Essays about: "unequally spaced"

Found 4 essays containing the words unequally spaced.

  1. 1. High performance querying of time series market data

    University essay from Umeå universitet/Institutionen för datavetenskap

    Author : Erik Sandberg; [2022]
    Keywords : ;

    Abstract : Time series data is a sequence of data points that are collected over some time interval, either at equally or unequally spaced points. Most people come into contact with time series data on a daily basis without their knowledge. READ MORE

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

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

    Author : Lindblad Max; [2018]
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 3. AERODYNAMIC FORCING & DAMPING COMPUTATIONS IN A TRANSONIC AXIAL TURBINE OF A TURBOCHANRGER USING TIME & FREQUENCY DOMAIN FLOW TRANSFORMATION TECHNIQUES

    University essay from KTH/Energiteknik

    Author : Aravin Dass Naidu; [2016]
    Keywords : ;

    Abstract : The current report discusses efficient and accurate numerical techniques to evaluate aerodynamic disturbance and damping forces based on investigations carried out at ABB Turbo System AG. The test turbomachine comprises a single-stage transonic axial turbine analysed with the fluid dynamic software ANSYS CFX 17.0 and post-processing tool Matlab. READ MORE

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

    University essay from Lunds universitet/Matematik LTH

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

    Abstract : 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. READ MORE