A reduction of the computational complexity of bank of Kalman filters is proposed. The algorithm is focused in fault detection and isolation problems. It is shown that the orders of individual filters in the bank can be lower than the respective filtered process model order. The original model state variables are not estimated. Linear functions of noise samples are the newly estimated variables.

background noise exposure is known as a risk factor for hearing loss and one of its effects is noise-induced stress. cortisol as a stress hormone is used in noise-induced stress assessments. objectives the aim of this study was to measure and compare saliva cortisol concentrations in the morning and evening in normal work day and rest day in both case and control groups and to assess the associ...

16 The responses of cortical neurons to repeated presentation of a stimulus are highly variable, yet 17 correlated. These “noise correlations” reflect a low-dimensional structure of population dynamics. 18 Here, we examine noise correlations in 22,705 pairs of neurons in primary visual cortex (V1) of 19 anesthetized cats, during ongoing activity and in response to artificial and natural visual ...

Abstract To analyse the thermal noise of the pendulum mode of a suspended mirror, we interferometrically detect the differential movement of two mirrors suspended as multiple-stage pendulums. We present the set-up of this experiment and the current sensitivity, and also the different steps that we took in the past to increase the sensitivity, which include an auto alignment of the laser beam in...

Differential amplifiers can be an appropriate solution in the implementation of radio astronomy receivers, due to their efficient interference and harmonic isolation. In this paper, two different topologies are presented. The first one consists of two single ended amplifiers in a balanced topology. The second one is formed by cascading two simple differential stages. Both circuits operate in th...

Wideband low-noise amplifiers (LNAs) are used in receivers processing several signal channels such as TV cable modem, multiband mobile terminals and base stations. High sensitivity applications require sufficient gain, good isolation and a noise figure (NF=10·log10(F)) below 3dB over a wide frequency range. Moreover, source impedance matching (i.e. ZIN=RS) is usually wanted to limit reflections...

The problem of residual generation for fault detection and isolation in the presence of measurement noise for a class of non-linear systems is considered. Exploiting the tools and the results of the geometric approach to the problem of residual generation, a method is proposed for the design of a filter which attenuates the effect of the measurement noise on the residual in the case in which th...

conclusions due to the long exposure to the loud noise during the day, hearing loss in drivers is significant. the left ear displays greater loss than the right ear. therefore, strategies to prevent hearing loss in drivers could include education, lifestyle changes and compliance issues related to hearing health, use of personal protective equipment, conducting periodic examinations and early t...

In this article, a fast krill herd algorithm is developed for prognosis of hybrid mechatronic system using the improved Wiener degradation process. First, diagnostic bond graph used to model and derive global analytical redundancy relations. Based on relations, fault signature matrix mode change isolation can be obtained. Second, in order determine true faults from suspected candidates after is...

The existence of damage in different members of a structure can be posed as a fault detection problem. It is also necessary to isolate structural members in which damage exists, which can be posed as a fault isolation problem. It is also important to detect the time instants of occurrence of the faults/damage. The structural damage detection filter developed in this paper is a model-based fault...