Exact(33)
We calculated the frequency of abnormalities and of persistent abnormalities (defined as occurring in every observation) observed during these 24 hour periods, and the range of observation values over a 24 hour period if at least two observations had been recorded.
Observation values were applied on the model.
With this monitoring infrastructure, more than ten million observation values are generated and stored every day.
AR describes time series as a linear function of previous observation values.
based on the absolute observation values generally has no rigorous physical justification.
where is the weighting factor, is an observation at time and is the average of historical observation values.
Similar(27)
The observation value of each event is x1, x2, …, x n respectively.
Firstly, replace indicator function in histogram by smooth kernel function, and then set estimation interval center as sample observation value.
FDIA theory based on nonlinear model is much more complicated because the state variable and observation value has nonlinear relationship.
The state value (f_{s}) is the "true value" and unobservable except the well data, and the state value (w) is regarded as "observation value".
The observation value can be expressed as val = valreal + Δ, which is a combination of the real value of the environment valreal and error Δ.
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