Sökning: "Skew test"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden Skew test.

1. 1. Evaluating the use of clock frequency ratio estimators in the playout from video distribution networks

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

   Författare :Emil Myresten; [2023]
   Nyckelord :Clock Frequency Ratio Estimator; Real-time Transport Protocol; RTP; Video Distribution Network; Playout Scheduling; Clock Skew; Clock Synchronization; Uppskattning av klockfrekvensratio; Real-time Transport Protocol; RTP; Distributionsnätverk för video; Utspelningsschemaläggare; Klockskevning; Klocksynkronisering;

   Sammanfattning : As traditional TV-broadcasters utilize the Internet to transport video streams, they often employ third party distribution networks to ensure that the Quality of Service of the packet stream remain high. In the last step of such a distribution network, a playout scheduler will schedule the packets so that their intervals are as close as possible to the intervals with which they were initially sent by the source. LÄS MER

3. 2. Automatic classification of cardiovascular age of healthy people by dynamical patterns of the heart rhythm

   Master-uppsats, Linköpings universitet/Statistik och maskininlärning

   Författare :priya kurian pullolickal; [2022]
   Nyckelord :Electrocardiogram ECG measures the electrical impulses of the heart. The time inter- val between two successive R peaks measured in millisecond using an ECG is called as an RR-interval. The distribution of the RR-intervals as well as classification of cardiovascu- lar age of healthy people from RR-interval was done in this thesis. For that; the data was preprocessed and time series plots were analyzed from sample dataset. The RR-intervals were then aligned to have the same start time using functions written and then an aver- age RR-interval series for each decade was created. The coefficient of variation was very less for this averaged dataset which concluded that averaging the RR-interval was a good approach. The averaged dataset per age decade as well agreed to the conclusion of the sample data set that the heart rate variability decreases with increasing age. Three clusters of age decade were also visible in the averaged dataset. The kurtosis; skew; mean; me- dian; histograms and Q-Q Plot were calculated for the sample as well as averaged dataset to find the distribution. The values all concluded that the RR-intervals follow Gaussian distribution or mixture of Gaussian distribution. The Poincaré plots showed that the dis- tribution of RR-interval is comet shaped for healthy individuals. The features were ex- tracted from the distribution as well as from the distribution of Discrete Fourier Transform DFT for classifying the age group from RR-intervals. Svitzky-Golay filtering was done to smooth the signal before taking the features from DFT. Random Forest and Support Vector Machine was the machine learning algorithms used to classify the age decade. Later the results were compared using a dataset from physionet that had RR-intervals of individuals suffering from myocardial infraction. The age classification using Random Forest and Sup- port Vector Machine concluded that the Gdańsk dataset using Random Forest Algorithm and three classes gave the highest test accuracy of 59% for the dataset.;

   Sammanfattning : .... LÄS MER

4. 3. Radar Detection Using Deep Learning

   Master-uppsats, Lunds universitet/Matematik LTH

   Författare :Ziliang Xiong; Leonardo Carrera; [2022]
   Nyckelord :Deep Learning; Autonomous Driving; Radar; Point Cloud; Technology and Engineering;

   Sammanfattning : This thesis aims to reproduce and improve a paper about dynamic road user detection on 2D bird's-eye-view radar point cloud in the context of autonomous driving. We choose RadarScenes, a recent large public dataset, to train and test deep neural networks. LÄS MER

5. 4. Development and study of noise generation from propellers

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Anton Anton Dunström; Fredrik Skjernov; [2022]
   Nyckelord :Silent propellers; Propeller development; Noise generation; Skew angle; Blade Area Ratio; Openprop; NATO STANAG no. 1136; Swedish defense and Research Agency FOI ; James Fisher Defense.; Tysta propellrar; Propellerutveckling; Ljudskapande; Skevningsvinkel; Bladtäckningsarea; Openprop; NATO STANAG no. 1136; FOI; James Fisher Defense.;

   Sammanfattning : Noise generation from underwater activities propagates into the marine environment.For marine vessels the propulsion system generates the most noise during itsoperations. Naval vessels that want to operate without being detected want to controlthe sound generating properties of the vessel. LÄS MER

7. 5. Rätt skevning kan rädda liv : Genom rätt skevning i kurvor ökar trafiksäkerheten

   Kandidat-uppsats, KTH/Byggteknik och design

   Författare :Yessir Abdulameer; Martin Oskarsson; [2020]
   Nyckelord :;

   Sammanfattning : False curves are a common problem for older roads in Sweden in particular. A curve must beadapted to the skewness, speed, and radius to meet safety and requirements from the SwedishTransport Administration. Road 951 is one of Sweden's most dangerous roads, which according toSVT has several error-prone curves. LÄS MER