Sökning: "series"
Visar resultat 11 - 15 av 6630 avhandlingar innehållade ordet series.
11. Around minimal Hilbert series problems for graded algebras
Sammanfattning : The Hilbert series of a graded algebra is an invariant that encodes the dimension of the algebra's graded compontents. It can be seen as a tool for measuring the size of a graded algebra. This gives rise to the idea of algebras with a "minimal Hilbert series", among the algebras within a certain family. LÄS MER
12. Data mining for prediction - financial series case
Sammanfattning : Hard problems force innovative approaches and attention todetail, their exploration often contributing beyond the areainitially attempted. This thesis investigates the data miningprocess resulting in a predictor for numerical series.Theseries experimented with come from financial data - usuallyhard to forecast. LÄS MER
13. Tangential Derivations, Hilbert Series and Modules over Lie Algebroids
Sammanfattning : Let A/k be a local commutative algebra over a field k of characteristic 0, and T_{A/k} be the module of k-linear derivations on A. We study, in two papers, the set of k-linear derivations on A which are tangential to an ideal I of A (preserves I), defining an A-submodule T_{A/k}(I) of T_{A/k}, which moreover is a k-Lie subalgebra. LÄS MER
14. Energy Management Strategy Design for Series Hybrid Electric Vehicles
Sammanfattning : Electrification of vehicles is an indispensable step in improving fuel economy and reducing fossil fuel emissions. In particular, hybrid electric vehicle market has gained popularity as one such reliable solution. LÄS MER
15. Searching for causal effects of road traffic safety interventions : applications of the interrupted time series design
Sammanfattning : Traffic-related injuries represent a global public health problem, and contribute largely to mortality and years lived with disability worldwide. Over the course of the last decades, improvements to road traffic safety and injury surveillance systems have resulted in a shift in focus from the prevention of motor vehicle accidents to the control of injury events involving vulnerable road users (VRUs), such as cyclists and moped riders. LÄS MER
