نتایج جستجو برای: attenuation quality factor
تعداد نتایج: 1597558 فیلتر نتایج به سال:
A direct method for the measurement of the optical attenuation coefficient and the scattering anisotropy parameter based on applying the extended Huygens-Fresnel principle to optical coherence tomography images of blood is demonstrated. The images are acquired with a low-power probing beam at the wavelength of 1300 nm. Values of 12.15 mm(-1) and 0.95 are found for the total attenuation coeffici...
There are different approaches towards estimating the signal strength in indoor environment, which includes models such as empirical and deterministic models. Empirical Models are simple but less accurate whereas deterministic models have more accuracy but much more complex. In this paper we have identified some limitations of the most widely used empirical model i.e. ‘Wall Attenuation Model’ a...
Time-domain seismic forward and inverse modeling for a dissipative medium is vital research topic to investigate the attenuation structure of Earth. Constant Q, also called frequency independence quality factor, common assumption Q inversion. We propose first- second-order nearly constant models generalized standard linear solid type, using novel Q-independent weighting function approach. The t...
ultrasonic testing (ut), a nondestructive testing (ndt) method, is under development for quality determination of agricultural products, although it has long been used in the food industry. determination and measurement of product quality are important in modern agricultural research. noninvasive/nondestructive quality determination is a novel aspect of the postharvest process in which paramete...
The coda wave decay (CWD) method was used to estimate the quality factor from amplitude rate for broadband seismic stations (IBDR, MSL, and NSR4) using a single backscattering model. This research aims calculate attenuation coefficient frequency-dependent (α) three compare them comprehend details of Earth's crust structure in those stations. Then, test if they are homogenous or not. Also, inves...
objectives: there have been numerous attempts to construct non-monetary indices of social and economic satisfaction by combining in a single statistic a variety of different factors that are thought to influence human well-being. method: the concept of quality of life (qol) as an aggregate measure of people’s well-being in a certain country, region, or social stratum. the economist intelligence...
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