全文获取类型
收费全文 | 1520篇 |
免费 | 230篇 |
国内免费 | 162篇 |
出版年
2024年 | 4篇 |
2023年 | 28篇 |
2022年 | 26篇 |
2021年 | 29篇 |
2020年 | 63篇 |
2019年 | 85篇 |
2018年 | 85篇 |
2017年 | 88篇 |
2016年 | 79篇 |
2015年 | 51篇 |
2014年 | 87篇 |
2013年 | 189篇 |
2012年 | 77篇 |
2011年 | 64篇 |
2010年 | 49篇 |
2009年 | 90篇 |
2008年 | 90篇 |
2007年 | 115篇 |
2006年 | 62篇 |
2005年 | 85篇 |
2004年 | 86篇 |
2003年 | 73篇 |
2002年 | 62篇 |
2001年 | 29篇 |
2000年 | 35篇 |
1999年 | 23篇 |
1998年 | 15篇 |
1997年 | 19篇 |
1996年 | 13篇 |
1995年 | 9篇 |
1994年 | 7篇 |
1993年 | 9篇 |
1992年 | 6篇 |
1991年 | 6篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 7篇 |
1987年 | 3篇 |
1986年 | 3篇 |
1985年 | 4篇 |
1983年 | 4篇 |
1982年 | 5篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1979年 | 6篇 |
1978年 | 9篇 |
1977年 | 2篇 |
1976年 | 6篇 |
1975年 | 7篇 |
1973年 | 2篇 |
排序方式: 共有1912条查询结果,搜索用时 15 毫秒
171.
Direct-to-consumer (DTC) genetic testing is an increasingly available option among individuals searching for information about their health risk factors and ancestry. This study is one of the first to examine predictors of interest in DTC genetic testing. Participants read one of the three types of information about DTC genetic testing (positive only, negative only or both) and reported perceptions of and intentions to pursue testing. The information which people read, their perceptions of the benefits of testing, their perceptions of the barriers to testing and anticipated regret predicted intentions to undergo testing. Interestingly, people who read both positive and negative information did not differ from people who read only negative information in their intentions to pursue testing. We discuss the implications of these findings for predicting interest in this relatively new type of genetic testing and for designing interventions to encourage (or discourage) testing. 相似文献
172.
The diffusion dynamics in water of Brownian particles constituted by noble-metal nanoclusters has been treated by a transport model across a limiting surface that separates two layers of the same fluid, having different values of density and temperature. This model, developed by Parrondo and adapted by Streater, has recently been shown to be useful in several situations like ours by the work of Grillo et al. By this approach, which introduces a one-dimensional vertical adiabatic potential produced by density gradients governing the net current of particles across the limiting surface, we are able to explain the mass and thermal energy transport, which rapidly restores the equilibrium conditions when they are perturbed by laser ablation of a noble-metal target vertically submerged in water. Experimentally, the laser ablation of noble-metal targets has been performed by irradiating pure metal sheets submerged in water with a pulsed Nd:YAG laser at 500 mJ cm?2 fluency for 5 min and pulses of duration on the nanosecond timescale. 相似文献
173.
Agnieszka Pietraszkiewicz 《Australian journal of psychology》2013,65(3):188-194
The present study tested the hypothesis that a threat of a just world belief intensifies experience of schadenfreude (i.e., pleasure at another's misfortune). The participants read scenarios which were designed to threaten or maintain their just world belief. Subsequently, they were transferred to an online magazine presenting funny stories about other peoples' failures. As presumed, the participants exposed to the threat of just world belief spent more time on reading. These results confirmed the existence of a link between just world threat and schadenfreude. 相似文献
174.
Norman Doe 《International Journal for the Study of the Christian Church》2013,13(2):93-111
An important recent development in worldwide Anglicanism is the emergence over recent years of a project to articulate the principles of canon law common to the churches of the Anglican Communion. This project seeks to express the juridical character of Anglicanism from a global perspective, not only to underscore the many fundamental values that Anglicans share in terms of their polity, ministry, doctrine, liturgy, rites and property, going to the very roots of Anglican identity but, also, as a concrete resource for other churches in ecumenical dialogue with Anglicans. This article traces the development of the so-called ius commune project, describes the methodological challenges which it faces and, the process of producing a draft. It also seeks to compare the project with the juridical experiences of other international ecclesial communities and, briefly, to place the project in the context of the debate about the adoption of an Anglican Covenant, an initiative proposed by the Lambeth Commission in 2004. 相似文献
175.
Marcus Hutter John W. Lloyd Kee Siong Ng William T.B. Uther 《Journal of Applied Logic》2013,11(4):386-420
Automated reasoning about uncertain knowledge has many applications. One difficulty when developing such systems is the lack of a completely satisfactory integration of logic and probability. We address this problem directly. Expressive languages like higher-order logic are ideally suited for representing and reasoning about structured knowledge. Uncertain knowledge can be modeled by using graded probabilities rather than binary truth values. The main technical problem studied in this paper is the following: Given a set of sentences, each having some probability of being true, what probability should be ascribed to other (query) sentences? A natural wish-list, among others, is that the probability distribution (i) is consistent with the knowledge base, (ii) allows for a consistent inference procedure and in particular (iii) reduces to deductive logic in the limit of probabilities being 0 and 1, (iv) allows (Bayesian) inductive reasoning and (v) learning in the limit and in particular (vi) allows confirmation of universally quantified hypotheses/sentences. We translate this wish-list into technical requirements for a prior probability and show that probabilities satisfying all our criteria exist. We also give explicit constructions and several general characterizations of probabilities that satisfy some or all of the criteria and various (counter)examples. We also derive necessary and sufficient conditions for extending beliefs about finitely many sentences to suitable probabilities over all sentences, and in particular least dogmatic or least biased ones. We conclude with a brief outlook on how the developed theory might be used and approximated in autonomous reasoning agents. Our theory is a step towards a globally consistent and empirically satisfactory unification of probability and logic. 相似文献
176.
177.
本文对判断和决策研究领域所发现的跨文化差异进行了回顾。鉴于大多数判断和决策的跨文化研究都集中于对亚洲和西方文化的比较,本文也主要关注这方面的研究发现。具体来说,本文回顾了在概率判断及信心、风险知觉、冒险行为、消费者行为以及经济判断和决策中所存在的跨文化差异。综述结果表明尽管亚洲人和西方人的判断和决策行为存在很大的跨文化差异,研究也发现了显著的文化内差异。目前关于判断和决策的跨文化差异的研究还相对匮乏,未来还需要更多的研究来进一步了解判断和决策行为的跨文化差别及机制。 相似文献
178.
Jeff Astley 《Mental health, religion & culture》2013,16(9):975-978
This brief piece relates Edward Bailey's concept of implicit religion, together with some themes from the papers published in this special issue, to Astley's concept of ordinary theology. In particular, it attends to their different, but overlapping, focal concerns and their shared emphasis on a spiritual core of personal meaningfulness. 相似文献
179.
Zeeshan Butt 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2013,20(5):642-655
ABSTRACT The Informant Questionnaire on Cognitive Decline (IQCODE) is a formal informant report instrument, originally developed by Jorm and Jacomb (1989; Psychological Medicine, 19(4), 1015). The goal of the present study was to evaluate the range of cognitive decline in which the IQCODE is most sensitive, using item response theory (IRT). Existing data (N = 740) from a sample of community-dwelling older adults was used for this purpose. A 2-parameter model estimating item difficulty and discrimination fit the data best. Additionally, the IQCODE provided the most psychometric information in the range of ?0.5 < θ < 1.5, with peak information obtained at approximately θ = 0.4. Based on individuals' latent score (θ) estimates, items on the IQCODE are adequate for use as a screening tool for dementia. Results of the item calibration may be useful for targeted assessment needs, such as the development of short forms. 相似文献
180.
Andrew Sneddon 《Philosophical explorations》2013,16(1):41-53
Internalists argue that there is a necessary connection between motivation and moral judgment. The examination of cases plays an important role in philosophical debate about internalism. This debate has focused on cases concerning the failure to act in accordance with a moral judgment, for one reason or another. I call these failure cases. I argue that a different sort of case is also relevant to this debate. This sort of case is characterized by (1) moral judgment and (2) behavior that accords with the content of the moral judgment but that has been performed not because of the moral judgment. Instead it is due to some other source of motivation. I call these alternative motivation cases. I distinguish two sorts of alternative motivation cases, and I argue that externalists have natural explanations of these cases. By contrast, extant internalist accounts of failure cases are inadequate when applied to alternative motivation cases. 相似文献