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Vikhe P.S.,Pravara Rural Engineering College | Thool V.R.,Shri Guru Gobind Singhji Institute of Engineering and Technology
2016 International Conference on Signal and Information Processing, IConSIP 2016 | Year: 2016

Cancer detection at primary stage is the only solution, to reduce the death rate among the womens, due to breast cancer. Hence, screening of mammograms for detection of masses is essential, which is crucial task for the radiologist, due to variation in contrast and homogeneous structure of the masses and surrounding breast tissue. Therefore, denosing and enhancement of the mammograms using wavelet shrinkage and homomorphic filtering is presented in this paper. The approach contains, artifact suppression using threshold technique in pre-processing. Then wavelet transform is applied on the pre-processed mammogram, the wavelet shrinkage operator is applied on the detail coefficients for denosing and homomorphic filtering is applied on approximate coefficients for enhancement of mammograms. Finally, an inverse wavelet transform is taken to obtain the denoised and enhanced mammograms. The obtain results of the presented method gives better visibility for suspicious masses. © 2016 IEEE.


Parvat B.J.,Pravara Rural Engineering College | Patre B.M.,Shri Guru Gobind Singhji Institute of Engineering and Technology
11th IEEE India Conference: Emerging Trends and Innovation in Technology, INDICON 2014 | Year: 2015

This paper presents sliding mode controller design based on decoupling approach for multivariable process. The performance of proposed controller is experimentally verified on multivariable coupled tank system. The controller and decoupler are designed from process model obtained from fundamentals and experimental step response data. SMC is designed using linear sliding surface and stability of the system can be approximately analyzed via Lyapunov function method. A process decoupled through decouplers consisting higher order elements represented in the form of first-order-plus-dead-time (FOPDT) model using model reduction method. The closed-loop system performance and robustness is verified using Matlab/Simulink and NI DAQ card interface with multi-variable coupled tank process. Thus the proposed method is effective despite the effect of exogenous disturbance. © 2014 IEEE.


Gaikwad R.W.,Pravara Rural Engineering College
Journal of the University of Chemical Technology and Metallurgy | Year: 2011

This paper deals with the removal of copper ions from wastewater systems by using activated carbon derived from coconut shell. It was found that the adsorption follows first order kinetics and is slightly endothermic. Standard adsorption isotherm, like Langmuir and Freundlich were used to represent the experimental data. The external mass transfer coefficient has been determined for the process under the influence of a number of variables including initial concentration, temperature, pH and contact time. Enthalpy calculation has been done for the process too. An equilibrium curve has been plotted for the calculation of the amount of carbon required and it was found that there was good agreement between experimental and analytical values.


Kadu C.B.,Pravara Rural Engineering College | Patil C.Y.,College of Engineering, Pune
2015 International Conference on Industrial Instrumentation and Control, ICIC 2015 | Year: 2015

In this paper we designed a Fractional order controller for level control system. Based on experimental model of the process, the different tuning rules have been computed and compared in order to minimize the integral square error with a constraint on the maximum sensitivity. To assess the controller performance with achieved performance, we tested the robustness of the system for process model stability. By comparing the results obtained for integer order controller (IOC) and fractional order controller (FOC), it is shown that fractional order controller gives better result for an obtained process model. © 2015 IEEE.


Nehe N.S.,Pravara Rural Engineering College | Holambe R.S.,Shri Guru Gobind Singhji Institute of Engineering and Technology
Eurasip Journal on Audio, Speech, and Music Processing | Year: 2012

In this article, new feature extraction methods, which utilize wavelet decomposition and reduced order linear predictive coding (LPC) coefficients, have been proposed for speech recognition. The coefficients have been derived from the speech frames decomposed using discrete wavelet transform. LPC coefficients derived from subband decomposition (abbreviated as WLPC) of speech frame provide better representation than modeling the frame directly. The WLPC coefficients have been further normalized in cepstrum domain to get new set of features denoted as wavelet subband cepstral mean normalized features. The proposed approaches provide effective (better recognition rate), efficient (reduced feature vector dimension), and noise robust features. The performance of these techniques have been evaluated on the TI-46 isolated word database and own created Marathi digits database in a white noise environment using the continuous density hidden Markov model. The experimenta results also show the superiority of the proposed techniques over the conventional methods like linear predictive cepstral coefficients, Mel-frequency cepstral coefficients, spectral subtraction, and cepstral mean normalization in presence of additive white Gaussian noise. © 2012 Nehe and Holambe; licensee Springer.


Misal S.A.,Pravara Rural Engineering College | Gaikwad R.W.,Pravara Rural Engineering College | Dhirendra Dr.,Pravara Rural Engineering College | Sathe V.S.,Dr. Babasaheb Ambedkar Technological University
International Journal of ChemTech Research | Year: 2011

The first order plus time delay (FOPTD) model was considered and the improved relay tuning method considering higher order of harmonics (N) was applied for tuning to calculate the corrected ultimate gain (Ku). This corrected value was used to estimate PID parameters by Ziegler-Nichols (ZN) method. Then these PID parameters were considered for Taguchi orthogonal array (OA) and their three different values were considered. The Taguchi Method was applied to estimate the optimum values of PID parameters. The closed loop response was obtained using these optimum values of PID parameters and compared with that of conventional method and Padmasree method. It was found that the Integral Square Error (ISE) for conventional, Padmasree method and proposed method are 27.43, 27 and 7.9 respectively and hence the proposed method gives better performance.


Talnikar V.D.,Pravara Rural Engineering College | Talnikar V.D.,Dr. Babasaheb Ambedkar Technological University | Mahajan Y.S.,Dr. Babasaheb Ambedkar Technological University
Korean Journal of Chemical Engineering | Year: 2014

Chemical process industries convert raw materials into useful products. Acids, among other chemicals, are used in many industries as reactants, solvents and also as catalysts in a few instances as well. Resulting streams are dilute, from which the acids must be recovered. For recovery, many technologies can be used by which acids can be regained as such or can be converted into other value-added products like esters. Membrane processes and biological processes are being researched academically and practiced industrially. These have their own advantages and disadvantages in view of conversion, energy consumption etc. These are not always advantageous and hence an alternate process technology is necessary like reactive separation (RS). RS is advantageous especially when the acid is to be converted to other useful products by reaction, due to additional advantages or because no other technology is well suited or due to cost considerations alone. Conventional process technologies use the reactor configuration followed by the subsequent separation sequence. This approach can sometimes suffer from lesser conversion, difficulties in separation etc. To overcome these problems, RS has an edge over other processes in terms of the recovery of the useful compounds. Reactive distillation (RD), reactive extraction (RE) and reactive chromatography (RC) are the separation technologies that can be useful for acid recovery in an economically feasible way. This review covers the various processes of acid recovery along with the recent work in the field of reactive separations. © 2014, Korean Institute of Chemical Engineers, Seoul, Korea.


Gaikwad R.W.,Pravara Rural Engineering College
Electronic Journal of Environmental, Agricultural and Food Chemistry | Year: 2010

Acid mine drainage (AMD), characterized by low pH and high concentrations of sulfate and heavy metals, is an important and widespread environmental problem related to the mining industry. Active treatments have received much attention lately as promising method for AMD treatment. They offer advantages such as high metal removal at low pH, stable sludge, and recovery of metals. Ion Exchange is the desired mechanism of contaminant removal; however, many mechanisms including adsorption reverse osmosis of metal occur in active treatments. The efficiency of active treatment is high. The most important component is the selection of resins and operating parameters. The performance of field ion exchangers can also be limited by AMD load and metal toxicity. Several studies conducted to find the bestsuited resin are reviewed. Moreover, critical parameters for design and long-term operation are discussed. Additional work needs to be done to properly assess the long-term efficiency of Ion exchanger and the metal removal mechanisms.


Parekar N.N.,Pravara Rural Engineering College | Kadu C.B.,Pravara Rural Engineering College | Parvat B.J.,Pravara Rural Engineering College
Proceedings - 2015 International Conference on Computational Intelligence and Communication Networks, CICN 2015 | Year: 2015

In many Industrial applications, Boiler drum level is a critical variable in the safe operation of a boiler. A low drum level risks uncovering the water tubes and exposing them to heat stress and damage. High drum level risks water carryover into the steam header and exposing steam turbines to corrosion and damage. Because of this nonlinear function and uncertainties of a boiler system, PID Controller cannot maintain water level properly. So in this paper we have design a Modified Model Reference Adaptive Controller (MRAC) to overcome the uncertainties and nonlinearities and gives desired output. Simulation results show better performance of Modified MRAC as compare to MRAC and PID. Modified MRAC Shows improved response on the basis of rise time, settling time and overshoot. © 2015 IEEE.


Gaikwad R.W.,Pravara Rural Engineering College | Sapkal V.S.,Sant Gadge Baba Amravati University | Sapkal R.S.,Sant Gadge Baba Amravati University
Acta Montanistica Slovaca | Year: 2010

This paper discusses the methodology used to determine the optimal ion-exchange column size to process all separate batches of feeds from acid mine drainage wastewater. The optimal design ensures the best utilization of resin material and therefore results in a minimum amount of spent resins. Ion exchanger materials have been studied for removing heavy metals from a metal bearing wastes. For the current treatment, a facility has been designed for the removal of heavy metals from the acid mine drainage (AMD) waste by the ion-exchange technology.

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