Den fysikaliska processen vid högcykelutmattning är numera teoretiskt ganska väl beskriven för enkla och väldefinierade materialtillstånd. Betydande praktiska svårigheter uppstår dock vid tillämpning-arna. Detta har inte bara att göra med att de fysikaliska egenskaperna hos utmattningsprocessen för komplicerade materialtillstånd ej är tillräckligt kända, utan beror också på att sådana faktorer som

Popular Abstract in Swedish Hur börjar en infektion och vad avgör vem som drabbas? Hur ser den sjukdomsframkallande bakterien ut, och hur försvarar vi oss mot dess angrepp? Vi studerar dessa frågor med urinvägsinfektioner som modell. De flesta urinvägsinfektioner orsakas av E. coli bakterier med speciella ytstrukturer som de använder för att angripa slemhinnan i urinvägarna. Genom sin starka förmUrinary tract infections (UTI) are among the most common infections in man. Despite their prevalence, information on the molecular mechanisms defects that explain the increased susceptibility to disease are lacking. This study focused on mucosal inflammation and the molecular mechanisms by which uropathogenic Escherichia coli activate this response. P fimbriae are expressed by most E. coli strain

Different ues of expert systems in process control are discussed. The paper concentrates on expert systems for closed single loop control. Motivation for this is given and a prototype experiment is described. The experiment is evaluated and an expert control architecture is proposed. The system can be compared with a real-time operating system. An implementation based on YAPS and object-oriented p

Despite their success-story, artificial neural networks have one major disadvantage compared to other techniques: the inability to explain comprehensively how a trained neural network reaches its output; neural networks are not only (incorrectly) seen as a “magic tool” but possibly even more as a mysterious “black box.” Although much research has already been done to “open the box,” there is a not

We define the notion of convex-monotone system and prove that for such systems the state trajectory x(⋅) is a convex function of the initial state x(0) and the input trajectory u(⋅). This observation gives a useful class of nonlinear dynamical systems for which control design can be performed by convex optimization. Applications to evolutionary dynamics of diseases and voltage stability in power n

Popular Abstract in English In biotechnological industries, downstream processing is a bottleneck in the complete production process. There is a wish to reduce the costs and therefore one tries to operate separation technology in continuous mode. Conventional SMB is a continuous countercurrent separation process, which is based on mathematical modeling and simulation studies for separation of binIn biotechnological industries, downstream processing is a bottleneck in the complete production process. There is a wish to reduce the costs and therefore one tries to operate separation technology in continuous mode. Conventional SMB is a continuous countercurrent separation process, which is based on mathematical modeling and simulation studies for separation of binary mixtures of components.