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Decision Making For Vertical Handoff In Heterogeneous Wireless System
V.Sivasankaran,V.Nagarajan,R.Senthil 대한전자공학회 2015 ITC-CSCC :International Technical Conference on Ci Vol.2015 No.6
In upcoming world the communication among heterogeneous wireless networks is a challenging task. Since the access technologies of various networks are different and while interoperable operations, some technical issues may occur. Handoff is an important method can provide solution for making interoperability among heterogeneous networks. Handoff method is purely depends on the attributes of the network such as bandwidth, delay, signal quality, reliability, and energy, access cost and so on. Handoff decision can be obtained by investigating the attribute values and various MADM methods such as SAW, MEW, TOPSIS and GRA are proposed already. In this paper EMADM - [Extended Multiple Attribute Decision Making] approach is proposed to choose the optimized attribute values for decision making using AIS-[Artificial Immune System]. Performance is evaluated by analyzing and comparing the obtained performance metrics with the existing approaches.
EXISTENCE OF SOLUTIONS FOR DOUBLE PERTURBED IMPULSIVE NEUTRAL FUNCTIONAL EVOLUTION EQUATIONS
V. VIJAYAKUMAR,S. SIVASANKARAN,M. MALLIKA ARJUNAN 한국산업응용수학회 2011 Journal of the Korean Society for Industrial and A Vol.15 No.4
In this paper, we study the existence of mild solutions for double perturbed impulsive neutral functional evolution equations with infinite delay in Banach spaces. The existence of mild solutions to such equations is obtained by using the theory of the Hausdorff measure of noncompactness and Darbo fixed point theorem, without the compactness assumption on associated evolution system. An example is provided to illustrate the theory.
Effect of heating location and size on mixed convection in lid-driven cavities
Sivakumar, V.,Sivasankaran, S.,Prakash, P.,Lee, J. Pergamon Press ; Elsevier Science Ltd 2010 COMPUTERS & MATHEMATICS WITH APPLICATIONS - Vol.59 No.9
A numerical study is performed to analyze the mixed convection heat transfer and fluid flow in lid-driven cavities with different lengths of the heating portion and different locations of it. The left wall has been heated fully or partially to a higher temperature, whereas the right wall is maintained at a lower temperature. Three different lengths of the heating portion and three different locations of it are used along the hot wall. The remaining portions of the left wall, and the top and the bottom walls of the cavity are insulated. The finite volume method is used to discretize the governing equations which are then solved iteratively. The velocities and pressure are coupled by the SIMPLE algorithm. Results are presented graphically in the form of streamlines, isotherms and velocity profiles. It is concluded that the heat transfer rate is enhanced on reducing the heating portion and when the portion is at middle or top of the hot wall of the cavity.