Kasunpa Abeywardena . Gayan Dilantha Illeperuma

Received in final form on January 22, 2022

Abstract : Timetabling is the process of allocating time for planned activities orderly, to bring an optimum solution, without violating any hard constraints and with minimum soft constraint violations. It portrays a difficult optimization problem. There exists many commercial software with general features for this task. However, those cannot be adopted into The Open University of Sri Lanka due to its unique, complex requirements. This research paper presents a genetic algorithm-based MATLAB program which ... >>More

    Views: 347     Downloads: 21

Lorraine Dehoedt . J.K. Wijerathna

Received in final form on January 22, 2022

Abstract : Modelling the term structure of interest rates is one of the most challeng- ing topic in the recent literature of quantitative finance. This research employed a quantitative research design to determine the most suitable term structure model to estimate the Sri Lankan yield curve. To achieve this, we considered only primary market treasury securities issued by the Central Bank of Sri Lanka from Jan-2014 to Dec-2019 on weekly basis. The Nelson-Seigel models were calibrated and compared using the ... >>More

    Views: 72     Downloads: 7

Vishmi Fernando . Anuradha Mahasinghe

Received in final form on January 22, 2022

Abstract : We investigate the possibility of reformulating the puzzle of Battleship Solitaire as a quadratic unconstrained binary optimization problem, in order for the problem to be acceptable to a quantum annealer. Starting from a linear integer programming formulation, we develop two binary quadratic programs and compare them. ... >>More

    Views: 119     Downloads: 1

Claus Fieker . Jayantha Suranimalee

Received in final form on January 22, 2022

Abstract : In this paper, we present a deterministic algorithm for solving a non-square linear system over rationals and number fields. When the solution is not unique, we compute a basis for the kernel to normalize the solution. In this computation, we use a modified version of Dixon's algorithm. We rigorously assess its complexity as O~(m3d2 + m2nd + m2d5) operations over Z, whereas the Gaussian method takes O~(m3n2d2) operations to solve a linear mxn system Ax = b over number field K of degree d. ... >>More

    Views: 101     Downloads: 3

T. D. Gamage. D.U.J. Sonnadara. S. Jayasinghe. S. Basnayake

Received in final form on January 22, 2022

Abstract : This study is to identify the best set of physics options in simulating the daily rainfall under the influence of the cyclone "Amphan" using Weather Research and Forecasting (WRF). Twelve different combinations of physics options are experimented. Pattern correlation between the simulated and satellite measured rainfall obtained using Global Precipitation Measurement (GPM) is calculated for each experiment as a measure of simulation accuracy. In general the intensity of the simulated rainfall co ... >>More

    Views: 82     Downloads: 4

J.C. Hapugoda . M.R. Sooriyarachchi

Received in final form on Jan 22, 2022

Abstract : When data with correlated responses are available, joint models may provide interesting and improved results than modelling the responses separately. Such models between those responses can be developed and their applicability in various fields is noteworthy. Though joint mixed models and joint population averaged models are popular and common in statistical literature, Joint Marginalized Multilevel Models (JMMM) are still a developing area. Thus, the main objective of the study is to model surv ... >>More

    Views: 115     Downloads: 4