نتایج جستجو برای: x ray transform
تعداد نتایج: 766054 فیلتر نتایج به سال:
zns nanoparticles were synthesized via a simple surfactant free microwave route. in this synthesis, thioacetamide was used as sulfur source. the effects of different parameters such as type of zinc precursor, time and power of irradiation on the morphology and particle size of the products have been investigated. the nanostructures were characterized by ...
Combined use of the X-ray (Radon) transform and the wavelet transform has proved to be useful in application areas such as diagnostic medicine and seismology. In the present paper, the wavelet X-ray transform is introduced. This transform performs one-dimensional wavelet transforms along lines in R n , which are parameterized in the same fashion as for the X-ray transform. It is shown that the ...
The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3/nano-γ-Al2O3 at room temperature in ethanol. This catalyst is characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy-disper...
The analysis of 3D discrete volumetric data becomes increasingly important as computation power increases. 3D analysis and visualization applications are expected to be especially relevant in areas like medical imaging and nondestructive testing, where elaborated continuous theory exists. However, this theory is not directly applicable to discrete datasets. Therefore, we have to establish theor...
the perovskite-type oxides strontium-substituted lanthanum nickelate (lsno) were prepared by a coprecipitation method in the present of octanoic acid as surfactant. the phase composition, morphology,lattice parameters and size of nanoparticles in these materials were characterized through fourier transform infrared spectroscopy (ft-ir), x-ray diffraction (xrd), scanning electron microscopy (sem...
We initiate the study of X-ray tomography on sub-Riemannian manifolds, for which Heisenberg group exhibits simplest nontrivial example. With language Fourier transform, we prove an operator-valued incarnation Slice Theorem, and apply this new tool to show that a sufficiently regular function is determined by its line integrals over geodesics. also consider family taming metrics g? approximating...
Abstract We report on a Fourier transform holography study, employing hard X-ray energies at 3rd generation storage ring. Nano-structures of various sizes and shapes have been measured in ultra small angle x-ray scattering configuration reaching resolution the holographic reconstructions about 50 nm. Reliable holograms obtained with 6.9×10 6 incident photons. Our results provide an important st...
Combined use of the X-ray (Radon) transform and the wavelet transform has proved to be useful in application areas such as diagnostic medicine and seismology. In the present paper, the wavelet X-ray transform is introduced. This transform performs one-dimensional wavelet transforms along lines in R n , which are param-eterized in the same fashion as for the X-ray transform. It is shown that the...
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