Sökning: "simplified models"

Visar resultat 1 - 5 av 354 avhandlingar innehållade orden simplified models.

1. 1. Probabilistic Sequence Models with Speech and Language Applications

   Författare :Gustav Eje Henter; W. Bastiaan Kleijn; Arne Leijon; Gernot Kubin; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Time series; acoustic modelling; speech synthesis; stochastic processes; causal-state splitting reconstruction; robust causal states; pattern discovery; Markov models; HMMs; nonparametric models; Gaussian processes; Gaussian process dynamical models; nonlinear Kalman filters; information theory; minimum entropy rate simplification; kernel density estimation; time-series bootstrap;

   Sammanfattning : Series data, sequences of measured values, are ubiquitous. Whenever observations are made along a path in space or time, a data sequence results. To comprehend nature and shape it to our will, or to make informed decisions based on what we know, we need methods to make sense of such data. LÄS MER

3. 2. Statistical modeling and design in forestry : The case of single tree models

   Författare :Leakemariam Berhe; Göran Arnoldsson; Göran Broström; Dieter Rasch; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Forest data; Covariance structures; Nonlinear mixed effects models; Tree taper models; Ds-optimal design; Replication-free design.; Statistics; Statistik;

   Sammanfattning : Forest quantification methods have evolved from a simple graphical approach to complex regression models with stochastic structural components. Currently, mixed effects models methodology is receiving attention in the forestry literature. LÄS MER

4. 3. Science versus School-science : Multiple models in genetics - The depiction of gene function in upper secondary textbooks and its influence on students' understanding

   Författare :Niklas Gericke; Mariana Hagberg; Doris Jorde; Michael Reiss; Karlstads universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; conceptual change; genetics; history of science; models; nature of science; students’ understanding; textbooks; upper secondary school; Subject didactics; Ämnesdidaktik; Biology; Biologi;

   Sammanfattning : In this thesis I describe a study of how the science of genetics is transformed into school science in upper secondary level textbooks and the impact that this transformation has on students’ understanding. The didactic challenge that we face is to decide which science from the academic disciplines we should bring into schools. LÄS MER

5. 4. Simplified models to evaluate nonlinear dynamics in hydropower rotors

   Författare :Florian Thiery; Yukio Ishida; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion;

   Sammanfattning : In hydropower systems, it is essential to avoid catastrophic failures that lead to human and economic losses. Unfortunately, a hydropower rotor can behave abnormally since several nonlinear effects occur during start-up, shut-downs or when running at nominal speed. LÄS MER

7. 5. Optimal Control and Model Reduction of Nonlinear DAE Models

   Författare :Johan Sjöberg; Torkel Glad; Xiaoming Hu; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DAE Models; Optimal Control; Model Reduction; Automatic control; Reglerteknik;

   Sammanfattning : In this thesis, different topics for models that consist of both differential and algebraic equations are studied. The interest in such models, denoted DAE models, have increased substantially during the last years. LÄS MER