On-line measurement of tra c can improve the quality of network monitoring and call admission control algorithms by providing reliable estimates of QoS parameters. We propose to estimate QoS by tting an appropriate function to the bu er occupancy distribution of a singleserver rst-comerst-served queue. We collect samples of the bu er occupancy distribution just after packet arrivals in the queu...

In order to perform on-line measuring and detection of PD signals, a total solution composing of an HFCT, A/D converter and a complete software package is proposed. The software package includes compensation of HFCT contribution, filtering and noise reduction using wavelet transform and soft calibration routines. The results have shown good performance and high accuracy. Keywords—Partial Discha...

This paper introduces a new surface measurement method for potential online surface measurement application. It features high stability due to using near common-path configuration combined with active stabilisation. The active stabilisation is supplied by the use of a multiplexed reference interferometer and piezo-electric translator mounted mirror. The active compensation makes the system resi...

Shape is a key characteristic to determine the quality of outgoing flat-rolled products in the steel industry. It is greatly influenced by flatness, a feature to describe how the surface of a rolled product approaches a plane. Flatness is of the utmost importance in steelmaking, since it is used by most downstream processes and customers for the acceptance or rejection of rolled products. Flatn...