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Now showing items 1 - 2 of 2

  • A novel Tamil character recognition using decision tree classifier

    Raja, Selvakumar   John, Mala  

    Tamil is a South Indian language spoken widely in Tamil Nadu, one of the states of India. It is one of the oldest languages in the world, and the Tamil script is used to write the Tamil language in India, Sri Lanka, Singapore, and parts of Malaysia, as well as to write minority languages such as Badaga. This paper presents an efficient method for recognizing Tamil characters based on extracted features like horizontal lines, vertical lines, loops, and curves. The extracted features are fed to Back Propagation based Neural Network (BPNN) classifier system, Support Vector Machine (SVM) classifier, and Decision Tree (DT) classifier. The DT classifier system has achieved very good recognition rate on the Tamil character database and shows improved performance as compared to BPNN classifier and SVM classifiers.
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  • Comprehensive Study on the Effect of CuO Nano Fluids Prepared Using One-Step Chemical Synthesis Method on the Behavior of Waste Cooking Oil Biodiesel in Compression Ignition Engine

    Velmurugan, Ramanathan   Mayakrishnan, Jaikumar   Induja, S.   Raja, Selvakumar   Nandagopal, Sasikumar   Sathyamurthy, Ravishankar  

    Vegetable oil is considered as one among the promising alternatives for diesel fuel as it holds properties very close to diesel fuel. However, straight usage of vegetable oil in compression ignition (CI) engine resulted in inferior performance and emission behavior. This can be improved by modifying the straight vegetable oil into its esters, emulsion, and using them as a fuel in CI engine showcased an improved engine behavior. Waste cooking oil (WCO) is one such kind of vegetable oil gained a lot of attraction globally as it is generated in a large quantity locally. The present investigation aims at analyzing various parameters of single cylinder four stroke CI engine fueled with waste cooking oil biodiesel (WCOB), waste cooking oil biodiesel water emulsion (WCOBE) while the engine is operated with a constant speed of 1500 rpm. Furthermore, an attempt is made to study the impact of nanofluids in the behavior of the engine fueled with WCOB blended with nanofluids (WCOBN50). This work also explored a novel method of producing nanofluids using one-step chemical synthesis method. Copper oxide (CuO) nanofluids were prepared by the above mentioned method and blended with waste cooking oil biodiesel (WCOBN50) using ethylene glycol as a suitable emulsifier. Results revealed that brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) of WCOBN50 are significantly improved when compared to WCOB and WCOBE. Furthermore, a higher reduction in oxides of nitrogen (NOx), carbon monoxide (CO), hydrocarbon (HC), and smoke emissions were observed with WCOBN50 on comparison with all other tested fuels at different power outputs. It is also identified that one-step chemical synthesis method is a promising technique for preparing nanofluids with a high range of stability.
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