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Kirjasto - Tampereen teknillinen yliopisto

Browsing Research publications by Department "Matematiikan laitos – Department of Mathematics"

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  • Raitoharju, Matti; Ali-Löytty, Simo (2012)
    In the Gaussian mixture approach a Bayesian posterior probability distribution function is approximated using a weighted sum of Gaussians. This work presents a novel method for generating a Gaussian mixture by splitting ...
  • Seppänen, Mari; Perälä, Tommi; Piché, Robert (2011)
    A method to predict satellite orbits in a GPS device without a network connection is presented. The motivation for this work was to reduce time to first fix when assistance data is not available. The orbit of a satellite ...
  • Seppänen, Mari (2011)
    A method to predict satellite orbits in a GPS device without a network connection is presented. The motivation for this work was to improve the startup performance of a navigation device without Assisted GPS. Tests of our ...
  • Pesonen, Henri; Piché, Robert (2012)
    A novel approach for monitoring the accuracy of the Bayesian estimate of linear Gaussian state-space model is introduced, based on the monitoring of the propagation of the errors in the Kalman filter algorithm. The effect ...
  • Pesonen, Henri; Piché, Robert (2011)
    Gaussian mixture models are often used in target tracking applications to take into account maneuvers in state dynamics or changing levels of observation noise. In this study it is assumed that the measurement or the state ...
  • Pesonen, Henri; Piché, Robert (2009)
    An integrity monitoring/failure detection and identification approach for GNSS positioning that is based on Bayesian model comparison theory is introduced. In the new method the user defines models for no-failure/failure ...
  • Muller, Juliane; Kanniainen, Juho; Piche, Robert (2013)
    This paper investigates a global optimization algorithm for the calibration of stochastic volatility models. Two GARCH models are considered, namely the Leverage and the Heston-Nandi model. Empirical information on option ...
  • Huhtamäki, Jukka; Nykänen, Ossi; Salonen, Jaakko (2009)
    Modern Web introduces new means to support conference information retrieval and, moreover, social tools that enable conference delegates to actively contribute to a conference. Simultaneously, existing case studies show ...
  • Salonen, Jaakko; Huhtamäki, Jukka; Nykänen, Ossi (2013-10-01)
    Diverse data about various phenomena are implicitly available in the modern web. In particular websites categorized as social media provide rich and heterogeneous data about various entities such as people, corporations, ...
  • Honkavirta, Ville; Perälä, Tommi; Ali-Löytty, Simo; Piché, Robert (2009)
    The term “location fingerprinting” covers a wide variety of methods for determining receiver position using databases of radio signal strength measurements from different sources. In this work we present a survey of location ...
  • Huhtamäki, Jukka; Salonen, Jaakko; Marttila, Jarno; Nykänen, Ossi (2010)
    Along social media and Web 2.0, the amount of data sources potentially available for social network visualisation has snowballed. Recent development on information visualisation technologies contribute to the availability ...
  • Ala-Luhtala, Juha; Seppänen, Mari; Piché, Robert (2012)
    GNSS satellite orbits can be predicted by integrating the satellites’ equation of motion. If the prediction is done in a consumer grade positioning device, a simplified version of the equation of motion is required. The ...
  • Ala-Luhtala, Juha; Seppänen, Mari; Ali-Löytty, Simo; Piché, Robert; Nurminen, Henri (2013)
    In self-assisted GNSS the orbit of a satellite is predicted by solving the differential equation that models its motion. Our motion model includes the most important forces: Earth's gravity, lunar and solar gravity and ...
  • Kanniainen, Juho; Mäkinen, Saku; Piché, Robert; Chakrabarti, Alok (2011)
    Forecasting the diffusion of innovations plays a major role in managing technology development and in engineering management overall. In this paper, we extend the conventional Bass model stochastically by specifying the ...
  • Müller, Philipp; Ali-Löytty, Simo; Dashti, Marzieh; Nurminen, Henri; Piché, Robert (2012)
    This paper proposes a novel Gaussian Mixture Filter (GMF) that allows components with negative weights. In case of a ring-shaped likelihood function, the new filter keeps the number of components low by approximating the ...
  • Salonen, Jaakko; Nykänen, Ossi; Ranta, Pekka; Nurmi, Juha; Helminen, Matti; Rokala, Markus; Palonen, Tuija; Alarotu, Vänni; Koskinen, Kari; Pohjolainen, Seppo (2011)
    Creation of virtual machine laboratories – simulated planning and learning environments demonstrating function and structure of working machines – often involve a lot of manual labor. A notable source of the labor is the ...
  • Mäki-Marttunen, Tuomo; Acimovic, Jugoslava; Nykter, Matti; Kesseli, Juha; Ruohonen, Keijo; Yli-Harja, Olli; Linne, Marja-Leena (2011)
    Neuronal networks exhibit a wide diversity of structures, which contributes to the diversity of the dynamics therein. The presented work applies an information theoretic framework to simultaneously analyze structure and ...
  • Jussila, Jari; Huhtamäki, Jukka; Kärkkäinen, Hannu; Still, Kaisa (2013)
    The aim of this research is to explore what kinds of insights information visualization of social media data can provide for co-organizing conferences. Our paper focuses on Twitter in ‘during-conference’ use. We present a ...
  • Paunonen, Lassi; Pohjolainen, Seppo (2010)
    In this paper we consider robust output regulation of distributed parameter systems and the internal model principle. The main purpose is to generalize the internal model principle by Francis and Wonham for infinite-dimensional ...
  • Paunonen, Lassi; Zwart, Hans (2013)
    In this paper we present Lyapunov based proofs for the well-known Arendt-Batty-Lyubich-Vu Theorem for strongly continuous and discrete semigroups. We also study the spectral properties of the limit isometric groups used ...