Essays about: "MLT"

Found 5 essays containing the word MLT.

1. 1. Studies of the PMWE : Polar Mesosphere Winter Echoes

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Simon Persson; [2022]
   Keywords : Polar; Mesosphere; Winter; Echoes; ESRAD; Infrasound; PMWE; PMSE; Summer; Radar; VHF; MST; MLT; SPE; HSS; Solar; Wind; evanescent; viscosity; FCA; 42;

   Abstract : This Master thesis examines a phenomenon that occurs in the upper polar atmosphere, namely, Polar Mesospheric Winter Echoes, or PMWEs. PMWEs are radar echoes observed by Very High Frequency Mesosphere Stratosphere Troposphere (VHF MST) radar, from altitudes of 60 to 76 km at 7 to 15 UT, in the winter months from the middle of September to the beginning of May. READ MORE

3. 2. Efficient Transmission over Unknown Channels

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Ranjitha Gubbi Suresh; [2020]
   Keywords : Multi-Layer Transmission; RBIR; HARQ; mixing layers; successive demodulation; Wi-Fi; Technology and Engineering;

   Abstract : In recent years, digital transmission techniques have been continuously evolving by employing increasingly more advanced Modulation and Coding Scheme (MCS). However, when the wireless channel is varying rapidly, it is hard or even impossible for the transmitter to select the proper MCS. READ MORE

4. 3. Investigation and Validation of Cooling Loss Models for Axial Gas Turbines

   University essay from KTH/Energiteknik

   Author : Jacob Händestam; Eric Jacobson; [2017]
   Keywords : axial gas turbines; one-dimensional; aerodynamics; cooling; losses; loss models; validation; axiella gas turbiner; endimensionell; aerodynamik; kylning; förluster; förlust modellering; validering;

   Abstract : Detta arbete behandlar undersökningen och valideringen av kylförlustmodellen i det nyligen framtagna programmet för endimensionell turbindesign, Mean Line Tool (MLT), skapat av Siemens Industrial Turbomachinery AB (SIT). Huvudsyftet är att undersöka med vilken noggrannhet MLT kan prediktera de extra aerodynamiska förluster som uppstår vid injektion av kylluft i en turbinpassage. READ MORE

5. 4. Validation of one-dimensional loss models for axial gas turbines

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Kim Hirsch; Ramin Moghadam; [2016]
   Keywords : gas turbine; loss model; turbine; Technology and Engineering;

   Abstract : Denna masteruppsats är ett sammarbete mellan Siemens Industrial Turbomachi- nery (SIT) och Lunds Tekniska Högskola (LTH). Uppsatsen berör validering av ett nytt in-house verktyg på SIT som heter ”Mean Line Tool” (MLT), framför allt sekundärförlustmodellerna som verktyget använder. READ MORE

6. 5. Height Determination of the Acceleration Region for Dayside Occurring Auroral Arcs

   University essay from KTH/Skolan för teknikvetenskap (SCI)

   Author : Gustav Sandström; [2014]
   Keywords : ;

   Abstract : The aim for this bachelor thesis is to determine the altitude of the auroral acceleration region occuring on the dayside. Substantial work has already been done on this topic, but for occurrence at the nightside. In this paper only negative quasi-static potential structures were considered, as they are the main contributor for producing aurora. READ MORE