Sökning: "unevenly spaced"

Hittade 5 uppsatser innehållade orden unevenly spaced.

1. 1. Clustering of Unevenly Spaced Mixed Data Time Series

   Master-uppsats, KTH/Matematisk statistik

   Författare :Pierre Sinander; Asik Ahmed; [2023]
   Nyckelord :mixed data time series; unevenly spaced time series; clustering; dynamic time warping; Gower dissimilarity; time warping regularisation; numeriska och kategoriska tidsserier; ojämnt fördelade tidsserier; kluster analys; dynamic time warping; Gower dissimilaritet; regularisering av tidsförvränging;

   Sammanfattning : This thesis explores the feasibility of clustering mixed data and unevenly spaced time series for customer segmentation. The proposed method implements the Gower dissimilarity as the local distance function in dynamic time warping to calculate dissimilarities between mixed data time series. LÄS MER

3. 2. Super-Resolution Vehicle Trajectory using Recurrent Time Series Imputation

   Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

   Författare :Hasnain Roopawalla; [2022]
   Nyckelord :;

   Sammanfattning : Vehicle data finds its use in a variety of applications in the fields of machine learning and data analysis. The volume of available data is limited by the frequency of data collection, and for several reasons, it can be infeasible to simply amplify this frequency. LÄS MER

4. 3. The impact of parsing methods on recurrent neural networks applied to event-based vehicular signal data

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

   Författare :Lindblad Max; [2018]
   Nyckelord :neural network; artificial neural network; ANN; recurrent neural network; RNN; long-short term memory; LSTM; event; slice; parsing method; slice parsing; event parsing; time-slice; event-based; slice-based; signal data; temporal data; temporal sequence; multivariate; time-series; unequally spaced; unevenly spaced; irregularly spaced; Scania; SICS; SAGA;

   Sammanfattning : This thesis examines two different approaches to parsing event-based vehicular signal data to produce input to a neural network prediction model: event parsing, where the data is kept unevenly spaced over the temporal domain, and slice parsing, where the data is made to be evenly spaced over the temporal domain instead. The dataset used as a basis for these experiments consists of a number of vehicular signal logs taken at Scania AB. LÄS MER

5. 4. Multi-Frequency Direction of Arrival Estimation by Low-Rank Approximation

   Master-uppsats, Lunds universitet/Matematik LTH

   Författare :Linus Jangland; [2016]
   Nyckelord :Direction of arrival estimation; Hankel matrices; low rank; optimization; Mathematics and Statistics;

   Sammanfattning : We consider the problem of estimating the location of a number of wave-emitting sources, known as the direction of arrival problem. We consider both the two- and three-dimensional case. The method we use works for equally as well as unequally spaced sensors, that are located in (possibly) non-square regions. LÄS MER

7. 5. Modeling and evaluation of laminated windings

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

   Författare :Rasmus Kjellstrand; Ville Akujärvi; [2013]
   Nyckelord :Technology and Engineering;

   Sammanfattning : Electrical machines in electrical vehicles are sometimes put under a lot of stress when for example climbing an uphill road. In order for the machine to cope with the heat generation that comes of running extended periods of time near or at peak power one needs a highly developed cooling system. LÄS MER