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The time–temperature shift factor can also be described in terms of the activation energy (E a). By plotting the shift factor a T versus the reciprocal of temperature (in K), the slope of the curve can be interpreted as E a /k, where k is the Boltzmann constant = 8.64x10 −5 eV/K and the activation energy is expressed in terms of eV.
The equation can be used to fit (regress) discrete values of the shift factor a T vs. temperature. Here, values of shift factor a T are obtained by horizontal shift log(a T ) of creep compliance data plotted vs. time or frequency in double logarithmic scale so that a data set obtained experimentally at temperature T superposes with the data set ...
For any complex number written in polar form (such as r e iθ), the phase factor is the complex exponential (e iθ), where the variable θ is the phase of a wave or other periodic function. The phase factor is a unit complex number , i.e. a complex number of absolute value 1 .
As an example, consider two real valued functions and differing only by an unknown shift along the x-axis. One can use the cross-correlation to find how much g {\displaystyle g} must be shifted along the x-axis to make it identical to f {\displaystyle f} .
Distant point with a parallax shift of one arc second from a base of one astronomical unit. ≡ 648 000 / π au [ 10 ] [ 11 ] ≈ 30 856 775 814 913 700 m [ 12 ]
U.S. President Donald Trump on Thursday said he would work with Congress to ensure the speedy adoption of a new computerized air traffic control system after last week's collision of an Army ...
There are a few main factors behind the massive growth in property prices over the past few years: Increased demand during the pandemic and previously low mortgage rates spiked prices.
Factors such as your material choices, and construction all play a role in how much your kitchen reno will end up costing you. ... You can find affordable machine-grade subway tile for $4 per ...