If the variables are non-stationary, then the test is done using first (or higher) differences.

If the process has a unit root, then it is a non-stationary time series.

The ranch's non-stationary staff are assigned unit numbers, by which they identify themselves on the radio.

The model would be non-stationary in this case.

This principle of energy variation is applied also to non-stationary gravity fields.

These random processes can be either stationary or non-stationary.

In fact, statistically unsteady (or non-stationary) flows can equally be treated.

Another example is the factor , which includes a (non-stationary) seasonality of period 12.

In statistics, a unit root test tests whether a time series variable is non-stationary using an autoregressive model.

In addition, time-series analysis can be applied where the series are seasonally stationary or non-stationary.

The main advantage of recurrence plots is that they provide useful information even for short and non-stationary data, where other methods fail.

Heart sounds are a non-Stationary process making it difficult to use some Digital signal processing techniques.

The reason is that Pinatubo happened under a warm and non-stationary background with increasing greenhouse gas forcing.

For non-stationary states, such as pulses, the ensemble is made up of many pulses.

Although, this model, which is restricted only on the frozen spin networks, exhibits a non-stationary expansion of the universe.

If the variables are non-stationary, then some concepts of choosing optimal time intervals are needed.

A signal tone is played to alert the player that there is a non-stationary enemy now in the playing field.

An important type of non-stationary process that does not include a trend-like behavior is the cyclostationary process.

Such a process is non-stationary.

The satellites each had a mass of approximately 1,800 kilograms and are operated from non-stationary geosynchronous orbits.

Elaborate methods developed by Hambardzumyan were applied in the research of gas shells of the non-stationary stars.

If the signals are non-stationary, (and therefore not ergodic), the above formulations may not be appropriate.

The following picture shows that coordinate descent iteration may get stuck at a non-stationary point if the level curves of a function are not smooth.

Similarly, non-stationary noise can also be sparsely represented by a noise dictionary, but speech cannot.

SSA allows the separation of the stationary from the non-stationary sources in an observed time series.

The effect is to better model sources that are likely to be nonstationary.

If however the electrons are in nonstationary states, they can be thought of as "moving."

It is designed to work well for data that are nonstationary and nonlinear.

The effect in either case is to model both stationary and nonstationary sources effectively.

Therefore, they persistently create a nonstationary world in which only the relatively recent past has valid data.

For nonstationary process, there are many more challenges.

It is bounded because we mutually create nonstationary worlds.

In modern parlance, the nonstationary ideal is normal.

The potential flow approach occurs in the modeling of both stationary as well as nonstationary flows.

Since the decomposition is based on the local characteristic time scale of the data, it can be applied to nonlinear and nonstationary processes.

Nonstationary flow about a wing-aileron-tab combination including aerodynamic balance (1942)

Problems of the asymptotic theory of nonstationary vibrations.

The nonstationary fluctuations of the stream are represented by a distribution of quadrupole sources in the same volume.

Chebyshev iteration avoids the computation of inner products as is necessary for the other nonstationary methods.

The HHT provides a new method of analyzing nonstationary and nonlinear time series data.

Anomalous diffusion as modeled by a nonstationary extension of Brownian motion, Phys.

Vince and I want to say that natural rationality is bounded to models of intermediate complexity because we collectively and persistently create nonstationary worlds together.

A Trojan wave packet is a wave packet that is nonstationary and nonspreading.

The wires are notoriously nonstationary, since they are made not of copper but of fluid fats, water, electrolytes, and the electrical charges running through them.

Since the Brownian surface represents a Gaussian process with a nonstationary covariance function, one can use the Cholesky decomposition method.

MM implies that the value of the continuum is and that the ideal of nonstationary sets on ω is -saturated.

"Discussion of 'An analysis of global warming in the Alpine region based on nonlinear nonstationary time series models' by Battaglia and Protopapa".

Financial applications: Huang et al. [2003b] applied HHT to nonstationary financial time series and used a weekly mortgage rate data.

Depending on the surface roughness and particle size, particulate media might exhibit nonstationary data-dependent transition or medium noise rather than colored stationary medium noise.

The classical Hurst exponent corresponds to the second moment for stationary cases and to the second moment minus 1 for nonstationary cases .