Students with vision impairment encounter barriers in studying mathematics particularly in higher education levels. They must have an equal chance with sighted students in mathematics subjects. Making mathematics accessible to the vision impaired users is a complicated process. This accessibility can be static or dynamic, in static accessibility the user is presented with a representation of th...

Evolutionary forms are skew-symmetric differential forms the basis of which, as opposed to exterior forms, are deforming manifolds (with unclosed metric forms). Such differential forms arise when describing physical processes. A specific feature of evolutionary forms is the fact that from the evolutionary forms, which correspond to the conservation laws for material media, the closed exterior f...

To support battery powered mobile broadband wireless access devices efficiently, IEEE 802.16e defines a sleep mode operation for conserving the power of mobile terminals. In this paper we propose a theoretical Phase-type (PH) based Markov chain model to analyze the performance of IEEE 802.16e sleep mode operation. The model describes the behavior of the mobile stations working in sleep mode. In...

In considering nonlinearity and uncertainty in the large erecting system, a fuzzy adaptive PID controller is introduced to improve the control performance. The mathematic model is constructed at first based on the physical laws. Then, the fuzzy logic algorithm which can regulate PID parameters on-line is designed and fuzzy inference rules are established between the PID parameters and the error...

In this paper we are concerned with global optimization, which can be defined as the problem of finding points on a bounded subset of IRn in which some real valued functionf assumes its optimal (i.e. maximal or minimal) value. We present a stochastic approach which is based on the simulated annealing algorithm. The approach closely follows the formulation of the simulated annealing algorithm as...

Although the permanent magnet linear synchronous motor has been used in industry gradually, it has some drawbacks to restrict the using region. In order to overcome the disadvantages, the advanced control strategies were adopted to improve the performance of PMLSM. In the paper, the field oriented control and direct torque control strategies were researched, their control model was established ...

The study mainly investigates the students’ attitudes toward mathematic learning and web-based mathematic competition in different learning stages in Taiwan. This study was to conduct an online survey, which is driven by three issues: (1) What are the differences in mathematical learning attitudes with the web-based mathematics competition in the different learning stages (2) Is there any signi...