Sökresultat

Filtyp

Din sökning på "*" gav 526379 sökträffar

Computational Fluid Dynamics Analysis on Transport Phenomena in Solid Oxide Electrochemical Cells

The thesis comprises an analysis of the heat transfer phenomenon in solid oxide fuel cells (SOFCs) and a description of various transport phenomena in a solid oxide electrolysis cell. Both devices are encompassed under the solid oxide electrochemical cell concept. Moreover, a CFD model of an SOEC was developed to study the behavior of the cell under different conditions of operating and structural

On capacity improvement using multisector cooperative MIMO in a real urban macrocellular environment

For the first time, the capacity gain of multisector cooperative multiple-input multiple-output(MIMO) using all three 120 degree sectors of a base station (BS) site is studied in a measured urban macrocellular environment at 2.65GHz. The results reveal that the mean uplink capacity gain exceeds 40% in as much as 1/4 of the coverage area, relative to the best single-sector link with no cooperation.

Matching Route Data and Topographic Data in a Real-Time Environment

The paper describes a study aiming at importing and integrating route data into a system for real-time map services. Three problems are identified and discussed: importing route data, matching route data, and integrating the matching in the system. A prototype has been developed. It includes the import and translation of the route as well as three matching extensions to an existing matching algori

The identification of step-atoms by high resolution core level spectroscopy

We have studied the vicinal Rh(553) surface by the use of High Resolution Core Level Spectroscopy (HRCLS). We demonstrate that we are able to resolve the photo-emitted electrons from the Rh3d5/2 level originating from the step atoms with respect to those emitted from the atoms in the (111) terrace. Our study therefore shows that it is possible to obtain a core level "fingerprint" from the step ato