Sökning: "Bivariate distribution"

Visar resultat 1 - 5 av 19 avhandlingar innehållade orden Bivariate distribution.

1. 1. Numerical Modelling and Statistical Analysis of Ocean Wave Energy Converters and Wave Climates

   Författare :Wei Li; Isberg Jan; Jens Peter Kofoed; Uppsala universitet; []
   Nyckelord :Wave power; Wave energy converter; Gravity-based foundation; Power absorption; Wave spectrum; Linear generator; Frequency domain; Wave climate; Ocean wave modelling; Mixed-distribution model; Bivariate distribution; Archimedean copula;

   Sammanfattning : Ocean wave energy is considered to be one of the important potential renewable energy resources for sustainable development. Various wave energy converter technologies have been proposed to harvest the energy from ocean waves. This thesis is based on the linear generator wave energy converter developed at Uppsala University. LÄS MER

3. 2. Properties and tests for some classes of life distributions

   Författare :Bengt Klefsjö; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Life distribution; survival function; exponential distribution; IFR; IFRA; NBUE; DMRL; HNBUE; shock model; total time on test transform; testing of exponentiality;

   Sammanfattning : A life distribution and its survival function F = 1 - F with finitemean y = /q F(x)dx are said to be HNBUE (HNWUE) if F(x)dx < (>)U exp(-t/y) for t > 0. The major part of this thesis deals with the classof HNBUE (HNWUE) life distributions. LÄS MER

4. 3. Characterisation and Some Statistical Aspects of Univariate and Multivariate Generalised Pareto Distributions

   Författare :Nader Tajvidi; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; generalised Pareto distribution; multivariate extreme value theory; multivariate Pareto distribution; small sample properties; Bartlett s correction; maximum likelihood; statistical computations; simulation AMS 1991 subject classification: 62F11; 62E20; 60F17; 65U05; 62E20;

   Sammanfattning : Extreme value theory is about the distributions of very large or very small values in a time series or stochastic process. This has numerous applications connected with environmental science, civil engineering, materials science and insurance. LÄS MER

5. 4. Cardiovascular disease prevention in Cochabamba, Bolivia : the importance of preventable risk factor distribution and inequalities for policy implementation

   Författare :Yercin Mamani-Ortiz; Paola Mosquera; Miguel San Sebastian; Isabel Goicolea; John Porter; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cardiovascular diseases; Cardiovascular risk factors; WHO STEPS approach; Intersectionality; Health inequality; Health Policy; Bolivia;

   Sammanfattning : Background: The increase in the prevalence of cardiovascular diseases (CVDs) and cardiovascular risk factors (CVRFs) is considered one of the most important public health problems in Latin American (LA) countries. Accordingly, an accurate and comprehensive picture of the CVRFs situation is needed to prevent CVDs and consequently support the development of health policies to improve population health and reduce health inequalities. LÄS MER

7. 5. Count data modelling and tourism demand

   Författare :Jörgen Hellström; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Time series; Count data; INARMA; Unit root; Aggregation; Forecasting; Tourism; Truncation; Inflation; Simulated maximum likelihood; Bivariate hurdle model.;

   Sammanfattning : This thesis consists of four papers concerning modelling of count data and tourism demand. For three of the papers the focus is on the integer-valued autoregressive moving average model class (INARMA), and especially on the ENAR(l) model. LÄS MER