全文获取类型
收费全文 | 16743篇 |
免费 | 1352篇 |
国内免费 | 965篇 |
专业分类
19060篇 |
出版年
2024年 | 30篇 |
2023年 | 256篇 |
2022年 | 236篇 |
2021年 | 265篇 |
2020年 | 548篇 |
2019年 | 581篇 |
2018年 | 551篇 |
2017年 | 659篇 |
2016年 | 661篇 |
2015年 | 419篇 |
2014年 | 567篇 |
2013年 | 1756篇 |
2012年 | 351篇 |
2011年 | 435篇 |
2010年 | 368篇 |
2009年 | 561篇 |
2008年 | 735篇 |
2007年 | 781篇 |
2006年 | 743篇 |
2005年 | 633篇 |
2004年 | 548篇 |
2003年 | 449篇 |
2002年 | 426篇 |
2001年 | 262篇 |
2000年 | 247篇 |
1999年 | 214篇 |
1998年 | 175篇 |
1997年 | 143篇 |
1996年 | 118篇 |
1995年 | 108篇 |
1994年 | 98篇 |
1993年 | 81篇 |
1992年 | 62篇 |
1991年 | 46篇 |
1990年 | 48篇 |
1988年 | 39篇 |
1987年 | 27篇 |
1985年 | 368篇 |
1984年 | 416篇 |
1983年 | 344篇 |
1982年 | 449篇 |
1981年 | 441篇 |
1980年 | 442篇 |
1979年 | 394篇 |
1978年 | 444篇 |
1977年 | 349篇 |
1976年 | 353篇 |
1975年 | 272篇 |
1974年 | 278篇 |
1973年 | 236篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
Cargo two- or three-wheeled vehicles (TTWs), as a new form of micro-mobility, have become a popular mode of urban cargo transportation in China. Cargo TTW riders’ psychological factors and risky behaviors lead to a number of accidents. A questionnaire is designed by comprehensively considering these factors and behaviors of cargo TTW riders that includes eleven risk factors to quantitatively analyze the risky behaviors based on structural equation modeling (SEM). One thousand three hundred nineteen participants reported using cargo TTWs on a questionnaire distributed across the country. The characteristics of riding behavior data are analyzed to verify the three-layer risk theoretical framework of “Psychological factors (Personality traits/specific factors) - Psychological acceptability of risks (confidence/perception/attitude) - Risky behaviors”. The results show that anger has a strong direct effect on riding violations, while normlessness and altruism have a direct effect on riding errors. Workload has a weak but direct effect on risky behaviors, and riding feedback has a weak and mixed effect. In addition, high-risk groups are identified by analysis of variance (ANOVA) with rider population attributes. These quantitative analyses can help guide safety countermeasures to mitigate accidents involving cargo TTWs. 相似文献
932.
Learning processes can be described by adaptive mental (or neural) network models. If metacognition is used to regulate learning, the adaptation of the mental network becomes itself adaptive as well: second-order adaptation. In this paper, a second-order adaptive mental network model is introduced for metacognitive regulation of learning processes. The focus is on the role of multiple internal mental models, in particular, the case of visualisation to support learning of numerical or symbolic skills. The second-order adaptive network model is illustrated by a case scenario for the role of visualisation to support learning multiplication at the primary school. 相似文献
933.
《Psychologie du Travail et des Organisations》2021,27(3):203-215
The purpose of this study was to test the links between self-esteem, the feeling of self-efficacy and the different forms of motivation. It also aimed to understand the mediating effect of the meaning of work between the variables. French work-integrated learning students (n = 471) completed a self-administered online questionnaire. The results showed significant links between self-esteem, perceived self-efficacy, work meaning, and different dimensions of motivation (extrinsic, intrinsic, and amotivation). In addition, the meaning of work played a mediating role in the relationship between self-esteem, perceived self-efficacy, and dimensions of motivation. This study showed the central mechanism of work meaning in work motivation. 相似文献
934.
935.
Marriage practices in the Majority world may differ considerably from dominant cultural ideals in the Minority world of ‘romantic love’ and ‘companionate marriage’ based on monogamous relationships. Similarly, mourning in the ‘Rest’ of the world often diverges from assumptions within Anglophone bereavement studies of a ‘grieving journey’. This paper provides a gendered, spatial, relational analysis of responses to the death of a spouse in Senegal, based on in-depth interviews with Serer women and men in rural and urban communities. A heightened sense of relationality with the deceased surrounded widows' bodies, with permeable boundaries that needed to be contained and “purified” through widowhood-mourning practices in order to restore social cohesion. For men, the space of the home was transformed, sometimes unbearably, by the loss of a wife and mother due to their central role in home-making practices, transforming men's relational being. ‘Embodied relationality’, alongside material constraints, also shaped perspectives on remarriage. The paper reveals the diverse material, embodied, spatial, and often explicitly gendered, ways that the effects of the death of a spouse may be manifested in the experience of the living person and draws attention to the permeable embodied boundaries of ‘relational being’ that encompass the living and the dead. 相似文献
936.
937.
Cognitive inhibition has been suggested to deteriorate in Alzheimer’s disease. While numerous studies with different experimental paradigms found evidence on impaired inhibition in attention and memory, evidence in favour of intact memory inhibition has been reported with regard to the phenomenon of retrieval-induced forgetting (Moulin et al., 2002). Here, we adapted the previously used paradigm in order to reduce the contribution of non-inhibitory processes and examined whether retrieval-induced forgetting could still be observed in a sample of participants with diagnosed Alzheimer’s disease. In contrast to the previous finding, we found that retrieval-induced forgetting only occurred in an age-matched control group. These results suggest that inhibitory deficits in Alzheimer’s disease also generalize to memory inhibition that resolves interference occurring during retrieval, whereas effects of retrieval-induced forgetting may still occur when non-inhibitory causes, such as, blocking by previously retrieved content, are not precluded. 相似文献
938.
A questionnaire study involving white collar workers (n=48) investigated the effects of the threat of retaliation, seriousness of malpractice and occupational status of the observer on the likelihood and method of whistle-blowing chosen. In line with previous whistle-blowing and bystander intervention research, the likelihood of whistle-blowing was greater for serious malpractices and where threatened retaliation was low. The effect of retaliation was only significant for serious white collar malpractices and in every situation internal whistle-blowing was more likely than external. The general likelihood of whistle-blowing was positively correlated with the perception that reporting the malpractice would result in change. 相似文献
939.
DAVID J. HARPER 《Journal of community & applied social psychology》1996,6(4):249-265
In this article it is argued that the attributional literature concerning explanations of poverty is inadequate due to its theoretical presuppositions. It is proposed that a discursive approach is better able to withstand criticism and contribute to a more adequate understanding of poverty accounts. Some examples are given of how a discursive approach might work in practice. 相似文献
940.
Multiple-criteria decision aid almost always requires the use of weights, importance coefficients or even a hierarchy of criteria, veto thresholds, etc. These are importance parameters that are used to differentiate the role devoted to each criterion in the construction of comprehensive preferences. Many researchers have studied the problem of how to assign values to such parameters, but few of them have tried to analyse in detail what underlies the notion of importance of criteria and to give a clear formal definition of it. In this paper our purpose is to define a theoretical framework so as to analyse the notion of the importance of criteria under very general conditions. Within this framework it clearly appears that the importance of criteria is taken into account in very different ways in various aggregation procedures. This framework also allows us to shed new light on fundamental questions such as: Under what conditions is it possible to state that one criterion is more important than another? Are importance parameters of the various aggregation procedures dependent on or independent of the encoding of criteria? What are the links between the two concepts of the importance of criteria and the compensatoriness of preferences? This theoretical framework seems to us sufficiently general to ground further research in order to define theoretically valid elicitation methods for importance parameters. 相似文献