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  2. General time- and transfer constant analysis - Wikipedia

    en.wikipedia.org/wiki/General_time-_and_transfer...

    The general time- and transfer-constants (TTC) analysis [1] is the generalized version of the Cochran-Grabel (CG) method, [2] which itself is the generalized version of zero-value time-constants (ZVT), which in turn is the generalization of the open-circuit time constant method (OCT). [3]

  3. Open-circuit time constant method - Wikipedia

    en.wikipedia.org/wiki/Open-circuit_time_constant...

    An increase in this variable means the higher pole is further above the corner frequency. The y-axis is the ratio of the OCTC (open-circuit time constant) estimate to the true time constant. For the lowest pole use curve T_1; this curve refers to the corner frequency; and for the higher pole use curve T_2. The worst agreement is for τ 1 = τ 2.

  4. Time constant - Wikipedia

    en.wikipedia.org/wiki/Time_constant

    In an increasing system, the time constant is the time for the system's step response to reach 1 − 1 / e ≈ 63.2% of its final (asymptotic) value (say from a step increase). In radioactive decay the time constant is related to the decay constant ( λ ), and it represents both the mean lifetime of a decaying system (such as an atom) before it ...

  5. Orr–Sommerfeld equation - Wikipedia

    en.wikipedia.org/wiki/Orr–Sommerfeld_equation

    The Orr–Sommerfeld equation, in fluid dynamics, is an eigenvalue equation describing the linear two-dimensional modes of disturbance to a viscous parallel flow. The solution to the Navier–Stokes equations for a parallel, laminar flow can become unstable if certain conditions on the flow are satisfied, and the Orr–Sommerfeld equation determines precisely what the conditions for ...

  6. Norton's theorem - Wikipedia

    en.wikipedia.org/wiki/Norton's_theorem

    In direct-current circuit theory, Norton's theorem, also called the Mayer–Norton theorem, is a simplification that can be applied to networks made of linear time-invariant resistances, voltage sources, and current sources. At a pair of terminals of the network, it can be replaced by a current source and a single resistor in parallel.

  7. Mortgage and refinance rates for Dec. 30, 2024: Average ... - AOL

    www.aol.com/finance/mortgage-and-refinance-rates...

    The current average rate for a 30-year fixed mortgage is 7.03% for purchase and 7.07% for refinance — up 10 basis points from 6.93% for purchase and 11 basis points from 6.96% for refinance ...

  8. Jada Pinkett Smith Says 'No Nudity' Was ‘Always the ... - AOL

    www.aol.com/jada-pinkett-smith-says-no-205457918...

    Jada Pinkett Smith is getting candid about her approach to sex scenes on camera. Waithe, 40, asked about shooting the F. Gary Gray-directed hit, costarring Queen Latifah, Vivica A. Fox and ...

  9. Boeing’s terrible year is ending with the worst aviation ...

    www.aol.com/boeing-terrible-ending-worst...

    Boeing’s very bad year ended tragically on Sunday, as a 737 flown by Korean discount carrier Jeju Air crashed, killing 179 passengers and crew on board.