全文获取类型
收费全文 | 2792篇 |
免费 | 417篇 |
国内免费 | 748篇 |
出版年
2024年 | 7篇 |
2023年 | 70篇 |
2022年 | 100篇 |
2021年 | 90篇 |
2020年 | 181篇 |
2019年 | 187篇 |
2018年 | 155篇 |
2017年 | 183篇 |
2016年 | 225篇 |
2015年 | 131篇 |
2014年 | 179篇 |
2013年 | 549篇 |
2012年 | 169篇 |
2011年 | 204篇 |
2010年 | 112篇 |
2009年 | 162篇 |
2008年 | 151篇 |
2007年 | 153篇 |
2006年 | 151篇 |
2005年 | 116篇 |
2004年 | 91篇 |
2003年 | 81篇 |
2002年 | 62篇 |
2001年 | 60篇 |
2000年 | 44篇 |
1999年 | 37篇 |
1998年 | 26篇 |
1997年 | 25篇 |
1996年 | 21篇 |
1995年 | 23篇 |
1994年 | 18篇 |
1993年 | 22篇 |
1992年 | 14篇 |
1991年 | 4篇 |
1990年 | 16篇 |
1989年 | 9篇 |
1988年 | 9篇 |
1987年 | 11篇 |
1986年 | 10篇 |
1985年 | 11篇 |
1984年 | 5篇 |
1983年 | 9篇 |
1982年 | 7篇 |
1981年 | 5篇 |
1980年 | 8篇 |
1979年 | 13篇 |
1978年 | 17篇 |
1977年 | 10篇 |
1976年 | 14篇 |
排序方式: 共有3957条查询结果,搜索用时 31 毫秒
251.
Weidong Cao 《Frontiers of Philosophy in China》2006,1(1):41-50
The main purpose of this essay is not to give a full-scale and systematic exploration of the historical process concerning
the acceptance of Habermas’ works in the Chinese-spoken world but to examine the historical effect of Habermas in the Chinese-spoken
context and try to find a proper way to establish a good relationship between Habermas and the Chinese-spoken world by discussing
the introduction, study, and application of Habermas’ most famous work, The Structural Transformation of the Public Sphere, by Chinese scholars in recent years.
Translated from Xiandai zhexue, 2005:1 相似文献
252.
253.
《大学生主观幸福感量表》的编制 总被引:10,自引:0,他引:10
根据国内外关于主观幸福感的文献和已有的研究经验,编制了大学生主观幸福感问卷。以往大多数研究认为,主观幸福感由生活满意度和情绪体验两个基本成分构成,本研究认为主观幸福感还应包括社会性行为和人际关系等成分。对376名大学生进行初测,通过探索性因素分析,表明大学生主观幸福感由自我满意、家庭满意、消极情绪、积极情绪、精力、生活满意、社会性行为和人际关系8个维度构成,共41个项目。对511名大学生施测41个项目的主观幸福感问卷,进行验证性因素分析,结果表明,上述结构是合理的。 相似文献
254.
大学生学习动机问卷的初步编制 总被引:2,自引:0,他引:2
本研究结合开放式问卷所获资料,在文献研究的基础上建构了大学生学习动机的维度,编制了大学生学习动机问卷,并将之施测于427名大学生。问卷的因素分析结果表明:(1)大学生学习动机归并为求知兴趣、能力追求、声誉获取和利他取向四个维度;(2)自编大学生学习动机问卷的信度和效度指标均达到了心理测量学要求。 相似文献
255.
Antoine Jérusalem 《Philosophical Magazine Letters》2013,93(9):599-609
Owing to their very high strength, nanocrystalline metals have been extensively studied over the recent years. The direct Hall–Petch law, empirically proportioning the material strength to the inverse square root of its grain size has been shown to break down below a grain size of the order of tenths of nanometers. This phenomenon has been widely rationalized as a gradual switch from intragrain mediated deformation mechanisms to grain boundary mediated deformation mechanisms. This transition has been observed in many finite element simulations, despite the intrinsic restriction of necessarily limiting the nanocrystalline representative assembly to only a few grains. Such a limitation is generally overlooked, and its influence on an uniaxial tension test – when compared to a complete sample of millions of grains – ignored. We propose here to quantify the approximation done by considering a finite number of grains by means of a simple analytical model based on the early work of Stevens [R.N. Stevens, Philos. Mag. 23 (1971) p. 265]. The finite element approximation is demonstrated to be relatively good, even down to only three grains in width, and a method to “correct” the stress-strain curves of small representative volumes is proposed. 相似文献
256.
The mechanical softening behaviour of micrometre-scale metals (free-standing metal foils and wires) with decreasing either the geometrical or the microstructural scale (i.e. the smaller, the weaker) has recently been reported. Here, we present a mechanism-based model to understand the softening behaviour, which is based on competition between the effects of surface grain relaxation and the interior grain strengthening effect. The model describes well the yield stress of Cu foils with different ratios of the thickness to grain size. 相似文献
257.
ABSTRACTThe effect of Retrieval Practice refers to the phenomenon that taking a practice test is more effective for learning than re-study, probably due to the benefit from processes underlying successful retrievals during practice. However, it is rarely studied whether other processes (e.g., metacognitive monitoring) during retrieval practice may also play an important role. In two experiments, we examined whether the effectiveness of retrieval was affected by subjects’ confidence in their retrieval success. Subjects studied word-pairs and rated their confidence after each practice test trial (cued-recall in Exp.1, multiple choice in Exp.2), or re-study trial. In both experiments, we observed the classic retrieval practice effect. Moreover, in Exp.2, the benefits differed as a function of subjects’ confidence in their retrieval performance: the effect of retrieval practice only emerged for high-confidence trials with higher than 56% confidence. In summary, the retrieval practice only facilitates the retention of correct answers with high confidence. 相似文献
258.
ABSTRACTAlthough previous research on retrieval practice (RP) has predominantly featured stimuli with discrete right-or-wrong answers, continuous measures offer potentially greater sensitivity in assessing the effects of RP on memory precision. The present study used a colour gradient (125 points ranging from magenta to yellow) as a continuous response variable. The colours of different images were learned through either RP or restudy and either one or three cycles of practice after initial study. On a delayed final test, participants’ memory was assessed for each item’s colour. Participants also created per-item intervals representing the region where they believed the correct colour most likely to have been. We found that repeated rounds of RP enhanced the correspondence between responses and the correct colour. In addition, RP led to participants creating more accurate (correct answers were more likely to be within the participant-specified intervals) and more precise (narrower) intervals relative to restudy, suggesting that RP enhances the precision of memories. 相似文献
259.
260.
Timothy D. Ritchie John J. Skowronski W. Richard Walker Sarah E. Wood 《Memory (Hove, England)》2013,21(4):471-485
Four samples of participants recalled autobiographical memories. While some evidence emerged from regression analyses suggesting that judgements of the amount of detail contained in each memory and judgements of the ease with which events could be recalled were partially independent, the analyses generally showed that these judgements were similarly predicted by various event characteristics (age, typicality, self-importance, emotional intensity at event occurrence, rehearsal types). Co-occurrence frequency data yielded similar conclusions, showing that while ease ratings and detail ratings occasionally diverged, they were more often consistent with each other. Finally, the data also suggested that events that prompted emotional ambivalence were not judged to be more easily recalled, or to contain more detail, than non-ambivalent events. 相似文献