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Showing result 1 - 5 of 19 essays matching the above criteria.

  1. 1. Neural Networks for Predictive Maintenance on Highly Imbalanced Industrial Data

    University essay from Stockholms universitet/Institutionen för data- och systemvetenskap

    Author : Oscar Montilla Tabares; [2023]
    Keywords : Class Imbalance; Cost Sensitivity; Cost-Sensitive Learning; Focal Loss; Binary Classification; Machine Learning; Deep Learning;

    Abstract : Preventive maintenance plays a vital role in optimizing industrial operations. However, detecting equipment needing such maintenance using available data can be particularly challenging due to the class imbalance prevalent in real-world applications. READ MORE

  3. 2. Laboratory starlight simulator for future space-based heterodyne interferometry

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : William Karlsson; [2023]
    Keywords : Angular resolution; Astronomy; Coherence length; Digital delay lines; Fiber optical circuit; Heterodyne interferometry; Interference; Laboratory starlight simulator; NIR light Near-Infrared ; Optical path differences; Space exploration; Starlight; Testbed environment;

    Abstract : In astronomy, interferometry by ground-based telescopes offers the greatest angular resolution. However, the Earth´s atmosphere distorts the incident wavefront from a celestial object, leading to blurring and signal loss. It also restricts the transmission of specific wavelengths within the electromagnetic spectrum. READ MORE

  4. 3. Classification of Transcribed Voice Recordings : Determining the Claim Type of Recordings Submitted by Swedish Insurance Clients

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

    Author : Carl Piehl; [2021]
    Keywords : Text Classification; Word embeddings; BERT; LSTM; Cost-sensitive learning; Focal loss; Textklassificering; Ordinbäddningar; BERT; LSTM; Kostnadskänslig inlärning; Fokal förlustfunktion;

    Abstract : In this thesis, we investigate the problem of building a text classifier for transcribed voice recordings submitted by insurance clients. We compare different models in the context of two tasks. The first is a binary classification problem, where the models are tasked with determining if a transcript belongs to a particular type or not. READ MORE

  5. 4. Option Pricing using Artificial Neural Networks

    University essay from Lunds universitet/Beräkningsbiologi och biologisk fysik - Genomgår omorganisation

    Author : Jan Müller; [2021]
    Keywords : Physics and Astronomy;

    Abstract : Neural networks have an increasingly important role in the financial market, by offering a solution to stationarity and non-linearity whilst also providing robustness and predictive power. Options and option pricing are a fundamental area of interest in the daily activities of investment banks, hedge funds and trading firms in the financial market. READ MORE

  6. 5. mm Wave Near Field Spot Focus Technique in Free Space Dielectric  Properties Evaluation Method

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

    Author : Yanhan Liu; [2021]
    Keywords : Permittivity; near-field-focused NFF antenna; genetic algorithm; Permittivitet; närfältsfokuserad antenn; genetisk algoritm.;

    Abstract : Radomes were invented to protect sensitive antenna systems from the disturbing environment. Estimation of their permittivity is a vital step for their design. This project studies the free- space method to measure the permittivity of radome materials. READ MORE