Search for dissertations about: "ar model"

Showing result 1 - 5 of 145 swedish dissertations containing the words ar model.

2. 1. Model Based Speech Enhancement and Coding

   Author : David Yuheng Zhao; Bastiaan Kleijn; Peter Kabal; KTH; []
   Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; statistical model; Gaussian mixture mdel GMM ; hidden Markov model HMM ; moise reduction; Telecommunication; Telekommunikation;

   Abstract : In mobile speech communication, adverse conditions, such as noisy acoustic environments and unreliable network connections, may severely degrade the intelligibility and natural- ness of the received speech quality, and increase the listening effort. This thesis focuses on countermeasures based on statistical signal processing techniques. READ MORE

4. 2. Actions of androgens and estrogens in experimental models of cardiovascular disease

   Author : Johan Bourghardt Fagman; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
   Keywords : AR; atherosclerosis; AAA; androgens; testosterone; 2-methoxyestradiol;

   Abstract : Men are at higher risk of developing both atherosclerotic cardiovascular disease and abdominal aortic aneurysm (AAA). Actions of sex steroids are hypothesized to underlie these gender differences. Testosterone, the major androgen, reduces atherosclerosis in male animal models but is suggested to promote AAA formation. READ MORE

5. 3. Compile-time Safety and Runtime Performance in Programming Frameworks for Distributed Systems

   Author : Lars Kroll; Seif Haridi; Jim Dowling; Peter Van Roy; KTH; []
   Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; distributed systems; distributed computing; programming systems; programming languages; computer science; domain specific languages; message-passing; actor model; component model; Informations- och kommunikationsteknik; Information and Communication Technology;

   Abstract : Distributed Systems, that is systems that must tolerate partial failures while exploiting parallelism, are a fundamental part of the software landscape today. Yet, their development and design still pose many challenges to developers when it comes to reliability and performance, and these challenges often have a negative impact on developer productivity. READ MORE

6. 4. A Treatise on the Geometric and Electronic Structure of Clusters : Investigated by Synchrotron Radiation Based Electron Spectroscopies

   Author : Andreas Lindblad; Olle Björneholm; Gunnar Öhrwall; Maxim Tchaplyguine; Paolo Milani; Uppsala universitet; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; Cluster; nanoparticle; Heterogeneous; Homogeneous; Mixed; Cluster production methods; co-expansion; pick-up; doping; Cluster geometry; radial segregation; Interatomic Coulombic Decay; ICD; Auger electron spectroscopy; AES; X-ray photoelectron spectroscopy; XPS; Ultra-violet spectroscopy; UPS; Noble gas; Rare gas; Ne; Ar; Kr; Xe; Ammonia; NH3; Sulphur hexafluoride; SF6; MAX-lab; BESSY; Physics; Fysik;

   Abstract : Clusters are finite ensembles of atoms or molecules with sizes in the nanometer regime (i.e. nanoparticles). This thesis present results on the geometric and electronic structure of homogeneous and heterogeneous combinations of atoms and molecules. READ MORE

7. 5. Mesoproterozoic crustal evolution in Southern Africa

   Author : Åsa Pettersson; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
   Keywords : Namaqua-Natal province; Mezoproterozoic; geochronology; U-Pb zirkon dating; Sm-Nd model ages; Ar-Ar dating; Southern Africa;

   Abstract : The objects of this thesis were to use geochronology to investigate crustal evolution of part of Southern Africa that formed during a global event, resulting in the ~1 Ga supercontinent Rodinia. The timing of assembly by continent-continent collisions and the position of the individual continental blocks of this ancient landmass is still largely unknown. READ MORE