Browsing by Author "Rahman, Zillur"

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An enhanced method of initial cluster center selection for K-means algorithm
(19-Oct-2021) Rahman, Zillur; Hossain, Sabir; Hasan, Mohammad; Imteaj, Ahmed
—Clustering is one of the widely used techniques to
Analytical Methods to Investigate Exact Solutions for Space-Time Fractional Differential Equations Arising in the Real Physical Phenomena of Mathematical Physics and Biology
(University of Rajshahi, Rajshahi, 2021) Rahman, Zillur; Ali, M. Zulfikar; Roshid, Harun-or-
Fractional derivatives are most important to accurate nonlinear modeling of various real-world difficulties in applied nonlinear science and engineering incidents especially in the fields of crystal, optics and quantum mechanics even in biological phenomena. The investigation of exact solutions of such nonlinear models has great important to visualize the nonlinear dynamics. We consider the space-time fractional nonlinear differential equations for pulse narrowing transmission lines model, the space-time fractional Equal-width (s-tfEW) and the space-time fractional Wazwaz-Benjamin-Bona-Mahony (s-tfWBBM), complex Schrodinger and biological population models, the complex time fractional Schrodinger equation (FSE) and low-pass electrical transmission lines equation (ETLE) are studied with the effective unified method, Jacobi elliptic expansion function integral technique, generalized Kudryshov technique, modified simple equation (MSE) method respectively. As a result, we get some solitary wave solutions in the form of hyperbolic and combo hyperbolic-trigonometric :functions including both stable and unstable cases. We obtain kink wave, bright bell wave, dark bell wave, combo periodic-rogue waves, combo M-W shaped periodic-rogue waves in stable cases, and singular kink type in unstable solitonic natures. Lastly, we proposed an Improved Kudryashov method for solving any nonlinear fractional differential models. We apply the proposed approach to the nonlinear spacetime fractional model leading wave spread in electrical transmission lines (s-tfETL), the spacetime M-fractional Schrodinger-Hirota (s-tM-fSH) and the time fractional complex Schrodinger (tfcS) models to verify the effectiveness of the propose approach. The implementations of the introduced new technique on the models provide us periodic envelope, exponentially changeable soliton envelope, rational, combo periodic-soliton and combo rational-soliton solutions, which are much interesting phenomena in the nonlinear sciences. Beside the scientific derivation of the analytical findings, we represent the results graphically for clear visualization of the dynamical properties.
Automatic SIM block & unblock, trace a number & emergency utility contact
(BRAC University, 5/5/2007) Beacon, Shafiqul Kabir; Rahman, Zillur; Sohul, Munawwar Mahmud
At every step in our daily life, keeping contacts with people is the most essential thing to do. For this we need to carry things that help us to communicate with others, like mobile devices. With such devices, we can make our life simpler. The system that I have proposed is not only a new system to come up in the mobile device but also would worth a lot for our country people by its services. The significance of this proposed system can be understandable by its name - Automatic SIM Block and Unblock, Tracing a number and Emergency Utility Contact. It would allow customers to block or unblock their own SIM, to trace another being permitted mobile, or even would let one to know and inform about and to important utilities at emergency. All these procedures can be done from any mobile numbers, from anywhere at anytime. Hence providing more flexibility, less energy, expenses and time consuming, and even let the customer to feel secured about their own things. In every way the system would be very beneficial and profitable both to a user and an operator.
Learning computer programming using e-learning as a tool
(BRAC University, 2008-05) Alam, Asharf; Hossain, Saddam; Rahman, Zillur; Pathan, Risat Mahmud
This thesis report seeks to design idea for e-learning programming tools. An intelligent education system could change one’s life towards a better future. In this software design, we used Visual Basic programming language for making demo version. The main purpose of the software is to give basic ideas about the programming language for the new programmer. This software will create questions for the user and will evaluate those answers. There are different complexity levels such as beginner, advanced, and professional. Beginner users are those who are completely new in the computer programming area. There will be different sets of questions for the different types of users. From the user answer, we will evaluate the user’s level. When they complete all of the level successfully then we can say that he/she has a better idea about programming.
President Message at 10th Convocation of EWU 2011
(East West University, 2011-03-06) Rahman, Zillur
President's Message at 8th Convocation of EWU 2009
(East West University, 2009-04-07) Rahman, Zillur
President's Message at 9th Convocation of EWU 2010
(East West University, 2010-04-25) Rahman, Zillur