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Manivara Kumar P.,Chalapathi Institute of Engineering and Technology | Tirupal T.,Narayana Engineering College
Journal of Electrical Engineering

Imag compression helps in fast data transfer and effective memory utilization. The objective of image compression is to reduce data redundancy of the image while retaining high image quality. This paper describes an approach for wavelet based image compression using Multi Layer Feed Forward Neural Network with Error Back Propagation training algorithm applied to second and third level approximation component and modified Run Length Coding is applied to second and third level Horizontal and vertical components and threshold is used to discard insignificant coefficients. The experimental results on several images indicate that the proposed algorithm is superior to the existing algorithm in terms of Compression Ratio (CR) by 30% to 40% with different wavelets. The performance of the proposed algorithm is also compared with different discrete wavelet transform (DWT) techniques. Source

Ramineni S.,Chalapathi Institute of Engineering and Technology | Kannasani R.K.,RA Chemical Pharma Ltd. | Kalikinidi N.R.,Indian Institute of Chemical Technology
Der Pharma Chemica

DL-10-Camphorsulfonic acid (CAS. No- 5872-088-2) was found to be a convenient catalyst for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones through a one-pot three-component reaction of aldehydes, alkyl acetoacetate, and urea at 80°C under solvent-free conditions. Source

Nageswara Rao G.,Chalapathi Institute of Engineering and Technology | Sangameswara Raju P.,Sv University | Chandra Sekhar K.,Rashtreeya Vidyalaya College of Engineering
International Journal of Electrical Power and Energy Systems

In this paper, an Adaptive Neuro Fuzzy Interference System (ANFIS) is proposed for eliminating voltage harmonics present in the multilevel inverter. It is achieved by reducing the THD present in the multilevel inverter output voltage. Here, the voltage variation of the multilevel inverter is determined from the actual load voltage and the reference voltage. The voltage variation at different time interval has been applied to the ANFIS. According to the voltage variations, the switching angles can be generated from the interference system. These switching angles can make the multilevel inverter output voltage with reduced THD. The proposed technique is implemented in the MATLAB/simulink working platform. The effectiveness of the proposed method is evaluated by the multilevel inverter output voltage without controller and with Neuro Fuzzy Controller (NFC). © 2014 Elsevier Inc. All rights reserved. Source

Babu S.,Chalapathi Institute of Engineering and Technology
E-Journal of Chemistry

Theoretical values of ultrasonic velocity in the binary mixtures of chlorobenzene with benzene have been evaluated at different temperatures from 303.15 K-323.15 K using Nomoto's relation, ideal mixture relation, Junjie's method, collision factor theory and free length theory. Theoretical values were compared with the experimental values and the validity of the theories was checked by applying the chi-square test for goodness of fit and by calculating the average percentage error (APE). Source

Ramineni S.,Chalapathi Institute of Engineering and Technology | Kannasani R.K.,RA Chemical Pharma Ltd. | Peruri V.V.S.,Acharya Nagarjuna University
Green Chemistry Letters and Reviews

A simple and efficient method has been developed for the synthesis of benzoxazoles from 2-aminophenol and substituted aldehydes in the presence of a catalytic amount of zinc triflate in ethanol solvent at reflux temperature. © 2014 The Author(s). Published by Taylor & Francis. Source

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