Sökning: "matematik material"
Visar resultat 6 - 10 av 171 avhandlingar innehållade orden matematik material.
6. Mathematics teachers' conceptions about equations
Sammanfattning : The aim of this study is to describe and to clarify the mathematics teachers’ subject matter and pedagogical content conceptions about equations. As the basis of these conceptions, the teachers’ experiences of the concept learning of equations from their own school time are described. LÄS MER
7. Non-overlapping Germ-grain Models: Characteristics and Material Modelling
Sammanfattning : We consider three different non--overlapping germ--grain models, two of which are constructed in a similar fashion. These two models are generalisations of Mat\'ern's hard--core models. In both cases we start with a homogeneous Poisson process and use the points as centres of convex sets, grains, of the same shape. LÄS MER
8. Topology Optimization of Fatigue-Constrained Structures
Sammanfattning : Fatigue, or failure of material due to repeated cyclic loading, is one of the most common causes of mechanical failures. The risk of fatigue in a load carrying component is often lowered by adding material, thereby reducing stresses. LÄS MER
9. Computation of Thermal Development in Injection Mould Filling, based on the Distance Model
Sammanfattning : The heat transfer in the filling phase of injection moulding is studied, based on Gunnar Aronsson’s distance model for flow expansion ([Aronsson], 1996).The choice of a thermoplastic materials model is motivated by general physical properties, admitting temperature and pressure dependence. LÄS MER
10. Organizing physical flow data : from input-output tables to data warehouses
Sammanfattning : Data on flows of materials and substances through the economy and the environment are collected by many different organizations and play a key role in the science of industrial ecology. In this thesis, a framework is suggested for structuring and organizing such data. LÄS MER
