نتایج جستجو برای: 1d sh transfer functions show indeed a weak amplification for frequencies above 2 hz
تعداد نتایج: 16721503 فیلتر نتایج به سال:
Thermoacoustic instabilities in gasturbine combustor systems can be predicted the design phase with a thermoacoustic network model. In this model, coupling between acoustic pressure fluctuations and combustion rate is described by Flame Transfer Function. The present paper introduces new, efficient, robust method for deriving FTF from CFD predictions means of discrete multi-frequency sinusoidal...
abstract: in this thesis, we focus to class of convex optimization problem whose objective function is given as a linear function and a convex function of a linear transformation of the decision variables and whose feasible region is a polytope. we show that there exists an optimal solution to this class of problems on a face of the constraint polytope of feasible region. based on this, we dev...
We developed a new technique of inverting short-period (0.5–2 Hz) P waveforms for determining small earthquake (M 3.5) focal mechanisms and moments, where magnitude 4 events with known source mechanisms are used to calibrate the “unmodeled” structural effect. The calibration is based on a waveform cluster analysis, where we show that clustered events of different sizes, for example, M 4 versus ...
The main purpose of the paper is the numerical analysis of seismic site effects in Caracas (Venezuela). The analysis is performed considering the Boundary Element Method in the frequency domain. A numerical model including a part of the local topography is considered, it involves a deep alluvial deposit on an elastic bedrock. The amplification of seismic motion (SH-waves, weak motion) is analyz...
power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...
Inner (IHC) and outer (OHC) hair cell receptor potentials were recorded during stimulation with combinations of high-frequency (HF) tones and a 100 Hz tone burst of constant level (80 dB SPL). For frequencies at and below characteristic frequency (CF), OHC AC receptor potentials were suppressed by the 100 Hz tone at levels of the HF tone below about 70 dB SPL (the initial steep part of the AC/l...
Transfer functions are constantly used in both Seismology and Geotechnical Earthquake Engineering to relate seismic ground motion at different depths within strata. In the context of diffusive theory, they also appear expression imaginary part 1D Green’s functions. spite their remarkable importance, mathematical structure is not fully understood yet, except simplest cases two or three layers mo...
in this thesis a calibration transfer method is used to achieve bilinearity for augmented first order kinetic data. first, the proposed method is investigated using simulated data and next the concept is applied to experimental data. the experimental data consists of spectroscopic monitoring of the first order degradation reaction of carbaryl. this component is used for control of pests in frui...
Initially, psychometric functions were measured for the detection of amplitude modulation (AM) or frequency modulation (FM), using a two-alternative forced-choice (2AFC) task. Carrier frequencies were 125, 1000, and 6000 Hz, and modulation rates were 2, 5, and 10 Hz. For the two lower carrier frequencies, FM detection tended to be best at the lowest modulation rate while AM detection was best a...
SUMMARY The 2015 Mw 7.8 Gorkha, Nepal earthquake is the largest event to have struck capital city of Kathmandu in recent times. One its surprising features was frequency content recorded ground motion, exhibiting a notable amplification at low frequencies (<2 Hz) and contrasting depletion higher frequencies. latter has been partially attributed damper behaviour basin. While such weak hig...
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