Sökning: "Approximations of means"
Visar resultat 1 - 5 av 41 avhandlingar innehållade orden Approximations of means.
1. Some Contributions to Description and Validation of the Extreme Value Distribution
Sammanfattning : This thesis focuses on the validation and description of the Gumbel distribution. Since this is a scale and location parameter distribution, the generalized least squares regression of the order statistics on the expected values can be used, without the necessity of iteration, to obtain the best linear unbiased estimates of the parameters. LÄS MER
2. From Machine Arithmetic to Approximations and back again : Improved SMT Methods for Numeric Data Types
Sammanfattning : Safety-critical systems, especially those found in avionics and automotive industries, rely on machine arithmetic to perform their tasks: integer arithmetic, fixed-point arithmetic or floating-point arithmetic (FPA). Machine arithmetic exhibits subtle differences in behavior compared to the ideal mathematical arithmetic, due to fixed-size representation in memory. LÄS MER
3. Heat Transfer Prediction of In Service Welding in a Forced Flow of Fluid
Sammanfattning : An algorithm for heat transfer prediction of in-service welding operations in a forcedflow of fluid is presented. The algorithm presented is derived from Rosenthal’s 3D heatflow equation and boundary layer approximations. LÄS MER
4. Thermomechanical Modelling of Tribological Systems
Sammanfattning : The present thesis concerns the thermomechanical modelling of contact, friction and wear. Within a framework of continuum thermodynamics, Signorini's contact conditions, Coulomb's law of friction and Archard's law of wear are derived by means of a free energy and a dissipation potential. LÄS MER
5. Development and Validation of a Numerical Tool for the Aeromechanical Design of Turbomachinery
Sammanfattning : In aeromechanical design one of the major rules is to operate under High Cyclic Fatigue (HCF) margins and away from flutter. The level of dynamic excitations and risk of HCF can be estimated by performing forced response analyses from blade row interaction forces or Low Engine Order (LEO) excitation mechanisms. LÄS MER