نتایج جستجو برای: vertical transversely isotropy vti
تعداد نتایج: 99233 فیلتر نتایج به سال:
We show that nonreciprocal optical Bloch-like oscillations can emerge in transversely magnetized waveguide arrays in the presence of an effective index step between the waveguides. Normal modes of the system are shown to acquire different wavenumbers in opposite propagation directions. Significant differences in phase coherence and decoherence between these normal modes are presented and discus...
PURPOSE To evaluate the diagnostic performance of ARFI imaging in differentiating between benign and malignant thyroid nodules <1 cm. MATERIALS AND METHODS 173 pathologically proven thyroid nodules (77 benign, 96 malignant) in 157 patients were included in this study. Receiver-operating characteristic curve (ROC) analyses were performed to assess the diagnostic performance of conventional ult...
OBJECTIVES/HYPOTHESIS To identify factors associated with the rate of developing cholesteatoma following ventilation tube insertion (VTI). STUDY DESIGN A population-based retrospective cohort study. METHODS Administrative health data from all private and public hospitals in Western Australia for children who had at least one VTI from 1980 to 2004 was used to identify subsequent hospital adm...
Abstract The estimation of physical and anisotropic parameters is great importance for the characterization fractured reservoirs. Vertical fractures developing in a laterally isotropic (VTI) setting are equivalent to orthotropic (OA) media common stratified shale To obtain independent information, novel reflection coefficient approximation containing derived improve stability inversion media. s...
The aim of the study was to investigate the appropriate home ventilator settings for patients with amyotrophic lateral sclerosis (ALS).In total, 71 patients with ALS, who had received either a noninvasive positive pressure ventilation (NIPPV) or tracheostomy positive pressure ventilation (TPPV), were included. Accordingly, patients were divided into 2 groups (the TPPV and NIPPV groups). We retr...
High-order finite-difference methods are commonly used in wave propagators for industrial subsurface imaging algorithms. Computational aspects of the reduced linear elastic vertical transversely isotropic propagator are considered. Thread parallel algorithms suitable for implementing this propagator on multi-core and many-core processing devices are introduced. Portability is addressed through ...
The approximation of normal moveout is essential for estimating the anisotropy parameters of the transversally isotropic media with vertical symmetry axis (VTI). We have approximated the long-offset moveout using the Padé approximation based on the higher order Taylor series coefficients for VTI media. For a given anellipticity parameter, we have the best accuracy when the numerator is one orde...
The significant influence of transverse isotropy on mechanical behaviours soil has long been recognised, but it is still difficult to capture well under 3D stress conditions. In this study, a method establishing non-orthogonal elastoplastic (NOEP) constitutive models for transversely isotropic (TI-soil) proposed. effect considered by extending the characteristic with fabric tensor TI-soil. exte...
BACKGROUND Arterial tortuosity is described as a common and distinctive feature of Loeys-Dietz syndrome (LDS), yet reports on arterial tortuosity are based on qualitative observations and none have investigated an association between tortuosity and cardiovascular outcomes in LDS or other connective tissue disorders. METHODS AND RESULTS We performed a retrospective analysis of 90 patients ≤50 ...
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