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This paper presents the investigations of forecasting performance of different type of Feedforward Neural Networks (FNN) in forecasting the sunspot numbers. Feedforward Neural Network will be used in this investigation by using different learning algorithms, sunspot data models and FNN transfer functions. Simulations are done using Matlab 7 where customized Graphic User Interface (GUI) called ‘Sunspot...
In this paper, the well-posedness of direction-dependent systems is investigated. The conditions required for well-posedness are derived. When the systems are not well-posed, two possible solutions are proposed to overcome this problem. These are the inclusion of a relay-type switching and the addition of a delay. The advantages and disadvantages of each method are discussed, for various applications...
The electrostatic sensor was used in process industry because of low cost and robust designed. Three types of electrode available in particular application such as pin shape, quarter ring shape and ring shape. The paper was focused on the investigation of the pin shape structure and the characteristic of the circular shape by using different size of structure. Non-instrusive method with circular electrode...
This paper proposes the reduction of specific absorption rate (SAR) with shielding sheet is performed by the finite-difference time-domain method (FDTD) with Lossy-Drude model by CST Microwave Studio. We propose SAR evaluation and reduction methods based on power conservation. It has been shown that even though the use of shielding (ferrite) material not only reduces the SAR in the human head but...
A Cognitive radio (CR) observes the environment through a combination of inputs from physical and MAC as well as user needs. These measureable parameters are usually referred as “meters”. Meters can provide the CR with an information base upon which to make decisions. Spectrum sensing is one of the most challenging issues in cognitive radio systems. Several algorithms and techniques to improve them...
This paper discusses the disease-free and endemic equilibrium points of a SVEIRS propagation disease model which may potentially involve the injection of a regular constant vaccination.
This paper proposes advanced single-phase AC-DC converter using single-phase matrix converter (SPMC) topology incorporating with active power filter function. The topology is also capable of incorporating many other features for controlled rectifier operation that includes; bidirectional, regenerative and dual converter capabilities. The PWM technique was used to calculate the switch duty ratio to...
The identification of the static characteristics of an electric multizone furnace is considered. A gray box approach is utilized. The furnace is divided into segments both horizontally and radially, and physical equations are used to describe heat transfers between segments. The identification strategy seeks to estimate an accurate temperature profile of the furnace at steady-state using a smaller...
This paper depicts the development of backward automatic parallel parking system for nonholonomic mobile robot. The configuration of the system consists of ultrasonic sensor, rotary encoder, controller, and actuators. The path planning algorithm is developed based on the data acquired from the sensor. The proposed idea of the path planning is based on the geometrical equations in which the needed...
This paper presents a specially designed power switching generator device that produces 4 types of waveforms; square-wave, sinusoidal PWM, quasi-sinewave or multilevel and high-frequency DC pulses with a total of 14 different distinctive characteristics. The generator is exceptionally a useful tool to the students and researchers that dedicate themselves primarily in power electronics areas. The device...
As overhead distribution lines and their associated equipments are most prone to insulation failure due to lightning and very much affected in terms of reliability, a study was intended to determine the line lightning performance and to analyze available mitigation options focusing on medium voltage overhead distribution line. This paper describes the simulation studies in determining the lightning...
FES induced movement control is a significantly challenging area due to complexity and non-linearity of musculo-skeletal system. The goal of this study is to design a cycle-to-cycle control of FES-induced swinging motion. In this approach only the quadriceps muscle is stimulated by controlling the amount of stimulation pulsewidth. This time dependent behaviour is successfully compensated for using...
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