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   2971篇
  免费   225篇
  国内免费   286篇
  2024年   9篇
  2023年   77篇
  2022年   78篇
  2021年   103篇
  2020年   174篇
  2019年   158篇
  2018年   165篇
  2017年   179篇
  2016年   186篇
  2015年   119篇
  2014年   144篇
  2013年   464篇
  2012年   88篇
  2011年   129篇
  2010年   66篇
  2009年   119篇
  2008年   102篇
  2007年   108篇
  2006年   106篇
  2005年   111篇
  2004年   113篇
  2003年   90篇
  2002年   71篇
  2001年   65篇
  2000年   62篇
  1999年   39篇
  1998年   40篇
  1997年   33篇
  1996年   26篇
  1995年   38篇
  1994年   24篇
  1993年   12篇
  1992年   10篇
  1991年   14篇
  1990年   11篇
  1989年   12篇
  1988年   9篇
  1987年   13篇
  1986年   9篇
  1985年   10篇
  1984年   19篇
  1983年   9篇
  1982年   13篇
  1981年   8篇
  1980年   7篇
  1979年   16篇
  1977年   4篇
  1976年   4篇
  1975年   7篇
  1974年   4篇
排序方式: 共有3482条查询结果,搜索用时 15 毫秒
191.
Bulimia nervosa (BN) is characterized by a pattern of binge eating and compensatory behaviors as well as an overemphasis on body weight and shape in self-evaluation. Although cognitive behavioral therapy (CBT) is efficacious, recent reviews suggest that only 30% of patients reach abstinence at posttreatment. One potential reason for these poor outcomes is that CBT fails to adequately reduce elevated negative affect (NA) and shape and weight concern, which have been shown to be correlated with poorer treatment outcomes in BN. Therefore, novel treatment components that focus on improving NA and shape and weight concern are needed in order to enhance outcomes. Promoting physical activity (PA) is a promising avenue through which to reduce NA and improve body image in healthy individuals, other clinical populations (e.g., individuals with depression or anxiety), and individuals with eating disorders. While prescribing PA for individuals with BN has been controversial (due to concerns that exercise maybe be used to compensate for binge episodes or become driven or compulsive), this approach may have many benefits, including promoting healthy lifetime exercise habits that reduce likelihood of relapse through the improvement of emotion regulation skills and weight regulation.Given the promise of PA for targeting key maintenance factors of BN, we developed a 12-session healthy PA promotion intervention for BN and tested initial feasibility, acceptability, and preliminary target engagement in an iterative case series design (n = 3). The treatment provided cognitive-behavioral skills designed to identify, practice, and achieve behavioral goals while asking patients to engage in up to 150 minutes of moderate-to-vigorous PA per week, which was preplanned during each session with the client’s therapist.Results suggested that the healthy PA promotion intervention was both feasible and acceptable to deliver. In addition, the intervention resulted in a clinically significant decrease in BN symptom frequency in each participant. Further, participants showed clinically significant decreases in NA and shape and weight concern.The current study demonstrates that healthy PA interventions can have beneficial effects on BN symptoms, NA, and shape and weight concern. However, due to the small sample size, conclusions must be treated with caution. Future research should investigate additional approaches for promoting healthy PA and include a larger sample in order to further test initial efficacy of this treatment approach.  相似文献   
192.
This driving simulator study, conducted as a part of Horizon2020-funded L3Pilot project, investigated how different car-following situations affected driver workload, within the context of vehicle automation. Electrocardiogram (ECG) and electrodermal activity (EDA)-based physiological metrics were used as objective indicators of workload, along with self-reported workload ratings. A total of 32 drivers were divided into two equal groups, based on whether they engaged in a non-driving related task (NDRT) during automation (SAE Level 3) or monitored the drive (SAE Level 2). Drivers in both groups were exposed to two counterbalanced experimental drives, lasting ∼ 18 min each, of Short (0.5 s) and Long (1.5 s) Time Headway conditions during automated car-following (ACF), which was followed by a takeover that happened with or without a lead vehicle. Results showed that driver workload due to the NDRT was significantly higher than both monitoring the drive during ACF and manual car-following (MCF). Furthermore, the results indicated that a lead vehicle maintain a shorter THW can significantly increase driver workload during takeover scenarios, potentially affecting driver safety. This warrants further research into understanding safe time headway thresholds to be maintained by automated vehicles, without placing additional cognitive or attentional demands on the driver. Our results indicated that ECG and EDA signals are sensitive to variations in workload, which warrants further investigation on the value of combining these two signals to assess driver workload in real-time, to help future driver monitoring systems respond appropriately to the limitations of the driver, and predict their performance in the driving task, if and when they have to resume manual control of the vehicle after a period of automated driving.  相似文献   
193.
From a sport and exercise psychology perspective, both the actual and perceived physical fitness become important for motivation towards physical activity and persistent physical activity in children no later than middle childhood (Stodden et al., 2008). To date, the effects of actual and perceived physical fitness have been investigated from a variable-centered approach (Jekauc et al., 2017). However, within this approach, the accuracy of the perceived physical fitness remains unconsidered. As actual and perceived physical fitness levels can be divergent, especially in children due to greater egocentricity and hence less comparison processes (Harter, 2006), also the accuracy of perceived physical fitness should be considered.In total, 462 children from 3rd and, approximately nine months later, from 4th grade participated in this study (Mage = 8.79 years). Third-grade students were assessed on their actual physical fitness, perceived physical fitness, and physical activity. In fourth grade, students were asked to fill out questionnaires that assess motivational regulations and physical activity. Polynomial regressions with response surface analyses were conducted to analyze main effects and accuracy effects of actual and perceived physical fitness on motivation and physical activity. Analyses revealed that children with higher actual and perceived physical fitness levels show greater autonomous motivation, higher current physical activity levels and higher physical activity levels nine months later. In addition, children who perceive their physical fitness more accurately show more current physical activity. Results indicate that the interplay between actual and perceived physical fitness does not only have an effect on physical activity but also on autonomous motivation, which is a predictor for long-term physical activity. Therefore, intervention should focus on the promotion of actual and perceived physical fitness. In addition, the ability to accurately assess fitness should be promoted in this age group.  相似文献   
194.
Using the example of the defense and security sector at the Innovation and Leadership in Aerospace aviation fair in Berlin, this paper interrogates how the presentation of weapons technologies at German security and aviation fairs produces a/effects that influence the body and serve to legitimize political decisions. It examines to what extent the body becomes the site of geopolitical negotiation via affective atmospheres and how different scales interact within this process. First, I argue that affective connections between weapons technologies and spectators are essential for legitimizing warfare technologies. Second, I argue that affects of weapons technologies are subject to ambivalence and ambiguity, and that they are to be understood as entangled with other affects in the same body. Third, I argue that affects become effective across material and spatial scales. Drawing on geographic work on affective atmospheres, debates in intimate geopolitics and feminist science and technology studies, the paper contributes to critical geopolitics by unpacking the role of affective dimensions in naturalizing the development and acquisition of weapons technologies. In doing so, it also contributes to debates on the methodological operationalization of theories of affect and to emotional geographies of (in)security.  相似文献   
195.
While much of literature on place attachment describes it as an affective bond between a (young) person and place, with positive psychosocial consequences such as identification, rootedness and belonging, some authors are cautious and stress that an enhanced attachment to place, termed “territoriality”, may have negative consequences such as hostility towards outsiders and a sense of non-belonging elsewhere. In this paper, I ask how we should understand this difference and how the analysis of young people's emotional geographies of (in)security can bring light to this question. The paper finds that emotional geographies of (in)security are instrumental in understanding how a “positive” attachment to place may lead to a “negative” attachment to territory, how some young people emotionally attach to places and some are inclined to claim these places against outsiders (and also at the expense of other members of the community). This explicit appropriation of public spaces in the home neighbourhood is co-constituted by feeling secure inside and insecure outside the area. Territoriality may be a response to or an expression of ontological insecurity and of the inner unease that prompts them to strange avoidance and contorted strategies for manipulating spaces and setting boundaries designed to secure the self.  相似文献   
196.
197.
In this paper the city of Copenhagen is used as a starting point to highlight some critical historical events, both concerning the exchange of ideas between the physicist Wolfgang Pauli and C.G. Jung and the history of psychotherapy in Scandinavia. Pauli's years in Copenhagen under the influence of Niels Bohr and his philosophy prepared him mentally to receiveC.G. Jung's ideas. The paper also recounts the one occasion that Jung was in Scandinavia, attending the 9th conference of the General Medical Society for Psychotherapy in Copenhagen, just before going to New York in 1937 to give his final seminars on Pauli's dreams. The reason for focusing on these particular events is that they also constitute part of the history of the reception of psychodynamic psychology in Sweden and Scandinavia.  相似文献   
198.
199.
Identity is constantly constructed and reconstructed. It may be assumed that there are six fundamental motivational goals according to which it is organized: self‐esteem, self‐efficacy, continuity, distinctiveness, belonging, and meaning (Vignoles, 2011 ). Moreover, identity is shaped by its dialogical nature (Hermans, 2003 ; van Halen & Janssen, 2004 ). The longitudinal study was conducted to examine both the motivational and the dialogical basis of identity structure dynamics. The results showed that the more the identity element was connected with a sense of continuity and the more dialogical it was, the greater the perceived centrality of this element was after two months. Furthermore, the more the identity element satisfied the self‐esteem and belonging motives, the more positive was the affect ascribed to it. In the behavioral domain of identity, participants more strongly manifested those identity aspects that were earlier rated as more dialogical and satisfying the motive of belonging. The results showed that the motivational underpinnings of identity along with its dialogical nature explain changes in identity structure.  相似文献   
200.
The process that community based participatory research (CBPR) implementation takes in indigenous community contexts has serious implications for health intervention outcomes and sustainability. An evaluation of the Elluam Tungiinun (Towards Wellness) Project aimed to explore the experience of a Yup'ik Alaska Native community engaged within a CBPR process and describe the effects of CBPR process implementation from an indigenous community member perspective. CBPR is acknowledged as an effective strategy for engaging American Indian and Alaska Native communities in research process, but we still know very little about the experience from a local, community member perspective. What are the perceived outcomes of participation in CBPR from a local, community member perspective? Qualitative methods were used to elicit community member perspectives of participation in a CBPR process engaged with one Yup'ik community in southwest Alaska. Results focus on community member perceptions of CBPR implementation, involvement in the process and partnership, ownership of the project with outcomes observed and perceived at the community, family and individual levels, and challenges. A discussion of findings demonstrates how ownership of the intervention arose from a translational and indigenizing process initiated by the community that was supported and enhanced through the implementation of CBPR. Community member perspectives of their participation in the research reveal important process points that stand to contribute meaningfully to implementation science for interventions developed by and for indigenous and other minority and culturally diverse peoples.  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