observer

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observer

[əb′zər·vər]
(control systems)
A linear system B driven by the inputs and outputs of another linear system A which produces an output that converges to some linear function of the state of system A. Also known as state estimator; state observer.
References in classic literature ?
This result has, also, been confirmed by other observers in the case of Hippeastrum with its sub-genera, and in the case of some other genera, as Lobelia, Passiflora and Verbascum.
Moreover, whenever complicated experiments are in progress, so careful an observer as Gartner would have castrated his hybrids, and this would have insured in each generation a cross with the pollen from a distinct flower, either from the same plant or from another plant of the same hybrid nature.
Just as the work was ended the scowling eye of Ishmael's assistant caught a glimpse of the figure of the attentive observer of their movements.
If the observer had then specially directed his attention to one of the more humble and less brilliant of these stellar bodies, a star of the fourth class, that which is arrogantly called the Sun, all the phenomena to which the formation of the Universe is to be ascribed would have been successively fulfilled before his eyes.
Another phenomenon would now have passed before the observer's eye, and the molecules situated on the plane of the equator, escaping like a stone from a sling of which the cord had suddenly snapped, would have formed around the sun sundry concentric rings resembling that of Saturn.
This illustrates how love of the marvellous may mislead even so careful an observer as Fabre and so eminent a philosopher as Bergson.
A greater change had come over Jane than over any other person in the brick house, but it had been wrought so secretly, and concealed so religiously, that it scarcely appeared to the ordinary observer. Life had now a motive utterly lacking before.
(With this method of observation it often happens that the observer, influenced by the direction he himself prefers, regards those as leaders who, owing to the people's change of direction, are no longer in front, but on one side, or even in the rear.)
An observer with anything of an eye for national types would have had no difficulty in determining the local origin of this undeveloped connoisseur, and indeed such an observer might have felt a certain humorous relish of the almost ideal completeness with which he filled out the national mould.
ABU DHABI, 4th September, 2019 (WAM) -- Two Emiratis have recently joined the observer membership of the Asian Football Confederation (AFC), bringing to four the number of Emirati observers at the AFC .
Another 32 WTO members participate in the Committee on Government Procurement as observers, of which nine are in the process of acceding to the GPA.
Azhar said EC has set certain criteria for appointing observers, like appointment from among qualified government agencies, non-governmental organisations (NGO) or eligible organisations registered with the Registrar of Societies or Companies Commission of Malaysia (only non-profit-oriented companies).