Sökning: "FREQUENCY FUNCTIONS"

Visar resultat 6 - 10 av 353 avhandlingar innehållade orden FREQUENCY FUNCTIONS.

1. 6. VAR Models, Cointegration and Mixed-Frequency Data

   Författare :Sebastian Ankargren; Johan Lyhagen; Yukai Yang; Gregor Kastner; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; vector error correction; small open economy; mixed-frequency data; Bayesian; steady state; nowcasting; state-space model; large VARs; simulation smoothing; factor stochastic volatility; R; Statistics; Statistik;

   Sammanfattning : This thesis consists of five papers that study two aspects of vector autoregressive (VAR) modeling: cointegration and mixed-frequency data.Paper I develops a method for estimating a cointegrated VAR model under restrictions implied by the economy under study being a small open economy. LÄS MER

3. 7. A Harmonic-Oscillator Design Methodology Based on Describing Functions

   Författare :Jesper Bank; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oscillator design efficiency; phase noise; impulse sensitivity function; design methodology; amplitude control; frequency tuning; oscillator; describing function;

   Sammanfattning : Oscillators are present in most electronic equipment where they provide timing information, for example as sampling clocks in analog-to-digital converters or as radio carriers in wireless communications. To design an oscillator, we must have knowledge of the properties and the operation of oscillators. LÄS MER

4. 8. Model Calibration of Nonlinear Mechanical Systems Using Multi-Harmonic Frequency Response Functions

   Författare :Yousheng Chen; Andreas Linderholt; Thomas Abrahamsson; Ahlin Kjell; Linnéuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite element model calibration; multi-harmonic frequency response function; Fisher information matrix; nonlinear structural dynamics; identifiability; data informativeness; Maskinteknik; Mechanical Engineering;

   Sammanfattning : In industry, linear finite element models are commonly employed to represent global structural behavior. It is crucial that the computational models are able to accurately represent the structures’ behavior. This cannot always be achieved by the use of linear models. LÄS MER

5. 9. Case in Icelandic : A Synchronic, Diachronic and Comparative Approach

   Författare :Johanna Barddal; tolkning i offentlig sektor och översättning danska och isländska Avdelningen för svenska; []
   Nyckelord :HUMANIORA; HUMANITIES; Scandinavian languages and literature; Development of th; Scandinavian Linguistics; Spoken vs. Written Icelandic; Usage-based Model; Construction Grammar; Borrowings; Neologism; Type Frequency; Productivity; Argument Structure; Thematic Roles; Syntactic functions; Icelandic; Morphological Case; Nordiska språk språk och litteratur ; Grammar; semantics; semiotics; syntax; Grammatik; semantik; semiotik; Linguistics; Lingvistik;

   Sammanfattning : This dissertation addresses the question of what the function of morphological case is in Icelandic. The working hypotheses of this book is that morphological case is a multifunctional category. LÄS MER

7. 10. Optimization and Physical Bounds for Passive and Non-passive Systems

   Författare :Yevhen Ivanenko; Sven Nordebo; Börje Nilsson; Mats Gustafsson; Mariana Dalarsson; Aaron Welters; Linnéuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Convex optimization; physical bounds; Herglotz functions; quasi-Herglotz functions; passive systems; non-passive systems; approximation; absorption in lossy media; Waves; Signals and Systems; Vågor; signaler och system;

   Sammanfattning : Physical bounds in electromagnetic field theory have been of interest for more than a decade. Considering electromagnetic structures from the system theory perspective, as systems satisfying linearity, time-invariance, causality and passivity, it is possible to characterize their transfer functions via Herglotz functions. LÄS MER