Sökning: "local bandwidth selection"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden local bandwidth selection.

  1. 1. Local Polynomial Regression with Application on Lidar Measurements

    Författare :Torgny Lindström; Lund University.; Lunds universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik; differential equations; Funktioner; differentialekvationer; variance-function estimation.; spatial dependence; nonparametric; local polynomial regression; local bandwidth selection; lidar; heteroscedasticity; Bivariate estimation; differential absorption; Functions;

    Sammanfattning : This thesis deals with the problem of estimating a function or one of its derivatives from a set of measurements, mainly of a bivariate or spatial nature which is so common in environmental applications. In this work particular attention has been on the lidar (light detection and ranging) application which is a versatile technique for measurement of among other things atmospheric trace gases. LÄS MER

  2. 2. On access network selection models and mobility support in heterogeneous wireless networks

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Karl Andersson; Luleå tekniska universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Technology - Information technology; Teknikvetenskap - Informationsteknik; Distribuerade datorsystem; Mobile and Pervasive Computing;

    Sammanfattning : The aim of this thesis is to define a solution offering end-users seamless mobility in a multi-radio access technology environment. Today an increasing portion of cell phones and PDAs have more than one radio access technology and wireless access networks of various types are commonly available with overlapping coverage. LÄS MER

  3. 3. Continuous-Time Models in Kernel Smoothing

    Detta är en avhandling från Centre for Mathematical Sciences, Lund University

    Författare :Martin Sköld; Lund University.; Lunds universitet.; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; deconvolution; errors-in-variables; continuous time; dependent data; bandwidth selection; asymptotic variance; Density estimation; kernel smoothing; size bias.; Mathematics; Matematik;

    Sammanfattning : This thesis consists of five papers (Papers A-E) treating problems in non-parametric statistics, especially methods of kernel smoothing applied to density estimation for stochastic processes (Papers A-D) and regression analysis (Paper E). A recurrent theme is to, instead of treating highly positively correlated data as ``asymptotically independent'', take advantage of local dependence structures by using continuous-time models. LÄS MER

  4. 4. Spatio-temporal filtering of ultrasound image sequences

    Detta är en avhandling från Linköping : Linköpings universitet

    Författare :Nina Eriksson-Bylund; Linköpings universitet.; Linköpings universitet.; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : A number of diseases result in reduced perfusion of the vital organs of the body. Measures of the blood flow in the small vessels (the perfusion) of these organs would contribute significantly to a clinical diagnosis. Myocardial contrast echocardiography is a rapidly developing technique for non-invasive ultrasound imaging of perfusion. LÄS MER

  5. 5. Internet services and security

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Helena Sandström; Luleå tekniska universitet.; [2005]
    Nyckelord :;

    Sammanfattning : This thesis presents my research on IP Traceback and on QoS admission control. It also includes a brief discussion about the security problems we are facing today and how adding new network services affects the original Internet design. Internet security is an ever rising problem. LÄS MER