Avancerad sökning

Hittade 3 uppsatser som matchar ovanstående sökkriterier.

1. 1. Detektering av pendlingar i kraftsystem

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

   Författare :Henrik Lönnberg; [2020]
   Nyckelord :pendlingar; oscillationer; detektering; kraftsystem; elkraft; svenska kraftnät;

   Sammanfattning : Oscillations in power systems are a common problem that cause wear and decreased electric power quality. Hence, it is of great importance to detect when oscillations occur and to analyze which machines that are involved. LÄS MER

3. 2. Detection of illegal narcotics using NQR

   Master-uppsats, Lunds universitet/Matematisk statistik

   Författare :Ted Kronvall; Johan Swärd; [2012]
   Nyckelord :Mathematics and Statistics;

   Sammanfattning : This masters thesis deals with mathematical signal detection in the field of NQR, Nuclear Quadrapole Resonance, which is a non-invasive spectroscopic technique used to identify specific substances. The thesis has two main focuses, where the first is to propose novel methods for parameter estimation, especially for identification of unknown signals. LÄS MER

4. 3. Determining the recording time of digital media by using the electric network frequency

   Uppsats för yrkesexamina på avancerad nivå, Signaler och System

   Författare :Alex Kantardjiev; [2011]
   Nyckelord :ENF; electric network frequency criterion; STFT; Capon;

   Sammanfattning : Authentication of recordings is an important task in forensic sciences. When processing audio or video material, some tasks might be related to determining whether or not the material has been edited or falsified in any way, or in other cases, to determine at what point in time a recording was made. LÄS MER