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101.
School tasks interact with student motivation, cognition, and instruction to influence learning and achievement. Heeding calls for additional research linking motivational and cognitive factors in learning and instruction on specific tasks within authentic classroom settings we quantitatively and qualitatively track 90 tenth‐grade science students’ motivation, reported use of learning strategies, achievement, calibration, and task perceptions as they engage in a well‐structured task (WST) and an ill‐structured task (IST). Students achieved higher grades on, and reported more ease and value for, the WST whereas they utilised critical thinking and peer learning strategies more on the IST. Lower academic achievers calibrated their achievement less accurately on each task and experienced lower grades, interest, ease, and management capability on the IST. Conversely, higher academic achieving students reported more self‐efficacy and effort regulation and lower anxiety and elaboration on the IST. Motivation – notably less intrinsic goal orientation in low academic achievers and higher task value and self‐efficacy – predicted performance on the IST. The structure of tasks may provide prompts that illicit unique self‐regulated learning responses in students. 相似文献
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Information retrieval systems consist of many complicated components. Research and development of such systems is often hampered by the difficulty in evaluating how each particular component would behave across multiple systems. We present a novel integrated information retrieval system—the Query, Cluster, Summarize (QCS) system—which is portable, modular, and permits experimentation with different instantiations of each of the constituent text analysis components. Most importantly, the combination of the three types of methods in the QCS design improves retrievals by providing users more focused information organized by topic.We demonstrate the improved performance by a series of experiments using standard test sets from the Document Understanding Conferences (DUC) as measured by the best known automatic metric for summarization system evaluation, ROUGE. Although the DUC data and evaluations were originally designed to test multidocument summarization, we developed a framework to extend it to the task of evaluation for each of the three components: query, clustering, and summarization. Under this framework, we then demonstrate that the QCS system (end-to-end) achieves performance as good as or better than the best summarization engines.Given a query, QCS retrieves relevant documents, separates the retrieved documents into topic clusters, and creates a single summary for each cluster. In the current implementation, Latent Semantic Indexing is used for retrieval, generalized spherical k-means is used for the document clustering, and a method coupling sentence “trimming” and a hidden Markov model, followed by a pivoted QR decomposition, is used to create a single extract summary for each cluster. The user interface is designed to provide access to detailed information in a compact and useful format.Our system demonstrates the feasibility of assembling an effective IR system from existing software libraries, the usefulness of the modularity of the design, and the value of this particular combination of modules. 相似文献
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Dianne Conrad 《Distance Education》2002,23(2):197-212
Recent research on online learning has explored the dense fabric of social presence giving us a better understanding of the rhythms of the teaching-learning exchange. Quantitative studies, especially, have concluded with calls for deeper, more intensive explorations into what happens in online learning environments (Rourke, Anderson, Garrison, & Archer, Journal of Distance Education, 14 (2), 50-71, 1999 ). In this paper, the results of an interpretive study conducted among mature university learners engaged in online study reveal learners' strong affinity to a code of online etiquette. On the demanding front lines of online learning, these learners valued and constructed ways of "being nice" to their fellow learners, creating tolerable levels of harmony and community within which to complete their studies successfully. 相似文献
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Bruce F. Pennington Dianne L. Lefly Guy C. Van Orden Myra O. Bookman Shelley D. Smith 《Annals of dyslexia》1987,37(1):62-89
A pervasive assumption in most accounts of normal reading and spelling development is that phonological coding is important
early in development but is subsequently superseded by faster, orthographic coding which bypasses phonology. We call this
assumption, which derives from dual process theory, the developmental bypass hypothesis. The present study tests four specific
predictions of the developmental bypass hypothesis by comparing dyslexics and nondyslexics from the same families in a cross-sectional
design. The four predictions are: 1) That phonological coding skill develops early in normal readers and soon reaches asymptote,
whereas orthographic coding skill has a protracted course of development; 2) that the correlation of adult reading or spelling
performance with phonological coding skill is considerably less than the correlation with orthographic coding skill; 3) that
dyslexics who are mainly deficient in phonological coding skill should be able to bypass this deficit and eventually close
the gap in reading and spelling performance; and 4) that the greatest differences between dyslexics and developmental controls
on measures of phonological coding skill should be observed early rather than late in development.
None of the four predictions of the developmental bypass hypothesis were upheld. Phonological coding skill continued to develop
in nondyslexics until adulthood. It accounted for a substantial (32–53 percent) portion of the variance in reading and spelling
performance in adult nondyslexics, whereas orthographic coding skill did not account for a statistically reliable portion
of this variance. The dyslexics differed little across age in phonological coding skill, but made linear progress in orthographic
coding skill, surpassing spelling-age (SA) controls by adulthood. Nonetheless, they didnot close the gap in reading and spelling performance. Finally, dyslexics were significantly worse than SA (and Reading Age [RA])
controls in phonological coding skill only in adulthood.
This research was supported by the following grants to the first author: A NIMH RSDA (MH00419-05) and project grants from
NIMH (MH38820-04), NICHD (HD19423-02) and the March of Dimes (12-135). Author Smith’s work was supported by a project grant
from NICHD (HD 19423-02). 相似文献
107.
Susan Gibson Dianne Oberg 《British journal of educational technology : journal of the Council for Educational Technology》2004,35(5):569-585
Teachers in many countries are being expected to use the Internet in their work. Research on the Canadian experience of Internet implementation provides insights that may be valuable for researchers and educators in other countries. A three‐year study, using both quantitative and qualitative approaches, examined both the visions for Internet use and the realities of everyday practice related to Internet use in Canadian schools. Participants in the study included ministry of education officials, teacher association officials, classroom teachers, and school administrators. Findings of the study suggest that all four participant groups were positive about the visions of the Internet as a tool with the potential to contribute to the enhancement of teaching and the development of information literate students. The realities of Internet use, however, were quite different from the visions. All four participant groups reported that the Internet was being used mostly to increase access to information. Its potential as an innovative learning tool for students and for teachers was largely unrealised. Few respondents reported using the collaboration, creation, and dissemination capabilities of the Internet. This outcome appeared to be the result of limited infrastructure support, difficulties in infusing Internet use into curriculum, and lack of appropriate teacher professional development. 相似文献
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Janet M. Cope Cynthia C. Bennett Gytis Balilionis Dianne M. Person 《Anatomical sciences education》2021,14(1):79-88
In 2017, Elon University became one of very few universities in the United States without a medical school to have an in-house Anatomical Gift Program (AGP). The program accepts first-person-consenting individuals only and within 2.5 years has become self-sufficient, supporting anatomy curricular needs of its physical therapy, physician assistant, and undergraduate biology and anthropology programs (n = 21 donors annually). This paper describes the timeline, costs, and benefits of developing an in-house AGP at a university without a medical school. Policy development, public outreach, equipment needs, and cost benefits are discussed. Within 2.5 years of program opening, the AGP Director delivered 161 educational outreach presentations at 86 different venues across the state providing information on anatomical gifting. The program registered 320 individuals (60% female, 40% male) and enrolled 41 deceased donors (69% female, 31% male; average age of 74.6 at time of registration and 74.8 at donation). During the first seven months of the program, donor preparation costs (with outsourcing for transport/donor preparation/document filing/serology testing/cremation) averaged US$ 2,100 per donor. Over the past 23 months, donor preparation has been completed on site, lowering the cost per donor to US$ 1,260. Other costs include personnel salaries, legal fees, and outfitting of the anatomy laboratory and preparatory room. Program benefits include support of anatomy education on campus, assurance that all donors have given first-person consent, and faculty/student access to donor-determined health, social, and occupational information. Faculty, staff, and students contribute to the daily operations of the AGP. 相似文献