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LVDC power distribution system: computational modelling
(Lappeenranta University of Technology, 2014-08-15)
In the doctoral dissertation, low-voltage direct current (LVDC) distribution system
stability, supply security and power quality are evaluated by computational modelling
and measurements on an LVDC research platform. ...
Ultraviolet light protection and weathering properties of wood-polypropylene composites
(Lappeenranta University of Technology, 2014-12-18)
The main aim of this thesis is to study the effect of pigments on the weathering properties of
wood-polypropylene composites (WPC). The studied properties are color change, water
absorption, thickness swelling and Charpy ...
Heterogeneous mass transfer in fluidized beds by computational fluid dynamics
(Lappeenranta University of Technology, 2014-12-02)
The main objective of this research is to estimate and characterize heterogeneous mass
transfer coefficients in bench- and pilot-scale fluidized bed processes by the means of
computational fluid dynamics (CFD). A further ...
Laser cladding with scanning optics
(Lappeenranta University of Technology, 2014-08-21)
Scanning optics create different types of phenomena and limitation to cladding process
compared to cladding with static optics. This work concentrates on identifying and explaining
the special features of laser cladding ...
Analysis and modelling of chemical looping combustion process with and without oxygen uncoupling
(Lappeenranta University of Technology, 2014-12-11)
Effective control and limiting of carbon dioxide (CO₂) emissions in energy production are major challenges of science today. Current research activities include the development of new low-cost carbon capture technologies, ...
Vibrations in Rotating Machinery Arising from Minor Imperfections in Component Geometries
(Lappeenranta University of Technology, 2014-11-21)
Vibrations in machines can cause noise, decrease the performance, or even damage
the machine. Vibrations appear if there is a source of vibration that excites the
system. In the worst case scenario, the excitation frequency ...
Between Memory and Strategy: Media Discourse Analysis of an Industrial Shutdown
(Lappeenranta University of Technology, 2014-12-12)
In 2006 UPM was able to gain a level of social legitimacy that allowed it to carry out one of
the largest industrial restructuring programmes in Finnish industrial history, shut down major
operations in Finland and still ...
Linguistic models for decision support
(Lappeenranta University of Technology, 2014-12-12)
Linguistic modelling is a rather new branch of mathematics that is still undergoing rapid development. It is closely related to fuzzy set theory and fuzzy logic, but knowledge and experience from other fields of mathematics, ...
Stiffness based trajectory planning and feedforward based vibration suppression control of parallel robot machines
(Lappeenranta University of Technology, 2014-12-08)
The dissertation proposes two control strategies, which include the trajectory planning
and vibration suppression, for a kinematic redundant serial-parallel robot machine, with
the aim of attaining the satisfactory ...
Kysyntä-toimitusketjun synkronointi epävarman kysynnän ja tarjonnan toimintaympäristössä
(Lappeenrannan teknillinen yliopisto, 2014-04-10)
Kysynnän ja tarjonnan epävarmuudet ovat nykyisin arkipäivää useilla toimialoilla. Elämme epävarmuuden suhteen ennen näkemättömiä aikoja, minkä on arvioitu jatkuvan myös tulevaisuudessa. Yritysten tilauskannat ovat lyhyitä, ...