<p style='text-indent:20px;'>We examine the complexity of constructing reduced order models for subsets variables needed to represent state power grid. In particular, we apply model reduction techniques DeMarco-Zheng grid model. We show that due oscillating nature solutions and absence timescale separation between resolved unresolved variables, construction accurate becomes highly non-tri...

In this contribution we examine certain variance properties of model reduction. The focus is on L2 model reduction, but some general results are also presented. These general results can be used to analyze various other model reduction schemes. The models we study are nite impulse respons (FIR) and output error (OE) models. We compare the variance of two estimated models. The rst one is estimat...

Paleolithic lithic assemblages are traditionally described on the bases of presence of a variety of tool types(typology) and of different knapping technologies. In this study we tried to investigate whether the presence ofdifferent groups of scrapers in the Mar-Tarik site assigned to the Middle Paleolithic represent specific function orjust different stages of the reduction process and constant...

marine industry requires continued development of new technologies in order to produce oil. an essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. in this study, structural model updating may be defined as the fit of an existing analytical model in the light of measu...

fuel cells belong to an avant-garde technology family for a wide variety of applications including micro-power, transportation power, stationary power for buildings and other distributed generation applications. the first objective of this contribution is to find a suitable reduced model of a solid oxide fuel cell (sofc). the derived reduced model is then used to design a state estimator. in th...