In this paper, we propose a new method for Active Net model. Active Net is a lattice network model that is based on minimizing an energy to extract the region of a target object. In a conventional method, only one tar...
详细信息
As industrial technology gets more mature, a single fiber can offer more and more wavelengths. However, it also results in a large amount of switching ports at optical cross-connects (OXCs). Certainly, it is expected ...
详细信息
In this paper, we investigated OFDM signals with smaller PAPRs when using new complementary code sets. The proposed complementary code sets are surveyed by computer. Then their PAPRs are calculated by simulation. Ther...
详细信息
With the rapid growth of computer and mobile technology, it is a challenge to integrate computer based test (CBT) with mobile learning (m-learning) especially for formative assessment and self-assessment. In terms of ...
详细信息
With the rapid growth of computer and mobile technology, it is a challenge to integrate computer based test (CBT) with mobile learning (m-learning) especially for formative assessment and self-assessment. In terms of self-assessment, computer adaptive test (CAT) is a proper way to enable students to evaluate themselves. In CAT, students are assessed through a process that uses item response theory (IRT), a well-founded psychometric theory. Furthermore, a large item bank is indispensable to a test, but when a CAT system has a large item bank, the test item selection of IRT becomes more tedious. Besides the large item bank, item exposure mechanism is also essential to a testing system. However, IRT all lack the above-mentioned points. These reasons have motivated the authors to carry out this study. This paper describes a design issue aimed at the development and implementation of an adaptive testing system. The system can support several assessment functions and different devices. Moreover, the researchers apply a novel approach, particle swarm optimization (PSO) to alleviate the computational complexity and resolve the problem of item exposure. Throughout the development of the system, a formative evaluation was embedded into an integral part of the design methodology that was used for improving the system. After the system was formally released onto the web, some questionnaires and experiments were conducted to evaluate the usability, precision, and efficiency of the system. The results of these evaluations indicated that the system provides an adaptive testing for different devices and supports versatile assessment functions. Moreover, the system can estimate students' ability reliably and validly and conduct an adaptive test efficiently. Furthermore, the computational complexity of the system was alleviated by the PSO approach. By the approach, the test item selection procedure becomes efficient and the average best fitness values are very close to the optimal so
In recent years blog-assisted learning has been used widely in higher education for improving writing and collaboratively sharing work online. However, methods for gathering useful information to be used as auxiliary-...
详细信息
One aim of testing is to identify weaknesses in students' knowledge. computerized tests are now one of the most important ways to judge learning, and, selecting tailored questions for each learner is a significant...
详细信息
Hydrogen sensing properties of a Pd/AlGaN-based Schottky diode are improved by the deposition of SiO2 at the metal/semiconductor (MS) interface. The wide Schottky barrier height variation of the MOS diode could be att...
详细信息
With the ever-growing database sizes, we have enormous quantities of data, but unfortunately we cannot use raw data in our day-to-day reasoning/decisions. We desperately need knowledge. This knowledge is in most cases...
详细信息
The problem of deriving association rules from data was first formulated in [9] and is called the "market-basket problem". This paper presents an efficient version of APRIORI algorithm for mining multi-level...
详细信息
There are two basic ways in which the basic procedures can be speeded up: speeding up each addition and reducing the number of additions required. Faster addition can be achieved through the use of progressively faste...
详细信息
暂无评论