KUET Institutional Repository (Khulna University of Engineering & Technology)
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Effect of Differently Interpolated Geographical Data on WRF-ARW Forecast
No full textThis thesis is submitted to the Department of Mathematics, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Philosophy in Mathematics, April 2017.Cataloged from PDF Version of Thesis.Includes bibliographical references (pages 66-67).With the advancement of computing power now a days Numerical Weather Forecasting (NWP) has emerged as an important tool and is playing its role for short to medium even for long range weather forecasting. Like other models theWeather Research and Forecasting (WRF) model has three components, i) Pre-processing, ii) Model running and iii) Post-processing. At the preprocessing stage one has to decide/declare the date and time, the region of interest, grid spacing (in case of nested run parent-child ratio), map projection etc. In this stage the geographical data is placed to defined grids and blended with the meteorological data. In numerical calculation/prediction the final output depends on the input. Thus it is assumed that the output has dependencies on the input values assigned at the grids. The value at the grids are depending on the interpolation technique. In this thesis we have compared the results of different predicted parameters (temperature, sea level pressure (SLP), relative humidity, cumulus accumulated precipitation and wind speed) of different events (rainfall, temperature and cyclone) calculated on the basis of different interpolation techniques. For the purpose default results are compared with the results obtained by using 4-point, 16-point and nearest neighborhood interpolation techniques. For the comparison purpose graphical/visual difference is considered. After completion of the model running GrADS(Grid Analysis and Display System) has been used for the graphing purpose. It has been found that except SLP the results of different interpolation schemes have similar pattern though the shape of the patterns are different in size. But in the case of SLP there are tremendous difference in result with respect to change of interpolation scheme.Md. Shahifur RahmanMaster of Philosophy in Mathematic
Development of Standard Operating Procedure for a Combined Cycle Power Plant: A Case Study
No full textThis thesis is submitted to the Department of Industrial Engineering and Management, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Science in Engineering in Industrial Engineering and Management, August, 2017.Cataloged from PDF Version of Thesis.Includes bibliographical references (pages 61-63)This study is carried out to understand the effect of Standard Operating Procedure (SOP) in
a Combined Cycle Power Plant (CCPP). We chose Khulna 225MW CCPP as the study field.
The study is qualitative rather than quantitative in nature. Initially, operational system
practiced in this power plant was observed closely by participating with the operation team.
Afterwards, for some selective jobs SOP was developed, tested, corrected and released for
practical implementation. Sufficient training was conducted to habituate the operator for
using the SOP. Then a survey was carried out to understand the effect of SOP. In most of the cases outcomes of the study is in-line with the expected outcomes assumed initially during the study. That is, SOP is helpful to ease the operational process, to uniform the operational activities, to improve compliance related to organizational policy, HSE and
Legal Issues, to reduced trouble in decision making and to increase plant availability factors
in long run. However, some operators opined that in some cases SOP is not significantly
helpful and some operators found SOP makes no difference on some points. Operators with
more experience opined in every case that SOP is significantly helpful for reducing human
errorK.M.M. Resalat RajibMaster of Science in Engineering in Industrial Engineering and Managemen
De-noising of ECG signal using FIR filter and QRS detection
No full textThis thesis is submitted to the Department of Electronics and Communication Engineering, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Science in Electronics and Communication Engineering, May, 2017.Cataloged from PDF Version of Thesis.Includes bibliographical references (pages 82-86).Electrocardiogram (ECG) machines are usually used for medical diagnosis of heart
activities of human body now days. Every portion of ECG is very essential for the diagnosis
of different cardiac problems. But the amplitude and duration of ECG signal is usually
corrupted by different types of noise and interference based on interfaces between ECG
machines and human body. It can change the real amplitude and duration of the signal.
In electrocardiogram (ECG), noise removal and QRS complex play the vital role for
detecting various heart diseases. So, noise free and accurate QRS detection becomes very
important in ECG signal. In this thesis we proposed new algorithms which are able to make it
noise free and detect QRS complex in ECG signal. Generally, a noise free algorithm removes
the noisy signal and we have used Remez exchange algorithm for 1st algorithm, designed an
arbitrary magnitude with FIR filter for 2nd algorithm, FIR filter with window method for 3rd
proposed algorithm, We have also proposed moving average filter and moving average
weighted window, and an algorithm based on forward difference quotient and threshold for
corresponding algorithms respectively for noise elimination of ECG. QRS complex of noise
free ECG signal have been detected by proposed detection algorithm. The performance
parameters are SNR, MSE and Correlation and accuracy, sensitivity, specificity, precision are
used to justify the proposed noise free algorithm and QRS detection. The real data examples
and experimental results approve new algorithms and prove the robustness of the algorithms
which are more effective in ECG applications.Jannatul Robaiat MouMaster of Science in Electronics and Communication Engineerin
Numerical Investigation of Convective Heat and Mass Transfer Flow along a Vertical Porous Plate with Soret and Dufour Effects in the Presence of Induced Magnetic Field
No full textThis thesis is submitted to the Department of Mathematics, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Philosophy in Mathematics, August 2017.Cataloged from PDF Version of Thesis.Includes bibliographical references (pages 66-69).In this study the thermal-diffusion (Soret) and diffusion-thermo (Dufour) effects on combined heat and mass transfer mixed convection flow of viscous incompressible MHD electrically conducting fluid along a vertical porous surface have been considered under the effects of induced magnetic fields. An implicit Finite Difference numerical technique is adopted to obtain the solutions regarding the velocity, temperature, mass concentration and induced magnetic field and are presented for different selected values of the established dimensionless parameters. The similarity equations of the above mentioned problem are obtained by employing the usual similarity technique and Bousinesq approximation. Then the transformed set of partial differential equations has been solved numerically using the implicit finite difference numerical method. Numerical solutions are obtained for the velocity and temperature fields as well as the concentration distribution and induced magnetic field for different values of the physical parameters entering into the problem. The effects of these various involved parameters on the velocity and temperature fields, the concentration distribution and induced magnetic field have been investigated. Finally, the obtained results involving the effects of these physical parameters on the flow phenomena have been discussed with the help of graphs and tables. The numerical results have shown that the above mentioned effects have to be taken into consideration in the flow fields and in the heat and mass transfer processes.S. M. Mahathy HasanMaster of Philosophy in Mathematic