全文获取类型
收费全文 | 5738篇 |
免费 | 229篇 |
国内免费 | 2篇 |
出版年
2020年 | 73篇 |
2019年 | 79篇 |
2018年 | 97篇 |
2017年 | 97篇 |
2016年 | 103篇 |
2015年 | 78篇 |
2014年 | 118篇 |
2013年 | 601篇 |
2012年 | 155篇 |
2011年 | 203篇 |
2010年 | 122篇 |
2009年 | 146篇 |
2008年 | 156篇 |
2007年 | 188篇 |
2006年 | 148篇 |
2005年 | 151篇 |
2004年 | 156篇 |
2003年 | 156篇 |
2002年 | 178篇 |
2001年 | 83篇 |
2000年 | 67篇 |
1999年 | 73篇 |
1998年 | 94篇 |
1997年 | 107篇 |
1996年 | 81篇 |
1995年 | 82篇 |
1994年 | 81篇 |
1993年 | 103篇 |
1992年 | 93篇 |
1991年 | 71篇 |
1990年 | 66篇 |
1989年 | 73篇 |
1988年 | 69篇 |
1987年 | 78篇 |
1986年 | 63篇 |
1985年 | 62篇 |
1984年 | 82篇 |
1983年 | 82篇 |
1982年 | 93篇 |
1981年 | 82篇 |
1980年 | 91篇 |
1979年 | 79篇 |
1978年 | 103篇 |
1977年 | 99篇 |
1976年 | 84篇 |
1975年 | 106篇 |
1974年 | 84篇 |
1973年 | 60篇 |
1972年 | 53篇 |
1971年 | 57篇 |
排序方式: 共有5969条查询结果,搜索用时 15 毫秒
801.
802.
803.
804.
The paper examines constraints and preferences employed by people in learning decision rules from preclassified examples. Results from four experiments with human subjects were analyzed and compared with artificial intelligence (AI) inductive learning programs. The results showed the people's rule inductions tended to emphasize category validity (probability of some property, given a category) more than cue validity (probability that an entity is a member of a category given that it has some property) to a greater extent than did the AI programs. Although the relative proportions of different rule types (e.g., conjunctive vs. disjunctive) changed across experiments, a single process model provided a good account of the data from each study. These observations are used to argue for describing constraints in terms of processes embodied in models rather than in terms of products or outputs. Thus AI induction programs become candidate psychological process models and results from inductive learning experiments can suggest new algorithms. More generally, the results show that human inductive generalizations tend toward greater specificity than would be expected if conceptual simplicity were the key constraint on inductions. This bias toward specificity may be due to the fact that this criterion both maximizes inferences that may be drawn from category membership and protects rule induction systems from developing over-generalizations. 相似文献
805.
806.
This article presents the results of an experiment which investigated elementary school children's explanations of the day/night cycle. First, third, and fifth grade children were asked to explain certain phenomena, such as the disappearance of the sun during the night, the disappearance of stars during the day, the apparent movement of the moon, and the alteration of day and night. The results showed that the majority of the children in our sample used in a consistent fashion a small number of relatively well-defined mental models of the earth, the sun, and the moon to explain the day/night cycle. These mental models of the day/night cycle were empirically accurate, logically consistent and revealed some sensitivity on the part of the children to issues of simplicity of explanation. The younger children formed Initial mental models which provided explanations of the day/night cycle based on everyday experience (e.g., the sun goes down behind mountains, clouds cover up the sun). The older children constructed synthetic mental models (e.g., the sun and the moon revolve around the stationary earth every 24 hours; the earth rotates in an up/down direction and the sun and moon are fixed on opposite sides) which represented attempts to synthesize the culturally accepted view with aspects of their Initial models. A few of the older children appeared to have constructed a mental model of the day/night cycle similar to the scientific one. A theoretical framework is outlined which explains the formation of initial, synthetic, and scientific models of the day/night cycle in terms of the reinterpretation of a hierarchy of constraints, some of which are present early in the child's life, and others which emerge later out of the structure of the acquired knowledge. 相似文献
807.
808.
Results from meta-analyses have been widely cited to defend the validity of the Rorschach. However, the meta-analyses have been flawed. For example, one meta-analysis included results that were obtained by calculating correlations but not results that were obtained by conducting t tests or analyses of variance. When we reanalyzed the data from the most widely cited meta-analysis (Parker, Hanson, & Hunsley, 1988), we found that for confirmatory studies (also called convergent-validity studies), the Minnesota Multiphasic Personality Inventory (MMPI) explained 23% to 30% of the variance, whereas the Rorschach explained only 8% to 13% of the variance. These results indicate that the Rorschach is not as valid as the MMPI. 相似文献
809.
The demand that epistemic support be explicated as rational compulsion has consistently undermined the dialogue between theology and science. Rational compulsion entails too restrictive a form of epistemic support for most scientific theorizing, let alone interdisciplinary dialogue. This essay presents a less restrictive form of epistemic support, explicated not as rational compulsion but as explanatory power. Once this notion of epistemic support is developed, a genuinely productive interdisciplinary dialogue between theology and science becomes possible. This essay closes by sketching how the Big Bang model from cosmology and the Christian doctrine of Creation can be viewed as supporting each other. 相似文献
810.
William E. Carroll 《Zygon》1998,33(2):271-274
Cornell College in Mount Vernon, Iowa, has established a new interdisciplinary program in science and religion. One of the features of this program is an undergraduate major in science and religion that requires substantial course work in at least one of the natural sciences as well as course work in philosophy, religion, and history. As a result of a grant from the John Templeton Foundation, Cornell College will offer a special course, God and Physics: From Aquinas to Quantum Mechanics (April 1998), and will sponsor an international symposium on creation and contemporary cosmology (April 1999). Opportunities exist for interested scholars to come to Cornell as Templeton Visiting Fellows in order to participate in these activities. 相似文献