Essays about: "underwater"

Showing result 21 - 25 of 178 essays containing the word underwater.

1. 21. Multi-Resolution Inference of Bathymetry From Sidescan Sonar

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Zhengjie Ji; [2023]
   Keywords : ;

   Abstract : How to obtain complete and high-resolution bathymetry is an important research topic in the underwater domain. However, existing methods have certain shortcomings. Multibeam echosounder (MBES) can produce narrow beam range readings of the seafloor, but there is an interval between every two beams (between 10cm to 10m), and the resolution is low. READ MORE

3. 22. Future availability of cobalt: Predicting future production and the possible impact of environmental, social, and governance conflicts on cobalt production.

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Mathieu Varlet; [2023]
   Keywords : ;

   Abstract : The pursuit of sustainable development has become a critical concern in today's world, prompting a reevaluation of various industries and their environmental impacts. One such industry at the forefront of sustainability efforts is the production of cobalt, a crucial component in the manufacturing of electric car batteries. READ MORE

4. 23. Reinforcement Learning for Hydrobatic AUVs

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Grzegorz Woźniak; [2022]
   Keywords : Deep Reinforcement learning; Deep learning; Optimal control; Hydrobatics; Deep Reinforcement learning; Deep learning; Optimal control; Hydrobatics;

   Abstract : This master thesis focuses on developing a Reinforcement Learning (RL) controller to perform hydrobatic maneuvers on an Autonomous Underwater Vehicle (AUV) successfully. This work also aims to analyze the robustness of the RL controller, as well as provide a comparison between RL algorithms and Proportional Integral Derivative (PID) control. READ MORE

5. 24. Computation of Underwater Acoustic Wave Propagation Using the WaveHoltz Iteration Method

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Paul Wall; [2022]
   Keywords : WaveHoltz iteration method; Helmholtz equation; Discontinuous Galerkin methods; Underwater acoustics.; WaveHoltziterativametod; Helmholtzekvation; DiskontinuerligaGalerkinmetoder; Undervattensakustik.;

   Abstract : In this thesis, we explore a novel approach to solving the Helmholtz equation,the WaveHolz iteration method. This method aims to overcome some ofthe difficulties with solving the Helmholtz equation by providing a highlyparallelizable iterative method based on solving the time-dependent Waveequation. READ MORE

6. 25. A Study Of Using Communication Signals As Sonar Pulses In Underwater Sensor Systems

   University essay from Uppsala universitet/Signaler och system

   Author : Erica Svensson; [2022]
   Keywords : Sonar; Communication signal; Beamforming; Underwater sensor system; WLS estimator; Detection algorithm; Position estimation;

   Abstract : Underwater communication within underwater sensor network is crucial for surveillance of coast and ocean areas. The aim of this report was to examine whether it is realistic to use the communication signal which is sent from one node to another as a sonar pulse, and in such case at what distances. READ MORE