Nayak B.,Trdent Academy of Technology |
International Review on Computers and Software | Year: 2011
This paper deals with the overview of association rule mining algorithms in large databases used for especially business organizations where the amount of transactions and items plays a crucial role for effective decision making. Frequent item-set generation and the creation of strong association rules from the frequent item-set patterns are the two basic steps in association rule mining. It becomes very much tedious for mining the association rules as the data are growing instantaneously in every sphere of life. Therefore it becomes important to develop effective association rule mining techniques in such a way that interesting rules are mined effectively from large databases. In this paper we have analyzed different association rule mining techniques with its current directives for large databases. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.
Moharana J.,GITA |
Sengupta M.,BESU |
International Journal of Power and Energy Conversion | Year: 2015
The static synchronous compensator (STATCOM) is becoming increasingly popular in power system applications. Through reactive power compensation, supply side power factor at point of common coupling (PCC) can be improved to almost unity. The highlight of the present work is the practical implementation of such a scheme on a 10 kVA STATCOM laboratory prototype fabricated for the purpose. The linear model of the STATCOM is discussed, in which the current and DC-link voltage controllers have been separately designed. The performance of all the designed controllers are first simulated and then experimentally validated as mentioned. Excellent agreement between the simulated and experimental results demonstrates the effectiveness of the proposed control strategy. Copyright © 2015 Inderscience Enterprises Ltd.
Nayak S.K.,GITA |
Sahu S.,GITA |
International Journal of Engineering and Technology | Year: 2013
In the present work Karanja oil is used as a source for biodiesel production via base catalyzed transesterification and biodiesel produced in the process is mixed with an additive (Dimethyl Carbonate) in varying volume proportions to prepare a number of test fuels for engine application. Experiments were carried out on a four stroke single cylinder constant speed direct injection diesel engine under varying load condition to investigate about the performance and emission characteristics of the engine fuelled with the present test fuels. The results of investigation show increase in brake power and brake thermal efficiency with load for all test fuels. It is also noticed that the brake thermal efficiency increases with the percentage of additive in the test fuels. The brake specific fuel consumption decreases with increase in additive percentage in the test fuels. The exhaust gas temperature increases almost linearly with load for all test fuels and decreases with increase in additive percentage in the fuel. Results show that the CO and HC emissions tend to decrease with increase in additive percentage in biodiesel. The smoke and NOx emissions also decrease with increase in additive percentage in the biodiesel fuel.
Panda R.N.,Nalanda Institute of Technology |
Kumari Padhy S.,Siksha ‘O’ Anusandhan University |
Signal Processing | Year: 2013
This paper addresses the complexity problem associated with the QR decomposition algorithm, which is frequently used as a faster alternative to channel inversion in a MIMO scheme. Channel tracking can be employed with QR equalization in order to reduce the pilot overhead of a MIMO system in a non-stationary environment. QR decomposition is part of the QR equalization method and has to be performed in every instance that the channel estimate is obtained. The high rate of the QR decomposition, a computationally intensive technique, results in a high computational complexity per symbol. Some novel modifications are proposed to address this problem. Reducing the repetition rate of QR decompositions and tracking R (the upper triangular matrix) directly, while holding unitary matrix Q fixed, can significantly reduce complexity per symbol at the expense of some introduced error. © 2013 Elsevier B.V. All rights reserved.
Dash P.K.,Siksha ‘O’ Anusandhan University |
Dharmapandit O.,Siksha ‘O’ Anusandhan University |
Swain S.K.,G.I.T.A |
2015 IEEE Power, Communication and Information Technology Conference, PCITC 2015 - Proceedings | Year: 2015
This paper presents a time-frequency filtering approach suitable for current differential protection of transmission lines in a wide area power network. The current differential protection scheme efficiently discriminates between the internal and external faults in the protected zone of a transmission network and exhibits stability and robustness. For detecting the occurrence of a fault on the transmission line a cumulative sum average (CUSUM) technique is used and the fault classification and location are determined using the spectral energy of the average and differential currents based on a recent matrix version of the fast discrete S-transform. This new formulation uses intelligent frequency scaling, band pass filtering, and suitable interpolation techniques to reduce the computational overhead of the algorithm by almost 30 times in comparison to the earlier conventional S-transform. Further the new protection scheme will be a viable and competing one with the advent synchrophasors technology and wide area high speed communication and GPS systems. Also its viability is tested for the wide area network with a STATCOM placed at the middle of one of the transmission lines injecting reactive currents which requires the detection of the occurrence of the fault before or after the compensating device. © 2015 IEEE.
Nayak C.K.,GITA |
Das S.,VSSUT |
Smart Innovation, Systems and Technologies | Year: 2015
In communication medium a single fault will affect the complete system. So in the designing of Network-on-Chip (NoC) based systems the reliability is an important aspect. Also we have to concentrate on the performance improvement in the fault tolerant NoC architectures. In this paper, we are going to achieve high level performance by using hierarchical agents by proposing Fault-tolerant NoC architecture. The fault information will be collected and will be distributed after processing from these agents which are placed everywhere in the network. Along with that the permanent Faults information that occur in the interfaces of network, links and in different parts of the routers will be exploited from the enhanced fault tolerant and congestion aware routing method. © Springer India 2015.
Sahu S.,GITA |
Nayak S.K.,GITA |
Advanced Materials Research | Year: 2014
The non-convectional machining processes are those using thermal source of energy for the material removal. Among them Electrical discharge machining (EDM) or spark erosion machining is most important one. The important process parameters in this technique are discharge pulse on time, discharge pulse off time current and gap voltage. The values of these parameters significantly affect such machining outputs as material removal rate. In this paper, an axisymmetric thermo-physical finite element model for the simulation of single sparks machining during electrical discharge machining (EDM) process is exhibited. The model has been solved using ANSYS 11.0 software. A transient thermal analysis assuming a Gaussian distribution heat source with temperature-dependent material properties has been used to investigate the temperature distribution. Material removal rate was calculated for multi-discharge machining by taking into considerations the number of pulses. Comparison, analyzation of the theoretical result and experimental result by considering the same process parameters has been done, and the result is highly agreed between the experimental and theoretical value so the model is validated. © (2014) Trans Tech Publications, Switzerland.
Sahoo M.K.,GITA |
Swain K.,GITA |
Smart Innovation, Systems and Technologies | Year: 2015
In some secure communication system, to detect the frequently varied baseband signal, a digital down converter (DDC) with a variable digital filter is used. In this paper, a reconfiguration design process of DDC is discussed for a GSM application with the help of Xilinx system generator (XSG) on field programmable gate array (FPGA). The approach is based on hardware Co-simulation based on XSG platform which integrates itself with the Matlab based Simulink graphics environment and implemented on Virtex-II based xc2v200-4fg676 FPGA device. Optimal equiripple technique implements DDC which reduces the resource requirement. To solve the complexity, a novel type of polyphase decomposition structure is used. Keeping the view of the system performance, such as area and speed, this paper proposes a model which is implemented by using embedded multiplier, LUTs and BRAM of FPGA. It is seen that the proposed design consumes very less resources available on target devices. © Springer India 2015.
Nayak C.K.,VSSUT |
Rath S.,GITA |
Pradhan M.,GITA |
Smart Innovation, Systems and Technologies | Year: 2016
A wireless sensor network (WSN) is typically comprised of a large number of nodes spread over a large area sensors. Sensor nodes are small, low battery, limited storage and processing power. Each node is usually equipped with a wireless radio transceiver, a small micro-controller, a source of power sensors and multiple types such as temperature, light, pressure, sound, vibration nodes etc. These ways to communicate directly with network among themselves or through other nodes. The first objective is to collect data on WSN sensor nodes. If the data on the web passes through the one or more sensor nodes, power consumption in the first node differs from the second node. Therefore, the loaded nodes too quickly lose battery power and shut down. Imagine this situation happens to a group of neighboring nodes and fall of premature death, leading energy gap in the network. Energy gap affects other nodes in the network nodes that share the power load port has a load to the other nodes in the network. As a result, life of a network will end soon. Our research is aimed at maximizing the coverage area, increasing the detection range of remaining sensor nodes when a node fall in premature death, to prevent the formation of holes in the supply network of wireless sensors. © Springer International Publishing Switzerland 2016.