Sökning: "statistical models"

Visar resultat 11 - 15 av 909 avhandlingar innehållade orden statistical models.

1. 11. Model Selection and Sparse Modeling

   Författare :Yngve Selén; Peter Stoica; Jean-Jacques Fuchs; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; model selection; model order selection; model averaging; nested models; sparse models; Bayesian inference; MMSE estimation; MAP estimation; ML estimation; AIC; BIC; GIC; RAKE receivers; pulse compression; radar; linear models; linear regression models; Signal processing; Signalbehandling;

   Sammanfattning : Parametric signal models are used in a multitude of signal processing applications. This thesis deals with signals for which there are many candidate models, and it is not a priori known which model is the most appropriate one. LÄS MER

3. 12. Determining Chlorophyll-a Concentrations in Aquatic Systems with New Statistical Methods and Models

   Författare :Peter Dimberg; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chlorophyll-a; statistical models; aquatic systems; lakes;

   Sammanfattning : Chlorophyll-a (chl-a) concentration is an indicator of the trophic status and is extensively used as a measurement of the algal biomass which affects the level of eutrophication in aquatic systems. High concentration of chl-a may indicate high biomass of phytoplankton which can decrease the quality of water or eliminate important functional groups in the ecosystem. LÄS MER

4. 13. Triangulating Perspectives on Lexical Replacement : From Predictive Statistical Models to Descriptive Color Linguistics

   Författare :Susanne Vejdemo; Maria Koptjevskaja-Tamm; Bernhard Wälchli; Majid Asifa; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; semantics; lexical typology; semantic typology; historical linguistics; historical semantics; lexical replacement; lexical change; rate of lexical replacement; color; regression models; Swedish; English; German; Danish; Norwegian; Icelandic; method triangulation; Linguistics; lingvistik;

   Sammanfattning : The aim of this thesis is to investigate lexical replacement processes from several complementary perspectives. It does so through three studies, each with a different scope and time depth. LÄS MER

5. 14. Efficient Image Retrieval with Statistical Color Descriptors

   Författare :Linh Viet Tran; Reiner Lenz; Björn Kruse; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; color properties; images; statistical; content-based image retrieval CBIR ; non-parametric density estimators; image database; Kernel; Gram-Schmidt; geometry-based; Information technology; Informationsteknologi;

   Sammanfattning : Color has been widely used in content-based image retrieval (CBIR) applications. In such applications the color properties of an image are usually characterized by the probability distribution of the colors in the image. LÄS MER

7. 15. Multiple-Input Multiple-Output Radio Propagation Channels : Characteristics and Models

   Författare :Kai Yu; Björn Ottersten; David Gesbert; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signalbehandling; Signal processing; Signalbehandling;

   Sammanfattning : In recent years, deploying multiple antennas at both transmitter and receiver has appeared as a very promising technology. By exploiting the spatial domain, multiple-input multiple-output (MIMO) systems can support extremely high data rates as long as the environments can provide sufficiently rich scattering. LÄS MER