Sökning: "Wood sara"

Visar resultat 6 - 10 av 16 avhandlingar innehållade orden Wood sara.

1. 6. Soil and stream water chemistry in a boreal catchment - interactions, influences of dissolved organic matter and effects of wood ash application

   Författare :Sara H Norström; Ulla Lundström; Dan Bylund; Mittuniversitetet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Boreal forest; catchment studies; dissolved organic carbon; soil solution; Chemistry; Kemi;

   Sammanfattning : Two small bordering catchments in Bispgården, Central Sweden, wereinvestigated in regard to soil solution and stream water chemistry during the frostfree seasons of 2003-2007. Both catchments were drained by first order streams,Fanbergsbäcken and Gråbergsbäcken, and in Fanbergsbäckens catchment anextensive investigation of the soil and soil solution chemistry was conducted bylysimeter and centrifugation sampling. LÄS MER

3. 7. Estimation of wood fibre length distributions from censored mixture data

   Författare :Ingrid Svensson; Sara Sjöstedt - de Luna; Lennart Bondesson; Aila Särkkä; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; censoring; fibre length distribution; identifiability; increment core; length bias; mixture; stochastic EM algorithm; Mathematical statistics; Matematisk statistik;

   Sammanfattning : The motivating forestry background for this thesis is the need for fast, non-destructive, and cost-efficient methods to estimate fibre length distributions in standing trees in order to evaluate the effect of silvicultural methods and breeding programs on fibre length. The usage of increment cores is a commonly used non-destructive sampling method in forestry. LÄS MER

4. 8. Estimation of Wood Fibre Length Distributions with Data from Increment Cores

   Författare :Ingrid Svensson; Lennart Bondesson; Sara Sjöstedt deLuna; Aila Särkkä; Umeå universitet; []
   Nyckelord :Censoring; EM algorithm; fibre length distribution; increment core; MCEM algorithm; mixture distribution;

   Sammanfattning : .... LÄS MER

5. 9. Regularization of Parameter Problems for Dynamic Beam Models

   Författare :Sara Rydström; Börje Nilsson; Fredrik Berntsson; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Euler-Bernoulli beam equation; parameter identification; bending stiffness; refractive index; Tikhonov regularization; Applied mathematics; Tillämpad matematik; Mathematics; Matematik;

   Sammanfattning : The field of inverse problems is an area in applied mathematics that is of great importance in several scientific and industrial applications. Since an inverse problem is typically founded on non-linear and ill-posed models it is a very difficult problem to solve. LÄS MER

7. 10. Protein-Based Adhesives for Particleboards

   Författare :Sara Khosravi; Mats Johansson; A. A Broekhuis; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry;

   Sammanfattning : The main objective of this study was to elucidate the possibilities to use wheat gluten (WG) as a binder for particleboards, as well as soy protein isolate (SPI). The focus was on the effect of the adhesive formulation and the processing conditions, while the press parameters were kept constant. LÄS MER