نتایج جستجو برای: inversion structures

تعداد نتایج: 497111  

Journal: :European Physical Journal C 2023

Abstract Our analysis focus on the dragging effects accretion flows and jet emission in Kerr super-spinars. These attractors are characterized by peculiar structures as double tori, or special dragged tori ergoregion, produced balance of hydrodynamic centrifugal forces also super-spinars repulsive gravity. We investigate flows, constituted particles photons, from toroids orbiting a central supe...

Journal: :Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2005
Luís F Gonçalves Jimmy Espinoza Wesley Lee Jyh Kae Nien Joon-Seok Hong Joaquin Santolaya-Forgas Moshe Mazor Roberto Romero

OBJECTIVE The purpose of this study was to describe a method of 4-dimensional (4D) reconstruction of the cardiac chambers and outflow tracts using a combination of spatiotemporal image correlation, "inversion mode," and "B-flow" imaging. METHODS Spatiotemporal image correlation and the inversion mode were used in the examination of the volume data sets of 23 fetuses with congenital heart anom...

2002
Shin’ya Onizawa Hitoshi Mikada Hidefumi Watanabe Shikou Sakashita

We have developed a method for three-dimensional simultaneous velocity and density inversion using traveltimes of local earthquakes and gravity data. The purpose of this method is to constrain the velocity inversion and increase the spatial resolution of shallow velocity structures by introducing additional gravity data. The gravity data contributes to the Pand S-wave velocity models by imposin...

2006
C. J. SUMMERS E. GRAUGNARD D. P. GAILLOT

We report an investigation of luminescent and tunable photonic crystal structures formed by the infiltration and inversion of opal templates with high index and luminescent materials. Protocols are reported for the deposition of these materials and the properties of the resulting structures investigated by conventional structural and optical measurements. The properties of multi-layered and bac...

Shear-wave velocity ( ) is an important parameter used for site characterization in geotechnical engineering. However, dispersion curve inversion is challenging for most inversion methods due to its high non-linearity and mix-determined trait. In order to overcome these problems, in this study, a joint inversion strategy is proposed based on the particle swarm optimization (PSO) algorithm. The ...

Journal: :iranian journal of radiology 0
farida abesi dental materials research center, department of oral and maxillofacial radiology, dental faculty, babol university of medical sciences, babol, iran nima nikafshar student research committee, dental faculty, babol university of medical sciences, babol, iran sina haghanifar dental materials research center, department of oral and maxillofacial radiology, dental faculty, babol university of medical sciences, babol, iran; dental materials research center, department of oral and maxillofacial radiology, dental faculty, babol university of medical sciences, babol, iran. tel: +98-1132291408, fax: +98-1132291093 soraya khafri social medical and health department, babol university of medical sciences, babol, iran mahtab hamzeh department of pediatric dentistry, dental faculty, babol university of medical sciences, babol, iran

results there was no significant differences between if and conventional mode regarding visibility of mic (p > 0.05). conclusion although using if caused improved visibility of mic, the difference with conventional mode was not statistically different. patients and methods in this cross-sectional study, 2580 digital panoramic images of 18 to 70-year-old patients were inspected for presence of m...

Here in, an application of a new seismic inversion algorithm in one of Iran’s oilfields is described. Stochastic (geostatistical) seismic inversion, as a complementary method to deterministic inversion, is perceived as contribution combination of geostatistics and seismic inversion algorithm. This method integrates information from different data sources with different scales, as prior informat...

2014
Steven H. Collins Myunghee Kim Tianjian Chen Tianyao Chen

Ankle inversion-eversion compliance is an important feature of conventional prosthetic feet, and control of inversion, or roll, in robotic devices could improve balance for people with amputation. We designed a tethered ankle-foot prosthesis with two independently-actuated toes that are coordinated to provide plantarflexion and inversion-eversion torques. This configuration allows elegant, ligh...

Journal: :journal of chemical and petroleum engineering 2011
hozhabr sohbat zadeh hosein abolghasemi mohammad ghannadi maragheh amir khacpai

in this paper, we studied effect of different parameters including density, viscosity, interfacial tension and solute transfer concentration on phase inversion hold-up. the results showed that change in phase density ratio had no effect on phase inversion hold-up. it also disclosed that the phase viscosity ratio was the most effective parameter affecting phase inversion hold-up and each phase h...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید