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  2. Modified Dietz method - Wikipedia

    en.wikipedia.org/wiki/Modified_Dietz_method

    The modified Dietz method [1] [2] [3] is a measure of the ex post (i.e. historical) performance of an investment portfolio in the presence of external flows. (External flows are movements of value such as transfers of cash, securities or other instruments in or out of the portfolio, with no equal simultaneous movement of value in the opposite direction, and which are not income from the ...

  3. Availability - Wikipedia

    en.wikipedia.org/wiki/Availability

    Availability measures are classified by either the time interval of interest or the mechanisms for the system downtime. If the time interval of interest is the primary concern, we consider instantaneous, limiting, average, and limiting average availability.

  4. Time-weighted return - Wikipedia

    en.wikipedia.org/wiki/Time-weighted_return

    The Simple Dietz method [3] applies a simple rate of interest principle, as opposed to the compounding principle underlying the internal rate of return method, and further assumes that flows occur at the midpoint within the time interval (or equivalently that they are distributed evenly throughout the time interval). However, the Simple Dietz ...

  5. Transmit-after-receive time delay - Wikipedia

    en.wikipedia.org/wiki/Transmit-after-receive...

    In telecommunications, transmit-after-receive time delay is the time interval from removal of RF energy at the local receiver input until the local transmitter is automatically keyed on and the transmitted RF signal amplitude has increased to 90% of its steady-state value.

  6. Coherence time (communications systems) - Wikipedia

    en.wikipedia.org/wiki/Coherence_time...

    Coherence time is actually a statistical measure of the time duration over which the channel impulse response is essentially invariant, and quantifies the similarity of the channel response at different times. In other words, coherence time is the time duration over which two received signals have a strong potential for amplitude correlation.

  7. Receive-after-transmit time delay - Wikipedia

    en.wikipedia.org/wiki/Receive-after-transmit...

    In telecommunications, receive-after-transmit time delay is the time interval between (a) the instant of keying off the local transmitter to stop transmitting and (b) the instant the local receiver output has increased to 90% of its steady-state value in response to an RF signal from another transmitter.

  8. Method of averaging - Wikipedia

    en.wikipedia.org/wiki/Method_of_averaging

    Hence, has been chosen accordingly in order to maintain the boundedness of the solution and the time interval of validity of the approximation is < <. The average theorem assumes existence of a connected and bounded region D ⊂ R n {\displaystyle D\subset \mathbb {R} ^{n}} which affects the time interval L {\displaystyle L} of the result validity.

  9. Godunov's scheme - Wikipedia

    en.wikipedia.org/wiki/Godunov's_scheme

    The state variables obtained after Step 2 are averaged over each cell defining a new piecewise constant approximation resulting from the wave propagation during the time interval . To be consistent, the time interval Δ t {\displaystyle {\Delta t}\,} should be limited such that the waves emanating from an interface do not interact with waves ...