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   4240篇
  免费   267篇
  国内免费   84篇
  2024年   12篇
  2023年   67篇
  2022年   52篇
  2021年   92篇
  2020年   131篇
  2019年   116篇
  2018年   206篇
  2017年   217篇
  2016年   188篇
  2015年   136篇
  2014年   173篇
  2013年   621篇
  2012年   346篇
  2011年   351篇
  2010年   215篇
  2009年   112篇
  2008年   296篇
  2007年   227篇
  2006年   228篇
  2005年   121篇
  2004年   105篇
  2003年   79篇
  2002年   75篇
  2001年   34篇
  2000年   59篇
  1999年   34篇
  1998年   32篇
  1997年   20篇
  1996年   20篇
  1995年   9篇
  1994年   26篇
  1993年   15篇
  1992年   12篇
  1991年   14篇
  1990年   18篇
  1989年   16篇
  1988年   10篇
  1987年   12篇
  1986年   4篇
  1985年   7篇
  1984年   8篇
  1983年   4篇
  1981年   5篇
  1979年   6篇
  1978年   5篇
  1975年   5篇
  1974年   8篇
  1970年   4篇
  1968年   5篇
  1966年   4篇
排序方式: 共有4591条查询结果,搜索用时 93 毫秒
271.
272.
The survival processing paradigm has recently drawn attention to the functional aspects of memory functioning. The survival effect, characterized by better memory performance when information is processed in a survival context, as compared with a variety of controls, is now well established in healthy populations. The main goal of this study was to test this paradigm in a group of cognitively impaired older adults and elderly; their data were compared to the data obtained in a group of healthy older adults and elderly. Seventeen cognitively impaired and 17 healthy participants performed a typical survival task using a blocked within‐subject design procedure and free recall as the memory test. The healthy older adults and elderly performed better on this memory task as well as on other tests included in a neuropsychological evaluation protocol. Importantly, both groups benefited from survival processing. These results provide further support for the power of survival processing, extending this phenomenon to cognitively impaired aging participants. The data also suggest that the survival effect is not simply a form of deep processing. Potential applied considerations are presented.  相似文献   
273.
Earlier studies have shown that feelings of guilt appear to be involved in the burnout process. However, the exact nature of the relationship between burnout, feelings of guilt, and tobacco and alcohol use is unclear. The purpose of this study was to analyze the role of feelings of guilt in the relationship between burnout and the consumption of tobacco and alcohol. Role conflict, Role clarity, and Feedback were included as predictors of burnout. The sample of this cross‐sectional study consisted of 260 Chilean administration and customer service workers. Hypotheses were tested using a path model. The hypothesized model (i.e., Indolence to guilt to tobacco/alcohol use) showed an adequate data fit, including a mediator role of feelings of guilt in the relationship between burnout and alcohol use. The results of this study recommending taking into consideration the evaluation of feelings of guilt as a symptom of burnout in order to develop a more reliable diagnosis of burnout syndrome and its consequences.  相似文献   
274.
Framing effects on emotional responses in a green electricity choice are investigated in a survey of a random sample of 655 Swedish residents. The results show that overall more positive and less negative emotions are experienced for a promotion frame (“choosing green electricity and paying more”) than for a prevention frame (“not choosing green electricity and paying less”). Value orientation is shown to moderate the framing effect in that for the promotion frame, individuals with a self‐transcendence value orientation show the most positive and least negative emotion, whereas for the prevention frame, individuals with a self‐enhancement value orientation show the most positive and least negative emotion. Emotional responses are further shown to mediate the relationship between value orientation and intention to purchase eco‐labeled electricity.  相似文献   
275.
The validity of the 34-item and shortened versions of the Body Shape Questionnaire (BSQ) has been evaluated in various languages. To date, only the validity of the 34-item French BSQ scale has been tested in a nonclinical sample. This study assessed the reliability and validity of the 34-item French BSQ and 7 shortened versions in clinical and nonclinical samples. The 34-item French BSQ was administered to 159 obese women with and without binge eating disorders and to 1,169 female undergraduate students. The results suggested that the BSQ–8B was the best French BSQ to use in nonclinical and clinical samples.  相似文献   
276.
?ukasiewicz three-valued logic ?3 is often understood as the set of all 3-valued valid formulas according to ?ukasiewicz’s 3-valued matrices. Following Wojcicki, in addition, we shall consider two alternative interpretations of ?3: “well-determined” ?3a and “truth-preserving” ?3b defined by two different consequence relations on the 3-valued matrices. The aim of this paper is to provide (by using Dunn semantics) dual equivalent two-valued under-determined and over-determined interpretations for ?3, ?3a and ?3b. The logic ?3 is axiomatized as an extension of Routley and Meyer’s basic positive logic following Brady’s strategy for axiomatizing many-valued logics by employing two-valued under-determined or over-determined interpretations. Finally, it is proved that “well determined” ?ukasiewicz logics are paraconsistent.  相似文献   
277.
278.
279.
School System Evaluation by Value Added Analysis Under Endogeneity   总被引:1,自引:0,他引:1  
Value added is a common tool in educational research on effectiveness. It is often modeled as a (prediction of a) random effect in a specific hierarchical linear model. This paper shows that this modeling strategy is not valid when endogeneity is present. Endogeneity stems, for instance, from a correlation between the random effect in the hierarchical model and some of its covariates. This paper shows that this phenomenon is far from exceptional and can even be a generic problem when the covariates contain the prior score attainments, a typical situation in value added modeling. Starting from a general, model-free definition of value added, the paper derives an explicit expression of the value added in an endogeneous hierarchical linear Gaussian model. Inference on value added is proposed using an instrumental variable approach. The impact of endogeneity on the value added and the estimated value added is calculated accurately. This is also illustrated on a large data set of individual scores of about 200,000 students in Chile.  相似文献   
280.
A fundamental approach of theology as practiced within the palliative setting is care for the whole human being, with particular focus on spirituality and the spiritual dimension. Theology and medicine come together in palliative care in which the spiritual aspect is an important component together with the physical, psychological, and social. This article is based on a mixed methods study of spirituality among persons receiving palliative care. Findings revealed the importance of spirituality and its multidimensional elements by which spirituality was perceived as a complex phenomenon relating to religious and non-religious aspects of human life. Theological reflection based on the present findings indicates that a sharp distinction between the concepts of religion and spirituality is not beneficial. It also reveals the significance of the spiritual dimension and that theology has an important role in creating a deeper understanding of this complex part of human existence. Spiritual needs, expressed in various ways, were evident among the participants receiving palliative care. The findings confirm that the theological approach in palliative care, with its focus on the whole human being and emphasis on spirituality and the spiritual dimension, continues to be the hallmark of practicing theology within palliative care.  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