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101.
Research on categories and markets suggests that audiences rely on categorical distinctions to make sense of market offerings. Market offerings that deviate from category norms risk devaluation. Although literature in this area has led to valuable insights, scholars have begun to question whether there has been an overemphasis on conformity, leaving existing theories ill-equipped to account for innovation. Within this context, we argue that research on authenticity in cultural sociology offers a useful platform for theorizing. We draw on the work of Peterson (1997), who underscores the importance of signals in evaluation. Objective features of market offerings (e.g., quality) matter, but particularly for innovations, these features are not readily visible. Because authentic producers are typically thought to be more committed, capable, and intrinsically motivated, when visibility of such objective features is lacking, authenticity may serve as an alternative indicator of value. Appearing authentic requires signaling believability with respect to category norms, while also being distinctive. Using data on 684 firms from five high technology sectors, we explore the relationship between authenticity and investor perceptions of value. Focusing on three different proxies for signals of authenticity—networks, governance, and narratives—we find a curvilinear association between conformity/distinctiveness and Tobin's q. Consistent with our view of authenticity as a signal, we also find that this relationship flattens as firms gain better track records and face stiffer competition.  相似文献   
102.
罗素·麦金龙 《游泳》2011,(6):I0024-I0025
女子水球半决赛之后,马欢欢倒在游泳池边上。所有人都在想在上海举行的决赛上会不会缺席这位最出色的选手。但是,尽管处于昏迷的边缘,马欢欢仍然努力去控制痛苦与喜悦。她的两次进球和巨大贡献,为中国赢得了参加决赛的资格,也使自己成为世锦赛上最有价值的选手。  相似文献   
103.
When using a driver, the centre of pressure of a golfer shows a pattern that is characteristic of one of two distinct swing styles: the "front foot" style or the "reverse" style. The aim of this study was to establish whether these two swing styles are also evident when using other clubs, and if so, to determine whether golfers use the same swing style when using different clubs. Forty-six professional, amateur, and recreational golfers performed swings to hit a ball into a net placed 3 m away. Ten swings were performed for each of the driver, 3-iron, and 7-iron while standing on two force plates. The position of the golfer's centre of pressure parallel with the line of shot and relative to the feet was quantified at eight swing events that were identified from 200-Hz video. Cluster analysis confirmed that the front foot and reverse styles were evident in all three clubs, and most of the golfers (96%) used the same swing style for all three clubs. Golfers that used the reverse swing positioned their centre of pressure nearer to their toes at ball contact compared with golfers that used the front foot swing.  相似文献   
104.
Combining home–school literacy bags with preschool family literature circles provided a strong foundation for family involvement at home and school during this year-long Reading Partners project, and helped parents become essential partners in their children’s literacy development. Using home–school literacy bags, children and parents learned how to combine expressive arts and emergent literacy strategies including alphabet recognition, phonemic and phonological awareness, and oral language fluency. State-of-the-art activities designed for each of the multiple intelligences met the needs of diverse students with many different learning styles and interests. As families participated in fall and spring school-based Festivals in which they shared the literacy bags in small group family literature circles, they demonstrated children’s emerging literacy skills in a relaxed, yet highly engaging atmosphere.  相似文献   
105.
The transition from teacher training into the teaching profession is seen to be key in the biography of a teacher. Yet there is a lack of enquiry into the development of the content knowledge (CK) and pedagogical content knowledge (PCK) held by teachers at the end of their education, and into the significance of this knowledge for situational and behavioural cognition. On the basis of data from the international comparative study TEDS-M 2008 and the Germany-based 2012 follow-up, this contribution investigates the knowledge and skills development of teachers during the transition from teacher training to the teaching profession in a four-year longitudinal study with n = 171 mathematics teachers. Three test formats (paper-and-pencil, video-vignettes and speed tests) are used to examine various indicators for teacher expertise. In addition to the analysis of changes in mathematical CK and PCK levels, path analysis is used to determine the extent to which this knowledge functions as a predictor for the perception and interpretation of classroom situations, the decision-making in these situations, and the quick identification of student mistakes. The results show only small changes in the group mean (for MCK there is a small loss, whereas MPCK remains constant), but high fluctuation (i. e. weak correlation) in the MPCK ranking between the two measurement occasions, pointing to differential learning effects gained from teaching practice. There are also significant differences in predictability: MCK is important for the speed indicators of teacher expertise; MCK and MPCK for the perception and interpretation of situations, and for the generation of action strategies. These findings can on the one hand help to facilitate the evaluation of beginning teachers’ need for support and, on the other hand, they indicate the necessity for the early integration of practice-based elements into teacher training programmes with the aim of developing PCK and related skills.  相似文献   
106.
Discrimination reversal learning has been used as a measure of species flexibility in dealing with changes in reinforcement contingency. In the simultaneous-discrimination, midsession-reversal task, one stimulus (S1) is correct for the first half of the session, and the other stimulus (S2) is correct for the second half. After training, pigeons show a curious pattern of choices: They begin to respond to S2 well before the reversal point (i.e., they make anticipatory errors), and they continue to respond to S1 well after the reversal (i.e., they make perseverative errors). That is, pigeons appear to be using the passage of time or the number of trials into the session as a cue to reverse, and are less sensitive to the feedback at the point of reversal. To determine whether the nature of the discrimination or a failure of memory for the stimulus chosen on the preceding trial contributed to the pigeons’ less-than-optimal performance, we manipulated the nature of the discrimination (spatial or visual) and the duration of the intertrial interval (5.0 or 1.5 s), in order to determine the conditions under which pigeons would show efficient reversal learning. The major finding was that only when the discrimination was spatial and the intertrial interval was short did the pigeons perform optimally.  相似文献   
107.
108.
This design case follows an ongoing collaboration between an instructional technologist and a high school literature teacher promoting reading comprehension through modules that provide visually interesting display of text on a computer screen along with cognitive tools. The modules were found to boost comprehension of specific content in even one use, and over time, overall reading skills were improved. Specific examples from the design and development process of this collaboration are shared here to illustrate decisions made in the face of common constraints—limited time, funding, and technical know-how—that emerged from theory and pilot studies. Teacher educators and their instructional-technology collaborators can use the information from this design and research process to harness the potential of ubiquitous software in affordable, replicable, and pedagogically sound ways.  相似文献   
109.
The recent convergence of digital cameras into mobile phones with Internet connectivity has provided the opportunity for individuals and organisations to adopt new image-making practices. The widespread use of photo-sharing and social networking platforms for sharing, accessing and storing digital photographs is presenting scholars in the social sciences with new areas of research that address the nature of digital photography. By examining the technological, social and cultural factors involved in contemporary image-making practices, scholars are presenting new concepts regarding the characteristics of digital photographs that impact archival activities aimed at managing and preserving trustworthy digital records. This article identifies and discusses the key concepts emerging from social science research on digital photography that are most relevant to the archival field. Analysis of the findings of these studies suggests that new technologies and social practices are changing how people use digital photographs and their expectations of permanence. Therefore, archivists need to be engaged in interdisciplinary discussions regarding the evolution of photographic practices and emerging characteristics of digital photographs in order to anticipate the management and preservation activities required to protect contemporary visual records for future use.  相似文献   
110.
This article reports on a study of the awareness, perceptions and use of e-books by academic staff in Further Education (FE) colleges throughout Northern Ireland (NI). It is the first comprehensive study of e-book use by FE faculty in NI and fills a significant gap in the research literature on e-books in education, which has tended to focus on Higher Education and the university setting. Data was collected through an online survey which was distributed to FE faculty across NI. The findings show that although FE academic staff are receptive to e-books and welcome them as a resource, poor reading experience and lack of awareness of relevant titles have had an impact. In particular, the research found that 40% of academic staff, in post less than five years, had not used e-books. Greater availability of titles, promotion, and better integration within teaching and learning emerge as key requisites for effective service delivery and enhancement of e-books within FE, as does the need for better targeted instruction and training aimed at academic staff. Understanding patrons' views, awareness, needs, habits and expectations in relation to e-books is crucial to help direct collection content while budgets remain tight and physical space limited.  相似文献   
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