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Journal of Advanced Research In Engineering and Technology (JARET)
Editor in chief:Dr. S. Balasubramanian
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A Survey On Switching Median Filters For Impulse Noise Removal
Author:Sreejith L.Das,Alamelu Nachiappan.
Volume: 1 | Issue no: 1-2013 | Pagination: 58-63
Impulse noise is one of the major setbacks in digital image processing. Impulse noise can corrupt the images and also damage the fine details in the image. Various filtering algorithms are there to remove the impulse noise that is present in image during acquisition. Majority of the image denoising filters are based on the median filter. Survey on Variants of median filters like weighted median filter, adaptive switching median filter, triststate switching median filter, modified decision based unsymmentric tristate median filter are discussed in this paper.
Dynamic Analysis Of Plane Linkages For Agricultural Machineries Using Lagrange Equation
Volume: 1 | Issue no: 1-2013 | Pagination: 45-57
This paper outlines the objectives of the projects. The objectives of the project are to evaluate the dynamic response (velocities, acceleration and internal forces) of the linkage to different models and parameters of random loading and to compare different force distributions under different assumed conditions. The plane linkages used in sugar beet harvesting machine was selected. The equation of motion of SNS-3R (sugar beet linkage) was derived using the Lagrange equation of motion. To ensure the correctness of the derived equation, the Lagrange equation was verified by using Newton's second law of motion. It was found that both equations of motion derived by two methods identified above were identical, which means that the derivation is accurate. Although the angular displacement was of a major importance, the internal forces (shear force, normal force and bending moment) have been given the central attention and their expressions were derived by using the Newton's second law of motion. The main results are the distributions, variation, mean and standard deviation of angular displacement and the internal forces. It has been found that the angular displacement distributions and variations are the same irrespective of the condition applied and force distribution assumed. The mean for angular displacement under a specified condition turned out to be different for all force distribution assumed. The mean of the angular displacement does not depend largely on the force distribution assumed. The mean of all internal forces for a particular experimental condition are the same irrespective of the distribution assumed. The standard deviation of the internal forces for a particular condition is not the same for any distribution assumed.
Stability And Power Quality Improvement Of 1-φ Utility Grid Connected Pwm Inverter Using Ann With Hysteresis Current Controller
Author:M.Neelu Kumar, P.Bhaskara Prasad
Volume: 1 | Issue no: 1-2013 | Pagination: 36-44
Artificial neural-networks (ANN) are one of those words that are getting fashionable in the new era of technology. Current regulated PWM voltage source inverters used for synchronizing the utility grid with distributed generation source. Using ANN application with hysteresis current controller improving grid stability, active and reactive power control through voltage and frequency control etc., to the utility grid. ANN hysteresis current controller results are compared with conventional hysteresis controller. The studied system is modeled and simulated in the MATLAB.
Design And Fabrication Of Disc Type Hybrid Turbine-Pump
Volume: 1 | Issue no: 1-2013 | Pagination: 25-35
Integration of two types of viscous drag hydraulic machines is presented in this paper. Disc turbine and pump are well known for century, they have been used in many applications all around the globe. Fluid transportation and power generation is the key for this kind of product development. This prototype is made to explore the possibility of combining pump and turbine in one single casing model. Based on many literature review and simulation through computational fluid dynamic is used to arrive the model. The model is manufactured and tested; results were compared with the simulation results. A single circular casing model is used for operating both pump and turbine, with separate inlets and common outlet. AC electric motor is coupled with the model when operate with pump and the same coupling is used to drive a DC motor when turbine is in operation.
Modeling Analysis Of Upfc With Pss Using Sliding Mode Controller
Author:S.Sarada, P.Lakshmikanth, C.Ganesh
Volume: 1 | Issue no: 1-2013 | Pagination: 15-24
The unique capability of the Unified Power Flow Controller in multiple line compensation are integrated into a generalized power flow controller that is able to maintain prescribed and independently controllable, real power and reactive power flow in the line. We demonstrate the proposed technique on a single machine infinite bus system. In this paper, we propose UPFC with PSS design scheme based on multirate output feedback control technique. Using different plant rates including the former plant output information, sampling error at multiple sampling intervals is considered. As a result, control and stability performance can be improved.
Consultants? View Toward The Factors Affecting Time Overrun In Public Construction Projects
Author:Ibrahim Mahamid, Nabil Dmaidi
Volume: 1 | Issue no: 1-2013 | Pagination: 8-14
The study aims at identifying the factors affecting time overrun in public construction projects Saudi Arabia from consultant's viewpoint. To do so, 70 consultants working in public construction completed a structured questionnaire survey and the factors were ranked according to their levels of severity, frequency, and importance. 34 factors were identified through interview with some local construction experts and deep literature review. The analysis of the identified 34 factors indicates that the top five important factors affecting time overrun in public construction projects are: improper planning, poor labor productivity, additional works, rework, and lack of contractor experience. The results also indicate that the top five severe factors affecting time overrun in public construction projects in Saudi Arabia are: bid award for lowest price, poor labor productivity, improper planning, additional work, and lack of contractor experience. While the top five frequent factors are: rework, improper planning, changes in material types and specifications during construction, poor contract management, and poor resource management.
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