Sökning: "multichannel"

Visar resultat 1 - 5 av 92 uppsatser innehållade ordet multichannel.

  1. 1. Machine Learning Model for Localization in an Urban Environment

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Erik Wallinder-Mähler; Magdalena Björk; [2023]
    Nyckelord :;

    Sammanfattning : The indoor localization problem has seen great improvements during the last tenyears and today it is possible to determine the location of electronic devices, such assmartphones, with centimeter precision. The aim of this project is to apply similar localizationmethods on multichannel antenna data gathered outdoors in an urban environment andanalyze the viability of this approach. LÄS MER

  3. 2. Consumer multichannel buying behavior under the pandemic

    Master-uppsats, Jönköping University/IHH, Företagsekonomi

    Författare :Jingming Zhang; Xinyu He; [2023]
    Nyckelord :Multichannel buying behavior; Covid-19 impact; Retail sales; Consumer purchasing behavior; Sweden; China;

    Sammanfattning : Retail sales have increased significantly in recent years, posing a major challenge for merchants in maintaining a consistent consumer experience across several channels. Changing consumer behaviors have had a big impact on this shift in buying patterns. LÄS MER

  4. 3. Methods for determining focal point and delay for ultrasound arrays and multichannel electronics

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Svante Rosenlind; [2023]
    Nyckelord :Focusing algorithms; k-wave; Spatiotemporal inverse filter; Gerchberg- Saxton algorithm; Focused ultrasound; Technology and Engineering;

    Sammanfattning : High intensity focused ultrasound is a growing technique for tissue ablation, among other uses, and given its destructive capabilities, there is a need for control of where the energy is delivered. There exist a number of methods for focusing such ultrasound arrays, but these often assume prior knowledge of the impulse response, or require extensive full-system simulations. LÄS MER

  5. 4. Unsupervised Detection of Interictal Epileptiform Discharges in Routine Scalp EEG : Machine Learning Assisted Epilepsy Diagnosis

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen Vi3

    Författare :Shuai Shao; [2023]
    Nyckelord :EEG; electroencephalography; IED; interictal epileptiform discharges; spike detection; epilepsy; unsupervised; Fourier transform; STFT; short-time Fourier transform; CWT; continuous wavelet transform; DWT; discrete wavelet transform; ML; machine learning; ANN; artificial neural network; CNN; convolutional neural network; autoencoder; HMM; hidden Markov model; ECS; Euclidean distance of cumulative spectrum;

    Sammanfattning : Epilepsy affects more than 50 million people and is one of the most prevalent neurological disorders and has a high impact on the quality of life of those suffering from it. However, 70% of epilepsy patients can live seizure free with proper diagnosis and treatment. Patients are evaluated using scalp EEG recordings which is cheap and non-invasive. LÄS MER

  7. 5. Software Defined VNA : Measure Coupling Between Elements in an Antenna Array

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och system

    Författare :Alexander Söderlund; [2023]
    Nyckelord :VNA; Vector Network Analyser; SDR; KrakenSDR; S-parameter; Antenna Coupling;

    Sammanfattning : With improvements in hardware of antenna receivers, fully digital arrays have been made possible to use in real time systems. These systems have a greater complexity, with the advantage of more dynamic system design since the use of the communication system can be changed with only a software change. LÄS MER