或者发神韵
发表于 2025-3-25 05:38:05
An elementary example would be a signal having only low-frequency and high-frequency components. A . filter would permit only the low frequencies to be transmitted, the high frequencies being suppressed or attenuated. The converse is true for passing the high frequencies while suppressing the low fr
cardiopulmonary
发表于 2025-3-25 09:22:18
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Osteoarthritis
发表于 2025-3-25 14:23:52
Heiko Ohlingal basis. One differentiates between . (projected or expected) and . volatility. Implied volatility is the volatility as implied by options prices traded in the market: in the following the focus will be mainly on implied volatility and its possible applications.
创作
发表于 2025-3-25 18:52:19
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characteristic
发表于 2025-3-25 23:25:10
Heiko Ohlinglogy, sensing, robust and optimal open- and closed-loop contThe dramatically increasing requirements of mobility through road-, rail- and airborne transport systems in the future necessitate non-evolutionary impro- ments of transportation systems. Without severe implications concerning the environme
不能平静
发表于 2025-3-26 01:26:41
hieve this. However, if the POD modes are derived from a set of snapshots obtained from one flow condition only, the resulting modes will become less and less valid for a flow field that is for example altered by the effect of feedback flow control. In the past, a shift mode has been added to accoun
ureter
发表于 2025-3-26 04:22:09
Heiko Ohling The first set of experiments is conducted in quiescent air and these results are used to calibrate a numerical model which simulates the plasma-actuator in an existing RANS (Reynolds Averaged Navier-Stokes) code. The second set of experiments involves a flat-plate boundary layer at various free-str
Pulmonary-Veins
发表于 2025-3-26 10:30:52
Heiko Ohlingo air vehicle Reynolds numbers (20,000≤.≤140,000). Pulsing was achieved by modulating the high frequency plasma excitation voltage. The actuators were calibrated directly using a laser doppler anemometer, with and without free-stream velocity, and this allowed the quantification of both steady and u
新奇
发表于 2025-3-26 15:54:56
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CURT
发表于 2025-3-26 17:49:29
Heiko Ohlingnts from the actuation systems are outlined and a critical review of available actuation technology is offered. Since the relevance of a given actuator depends on the application, separation control is considered over a wide range of operational conditions..Unsteady zero-net-mass-flux (ZNMF) periodi