排序方式： 共有61条查询结果，搜索用时 31 毫秒
31.
The problem of ranking is a crucial task in the web information retrieval systems. The dynamic nature of information resources as well as the continuous changes in the information demands of the users has made it very difficult to provide effective methods for data mining and document ranking. Regarding these challenges, in this paper an adaptive ranking algorithm is proposed named GPRank. This algorithm which is a function discovery framework, utilizes the relatively simple features of web documents to provide suitable rankings using a multi-layer/multi-population genetic programming architecture. Experiments done, illustrate that GPRank has better performance in comparison with well-known ranking techniques and also against its full mode edition. 相似文献
32.
Maryam Asoodar Seyyedeh Susan Marandi Shahin Vaezi Piet Desmet 《Interactive Learning Environments》2016,24(4):875-896
In this study we explored the effect of podcasting on the motivation of the students in an online English for Academic Purposes (EAP) course at the university level (N?=?179). By using a mixed-method approach, we analyzed the data collected on the learners' impressions about using podcasts as a learning tool. The particular aim of this study was to help learners do research in English in their specific academic field. In their EAP course the learners are expected to study various types of English texts, listen to media and give lectures on their academic findings. The findings of this study revealed that males found podcasting significantly more relevant and attractive than females. Females, on the other hand, were significantly more satisfied with using podcasts in their EAP class. Further, results showed that learners who had no prior experience of podcasts for academic purposes outperformed the learners with medium experience. For further qualitative investigation, several sources were used for data collection including interviews with the learners, the course forums, emails, the class groupblog, podcasts and open-ended questions. Overall podcasting proved highly effective in motivating the students to learn in the online environment. 相似文献
33.
34.
35.
Maryam Musavinasab Shahnaz Pouladi Niloofar Motamed Maryam Barekat 《Educational gerontology》2013,39(2):100-108
AbstractTo correct poor quality of life due to the elderly’s limitations and cardiovascular disorders requires the identification of supporting resources, adaptation, and enhancement of the sense of coherence. While having the little evidence available, this clinical trial was performed on 96 elderly people with cardiovascular disease. The goal was to determine the effect of education based on a self-management empowerment model on the sense of coherence. The results indicate the effect of a five-step educational intervention on a total sense of coherence score in the experimental group and on its dimensions. The results can provide a framework to design nursing education for the empowerment of the elderly. 相似文献
36.
Automatic review assignment can significantly improve the productivity of many people such as conference organizers, journal editors and grant administrators. A general setup of the review assignment problem involves assigning a set of reviewers on a committee to a set of documents to be reviewed under the constraint of review quota so that the reviewers assigned to a document can collectively cover multiple topic aspects of the document. No previous work has addressed such a setup of committee review assignments while also considering matching multiple aspects of topics and expertise. In this paper, we tackle the problem of committee review assignment with multi-aspect expertise matching by casting it as an integer linear programming problem. The proposed algorithm can naturally accommodate any probabilistic or deterministic method for modeling multiple aspects to automate committee review assignments. Evaluation using a multi-aspect review assignment test set constructed using ACM SIGIR publications shows that the proposed algorithm is effective and efficient for committee review assignments based on multi-aspect expertise matching. 相似文献
37.
The phonologically transparent Persian orthography is normally transcribed with two distinct spellings; words spelled with
vowels (letters) transcribed as a fixed part of the spelling (transparent) and words spelled with vowels (diacritics) omitted
(opaque). Three groups of Persian readers, namely developmental dyslexics (n=29, mean age=9.4, SD=1.4), unimpaired readers matched on age (n=49, mean age=9, SD=1.3), and reading age (n=23, mean age=7.2, SD=0.4) with the dyslexics performed on a short-term memory verbal test. The time taken to read aloud lists of words with opaque
and transparent spellings, the errors made on reading the words in each list, and the number of correctly recalled words in
each list was subjected to statistical analysis. The results showed that transparent words as a whole were read more accurately
than opaque words. However, recall of words was best for opaque words for the older group of unimpaired readers compared to
the transparent words, while the opposite was true for dyslexics and unimpaired reading age matched participants. The implications
of these results are discussed. 相似文献
38.
39.
Fatemeh Sheikhshoaei Nader Naghshineh Sirous Alidousti Maryam Nakhoda Hossein Dehdarirad 《Library & information science research》2021,43(3):101101
Development of a digital library demands extensive financial, human, and technological investments. Appropriate models and measurement tools are required to achieve the goals of these libraries to assess them. This research was conducted with the aim of developing and validating a tool to measure the maturity of a digital library based on the “digital library maturity model” (DLMM). Two sources including literature and experts' opinion were used to determine the criteria for each code. Expert opinion and confirmatory factor analysis were used to confirm the content and construct validity of the developed tool, respectively. The reliability of the designed tool was examined by the Cronbach's alpha test. Finally, the designed tool validity and reliability were confirmed. Managers of digital libraries can use this tool to understand the maturity level of their digital libraries and plan to improve the library or to attain advanced levels of maturity. 相似文献
40.
Hasan Ebrahimi Shahmabadi Seyed Kazem Bagherpour Doun Seyed Ebrahim Alavi Mehri Mortazavi Zahra Saffari Maryam Farahnak Azim Akbarzadeh 《Indian journal of clinical biochemistry : IJCB》2014,29(3):357-361
Emulsion polymerization was used to synthesize poly butyl cyanoacrylate nanoparticles in presence of steric stabilizer dextran 70. Nanoparticles were characterized by particle size analysis, scanning electron microscopy and light microscopy. Polymerization factors affecting particle size and distribution such as dextran 70, polysorbate 80 (PS 80) and H+ concentration, polymerization time and temperature, and sonication were studied. Distinct concentrations of stabilizer were needed to produce proper nanoparticles. In this case, the appropriate value was 2 % of total volume. At pH 4 significant decrease in production efficiency demonstrated the substantial effect of H+ concentration on nanoparticles. Furthermore significant increases in particle size and distribution was observed at 50 °C compared to room temperature. 0.001 % (v/v) PS 80 represented notable influence on size and distribution. In addition, shaped nanoparticles were obtained by altering polymerization time from 5.5 h to 18 h. Finally, nanoparticle features were influenced by different factors. Appropriate manipulating of such factors can lead to obtaining desirable nanoparticles. 相似文献