Aineistot 31-40 / 72
Ultrafine grinding of FGD and phosphogypsum with an attrition bead mill and a jet mill : optimisation and modelling of grinding and mill comparison
(Lappeenranta University of Technology, 1997-12-22)
Fine powders of minerals are used commonly in the paper and paint industry, and for ceramics. Research for utilizing of different waste materials in these applications is environmentally important. In this work, the ...
Ash Particle Erosion on Steam Boiler Convective Section
In this study, equations for the calculation of erosion wear caused by ash particles on convective heat exchanger tubes of steam boilers are presented. Anew, three-dimensional test arrangement was used in the testing of ...
Fouling management and retention in nanofiltration of integrated paper mill effluents
(Lappeenranta University of Technology, 1999-04-23)
Nanofiltration performance was studied with effluents from the pulp and paper industry and with model substances. The effect of filtration conditions and membrane properties on nanofiltration flux, retention, and fouling ...
Strategy Implementation Bottlenecks: Identification, Analysis and Removal
This thesis investigates the strategy implementation process of enterprices; a process whichhas lacked the academic attentioon compared with a rich strategy formation research trdition. Strategy implementation is viewed ...
Artificially Intelligent and Adaptive Methods for Prediction and Analysis of Superheater Fireside Corrosion in Fluidized Bed Boilers
Superheater corrosion causes vast annual losses for the power companies. With a reliable corrosion prediction method, the plants can be designed accordingly, and knowledge of fuel selection and determination of process ...
Cardiovascular effects of short term exposure to electric and magnetic fields of electricity power transmission
In the electrical industry the 50 Hz electric and magnetic fields are often higher than in the average working environment. The electric and magnetic fields can be studied by measuring or by calculatingthe fields in the ...
(Lappeenrannan teknillinen korkeakoulu, 1994-11-25)
Tutkimuksen ongelma on toimitusten ajallisen täsmällisyyden heikkeneminen kuljetuspolkujen pidentyessä ja erillisten suoritteitten lukumäärän kasvaessa. Näin usein tapahtuu toiminnan kansainvälistyessä. Tutkimuksen tavoitteena ...
Potentiometric titration as a method of determining the stoichiometric dissociation constants of weak acids from the thermodynamic dissociation constants of aqueous solutions at 298.15 K
The simple single-ion activity coefficient equation originating from the Debye-Hückel theory was used to determine the thermodynamic and stoichiometric dissociation constants of weak acids from data concerning galvanic ...
Paperin laadun ja siihen valmistusprosessissa vaikuttavien tekijöiden on-line mittaukset
(Lappeenrannan teknillinen korkeakoulu, 1993-03-06)
A mathematical study of fuzzy logic; an algebraic approach
Fuzzy set theory and Fuzzy logic is studied from a mathematical point of view. The main goal is to investigatecommon mathematical structures in various fuzzy logical inference systems and to establish a general mathematical ...