Starting from the classical Shallow Water Equations, considering the bed level as an additional variable, and adding to the system an equation imposing its time invariance, we show that this wave is a contact wave, across which one of the Riemann invariants, namely the energy, is not constant.
Physical and physiological invariance laws, in particular time invariance and local symmetry, are at the outset of an abstract model.
A time invariance nature of data exists (Sullivan and Woodward 1994). .
This discrepancy due to incomplete time invariance can be exploited as a new method for characterizing damage by defining damage indices that quantify the departure from time reversal invariance.
The combining of Equations 3 and 4 implies the time invariance ∑ i = 1 N pu b i ( t ) = b tot.
Even though we tested time invariance using three times of measurement, this study is cross-sectional.
To derive a unique evolutionary null model we will assume time invariance of the scaling laws.
Only at residual level time invariances exist.
Another time constraint is imposed by the foreign ministers.
Hard time windows are imposed by constraints (39).
