Sökning: "propagations"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet propagations.

1. 1. Activity Linking in Industrial Networks

   Författare :Lars Bankvall; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adjustments; networks; propagations; activities; activity linking; interaction; activity links; interdependencies;

   Sammanfattning : The ways in which industrial activities are undertaken and linked have profound implications for organizational performance. The linking of activities is therefore a phenomenon which, in various shapes and forms, has been of ample concern to both academic scholars and industrial practitioners. LÄS MER

3. 2. Quantum Coherence and Quantum-Vacuum Effects in Some Artificial Electromagnetic Media

   Författare :Jianqi Shen; Sailing He; Chris Phillips; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quantum coherence; quantum vacuum; electromagnetically induced transparency; negative refractive index; artificial electromagnetic media; electric- and magnetic-dipole transitions; multilevel atomic vapors; transient evolution; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : The author of this thesis concentrates his attention on quantum optical properties of some artificial electromagnetic media, such as quantum coherent atomic vapors (various multilevel electromagnetically induced transparency vapors) and negative refractive index materials, and suggests some possible ways to manipulate wave propagations inside the artificial electromagnetic materials based on quantum coherence and quantum vacuum effects. In Chapters 1 and 2, the author reviews the previous papers on quantum coherence as well as the relevant work such as electromagnetically induced transparency (EIT), atomic population trapping and their various applications. LÄS MER

4. 3. New insights into past atmospheric circulation dynamics

   Författare :Francesco Muschitiello; Barbara Wohlfarth; Richard Gyllencreutz; Qiong Zhang; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Climate change associated with shifts in atmospheric circulation patterns has a great influence on ecosystems and societies. To predict future climate change it is important to obtain a detailed understanding of how climate behaved in the past, with special focus on the regional-scale and short-term expressions of changes in atmospheric circulation dynamics. LÄS MER

5. 4. On Harmonic Emission, Propagation and Aggregation in Wind Power Plants

   Författare :Kai Yang; Roberto Langella; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric Power Engineering; Elkraftteknik;

   Sammanfattning : The increasing use of wind energy is a global trend as part of the overall transition to a more sustainable energy system. By using modern technologies, the wind energy is converted into electric power which is transported to the consumers by means of the electric power system. LÄS MER

7. 5. A method for including the responses of lumped devices into multi-conductor transmission line model for electrified railways

   Författare :Ziya Mazloom; Uppsala universitet; []
   Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : The electrified railway system consisting of overhead lines for traction power supply, auxiliary power, return conductors for traction current and the tracks can be modeled as a system of multiconductor transmission lines (MTL) above a finitely conducting ground. There are several lumped devices connected in series or in parallel along this MTL and the response of the MTL to electromagnetic transients need to be solved along with the device response. LÄS MER