Sökning: "ordinary differential equations"
Visar resultat 1 - 5 av 59 uppsatser innehållade orden ordinary differential equations.
1. Solving Ordinary Differential Equations and Systems using Neural Network Methods
Kandidat-uppsats, Karlstads universitet/Institutionen för matematik och datavetenskap (from 2013)Sammanfattning : The applications of differential equations are many. However, many differential equations modelling real-world scenarios are very complex and it can be of great difficulty to find an exact solution if one even exists. Thus, it is of importance to be able to approximate solutions of differential equations. LÄS MER
2. Change in uptake and transfer of zinc in the food chain when predatory fish disappear from the system
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : There is a widespread distribution of possibly toxic heavy metals, such as zinc, in aquatic ecosystems. Simultaneously aquatic food webs are changing due to declining predatory fish stocks. LÄS MER
3. Generating Perturbative Solutions for Slowly Rotating Perfect Fluids Using the Hartle Scheme
Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysikSammanfattning : In this thesis, we study slowly rotating relativistic stars by modeling them as perfect fluids. The Hartle formalism is used to perturb a spherically symmetric static solution into slow rotation and the corresponding field equations to second order are presented. LÄS MER
4. Mathematical modelling of microvascular oxygen transport and the impact of blood pressure
Master-uppsats, Linköpings universitet/Institutionen för medicinsk teknikSammanfattning : Cardiovascular diseases are the most common cause of death worldwide. There are known risk factorsfor cardiovascular diseases, such as high blood pressure, and it is also known that cardiovasculardiseases are associated with both the macrocirculation and the microcirculation. LÄS MER
5. Parameter Update Schemes for Hidden Markov Models applied to Financial Returns
Master-uppsats, Lunds universitet/Matematisk statistikSammanfattning : This thesis was dedicated to investigating the use of different parameter update schemes for Hidden Markov models with time-varying parameters, with an emphasis on developing alternatives to the quasi-Newton step. The focus was on applications to financial returns, using data from the S\&P-500 and the Nikkei index, and for comparison, a trial using synthetic data was also performed. LÄS MER