unstationary

See: moving
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This means that the data sets are unstationary and cannot be used directly in their nominal, raw data form.
in the number of works it is mentioned that the numerous variables of regressive equations (prices, incomes, rates of exchange of currency and so on) are dynamically changeable unstationary quantities between which the interdependency exists.
A new complex near-surface electromagnetic and seismic technique for 3-d research of inhomogeneous and unstationary medium, Engineering and environmental geophysics for the 21-st century.
In the end of this work the pressure distribution law is obtained into an explicit form for both, stationary and unstationary cases.
2, where the left graph pictures the unstationary status of the economy (where growth is still possible), and the right--the stationary one.
Even though most pieces are written in easy keys with no more than two voices per hand, some pieces call for strong independence within and between the hands, finesse of unstationary hand positions and determination of pedal and fingering choices.
1997b: A new complex near-surface electromagnetic and seismic technique for 3-d research of inhomogeneous and unstationary medium, Engineering and environmental geophysics for the 21st century.
These membrane models enable the prediction of the so-called dog-bone defect under stationary conditions, but they require the use of sophisticated techniques under unstationary conditions.