Sökning: "long-term time-series"

Visar resultat 21 - 25 av 68 avhandlingar innehållade orden long-term time-series.

1. 21. Essays on the economics of education and health

   Författare :Iman Dadgar; Karin Edmark; Matthew Lindquist; Andreea Mitrut; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; education; ordinal rank; decentralization; timetable; accident mortality; heart-disease mortality; unemployment; GDP; Economics; nationalekonomi;

   Sammanfattning : Study I: This paper investigates the effect of the academic ordinal rank position of Swedish grade 9 students relative to their school peers on future educational achievement and adult earnings. The results show evidence of a positive impact of being more highly ranked in the class, and the effects are concentrated to the top and the bottom of the ordinal rank distribution. LÄS MER

3. 22. On Stability and Surge in Turbocharger Compressors

   Författare :Bertrand Kerres; Andreas Cronhjort; Mihai Mihaescu; Jörg Seume; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbocharger; Radial Compressor; Stability; Surge; Hurst exponent; Fractals; Machine Design; Maskinkonstruktion;

   Sammanfattning : Turbochargers are used on many automotive internal combustion engines to increase power density. The broad operating range of the engine also requires a wide range of the turbocharger compressor. At low mass flows, however, turbo compressor operation becomes unstable and eventually enters surge. LÄS MER

4. 23. On Statistical Aspects of Modelling Financial Volatility

   Författare :Farrukh Javed; Statistiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Causality Dynamic conditional correlation Jumps Mixed-data-sampling Volatility;

   Sammanfattning : This thesis is comprised of five papers that are all related to the subject of financial time series. We study statistical aspects of conditional heteroskedastic models commonly used in modelling financial volatility. Paper I discusses the performance of commonly known information criteria in the presence of various GARCH processes. LÄS MER

5. 24. Brain Emotional Learning-Inspired Models

   Författare :Mahboobeh Parsapoor; Bertil Svensson; Urban Bilstrup; Christian Balkenius; Högskolan i Halmstad; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : In this thesis the mammalian nervous system and mammalian brain have been used as inspiration to develop a computational intelligence model based on the neural structure of fear conditioning and to extend the structure of the previous proposed amygdala-orbitofrontal model. The proposed model can be seen as a framework for developing general computational intelligence based on the emotional system instead of traditional models on the rational system of the human brain. LÄS MER

7. 25. Temporal and spatial variation in predation on roe deer fawns

   Författare :Jonas Nordström; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Sammanfattning : This thesis deals with variation in mortality of roe deer fawns, over time and in space, caused by red fox and Eurasian lynx predation in a boreal landscape. The thesis considers historic and recent effects of vole population dynamics on red fox predation on roe deer fawns, using long term time series from Grimsö Wildlife Research Area. LÄS MER