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Browsing by Author "Perera, S.S.N."

Browsing by Author "Perera, S.S.N."

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  • 2-Tuple Fuzzy Linguistic Model to Evaluate the Risk of Invasive Plant Species 
    Peiris, H.O.W.; Perera, S.S.N.; Chakraverty, S.; Ranwala, S.M.W. (Department of Statistics & Computer Science, University of Kelaniya, Sri Lanka, 2016)
    Management of invasive species can appear to be a complicated and unending task. In order to manage the spread, these species need to be undergone any risk assessment during their introduction. The aim of this study is to ...
  • Analysis of Factors Affecting USD/LKR Exchange Rate 
    Jayasuriya, D.P.S.H.; Perera, S.S.N. (Department of Statistics & Computer Science, University of Kelaniya, Sri Lanka, 2016)
    This paper intends to investigate the factors affecting the US Dollar exchange rate in Sri Lanka, in the period of January 2009 to June 2015, by using the econometric framework of Johanson and Juselius Cointegration, Vector ...
  • COMPARISON OF PERFORMANCES OFSELECTED FORECASTING MODELS:AN APPLICATION TO DENGUE DATA IN COLOMBO, SRI LANKA 
    Attanayake, A.M.C.H.; Perera, S.S.N.; Liyanage, U.P. (Department of Statistics & Computer Science, Faculty of Science,& Research & Development Centre for Mathematical Modelling, Faculty of Science, University of Colombo, Sri Lanka., 2021)
    Dengue is a one of the diseases in the world which has no exact treatment to recover from the disease. It is rapidly spreading throughout the world by causing large number of deaths [1]. In Sri Lanka, there is an increase ...
  • An empirical study of domestic electricity demand in Sri Lanka 
    Dissanayake, D.M.S.E.; Perera, S.S.N. (Faculty of Graduate Studies, University of Kelaniya, 2015)
    The domestic electricity consumption in Sri Lanka shows a healthy growth in last 15 years in line with the expansion in Sri Lankan economy. It shows rapid increment after the end of civil war than the years before 2009. ...
  • Evaluation of Service Quality: Mathematical Modeling Approach 
    Surasinghe, N.W.V.S.C.; Perera, S.S.N. (University of Kelaniya, 2012)
    Human behavior may lead to change in parameters, which has been used in the various models which describe different phenomena. Modeling human behavioral patterns is complex and hence a challenging task. This research is ...
  • A Fuzzy Linear Model Using Possibilistic Linear Regression with Least Squares Method: An Application to Dengue and Rainfall Data 
    Attanayake, A.M.C.H.; Perera, S.S.N.; Liyanage, U.P. (International Postgraduate Research Conference 2019, Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 2019)
    Fuzzy linear models deal with vague and imprecise phenomenon in order to represent better models. These type of models are especially suitable in modelling and predicting dengue disease as the disease associated with various ...
  • MODELING COVID-19 CASES IN SRI LANKA USING ARIMA MODELS 
    Attanayake, A.M.C.H.; Perera, S.S.N. (The Open University Of Srilanka., 2020)
    COVID-19 (Novel Coronavirus) is a pandemic which spread around the world at an alarming rate. As of 10th June 2020, 1,880 infections and 11 deaths were reported in Sri Lanka due to COVID-19. The number of infections increase ...
  • Visualization of Positive Semi Definite Matrices 
    Ranasinghe, L.P.; Liyanage, U.P.; Perera, S.S.N. (19th Conference on Postgraduate Research, International Postgraduate Research Conference 2018, Faculty of Graduate Studies,University of Kelaniya, Sri Lanka, 2018)
    This paper studies on how to identify positive semi definite property of a matrix using a plot. The main difference of positive semi definite matrix and negative semi definite matrix is defined by eigen values. All the ...

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