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Articles by M. K. Hasan
Total Records ( 2 ) for M. K. Hasan
  M. K. Hasan , J. Sulaiman , S. Ahmad , M. Othman and S. A.A. Karim
  Problem statement: Development of mathematical models based on set of observed data plays a crucial role to describe and predict any phenomena in science, engineering and economics. Therefore, the main purpose of this study was to compare the efficiency of Arithmetic Mean (AM), Geometric Mean (GM) and Explicit Group (EG) iterative methods to solve system of linear equations via estimation of unknown parameters in linear models. Approach: The system of linear equations for linear models generated by using least square method based on (m+1) set of observed data for number of Gauss-Seidel iteration from various grid sizes. Actually there were two types of linear models considered such as piece-wise linear polynomial and piece-wise Redlich-Kister polynomial. All unknown parameters of these models estimated and calculated by using three proposed iterative methods. Results: Thorough several implementations of numerical experiments, the accuracy for formulations of two proposed models had shown that the use of the third-order Redlich-Kister polynomial has high accuracy compared to linear polynomial case. Conclusion: The efficiency of AM and GM iterative methods based on the Redlich-Kister polynomial is superior as compared to EG iterative method.
  M. Y. Sarker , Ferdouse Begum , M. K. Hasan , S. M. Raquibullah and M. A. Kader
  The experiment was conducted to know the effect of different source of nutrients and mulching on the growth and yield of cabbage. The experiment consisted of four levels of nutrients and three mulching. Sources of nutrients had significant effect on most of the parameters studied. The plants which received organic + inorganic fertilizers produced the highest (79.01 t ha-1) marketable yield, whereas plants having no fertilizer gave yield of 30.65 t ha-1. Mulching had no marked effect on harvest index, but had significant effect on rest of the parameters studied. The use of black polythene sheet mulch produced the highest marketable yield (70.24 t ha-1) and the lowest (45.13 t ha-1) in this respect was observed without mulch. The treatment combination of organic + inorganic fertilizers with black polythene sheet mulch gave the highest marketable yield (97.83 t ha-1) of cabbage.
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