Nagesh K.N.,Middle East College |
Satyanarayana D.,RGMCET |
Poojary N.,Middle East College |
Ramiah C.,Middle East College |
International Conference on Advanced Communication Technology, ICACT | Year: 2013
With the growing importance of wireless ad-hoc networks (particularly, in applications such as wireless local area networks, and ad-hoc sensor networks), it is important to develop an understanding of the isolated node in ad-hoc network with border effect. However it is a challenging task owing to the fact that such analysis must take into account the interactions between wireless physical layer, radio propagation and multiple accesses. Connectivity is one of the important features of wireless sensor network. The nodes are said to be connected in a network if their deterministic distance is less than transmission radius. In this paper, major issues in the probability analysis of isolated node in wireless ad-hoc sensor networks with border effect are presented. Additionally, the associated topics like fading and capacity scaling in different channels are surveyed. The results are obtained using MATLAB communication tool for different values of node density, number of nodes for different channels and comparison of these channels are discussed. © 2013 GIRI.
2016 Symposium on Colossal Data Analysis and Networking, CDAN 2016 | Year: 2016
Digital image compression technology is of special interest for the fast transmission and real-time processing of digital image. However image compression is a trend of research grown for a long time and there are multiple sophisticated approaches which significantly improve the compression rate and down grade computation time, a basic comparison with the aspect of storage on cloud environment is required. This work analyzes about the background of image compression, including when image compression is needed, categories of techniques and their properties. However compression uses many algorithms that store an exact representation or an approximation of the original image in a smaller number of bytes that can be expanded back to its uncompressed form with a corresponding decompression algorithm. This work majorly focuses on analyzing the impact of generic image compression techniques for high data loads on cloud storage services. © 2016 IEEE.
Sreenivasulu U.,Mits |
Journal of Theoretical and Applied Information Technology | Year: 2016
The exponential growth observed in the arena of wireless access technologies predominantly in the IEEE 802.16 networks put forth’s a large overhead in the uplink scheduling schemes particularly when rendering real time services. This paper introduces an evolutionary computation based uplink scheduling scheme (ESS) with Quality of Service (QoS) gurantee. A service threshold time is introduced in the ESS scheme to meet the QoS requirements and it determines the adaptive weights assigned to the service. The base station based on the weights ascertains the modulation scheme required to evade QoS violation and constructs the scheduling set. In addition of the adaptive weights the channel interference parameters is also considered to construct the scheduling set. The scheduling set is optimized to achieve the desired QoS parameters utilizing evolutionary computation techniques. The performance of ESS scheduling scheme is evaluated and the results obtained not only prove higher slot success rates, higher system throughput but also prove its QoS provisioning competence and its efficiency over an existing scheduling scheme. © 2005 - 2016 JATIT & LLS. All rights reserved.
Narasimhamu K.L.,A.I.T.S |
Venugopal Reddy V.,JNTUCE |
Rao C.S.,National Institute of Technology Warangal
International Review on Modelling and Simulations | Year: 2015
In this paper, we present heuristic approach to optimize buffer allocation in manufacturing system with tandem, split and merge topologies. Finite Closed queuing network approach is used to represent manufacturing systems. An attempt is made to find near optimal buffer allocation to minimize cost function in unlimited space buffer allocation problem. Expanded Mean Value Analysis is used to evaluate the objective function of closed queuing network. Particle Swarm Optimization is used as generative technique to optimize the buffer allocation. Numerical experiments are shown to explain the effectiveness of procedure. © 2015 Praise Worthy Prize S.r.l.-All rights reserved.
Gopal N.R.,BEC |
Desalination | Year: 2011
The single-objective optimization study by Satyanarayana and Bhattacharya (2003)  on removal of volatile organics from aqueous solution by single stage pervaporation without recycling has been extended by treating it as a multi-objective optimization problem. The various costs of the process namely-initial capital cost, feed pumping cost, vacuum and condensation cost and membrane replacement cost constitute the objective functions. The present work attempts to explore the pervaporation process economics by employing artificial intelligence method of non-dominated sorting genetic algorithm-II (NSGA-II). The cost of feed pumping offers significant trade-off with the costs of initial capital or vacuum and condensation. Although to a lesser extent, the trade-offs are also available between the costs of initial capital and vacuum and condensation. The results from this study clearly establish that the major costs for removal of volatile organics from water are feed pumping, initial capital, and vacuum and condensation. © 2011 Elsevier B.V.
Pandu Ranga Reddy G.,G.P.C.E.T |
Vijaya Kumar M.,J.N.T.U.C.E
Journal of Electrical Engineering | Year: 2015
Renewable energy is catching people's attention with increasing global energy consumption and noticeable environmental pollution across the globe. Wind energy is the one of the most available and exploitable forms of renewable energy. Winds blow from a region of higher atmospheric pressure to one of lower atmospheric pressure. In variablespeed wind turbines grid synchronization is possible at any operational speed. For this, it is necessary to operate the converter station with effective modulation technique. This paper presents the analysis of variable speed wind energy conversion system employing double fed induction generator with SPWM and SVPWM type converters. The MATLAB/SIMULINK software is used for simulating the models.
Kumar K.S.,JNTUCE |
Asia-Pacific Journal of Chemical Engineering | Year: 2011
Pervaporation processes are being increasingly adopted for environmental applications, and also for developments in many industrial reactions and their reactor systems. This study is related to pervaporation-facilitated esterification. A parametric study was carried out in order to provide a fundamental understanding of the reactor behaviour. A batch reactor integrated with a pervaporation unit was selected as the model system. The model validity was confirmed by comparison with literature data. Simulations demonstrated that conversions exceeding equilibrium limits can be achieved by using pervaporation to remove water from the reaction mixtures, and that complete conversion of one reactant is possible when the other reactant is present in excess. Simulations also showed that conversion was less effected by the presence of water, which can be either in the reaction medium or as an impurity of the reacting reagent. The influence of several process parameters on reaction performance is discussed; for example membrane permeability, membrane area, volume of the reaction mixtures, temperature, excess reactant versus conversion, and water concentration in the reactor. Copyright © 2010 Curtin University of Technology and John Wiley & Sons, Ltd.
Kumar K.V.,JNTUCE |
ACM International Conference Proceeding Series | Year: 2011
MANET (Mobile Ad Hoc Networks) is a wireless network in which all movable nodes can communicate with each other without depend on a fixed infrastructure. IP address is also used in MANETs, a unique IP address should be assigned to each node. Therefore, IP address auto-configuration schemes have been developed to remove the overhead of manual configuration. Mobility is one of the reasons for partitioning of the network. When a node having unique IP address in one partition, moves into another partition, there may arise a chance of duplication of the IP address. Since, IP address has to be unique, address conflicts need to be detected through a DAD (Duplicate Address Detection) procedure. This paper mainly focused on passive DAD schemes such as LOC-SD-INT (Location Source Destination with Intermediate nodes) over DYMO routing protocol. In this paper improved accuracy of detecting address conflicts, improved detection success ratio and reduced detection delay to detect address conflicts has been achieved. Through extensive simulations using the ns-2 simulator, PDAD schemes verified and better results are achieved when compared to the PACMAN scheme. By using PDAD schemes better throughput can be obtained and hence quality of service improved. The performance evaluations and results are analyzed and verified by using NS 2 (Network Simulator 2) simulator and compared with the results of existing method PACMAN (Passive Auto Configuration for Mobile Ad Hoc Networks). Copyright © 2011 ACM.
Ramana T.,HP Global Soft Ltd |
Ganesh V.,JNTUCE |
International Journal on Electrical Engineering and Informatics | Year: 2013
The proposal of this paper is on a simple and fast distribution load flow solution algorithm. The proposed method fully exploits the radial structure of the network and solves the distribution load flow directly using the single dimension vectors. An effective data structure is proposed to identify lines and number of lines available beyond the particular line. Using this concept, power summations are calculated to obtain the distribution load flow solution. Unlike other traditional methods, the proposed method consider the effective convergence approach which is not only simple and fast but also is efficient from time perspective and needs very less memory for any size of the distribution system compared with the existing methods. The proposed concept was tested on standard distribution system and results are promising and have great potential for applications in the distribution automation.
Kusagur A.,Jawaharlal Nehru Technological University |
Kodad S.F.,Krishnamurthy Institute of Technology and Engg |
Sankar Ram B.V.,JNTUCE
Journal of Electrical Systems | Year: 2010
This paper presents a novel design of a Takagi-Sugeno fuzzy logic control scheme for controlling some of the parameters, such as speed, torque, flux, voltage, current, etc. of the induction motor. Induction motors are characterized by highly non-linear, complex and time-varying dynamics and inaccessibility of some of the states and outputs for measurements and hence it can be considered as a challenging engineering problem. The development of advanced control techniques has partially solved some of the induction motor's speed control problems; because they were sensitive to drive parameter variations and the performance may deteriorate if conventional controllers are used. Fuzzy logic based controllers are considered as potential candidates for such an application. Further, the Takagi-Sugeno control strategy coupled with fuzzy logic rule based approach when employed to the induction motor yields excellent results compared to the other methods as this becomes a hybrid & integrated method of approach. Such a mixed implementation leads to a more effective control design with improved system performance, cost-effectiveness, efficiency, dynamism, reliability & robustness. Due to the usage of the TS-FLC concept in closed loop with the plant, the dynamic characteristics of the AC drives increases as the developed strategy does not require the mathematical model of the controller unlike that of the conventional electrical drive controller, which uses the mathematical model, which is the highlight of the paper. The sudden fluctuation or change in speed & its effect on the various parameters of the dynamic system is also considered in this paper. The designed controller not only takes care of the sudden perturbations in load torque & speed, but also brings back the parameters to the reference or the set value in fraction of seconds, thus exhibiting the robustness behavior. In other sense, the designed controller is robust to parametric variations. The closed loop speed control of the induction motor using the above technique thus provides a reasonable degree of accuracy which can be observed from the simulation results depicted at the end. Simulink based block model of induction motor drive was developed & used for the simulation purposes. Further, its performance is thereby evaluated for the control of various parameters. The method presented in this paper provides robustness of the induction machine towards the parametric variations compared to the conventional speed control of induction motor drives & has got a faster response time or settling times. The simulation results presented in this paper show the effectiveness of the method developed & have got a wide number of advantages in the industrial sector & can be converted into a real time application using some interfacing cards. © JES 2010.