Time filter

Source Type

Sridharan B.,Vishwakarma Institute of Technology
2010 IEEE 2nd International Advance Computing Conference, IACC 2010

This paper describes a novel approach towards the modification of Genetic Algorithms. The novelty of the modified Genetic Algorithm lies in the addition of a new parameter called the age of the chromosome that would select its ability to reproduce. Also, the concept of dynamic population and elitism size has been introduced. The modified Genetic Algorithm converges to the near optimum value at a faster rate, i.e. lesser number of generations are required for the convergence and due to the concept of dynamic population size the results obtained are more accurate. Thus, the modified algorithm is observed to be computationally more efficient. The algorithm was tested for some standard functions and curves and the results were found to be highly satisfactory. ©2010 IEEE. Source

Maghade D.K.,Vishwakarma Institute of Technology | Patre B.M.,Shri Guru Gobind Singhji Institute of Engineering and Technology
ISA Transactions

In this paper, a decentralized PI/PID controller design method based on gain and phase margin specifications for two-input-two-output (TITO) interactive processes is proposed. The decouplers are designed for systems to minimize the interaction between the loops, and the first order plus dead time (FOPDT) model is achieved for each decoupled subsystem based on the frequency response fitting. An independent PI/PID controller is designed for each reduced order decoupled subsystem to obtain the desired gain and phase margins, and the performance is verified on the original interactive system to show the effectiveness of the proposed design method for the general class of TITO systems. Simulation examples are incorporated to validate the usefulness of the presented algorithm. An experimentation is performed on the Level-Temperature reactor process to show the practical applicability of the proposed method for the interactive system. © 2012 ISA. Published by Elsevier Ltd. All rights reserved. Source

Jadhav D.V.,Vishwakarma Institute of Technology | Holambe R.S.,SGGSIE and T
Pattern Recognition Letters

This paper presents an in-plane rotation (tilt), illumination invariant pattern recognition framework based on the combination of the features extracted using Radon and discrete cosine transforms and kernel based learning for face recognition. The use of Radon transform enhances the low frequency components, which are useful for face recognition and that of DCT yields low dimensional feature vector. The proposed technique computes Radon projections in different orientations and captures the directional features of the face images. DCT applied on Radon projections provides frequency features. Further, polynomial kernel Fisher discriminant analysis implemented on these features enhances discrimination capability of these features. The technique is also robust to zero mean white noise. The feasibility of the proposed technique has been evaluated using FERET, ORL, and Yale databases. © 2009 Elsevier B.V. All rights reserved. Source

Shilaskar S.,Vishwakarma Institute of Technology | Ghatol A.,K Js Educational Institutes
Expert Systems with Applications

Machine learning has emerged as an effective medical diagnostic support system. In a medical diagnosis problem, a set of features that are representative of all the variations of the disease are necessary. The objective of our work is to predict more accurately the presence of cardiovascular disease with reduced number of attributes. We investigate intelligent system to generate feature subset with improvement in diagnostic performance. Features ranked with distance measure are searched through forward inclusion, forward selection and backward elimination search techniques to find subset that gives improved classification result. We propose hybrid forward selection technique for cardiovascular disease diagnosis. Our experiment demonstrates that this approach finds smaller subsets and increases the accuracy of diagnosis compared to forward inclusion and back-elimination techniques. © 2012 Elsevier Ltd. All rights reserved. Source

Maghade D.K.,Vishwakarma Institute of Technology | Patre B.M.,Shri Guru Gobind Singhji Institute of Engineering and Technology
Transactions of the Institute of Measurement and Control

In this paper, the design methods of decentralized PID controllers based on decoupled subsystems are proposed for two-input two-output systems. The higher-order decoupled subsystems are reduced into simple dynamics such as first-order plus dead-time or second-order plus dead-time and the dominant poles are placed at desired locations. The well tuned parameters of decentralized PID controllers can be obtained based on the movement of poles to get the desired closed-loop response of the system. A corollary derived from the generalized Nyquist stability theorem is used to ascertain the nominal system stability and to hold robust stability in the presence of the process multiplicative uncertainties. Finally, two simulation examples are provided for the validity and effectiveness of the proposed design methods. It can be observed that the high closed-loop performance is obtained using the proposed methods and it is comparable to recent methods available in the literature. © The Author(s) 2013. Source

Discover hidden collaborations