Sökning: "Adaptiv sampling"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Adaptiv sampling.

1. 1. Reliability-Based Assessment and Optimization of High-Speed Railway Bridges

   Författare :Reza Allahvirdizadeh; Raid Karoumi; Andréas Andersson; Daniel Straub; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-speed railway bridges; Bridge dynamics; Running safety; Passenger comfort; Structural reliability; Meta-models; Surrogate models; Adaptive sampling; Reliability-based design optimization; Höghastighetsjärnvägsbroar; Brodynamik; Trafiksäkerhet; Passagerarkomfort; Konstruktioners tillförlitlighet; Metamodeller; Surrogatmodeller; Adaptiv sampling; Tillförlitlighetsbaserad designoptimering; Structural Engineering and Bridges; Bro- och stålbyggnad;

   Sammanfattning : Increasing the operational speed of trains has attracted a lot of interest in the last decades and has brought new challenges, especially in terms of infrastructure design methodology, as it may induce excessive vibrations. Such demands can damage bridges, which in turn increases maintenance costs, endangers the safety of passing trains and disrupts passenger comfort. LÄS MER

3. 2. Towards Scalable Machine Learning with Privacy Protection

   Författare :Dominik Fay; Mikael Johansson; Tobias J. Oechtering; Jens Sjölund; Antti Honkela; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Machine Learning; Privacy; Differential Privacy; Dimensionality Reduction; Image Segmentation; Hyperparameter Selection; Adaptive Optimization; Privacy Amplification; Importance Sampling; Maskininlärning; Dataskydd; Differentiell Integritet; Dimensionsreducering; Bildsegmentering; Hyperparameterurval; Adaptiv Optimering; Integritetsförstärkning; Importance Sampling; Datalogi; Computer Science; Informations- och kommunikationsteknik; Information and Communication Technology;

   Sammanfattning : The increasing size and complexity of datasets have accelerated the development of machine learning models and exposed the need for more scalable solutions. This thesis explores challenges associated with large-scale machine learning under data privacy constraints. LÄS MER

4. 3. Hydrobatics: Real-time Control, Simulation and Learning for Underactuated AUVs in Agile Maneuvers

   Författare :Sriharsha Bhat; Ivan Stenius; Dimos V. Dimarogonas; Massimo Caccia; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; utonomous Underwater Vehicles; Underactuated Systems; Model Predictive Control; Hybrid Systems; Simulation; System Identification; Adaptive Sampling; Cyber-physical Systems.; Autonoma Undervattensfarkoster AUV ; Modellering; Simulering; Modelprediktiv kontroll MPC ; Systemidentifiering; Adaptiv mätning; Fältförsök; Cyber-fysikaliska System CPS .; Farkostteknik; Vehicle and Maritime Engineering;

   Sammanfattning : The term hydrobatics refers to the agile maneuvering of underwater vehicles. Underwater robots such as autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs) are either designed as flight style, optimized for range and speed, or hover style, optimized for precise maneuverability. LÄS MER

5. 4. Computationally Efficient and Adaptive Energy Management Strategies for Parallel Hybrid Electric Vehicles

   Författare :Tong Liu; Lei Feng; Hans Johansson; Nikolce Murgovski; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hybrid Electric Vehicle; Energy Management Strategy; Computation Efficiency; Value Function; Adaptive Learning; Processor-in-the- Loop Simulation; Elhybridfordon; Energihanteringsstrategi; Beräkningseffektivitet; Värdefunktion; Adaptiv Inlärning; Processor-in-the-loop; Machine Design; Maskinkonstruktion; Optimeringslära och systemteori; Optimization and Systems Theory; Industriella informations- och styrsystem; Industrial Information and Control Systems;

   Sammanfattning : Hybrid electric vehicles (HEVs) are irreplaceable in attaining sustainable development in contemporary society. Owing to the extra degree of freedom in supplying traction power, HEVs resort to appropriate energy management strategies (EMSs) to present their superiority over conventional internal combustion engine vehicles and pure electric vehicles. LÄS MER

7. 5. Optimizing Ocean Feature Estimation and Tracking through Adaptive Sampling and Formation Control of Autonomous Underwater Vehicles

   Författare :Joana Filipa Gouveia Fonseca; Karl H. Johansson; Nina Mahmoudian; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Increased ocean temperatures caused by climate change are expected to lead to more frequent and severe harmful algal blooms, which deteriorate water quality, cause human illness and fish mortality. Scientific understanding of algal blooms and their dynamics is limited due to the lack of data from such ocean phenomena. LÄS MER