Time filter

Source Type

Kavitha K.,Vivekanandha Institute of Engineering and Technology for Women | Krishnamoorthi K.,Salem College
Journal of Theoretical and Applied Information Technology | Year: 2014

To overcome the conduction and switching losses generated by earlier converter designs, we propose a new genetic algorithm based Cuk converter design which increases the performance of photovoltaic system. The objective is to produce high-efficiency, voltage and current of a PV system with help of GA Controller. The requirement of continuous and controlled flow of voltage has met with the support of GA controller and the capacitors present with the schematic design helps this requirement to be met in an efficient way. The MOSFET controls the voltage in bi-direction and the capacitors help to supply the voltage in a steady flow. The capacitors get charged both in serial and parallel execution of the circuit and the MOSFET controls the flow of voltage. The conduction losses are reduced by using GA controller in closed loop condition which reduces the switching losses and increases the output energy. © 2005 - 2014 JATIT & LLS. All rights reserved. Source

Sathyamurthy R.,Hindustan University | Sathyamurthy R.,Research and Consultancy | Nagarajan P.K.,Sa Engineering College | El-Agouz S.A.,Tanta University | And 2 more authors.
Energy Conversion and Management | Year: 2015

The main objective of this research is to increase the contact time of water in the basin to enhance yield of fresh water by using a semicircular absorber solar still with baffles. An experimental as well as theoretical investigation is carried out. The productivity and efficiency of present still are analyzed with the influence of the number baffles and the water flow rate. A good agreement between the experimental and theoretical results is observed. The results indicate that, the daily yield of present solar still is higher than that for conventional still approximately by 16.66%. The outlet water temperature present solar still is high subsequently, it can be coupled with multi-state of solar stills to increase productivity. Therefore, the present solar still can be sufficiently extended for other continuous solar desalination systems. Economic analysis concluded that, the payback period of the present model solar still is quicker while comparing it with other solar still. © 2015 Elsevier Ltd. All rights reserved. Source

E M.,Vivekanandha Institute of Engineering and Technology for Women
European Journal of Remote Sensing | Year: 2015

For the identification of deforestation, numerous techniques and features have been developed and used to maximize the segmentation accuracy. Choosing appropriate texture features and extraction methods are one of the most significant issues in remote sensing image applications. This work proposes a Modified Sum of Difference using diagonal texture feature extraction with multiresolution segmentation algorithm to maximize the segmentation accuracy. First, the Modified Sum of Difference using diagonal matrix (MSODDM) algorithm is applied to the input image; this divides the image into a number of coarse objects. Secondly, the multiresolution algorithm with the threshold value of 200 is applied to the coarse image produced by MSODDM for getting finer segmentation result. Finally, the accuracy of the segmented image is compared with the sample input image used in the experimental study. Thus, the proposed method generates more promising result of reaching 97.02% of segmentation accuracy, which results in better classification of remote sensing images in detecting deforestation. Source

Sangeetha M.,GTN Arts College | Rajendran S.,GTN Arts College | Sathiyabama J.,GTN Arts College | Krishnaveni A.,Yadava College | And 3 more authors.
Portugaliae Electrochimica Acta | Year: 2011

The inhibition efficiency (IE) of phyllanthus amarus extract (PAE)-Zn 2+system, in controlling corrosion of carbon steel in an aqueous solution containing 60 ppm of Cl -, has been evaluated by weight loss method. Weight loss study reveals that the formulation consisting of 2 mL of PAE and 25 ppm of Zn 2+ has 98% inhibition efficiency in controlling corrosion of carbon steel immersed in an aqueous solution containing 60 ppm of Cl -. Synergistic parameters suggest that a synergistic effect exists between PAE and Zn 2+. Polarization study reveals that this system functions as mixed type of inhibitor controlling the cathodic reaction and anodic reaction to an equal extend. AC impedance spectra reveal that a protective film is formed on the metal surface. The FTIR spectra reveal that the protective film consists of Fe 2+-phyllanthus complex. Source

Menaka E.,Vivekanandha Institute of Engineering and Technology for Women
International Journal of Applied Engineering Research | Year: 2014

The focus of the paper is to analyze the deforestation in different levels using a threshold based clustering algorithm. It underlines the percentage of degradation; it is a prime factor to predict forest fire. The functioning of the proposed algorithm is based on the cluster defined and the threshold calculated by the algorithm. Depends on the forest type, the cluster is defined. If the cluster is 3, it gives 3 levels forest cluster, otherwise if it is 5 the resulting forest regions are like as 0%-20%, 21%-40%, 41%-60%, 61%-80% and above 80% of dense. Secondly, the threshold value is calculated based on the mean and maximum of red pixel in input image, is used to perceive the precise dry pixel in each forest region. The calculated threshold value is applied to each cluster generated by the k-means algorithm and the experimental results indicate that the proposed algorithm KAT outperforms than the K-Means algorithm, Threshold algorithm, Watershed and Watershed with a threshold to compute the deforestation in different levels in remote sensing images. It can be a highly efficient algorithm to detect the possibilities of forest fire region, which in turn would be a reliable source of information to Forest Fire Management System to initiate preventive measures to curb the maximum destruction rate to be caused to the living organism. © Research India Publications. Source

Discover hidden collaborations