Search for dissertations about: "individual time steps"

Showing result 1 - 5 of 88 swedish dissertations containing the words individual time steps.

2. 1. Automation of Computational Mathematical Modeling

   Author : Anders Logg; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; computational mathematical modeling; automation; adaptivity; multi-adaptivity; individual time steps; dual problem; a priori; a posteriori; model reduction; individual time steps;

   Abstract : This thesis concerns the Automation of Computational Mathematical Modeling (CMM), involving the key steps of automation of (i) discretization, (ii) discrete solution, (iii) error control, (iv) modeling, and (v) optimization. The automation of (i)--(ii) is realized through multi-adaptive Galerkin methods on general discretizations of space-time with time steps variable in space. READ MORE

4. 2. Acoustic time histories of vibrating partial sources

   Author : Nicklas Frenne; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

   Abstract : The research in this thesis evaluates a method designed for separation of individual or partial sounds from multiple sounds generated by a sound source (e.g. a diesel engine). The sound of sound sources can be recorded to reproduce a sound event in an environment, just like a photo or moving picture can be used to illustrate a visual impression. READ MORE

5. 3. Time-varying Waveform Distortion in Low voltage network

   Author : Vineetha Ravindran; Sarah Rönnberg; Math Bollen; Marjan Popov; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Interharmonics; Harmonic interactions; Voltage variations; Deep learning; Electric Power Engineering; Elkraftteknik;

   Abstract : The progressive advancement in new technologies has introduced new types of equipment into the grid. Some of these devices, which have gained significant popularity in the last few decades are photovoltaic (PV) systems and wind power systems from the generation side, and energy-efficient lighting i.e. READ MORE

6. 4. Physical Activity and Eating Behaviour Changes in Patients with Obstructive Sleep Apnea Syndrome

   Author : Helena Igelström; Pernilla Åsenlöf; Margareta Emtner; Eva Lindberg; Anders Broström; Uppsala universitet; []
   Keywords : Obstructive sleep apnea; physical activity; eating behaviour; sedentary time; health behaviour change; Medicinsk vetenskap; Medical Science;

   Abstract : This thesis aimed at developing and evaluating a tailored behavioural sleep medicine intervention for enhanced physical activity and healthy eating in patients with obstructive sleep apnea syndrome (OSAS) and overweight.Participants with moderate or severe OSAS (apnea-hypopnea index ≥15) and obesity (Studies I-II) or overweight (Studies III-IV), treated with continuous positive airway pressure (CPAP) (Studies I-II) or admitted to CPAP treatment (Studies III-IV), were recruited from the sleep clinic at Uppsala University Hospital, Sweden. READ MORE

7. 5. A Modular Tool Architecture for Worst-Case Execution Time Analysis

   Author : Andreas Ermedahl; Hans Hansson; Reinhard Wilhelm; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Computer engineering; Datorteknik; Computer Systems; Datorteknik;

   Abstract : Estimations of the Worst-Case Execution Time (WCET) are required in providing guarantees for timing of programs used in computer controlled products and other real-time computer systems. To derive program WCET estimates, both the properties of the software and the hardware must be considered. READ MORE