Sri Ramakrishna Engineering College

About: Sri Ramakrishna Engineering College is a based out in . It is known for research contribution in the topics: Computer science & Control theory. The organization has 1030 authors who have published 843 publications receiving 3822 citations.

An optimization technique for reducing the PAPR in MIMO-OFDM technique by using FPPC scheme

Abstract: In this practical world, MIMO (Multiple Input Multiple Output) system with OFDM technology plays a competent role in wireless transmission. It will transmit high speed data in delay scattering surroundings through multicarrier modulation that reduces multipath attenuation, in order that the spectral efficiency of the complete system is exaggerated. It realize its manner in digital acoustic and video broadcasting and fourth generation cellular systems. The obstacle during this approach is high peak to average power ratio (PAPR) that thunderous disturbs the quality of power amplifiers. There are unit varied modes to attenuate PAPR. In this survey, we tend to space unit close to switch views regarding selective mapping (SLM), clipping & filtering and partial transmits sequence (PTS) techniques to minimize the results of PAPR. In this paper we are exchanging our views about flexible peak power cancellation for reducing PAPR to a great extent.

Multi-QoS and Interference Concerned Reliable Routing in Military Information System

Abstract: Secured and trustable routing in military information system is a sophisticated task in which sharing of information with no distortion or collusion is important. Mobile ad hoc networking enables the military communication by forwarding the information to the corresponding nodes on the right time. In the available system, Neighborhood-based Interference-Aware (NIA) routing is performed over an environment of stabilized position node. This research cannot offer support to the military communication system where the troops of soldiers might have to move to different positions. This issue is resolved in the new research strategy by implementing the new framework known as Multi-Objective concerned Reliable Routing in Dynamic MANET (MORR-MANET). In this technical work, optimal routing is performed with due consideration to different QoS parameters making use of pareto-optimal approach. Once the optimal route path is found, interference is prevented through the monitoring of the information regarding the neighborhood. Moreover, this research work is also related to the path breakage due to the resource unavailability or node mobility, as observed in this research work making use of Modified Go-Back-N ARQ technique. The whole research is realized and thereafter shown in the simulation environment, and it is revealed that the proposed research methodology provides a better result, in comparison with the previous research work NIA. The proposed technique indicates better performance in terms of 13% better residual energy, 7% larger the number of live nodes, 13% least relative error compared to the available technique NIA.

Image Matching using Weighted Graph Matching Algorithm

Abstract: Graph matching (GM) is matching a collection of edges that has no common vertices in a graph. It is an essential problem in computer vision, biosciences, information technology, distributed control and facility allocation and has an important role in solving correspondence problems. Here, optimal graph matching problem for real time DNA datasets are considered. The Weighted Graph Matching and Maximum Weighted Graph Matching algorithms are used for deciding the optimal matching between two weighted graphs. Our work uses an analytic approach to optimize matching problem. The images are converted to adjacency matrices and by computing the Eigen decompositions of the adjacency matrices in case of undirected graphs or Hermitian matrices in case of directed graphs, a matching nearer to the best solution can be obtained once the graphs are satisfactorily nearer to one another.

Influences of flux‐cored arc welding consumables on dynamic fracture toughness (J1d) of armour grade Q&T steel joints

Abstract: Quenched and tempered (Q&T) steels are prone to hydrogen-induced cracking in the HAZ after welding. Austenitic stainless steel (ASS) welding consumables are traditionally used for welding of high hardness Q&T steels as they have higher solubility for hydrogen. The use of stainless steel consumables for a non-stainless steel base metal is not economical. In recent years, the developments of low hydrogen ferritic steel (LHF) consumables that contain no hygroscopic compounds are utilized for welding of Q&T steels The use of ASS and LHF consumables for armour grade Q&T steel will lead to formation of distinct microstructures in their respective welds. This microstructural heterogeneity will have a drastic influence in the dynamic fracture toughness of the armour grade Q&T steel welds. Hence, an attempt was made in this paper to study the influence of flux-cored arc welding consumables on dynamic fracture toughness (J 1d ) of armour grade Q&T steel joints. The flux-cored arc welding consumables have a significant effect on the dynamic fracture toughness of the armour grade Q&T steel welds. The joints fabricated using ASS flux-cored wires showed superior J 1d values than the joints fabricated using LHF consumables and the base metal.

A Modular Three Phase AC Voltage Controller for Induction Motor

Abstract: Three phase induction motor (IM) is widely used in the industries because of rugged construction. User needs to control speed of the motor depending on the desired speed and application. In this paper launching of speed control of 3-phase IM is controlled by 3-phase AC voltage controller by varying the voltage by pulsewidth modulation (PWM) technique. In olden days speed control was possible for DC motors only, but with the presence of power electronics converters such as AC regulators, inverters and cycloconverters, it has become possible to control the speed of induction motors. These days regulating the stator source voltage at a constant frequency is one of the modern and low cost methods in order to control the speed of induction motors near its nominal speed. The speed control of IM by 3-phase inverters, cycloconverters require forced commutation circuit, which is complicated and these presents high surge currents and surge voltages. But AC voltage controller makes use of line commutation and as such no complex commutation circuitry is required in this controller. The main application of this model is fan drives, domestic pump and industrial applications.