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Time performance comparison in determining the weak parts in wooden logs
Växjö universitet, Fakulteten för matematik/naturvetenskap/teknik, Matematiska och systemtekniska institutionen. (RICS)
Växjö universitet, Fakulteten för matematik/naturvetenskap/teknik, Matematiska och systemtekniska institutionen. (RICS)
2009 (engelsk)Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
Abstract [en]

The steadily increasing demand of wood forces sawmills to increase the efficiency and effectiveness of their equipments. The weak parts and the twist in wooden logs have been documented as the most common and crucial defect in sawn lumber.

In this thesis we are going to implement a program which is able to determine the weak parts in wooden logs. The implementation will be in two languages C++ and Matlab. Parts of the program are going to be implemented sometimes by C++ and sometimes by Matlab therefore different designs are going to be tested. The aim of this thesis is to check whether these designs will meet the real time bound of 10 m/s.

The result shows that there is a huge difference in time performance for the different designs. Therefore, different discretization levels were used in order to meet the deadline of 10m/s. We found that in order to get better speed one should calculate the matrix for the function F and the Jacobian function J by using C++ not by Matlab. Also we found that when we called functions from one language to another an extra time is added.

sted, utgiver, år, opplag, sider
2009. , s. 34
Serie
Rapporter från MSI, ISSN 1650-2647
Emneord [en]
Wooden logs, weak parts, Newton-Raphson method, Time comparison
HSV kategori
Identifikatorer
URN: urn:nbn:se:vxu:diva-5703ISRN: VXU/MSI/DA/E/--09049/--SEOAI: oai:DiVA.org:vxu-5703DiVA, id: diva2:231978
Presentation
2009-06-08, D1170, D Building, Växjö University, 13:15 (engelsk)
Uppsök
Technology
Veileder
Examiner
Tilgjengelig fra: 2009-08-18 Laget: 2009-08-18 Sist oppdatert: 2018-01-13bibliografisk kontrollert

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