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The stability properties of a periodically loaded non-linear dynamic system are investigated and special attention is given to damping effects. Advantage is taken of the Floquet theory and the FE-approach is applied to a hinged beam where the damping is described by a standard material model and where even damping effects at the hinges are considered. Comparisons are made with experimental results
A new method to estimate the microstructural parameters of anisotropic twophase composite material is derived. The parameters are estimated using information from measurements or from numerical experiments. The method is used to derive new bounds on the elective tensor that incorporates information from measurements of a related parameter. These new bounds are called cross-property bounds. New tig
Information and Communication Technologies for education (ICT4E) have been playing an increasingly important role in schooling and training worldwide. On the one hand, they are expected to bridge various divides e.g. between developed and developing countries, urban and rural regions, affluent and poor neighborhoods etc., by spreading the most up-to-date knowledge and skills into every classroom o
Huvudsyftet med rapporten är att göra en kartläggning av nationella innovationsstrategier och en lägesbeskrivning om hur man behandlar innovations frågor i andra länder. Målet är att bidra till en förståelsegrund för hur det fortsatta arbetet med att öka möjligheterna till att en innovativ byggindustri i Sverige ska kunna utvecklas. Förståelsen för innovationssystem och processer har ökat, där nå
For many industrial processes, it is of interest to design a decoupling precompensator. The precompensator makes it possible to design controllers based on single-input-single-output models of the process. A model of the process must be known to design the precompensator. This paper shows how the precompensator can be designed adaptively using input-output measurements. The precompensator is first
This paper focuses on the discussion of the general characteristics of 12 Swedish learners’ oral production of the Chinese aspect markers le, guò, zài, and zhe. Their oral performance is discussed with respect to Krashen’s Monitor hypothesis (1978, 1981, 1987) on the role of conscious learning. The functions of the Monitor in planning, editing and correcting is discussed respectively in relation t
