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Regulační diagramy s rozšířenými mezemi a způsobilost procesů
Michálek, Jiří
The assumptions about behaviour of observed quality variables demanded by classical Shewhart diagrams are not often satisfied as practice shows. These assumptions concern Gaussian density function whose parameters, i.e. mean value and dispersion must be constant in time. As this demand need not be satisfied in practice therefore processes with changing mean value or dispersion have begun to analyse. This fact is changing the statistical control and capability of such manufacture processes.
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Access and metropolitan area optical networks - state of the art and prospects for thir development
Kuchar, Anton
Optical metropolitan area networks are already being implemented in many countries and the optical access networks are at last taking off on a wider scale in some countries. Still, they present a bottleneck that has to be removed in order to satisfy the ever-growing demand for higher access bit rates. Technologies, architectures and services encountered in the optical access and metropolitan area networks, the state of affairs and the trends of development are discussed in the paper.
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