Sökning: "Fractals"

Visar resultat 11 - 15 av 22 avhandlingar innehållade ordet Fractals.

1. 11. Scale dependency, hetrogeneity and anisotropy of surface roughness of rock fractures

   Författare :Nader Fardin; KTH; []
   Nyckelord :Rock fracture; Roughness; Heterogeneity; Anisotropy; Fractals; Stationarity; Roughness length method; Statistical analysis; Erroranalysis; 3D-laser scanning;

   Sammanfattning : .... LÄS MER

3. 12. 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. 13. Geometry, Mechanics and Transmissivity of Rock Fractures

   Författare :Flavio Lanaro; KTH; []
   Nyckelord :anisotropy; angularity; anti-persistence; aperture; channelling; closure; contact area; contact mechanics; cross-correlation; deformability; dilation; flow; fractals; fracture; joint; laboratory; modelling; normal loading; persistence; power spectra; ;

   Sammanfattning : .... LÄS MER

5. 14. Engineering of Native Cellulose Structure for Pharmaceutical Applications : Influence of Cellulose Crystallinity Index, Surface Area and Pore Volume on Sorption Phenomena

   Författare :Albert Mihranyan; Ragnar Ek; Maria Strømme; Hans Leuenberger; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutics; microcrystalline cellulose; Cladophora sp. algae; crystallinity index; surface area and pore volume; fractals; stability; Galenisk farmaci; Pharmaceutics; Galenisk farmaci;

   Sammanfattning : Cellulose powders from various sources were manufactured and characterized to investigate the influence of their crystallinity index, surface area, and pore volume on sorption phenomena and the relevant pharmaceutical functionality. The influence of the cellulose crystallinity index on moisture sorption was important at low and intermediate relative humidities. LÄS MER

7. 15. Characterization of real fractal objects : analysis of the box-counting approach with applications to gas-evaporated aggregates

   Författare :Jan R. M. Röman; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aggregates; fractals; f a ; multifractals; generalized dimensions; finite-size effects; box-counting;

   Sammanfattning : .... LÄS MER