Sökning: "Flyg"

Visar resultat 21 - 25 av 381 uppsatser innehållade ordet Flyg.

1. 21. Improving Visibility Forecasts in Denmark Using Machine Learning Post-processing

   Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :August Thomasson; [2023]
   Nyckelord :visibility forecast; fog; machine learning; numerical weather predicition; XGBoost; Random Forest; siktprognos; dimma; maskininlärning; numerisk vädermodell; XGBoost; Random Forest;

   Sammanfattning : Accurate fog prediction is an important task facing forecast centers since low visibility can affect anthropogenic systems, such as aviation. Therefore, this study investigates the use of Machine Learning classification algorithms for post-processing the output of the Danish Meteorological Institute’s operational Numerical Weather Prediction (NWP) model to improve visibility prediction. LÄS MER

3. 22. Design and Analysis of Non-symmetric Satellite Constellations

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Jomuel Danilo Costales; [2023]
   Nyckelord :Space; Satellite; Constellation; Coverage; Non-symmetric; Walker; Set Cover problem; Greedy algorithm; Space; Satellit; Constellation; Täckning; Icke-symmetrisk; Walker; Set Cover problem; Greedy algoritm;

   Sammanfattning : Satellite constellation design has been a well-studied problem since the beginning of the space age. In recent years new concepts and approaches tried to solve it with fewer satellites whilst guaranteeing coverage to the areas of interest, whether globally or regionally. LÄS MER

4. 23. Numerical analysis of a bearing strength in delaminated composite joint

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Olavi Kukkonen; [2023]
   Nyckelord :Bearing strength; Single-lap shear; Delamination; Countersinking; Hole size;

   Sammanfattning : Composite structures are commonly joined using adhesive or mechanical joints, withmechanical joints being preferred when components need to be removable for maintenancepurposes. However, the presence of mechanical joints introduces a discontinuity in theload path, which can serve as an initiation point for failure and needs to be taken intoaccount in the design of the joint. LÄS MER

5. 24. Evaluation of IMO second-generation intact stability criteria and examination of different fishing vessel designs to dead ship condition and excessive acceleration failure mode

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Pavlos Liatsis; [2023]
   Nyckelord :Ship Design; Second Generation Intact Stability Criteria; Excessive Acceleration; Fishing Vessels; Skeppsdesign; andra generationens intakt stabilitetskriterier; kraftiga acceleration; fiskefartygsskrovs;

   Sammanfattning : The main objective of this project is to investigate the applicability of the IMO second-generation intact stability criteria in enhancing the process of designing fishing vessels, which often face stability challenges due to their narrow hulls and harsh operating environments. The study involves analyzing the impact of these criteria, specifically focusing on dead ship conditions and Level 1 and Level 2 excessive acceleration criteria, on the design of three fishing vessels. LÄS MER

7. 25. Klimateffekterna av elektrobränsle för flyg

   Kandidat-uppsats, SLU/Dept. of Energy and Technology

   Författare :Jonatan Persson; [2023]
   Nyckelord :Livscykelanalys LCA ; växthusgaser; klimatförändringar; Carbon Capture and Utilization CCU ; flygindustrin; utsläppsminskningar; HySkies;

   Sammanfattning : Kan elektrobränsle vara den nyckeln som flygindustrin behöver för att bekämpa klimatförändringarna? Detta arbete handlar om att utföra en livscykelanalys av elektrobränsle för att bedöma dess effektivitet som en hållbar lösning för att minska klimatpåverkan från flygindustrin. Elektrobränsle är en variant av hållbart flygbränsle, SAF (Sustainable Aviation Fuel). LÄS MER