INTRODUCTION: Inversion-prepared b-SSFP imaging is a common technique for non-contrast-enhanced (non-CE) MR angiography (MRA) of the renal arteries [15]. With this method, a slab-selective inversion of the volume of interest is followed by a delay TI and subsequent data acquisition. While inverted stationary tissues recover during TI and appear with low signal, non-inverted blood enters the lab...

Frequency-space domain full-wave tomography is a promising technique for delineating detailed subsurface structure with high resolution. However, this method requires criteria for the selection of a set of optimal temporal frequency components, to achieve stability in the sequence of inversion processes together with computational efficiency. We propose a method of selecting optimal temporal fr...

In this paper, high-precision joint inversion of evaporative duct based on dual frequency radar sea clutter data is analyzed to study the abnormal environment phenomenon that occurs over offshore surfaces. As information retrieved by radars with different frequencies inconsistent, a optimization model dynamic penalty factor proposed, which can improve degree conformity between measured power an...

INTRODUCTION: Homodyne detection is a partial Fourier reconstruction method that is implemented on many commercial scanners [1]. It is commonly used to reduce the number of high-frequency phase encodes or to correct for off-centered, partial echoes to achieve shorter effective TEs. It uses low frequency k-space data to estimate the phase modulation of each image. Missing k-space lines are fille...

We propose a novel numerical inversion algorithm for the coefficients of parabolic partial differential equations, based on model reduction. The study is motivated by the application of controlled source electromagnetic exploration, where the unknown is the subsurface electrical resistivity and the data are time resolved surface measurements of the magnetic field. The algorithm presented in thi...

The paper presents unified analytical solution for combining high-frequency and low-frequency economic time-series by additive and proportional Denton methods with parametrical dependence on the initial values of variable and indicator in evident form. This solution spans Denton’s original and Cholette’s advanced benchmarking initial conditions as the subcases. Computational complexity of the o...

language has different functions and uses in society and social phenomena in functionalist grammar. so, linguistic phenomena can be studied through this approach. on the basis of functional theory, patterns of experience manifest in form of processes through idealistic meta-functions. accordingly, we can realize the linguisticbehavior of the poet or the writer in world representation studying d...

Current inversion condition leads to incorrect operation of current based directional relay in power system with series compensated device. Application of the intelligent system for fault direction classification has been suggested in this paper. A new current directional protection scheme based on intelligent classifier is proposed for the series compensated line. The proposed classifier uses ...