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Performance Evaluation of AODV Using Fuzzy Logic to Reduce Congestion in MANET
Vikas Thakur,Laxmi Shrivastava,Sarita S.Bhadauria 사단법인 인문사회과학기술융합학회 2015 예술인문사회융합멀티미디어논문지 Vol.5 No.5
Mobile ad-hoc network is an infrastructure less network as it doesn’t follow any particular network topology. In MANET congestion is a major problem in small size networks congestion’s effect is low as compared to the large size networks. Congestion degrades the performance of overall network drastically. Many algorithms have been proposed to handle the congestion famous one are the active que management algorithms (AQMs). But still there is no universally accepted solution for it. In this paper a congestion control solution is devised using fuzzy logic controller. In this node density and load are taken as input and packet drop probability as output, which is effective to control congestion in large networks.
Pradeep Singh,Vikas Shrivastava,I. B. Singh,D. P. Mondal 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.6
Three group of porous Ti4Al4Co samples made of (i) unmilled powder and vacuum sintered (S1), (ii) milled powder andvacuum sintered (S2), and (iii) milled powder sintered in open atmosphere (S3) were prepared. Phase change, crystallite sizeand lattice strain variations due to powder milling and sintering were examined by SEM and XRD. To evaluate mechanicalproperty, alloy samples were subjected to the uniaxial compression test. For corrosion analysis, Tafel plot was plotted usingelectrochemical corrosion system in simulated body fluid (SBF) as electrolytic medium. From the obtained results, it wasfound that significant microstructural transformation takes place due to milling and change in sintering atmosphere. SampleS1possessed 139 MPa compressive strength, which was about 48% and 76% higher than samples S2and S3respectively. Corrosion current density for S3was found as 5.5 ± 0.3 μA/cm2 which is 7 and 12 times lower than S2and S1samples.
Vishakha Dayal Shrivastava,Vandana Vikas Thakare 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.11
In the present paper analysis of performance parameters i.e., insertion loss and return loss of microstrip Low Pass Filter with open stub using Artificial Neural Networks has been presented. The Artificial neural network is used in predicting the performance parameters of the low pass filter with open stub as a function of its stub length. Levenberg –Marquardt training algorithms of FFBP-ANN. (feed forward back propagation Artificial Neural Network), Layer Recurrent-ANN and CFBP-ANN (cascaded forward back propagation Artificial Neural Network) has been used to implement the neural network models. Simulated values for training and testing the neural network are obtained by analysing the LPF structure by the use of CST Microwave Studio Software. Comparison of mean square error obtained from different ANN networks concluded that CFBP-ANN gives satisfactory result as compare to FFBP-ANN and Layer Recurrent ANN. The testing of output of neural model is found good agreement with simulated output.
Urvashi Verma,Vikas Thakur,Poolla Rajaram,A. K. Shrivastava 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.1
A series of nanocrystalline thin films of cadmium zinc sulphide(Cd1-xZnxS) solid solution were deposited on glass substrates usingspray pyrolysis. Cadmium chloride (CdCl2), zinc chloride (ZnCl2) andthiourea (NH2CSNH2) were used as the sources of Cd, Zn and Srespectively. The films were characterized using structural, morphologicaland optical techniques. X-ray diffraction (XRD) studies show thatthe films of Cd1-xZnxS are polycrystalline and single phase having thewurtzite structure. The crystallites in the thin films of pure CdS possesspreferred crystallographic orientation along the <002> direction. Thepreferred orientation of crystallites in the Cd1-xZnxS films changes from<002> to <101> with increase in Zn concentration. The latticeparameters of Cd1-xZnxS decrease with increase in Zn concentration. Scanning electron microscopy (SEM) and atomic force microscopy(AFM) studies show that the surfaces of the films are smooth and areuniformly covered with nanoparticles. Energy dispersive analysis of xrays(EDAX) results reveal that the grown films have goodstoichiometry. Optical transmission spectra confirm the good qualityof the Cd1-xZnxS films.