年   54篇
  2011年   59篇
  2010年   80篇
  2009年   82篇
  2008年   101篇
  2007年   127篇
  2006年   133篇
  2005年   125篇
  2004年   101篇
  2003年   68篇
  2002年   76篇
  2001年   53篇
  2000年   61篇
  1999年   55篇
  1998年   37篇
  1997年   48篇
  1996年   26篇
  1995年   33篇
  1994年   16篇
  1993年   11篇
  1992年   14篇
  1991年   15篇
  1990年   19篇
  1989年   13篇
  1988年   16篇
  1987年   12篇
  1986年   4篇
  1985年   7篇
  1984年   5篇
  1983年   2篇
  1981年   1篇
  1980年   2篇
  1979年   1篇
  1978年   4篇
  1977年   4篇
  1976年   3篇
  1975年   3篇
排序方式: 共有2747条查询结果,搜索用时 31 毫秒
911.
吕耀怀 《伦理学研究》2005,(1):68-71,83
在信息伦理学领域 ,存在着两种不同的研究取向 :有些学者将信息伦理学作为一门非规范的伦理学来研究 ,而另一些学者则偏重于信息伦理学的规范性质。信息伦理学作为一门规范学科 ,应当研究不同类型的信息活动中已经存在或可能发生的伦理问题 ,而不能成为计算机伦理学、媒体伦理学、生物信息伦理学、网络伦理学的集装箱。规范的信息伦理学可以参考义务论、美德论、效果论的分析框架 ,而且要综合运用多种学科的方法。各国的信息伦理学有本土化的问题 ,但在全球性的信息沟通中 ,应当实现不同的信息伦理学的整合。  相似文献   
912.
913.
Bronislaw Szerszynski's Nature, Technology and the Sacred (2005) offers a fresh look into the historical, cultural, and political implications of technology use in our contemporary situation. By challenging the standard interpretation of the secularization thesis, the book opens the door to a new kind of postmodern ordering of the sacred, which includes our ever‐developing perception of the environment and our ongoing use of technology. In my discussion of the text, I suggest that Szerszynski's argument could have been furthered by exploring the role played by both imagination and myth in creating the postmodern sacred that he describes. I argue that by giving consideration to Friedrich Dessauer's Christian theology of technology and the mythical imagination of contemporary science fiction literature and film, a more explicitly religious dimension of technology can be allowed to emerge in the form of the technological imaginary.  相似文献   
914.
Stanley A. Klein 《Zygon》2006,41(3):567-572
Abstract. Lothar Schäfer has written a poetic tribute pointing out the relevance of quantum theory to religious beliefs. Two items in his article trouble me greatly. First are the excessive claims about the relevance of quantum mechanisms for the creation and evolution of life. Schäfer's claim that “everything that can happen must happen” can be dangerously misleading. The quantum rules predict that most outcomes have a near‐zero chance of occurring. Although “anything can happen” can be a wonderful metaphor for living life, it can be dangerous if taken literally. It can also be misleading when applied to Darwinian mechanisms. My second trouble was with Schäfer's desire to extract moral values from quantum principles in a literalist manner. Extracting ethics from science has always been problematic. Luckily, Schäfer provides balance to these objections by including many wonderful passages that in my opinion correctly point out how quantum theory should change the way we conceive of our place in the universe. I list twelve points in which the quantum ontology differs from our normal Newtonian ontology. Awareness of these aspects is typically missing from our usual appreciation of nature, so Schäfer's poetry on a number of these points is well appreciated.  相似文献   
915.
Sjoerd L. Bonting 《Zygon》2006,41(3):713-726
Abstract. The theology of the Third Person of the Trinity, the Holy Spirit, is not only a rather neglected but also a very diffuse subject. The neglect stems from the priority that was given in the early centuries to Christology. The diffuseness of pneumatology may well be a result of the bewildering variety of ways in which “spirit” or “Spirit” (Hebrew ruach, Greek pneuma) appears in the Bible. I attempt to bring the various activities ascribed to the Spirit under one heading, transmission of information, and then to see what can be learned from modern science about the role of the Spirit in creation. I suggest a distinct role of the Spirit in creation, jointly with but different from that of the Logos. Other occasions of a concerted action of Spirit and Logos are seen in the birth of Christ and the eschatological event. All of this leads to a trinitarian definition of creation.  相似文献   
916.
This study attempts to identify the scientifi c, philosophical and psychoanalytic origins of Bion's work, and includes an organization of these in a comprehensive and synthetic way with the help of a synoptic table. Investigation has revealed Bion's scientifi c orientation, fed by classical and modern authors‐notably, Locke, Hume, Kant, Sylvester and Cayley, Poincaré, Heisenberg, and the German Romantics. Bion was able to rescue certain transcendent aspects of human, and also of Freudian, knowledge that had largely fallen into neglected obscurity. He made an original use of new verbal expressions related to the immaterial facts of psychic reality, the unconscious and the id. The method involves a search for counterparts in reality with two kinds of evidential source: some works and their authors have appeared ipsis litteris in Bion's work. In those situations where Bion does not cite the sources, the study has been able to establish connections with the lengthy marginal notes which Bion left in the texts of the books from his library.  相似文献   
917.
Logistic Approximation to the Normal: The KL Rationale   总被引:1,自引:0,他引:1  
A rationale is proposed for approximating the normal distribution with a logistic distribution using a scaling constant based on minimizing the Kullback–Leibler (KL) information, that is, the expected amount of information available in a sample to distinguish between two competing distributions using a likelihood ratio (LR) test, assuming one of them is true. The new constant 1.749, computed assuming the normal distribution is true, yields an approximation that is an improvement in fit of the tails of the distribution as compared to the minimax constant of 1.702, widely used in item response theory (IRT). The minimax constant is by definition marginally better in its overall maximal error. It is argued that the KL constant is more statistically appropriate for use in IRT. The author would like to thank Sebastian Schreiber for his generous assistance with this project.  相似文献   
918.
Computerized adaptive testing under nonparametric IRT models   总被引:1,自引:0,他引:1  
Nonparametric item response models have been developed as alternatives to the relatively inflexible parametric item response models. An open question is whether it is possible and practical to administer computerized adaptive testing with nonparametric models. This paper explores the possibility of computerized adaptive testing when using nonparametric item response models. A central issue is that the derivatives of item characteristic Curves may not be estimated well, which eliminates the availability of the standard maximum Fisher information criterion. As alternatives, procedures based on Shannon entropy and Kullback–Leibler information are proposed. For a long test, these procedures, which do not require the derivatives of the item characteristic eurves, become equivalent to the maximum Fisher information criterion. A simulation study is conducted to study the behavior of these two procedures, compared with random item selection. The study shows that the procedures based on Shannon entropy and Kullback–Leibler information perform similarly in terms of root mean square error, and perform much better than random item selection. The study also shows that item exposure rates need to be addressed for these methods to be practical. The authors would like to thank Hua Chang for his help in conducting this research.  相似文献   
919.
成人性用品研发的历史在我国源远流长。明代随着商品经济的发展,愈益刺激了人们追求享乐的欲望。男女对性爱满意度的关注,催生了民间医家在继承传统春药的基础上,积极探索开发各种适应社会需要的成人性药品,并以著作的形式加以推广普及,性药品的开发也反映了明代医学的发展。  相似文献   
920.
医患关系的博弈分析   总被引:21,自引:5,他引:16  
医患关系是医疗中最基本最重要的关系,也是最复杂的人际关系,建立良好的医患关系是保证医疗工作顺利进行的必备条件。但是这种关系从开始就是有矛盾的,在信息不对称的情况下分析医患关系的博弈情况及其原因,发现医患关系的核心是信任,它为创造和谐医患关系提出对策,并能促进构建和谐医患关系。  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