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排序方式: 共有216条查询结果,搜索用时 15 毫秒
21.
This paper proposes a new approximation to be used for the correction function in the turbo decoding algorithm, called Linear-Constant-log Map. Max-log Map, Linear-log Map and Constant-log Map are the well known simplified versions of Jacobi-log Map (Maximum a Posteriori) algorithm already in use but they cannot meet a proper performance in term of output BER and clock consumption of the CPU decoding encoded bits. The proposed algorithm first breaks the correction function domain of the Jacobi logarithm to three subsections by determining the border points between these sections and then uses a linear function and two constant values as an approximation of this function. Using an AWGN channel model, simulation results show that the new algorithm is almost more than six times faster than Jacobi-log Map algorithm with a Bit Error Rate (BER) very close to it. 相似文献
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Ta Goh Choo Halim Sharina Abdul Azman Norzaini Komoo Ibrahim Mokhtar Mazlin 《Tertiary Education and Management》2021,27(4):331-349
Tertiary Education and Management - Evaluation of research performance has significantly increased in importance, particularly in many emerging higher education systems. In Malaysia, the Malaysian... 相似文献
24.
K. G. Saw Omar Majid N. Abdul Ghani H. Atan R. M. Idrus Z. A. Rahman K. E. Tan 《British journal of educational technology : journal of the Council for Educational Technology》2008,39(3):475-485
This paper is a study on the interaction patterns of distance learners enrolled in the Mathematics and Physics programmes of Universiti Sains Malaysia in the videoconferencing learning environment (VCLE). Interaction patterns are analysed in six randomly chosen videoconferencing sessions within one academic year. The findings show there are more interactions in the graphics display mode than the video display mode. The graphics display mode, which involves the simultaneous interaction of the teacher, students and course materials, shows greater student engagement in the VCLE. The focus on a three-component interaction in distance learning differs from previous studies which looked at distinct types of two-component interactions. The types of communicative interaction, in particular the explanatory and cognitive types which are dominant in the graphics display mode, are discussed within the construct of learning. The higher number of teacher-initiated interactions may also imply that the teacher plays a crucial role in creating and maintaining a community of inquiry focused on exploring and developing content as well as giving feedback on concepts, ideas or solutions. 相似文献
25.
非常感谢中国联合国教科文组织全国委员会的盛情邀请,对于联合国教科文组织每位成员细致人微的工作,我都赞叹不已。在此,非常感谢你们如此出色的工作,同时与这样的团队及成员合作我感到非常愉快,而且常受益匪浅。我已有七八年的时间没有从事开放与远程学习领域的工作,但我确信这个领域已经取得了长足的发展,因此站在这里我感到有些不安,报告中的不妥之处还请大家谅解。 相似文献
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AWAD Samir Hamid 《重庆大学学报(英文版)》2005,4(1)
1 Introduction Weight saving materials such as aluminum and its alloys are becoming increasingly important and have been attracting increasing attention over the past decade, specially in the automotive, aerospace and chemical industries, and electrical devices because of their high strength-to-weight ratio, high electrical and thermal conductivities, processability and recyclability and good resistance to degradation in some corrosive environments [1,2]. In the automotive industry, there is d… 相似文献
27.
M. Obaidul Hamid 《Discourse: Studies in the Cultural Politics of Education》2016,37(3):472-487
Globalized English proficiency tests such as the International English Language Testing System (IELTS) are increasingly playing the role of gatekeepers in a globalizing world. Although the use of the IELTS as a ‘policy tool’ for making decisions in the areas of study, work and migration impacts on test-takers' lives and life chances, not much is known about its own policy and policy logic. With the growing call for listening to test-takers' voices, specific policy aspects of the test have recently been scrutinized. This article seeks to contribute to this area by drawing on test-takers' perspectives on the IELTS retake policy and developing an understanding of how policies of global English tests are perceived, interpreted and given new meanings by its key stakeholders. Although the truth-value of the emic views of test-takers may be debated, their experiences and perceptions problematize the reliability claims of the testing agency by locating commercial motives at the center of their policy and thereby raising theoretical, professional and ethical questions. 相似文献
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Muhammad Abdul Mannan 《Higher Education》2001,41(3):283-298
This study assesses the current and ideal levelsof academic and social integration within the University of PapuaNew Guinea as perceived by the students. In order to reducestudent attrition through developing an appropriate attritionpolicy and improving services, a comprehensive picture of thecurrent and ideal academic and social integration climate in theUniversity of Papua New Guinea was necessary. Previousattrition/retention research has not adequately described thevarying degrees of group differences in students' integrationprocess. Using the Tinto model and research instruments thatoperationalised the model, an institutional academic and socialintegration assessment instrument was developed for measuring theperceived current and ideal integration climate. Respondent'sperceived ideal ratings for 24 items representing five dimensionsof academic and social integration were higher than for thecurrent ratings. Significant differences were found between thecurrent and ideal perceptions of student groups in respect of a)students' informal contact with faculty; b) faculty concern forstudents' development and teaching and c) extra curricularactivities. Differences were found between the perceived ratingsof student groups on the basis of year of studies. Implicationsfor policy directives and discriminatory service delivery arealso discussed. 相似文献
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David NICHOLAS Anthony WATKINSON Hamid R. JAMALI Eti HERMAN Carol TENOPIR Rachel VOLENTINE Suzie ALLARD Kenneth LEVINE 《Learned Publishing》2015,28(1):15-21
The article presents one of the main findings of an international study of 4,000 academic researchers that examined how trustworthiness is determined in the digital environment when it comes to scholarly reading, citing, and publishing. The study shows that peer review is still the most trustworthy characteristic of all. There is, though, a common perception that open access journals are not peer reviewed or do not have proper peer‐review systems. Researchers appear to have moved inexorably from a print‐based system to a digital system, but it has not significantly changed the way they decide what to trust. They do not trust social media. Only a minority – although significantly mostly young and early career researchers – thought that social media are anything other than more appropriate to personal interactions and peripheral to their professional/academic lives. There are other significant differences, according to the age of the researcher. Thus, in regard to choosing an outlet for publication of their work, young researchers are much less concerned with the fact that it is peer reviewed. 相似文献