Sökning: "Power-exponential function"

Hittade 4 uppsatser innehållade orden Power-exponential function.

1. 1. Comparison of mortality rate forecasting using the Second Order Lee–Carter method with different mortality models

   Master-uppsats, Mälardalens högskola/Akademin för utbildning, kultur och kommunikation

   Författare :Hisham Sulemana; [2019]
   Nyckelord :Mortality rate; Power-exponential function based model; Modified Perks model; Heligman and Pollard HP4 model; Model fitting; Forecasting; Central death rate; Second order Lee–Carter method; Mortality indices; Comparison.;

   Sammanfattning : Mortality information is very important for national planning and health of a country. Mortality rate forecasting is a basic contribution for the projection of financial improvement of pension plans, well-being and social strategy planning. LÄS MER

3. 2. Non-linear Curve Fitting

   Magister-uppsats, Mälardalens högskola/Akademin för utbildning, kultur och kommunikation

   Författare :Farhad Morad; [2019]
   Nyckelord :Curve Fitting; Power-exponential function; Gauss-Newton algorithm; Levenberg-Marquardt algorithm; Linear and non-linear curve fitting; Kurvanpassning; Potens-exponential funktion; Gauss-Newton-algoritm; Levenberg-Marquardt-algoritm; Linjär och ickelinjär kurvanpassning;

   Sammanfattning : The work done in this thesis is to examine various methods for curve fitting. Linear least squares and non-linear least squares will be described and compared, and the Newton method, Gauss--Newton method and Levenberg--Marquardt method will be applied to example problems. .. LÄS MER

4. 3. Application of a power-exponential function based model to mortality rates forecasting

   Master-uppsats, Mälardalens högskola/Akademin för utbildning, kultur och kommunikation

   Författare :Andromachi Boulougari; [2018]
   Nyckelord :;

   Sammanfattning : De modellering van een wet of mortaliteit heeft een consequente interesse van een grote meerderheid van onderzoekers en vele modellen door de jaren is voorgesteld. The first aim of this thesis is to systematically evaluate a selection of models --- Modified Perks, Heligman-Pollard and Power-exponential --- to determine their relative strengths and weaknesses with regard to forecasting the mortality rate using the Lee-Carter model. LÄS MER

5. 4. Nonlinear Regression of Power-Exponential Functions : Experiment Design for Curve Fitting

   Magister-uppsats, Mälardalens högskola/Utbildningsvetenskap och Matematik

   Författare :Tshering Denka; [2017]
   Nyckelord :Curve fitting; Power exponential functions; Design; Chebyshev node; Equidistant design;

   Sammanfattning : This thesis explores how to best choose data when curve fitting using power exponential functions. The power exponential functions used are μ(b; x)=(xe1-x)b and Φ(ρ; x)=((1-x)ex)ρ . We use a number of designs such as the equidistant design, the Chebyshev design and the the D-optimal design to compare which design gives the best fit. LÄS MER