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Computational heat transfer in research and design of heat exchangers

This paper gives a brief summary of computational methods in heat transfer equipment, i.e., CFD (computational fluid dynamics) methods for thermal problems, and turbulence modeling for single phase applications in the design, research and development of heat exchangers. Some examples for real heat exchangers are shown to demonstrate how CFD methods can be used as R & D tools. Nevertheless, lim

Extensions to an Optimization-Based Multivariable Reduction Method

In this paper two extensions to an optimization based model reduction method are considered: frequency-weighted and parameter-dependent model reduction. The performed extensions are simple and natural, this fact illustrates the advantages of the method. Also, the methods may be applied using an exact model or frequency samples ofa model. We construct numerical examples to illustrate both extension

Vattenomsättning i några svenska städer

Den inre och yttre vattenomsättningen i sex svenska städer har studerats.Dagvatten från hårda ytor till kombinerade system har beräknats liksomdränering av mark och grundvatten till detta system. Diffus avrinningutanför spill- och dagvattensystem har också beräknats. Inläckage tillspillvattensystem är ganska lika i de sex städerna. Det diffusa flödet tillrecipienter beror på klimatfaktorer.The inner and outer water balance in six Swedish cities has been studied.Direct stormwater contribution to the combined system has beendetermined, as has drainage of soil and groundwater to this system.Diffuse runoff not being in the sewerage or stormwater systems has alsobeen determined. The leakage into the sewerage system is almost thesame in all cities. The diffuse runoff depends on climatic f

Orientation reflected on register: from historical perspectives

Languages can be classified into three types, e.g. situation-oriented (e.g. Russian, Chienese, etc.), speaker-oriented (e.g. Bulgarian, Turkish, etc.) and hearer-oriented (e.g. English, Danish, etc.) (Durst-Anderssen 2005, 2006, 2008). In this paper, it is argued that the difference in spoken and written discourse can be compared to different patterns in these classificatory types, and historical