نتایج جستجو برای: truncation map

تعداد نتایج: 205187  

Journal: :Blood 1994
A Bashey L Healy C J Marshall

Granulocyte colony-stimulating factor (G-CSF) can elicit responses that include proliferation, granulocytic differentiation, and activation of cellular functions in target cells. The biochemical pathways responsible for transduction of these signals from the G-CSF receptor (G-CSFR) have not been defined. In this report, we show that, in murine (NFS-60) and human (OCI-AML 1) myeloid leukemia cel...

Journal: :BMJ case reports 2014
Naoya Matsumoto Yasuyuki Suzuki Shunichi Yoda Atsushi Hirayama

To cite: Matsumoto N, Suzuki Y, Yoda S, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2014205407 DESCRIPTION Recognition of the truncation artefact is important for the control of image quality on myocardial perfusion images in single-photon emission CT (SPECT). Truncation artefact is usually seen in obese patients who may deviate from a γ-ray detector fi...

Journal: :Applied sciences 2022

Using the symbolic calculation program Mathematica and based on power series expansions of common latitude with geodetic as a variable, geocentric variable are derived. The coefficients two groups formulas ellipsoid eccentricity e third flattening n, which make more uniform. Taking CGCS2000 an example, numerical analysis is applied to verify accuracy reliability derived expansions. By analyzing...

Journal: :Numerische Mathematik 2021

It is well known that the Fourier series Dirichlet-to-Neumann (DtN) boundary condition can be used to solve Helmholtz equation in unbounded domains. In this work, applying such DtN and using finite element method, we analyze a two dimensional transmission problem describing elastic waves inside bounded closed obstacle acoustic outside it. We are mainly interested analyzing of order establish we...

In this article, we propose an adaptive grid based on mesh equidistribution principle for two-parameter convection-diffusion boundary value problems with continuous and discontinuous data. A numerical algorithm based on an upwind finite difference operator and an appropriate adaptive grid is constructed. Truncation errors are derived for both continuous and discontinuous problems. Parameter uni...

2003
Hans Moosmüller Patrick Arnott

Ideal integrating nephelometers integrate light scattered by particles over all directions. However, real nephelometers truncate light scattered in near-forward and near-backward directions below a certain truncation angle ~typically 7°!. This results in truncation errors, with the forward truncation error becoming important for large particles. Truncation errors are commonly calculated using M...

2009
X. Yin S. Shah A. C. Larson

INTRODUCTION Accurate R2* measurements are critical for many quantitative imaging applications. R2* is estimated via mono-exponential fitting of signal decay within a series of gradient echo (GRE) images sampled at increasing TE. Root-sum-of-square (RSS) remains the most common approach to combine surface coil array images at each TE prior to the data fitting procedure. Rapid signal decay can r...

2011
Aditya Kumar Pardeep Singh

This comparison paper scrutinizes image compression using Block Truncation Coding. Many algorithms were selected likely the original Block Truncation coding, Absolute Moment Block Truncation Coding, a comparison survey was executed. These above techniques are divided image into non overlapping blocks. They distinguish in the direction of choosing the quantization level in order to remove redund...

Journal: :The Annals of Mathematical Statistics 1949

Journal: :Pacific Journal of Mathematics 2012

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