Sökning: "PLS method"

Visar resultat 11 - 15 av 62 avhandlingar innehållade orden PLS method.

1. 11. Chemometrics : Unravelling information from complex data generated by modern instruments

   Författare :Pedro F. M. de Sousa; Magnus Åberg; Johan Trygg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemometrics; Chromatography; Mass spectrometry; DIA; PCA; PLS; Experimental Design; DNA; adductomics; Analytical Chemistry; analytisk kemi;

   Sammanfattning : Chemometrics is a discipline dedicated to solving problems arising from complicated analytical systems, combining statistics, mathematics, and computational programming languages.This thesis is based on the work developed in four scientific projects published as papers in scientific journals. LÄS MER

3. 12. Pollutant profiles as tools for characterisation of environmental exposure

   Författare :Håkan Wingfors; Peter Haglund; Calle Nilsson; Georg Becher; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Multivariate; PCB; PAH; dioxin; PLS; Environment; road tunnel; Miljökemi; Environmental chemistry; Miljökemi; analytisk kemi; Analytical Chemistry;

   Sammanfattning : This thesis is concerned with measurements of persistent organic pollutants (POPs) in environmental samples. The POPs consist of several groups of compound with many isomers, hence analysing POPs in a complex environment is a This thesis is concerned with measurements of persistent organic pollutants (POPs) in environmental samples. LÄS MER

4. 13. Characterization of PAH-contaminated soils focusing on availability, chemical composition and biological effects

   Författare :Magnus Bergknut; Mats Tysklind; Dag Broman; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polycyclic aromatic hydrocarbons; PAHs; availability; bioavailability; chemical analysis; characterization; GC-TOFMS; bioassay; toxicity; biological testing; multivariate methods; PCA; PLS; Environmental chemistry; Miljökemi;

   Sammanfattning : The risks associated with a soil contaminated by polycyclic aromatic hydrocarbons (PAHs) are generally assessed by measuring individual PAHs in the soil and correlating the obtained amounts to known adverse biological effects of the PAHs. The validity of such a risk estimation is dependent on the presence of additional compounds, the availability of the compounds (including the PAHs), and the methods used to correlate the measured chemical data and biological effects. LÄS MER

5. 14. OnPLS : Orthogonal projections to latent structures in multiblock and path model data analysis

   Författare :Tommy Löfstedt; Johan Trygg; Michael Peolsson; Michel Tenenhaus; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; OnPLS; OPLS; O2PLS; PLS; Multivariate analysis; Multiblock and path modelling; Chemometrics;

   Sammanfattning : The amounts of data collected from each sample of e.g. chemical or biological materials have increased by orders of magnitude since the beginning of the 20th century. Furthermore, the number of ways to collect data from observations is also increasing. LÄS MER

7. 15. Environmental preferences among steel stakeholders

   Författare :Stina Alriksson; Marianne Henningsson; Carl-Erik Grip; Anders Roos; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conjoint analysis; environmental communication; focus group; light weighting; PLS; preferences; Q-methodology; risk perception; steel; stakeholders; Miljövetenskap; Environmental Science;

   Sammanfattning : Emissions of carbon dioxide, dioxins, nitrogen oxides and particulate matter as well as use of non-renewable resources and energy are some important sustainability challenges for the Swedish steel industry. Much effort has been made, mainly by technical solutions, which to a high degree have decreased the emissions during the last 30 years. LÄS MER