نتایج جستجو برای: ray methods
تعداد نتایج: 2121726 فیلتر نتایج به سال:
We present a new Bayesian method for reconstructing the parent distributions of X-ray spectral parameters active galactic nuclei (AGN) in large surveys. The uses probability distribution function (PDF) posteriors obtained by fitting consistent physical model to each object with method. PDFs are often broadly distributed and may systematic biases, such that naive point estimators or even some st...
in reality, most structures involved in geotechnical engineering are three dimensional in nature, and although in many, plane strain or axisymmetric approximations are reasonable, there are some, for which 3-d treatment is required. the quantity of data, and the size of the various vectors and matrices involved in such analysis, increase dramatically. this has sever implications for computer r...
introduction individual x-ray diffraction patterns of biological tissues are obtained via interference of coherent scattering with their electrons. many scientists have distinguished normal and cancerous breast tissue, bone density, and urinary stone types using the x-ray diffraction patterns resulting from coherent scattering. the goal of this study was to introduce an optimized method for obt...
all analytical methods are generally based on the measurement of a parameter or parameters which are somehow related to the concentration of the species.an ideal analytical method is one in which the concentration of a species can be measured to a high degree precision and accuracy and with a high sensitivity. unfortunately finding such a method is very difficult or sometimes even impossible.in...
In recent years, interactive ray tracing has become a reality, although mainly by using clustered workstations and sophisticated acceleration structures. On non-clustered computer architectures this is still not an easy task, especially when rendering animated scenes, even though the computation power of modern workstations is increasing rapidly. In this paper we propose known image-space rende...
nowadays various methods are presented for synthesis of barium strontium titanate (bst) nanopowders with different morphology and properties. each of these (bst)s has got individual characterization that makes it suitable for a special application. every method has a special quality, causes it to have preference over the other methods. low processing temperature is a desired point which most of...
ABSTRACT Variable γ-ray emission from blazars, one of the most powerful classes astronomical sources featuring relativistic jets, is a widely discussed topic. In this work, we present results variability study sample 20 blazars using (0.1–300 GeV) observations Fermi/LAT telescope. Using maximum likelihood estimation (MLE) methods, find that probability density functions best describe blazar flu...
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