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Volume 11, 2012
ISSN: 1109-2734
E-ISSN: 2224-266X








Issue 1, Volume 11, January 2012

Title of the Paper:  Electromagnetic field of the large power cables and impact on the human health


Authors: Daniela Carstea

Abstract: In this work we survey our research on domain decomposition and related algorithms for large power electric cables and the impact on the human health. The equations that describe the behaviour of the fields in electromagnetic devices are coupled because most of the material properties are temperature dependent and may depend on temperature in a nonlinear way. More, any power loss is transformed in local heating so that the heat source in the thermal model is the Joule-Lenz effect of the electrical current. Here we assume that the sources of the magnetic field have sinusoidal time dependence and we neglect the effects due to the displacement currents. The target example is from the electric engineering. It is a large power cable in a free space. General symmetry of the device can be used for efficient software. The algorithms for analysis are presented in the context of the finite element method. The results can be extended for simulation of distributed-parameter systems described by elliptic and parabolic equations. The domain decomposition at the level of the problem is used. In this way the coupled magneto-thermal problem can be analyzed by a reduction of the computational effort.

Keywords: Electrical cables; Coupled fields; Finite element method; Bioheat equation.

Title of the Paper:  Design of Logical Structures and Characteristics analysis of AOI for Quantum Dot Cellular Automata


Authors: S. Karthigai Lakshmi, G.Athisha

Abstract: Quantum dot Cellular Automata (QCA) offers a new transistorless computing paradigm in nanotechnology. It has the potential for attractive features such as faster speed , smaller size and low power consumption than transistor based technology .By taking the advantages of QCA we are able to design interesting computational architecture. The basic logic elements used in this technology are the inverter and the majority gate (MG). The majority gate is not a universal gate .Hence another important logic gate introduced in this technology is And-Or-Inverter (AOI).In this paper, we propose design of different logical structures using AOI. The rules are introduced in this paper for easy implementation of AOI circuits for different functions and characteristics of AOI is also defined and analyzed. Design implementations using the AOI gate are compared with the conventional CMOS and majority gate based QCA methodology.

Keywords: QCA, QCADesigner, MG, AOI, CMOS, Computing and Nanotechnology

Title of the Paper:  Fuzzy Logic Based Smart Anaesthesia Monitoring System in the Operation Theatre


Authors: Mirza Mansoor Baig, Hamid Gholamhosseini, Michael J. Harrison

Abstract: Man has a limited ability to accurately and continuously analyse large amounts of data. In recent years, there has been a rapid growth in patient monitoring and medical data analysis using decision support systems, smart alarm monitoring, expert systems and many other computer aided protocols. The main goals of this study are to enhance the developed diagnostic alarm system for detecting critical events during anaesthesia and to accurately diagnose a hypovolaemia event in anaesthetized patients. The performance of the proposed diagnostic system, fuzzy logic monitoring system-2 (FLMS-2), was validated through a series of off-line tests. When detecting hypovolaemia a substantial level of agreement was observed between FLMS-2 and the human expert and it is shown that system has a better performance with sensitivity of 94%, specificity of 90% and predictability of 72%.

Keywords: Fuzzy logic monitoring, anaesthesia monitoring, patient monitoring system, ANFIS, FIS

Issue 2, Volume 11, February 2012

Title of the Paper:  Dynamic Performance Analysis of T Network Impedance Matching


Authors: Rui-Jin Liao, Jian-Wen Tan, Hua Wang, Long Li, Sheng-Ze Qiang

Abstract: Harmonic rejection ability and reflection coefficient are the most important factors in the design of impedance matching network. However, dynamic stability of impedance matching should be taken into account in applications existing working frequency drift, load impedance variation and components deviation due to tolerances and process variation. In order to study the dynamic performance of T network impedance matching, theoretical analysis is conducted in accordance with the Q (quality)-based design method. The relationships between the matching result (reflection coefficient) and components deviation, load impedance variation and operating frequency drift are obtained. The analysis results suggest that higher Q value produces worse dynamic stability and that matching result is more sensitive to load impedance variation when the load reflection coefficient of static state is larger. In designing a T network, it is need to make the tradeoff between dynamic stability and harmonic rejection ability. The analysis results provide theoretical basis for the design and characteristics analysis of T network impedance matching.

Keywords: Impedance Matching, Circuit Analysis, Dynamic Performance, Component Tolerance, Frequency Drift, Circuit Design

Title of the Paper:  A Hardware Architecture for Motion Compensated Video Frame Rate Up-Conversion


Authors: Huong Ho

Abstract: A hardware architecture for motion compensated, video frame rate up-conversion (MC-FRUC) applications is presented in this paper. The MC-FRUC architecture has been designed based on an advanced motion estimation (ME) and motion compensated frame interpolation (MCFI) algorithm to achieve interpolated frames with high level of quality. The proposed architecture is a flexible and highly parallel MC-FRUC that has been designed to support frame rate-up conversion (FRUC) for high definition (HD) video at high frame rate. The ME building block of the MC-FRUC circuit is a reconfigurable structure designed to support reconfigurations for single or multiple reference frames. The MCFI building block performs frame interpolation with the objective of minimizing of block artifacts, overlapping, and holes for the interpolated frames. Hardware implementations for the MC-FRUC design were carried out on FPGA where the circuit high performance FRUC capability has been validated.

Keywords: Frame rate up-conversion, Multi-frame motion estimation, Motion-compensated frame interpolation, Hardware architecture, FPGA implementation, Reconfigurable

Title of the Paper:  Fuzzy Internal Model Control of Nonlinear Plants with Time Delay based on Parallel Distributed Compensation


Authors: Snejana Yordanova, Tasho Tashev

Abstract: The parallel-distributed compensation (PDC) together with Takagi-Sugeno-Kang (TSK) fuzzy modelling proved to be a modern model-based systematic approach for the design of fuzzy nonlinear controllers from stability and robustness requirements. The usual local linear controllers comprise a state feedback. This requires measurements of the state variables or an observer design. The aim of the present investigation is to develop a fuzzy internal model controller (FIMC) for a nonlinear plant with time delay under uncertainties. The FIMC is PDC-TSK based with dynamic local linear controllers, which are designed on the principle of the internal model controllers to ensure local linear systems stability and robustness. The main contribution of the paper is a method for the design of a FIMC, designed FIMC for the control of the air temperature in a laboratory furnace and MATLAB based simulation investigations of the closed loop system stability and dynamic performance. The FIMC reduces the settling time and the overshoot and improves the system robustness compared to a linear PI controller.

Keywords: Fuzzy internal model control, MATLAB, robustness, simulation, stability, temperature, time delay

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