نتایج جستجو برای: expansion ratio

تعداد نتایج: 637146  

Journal: :Stroke 2013
Javier M Romero H Bart Brouwers Jingjing Lu Josser E Delgado Almandoz Hillary Kelly Jeremy Heit Joshua Goldstein Jonathan Rosand R Gilberto Gonzalez

BACKGROUND AND PURPOSE Intracerebral hemorrhage (ICH) results in high mortality and morbidity for patients. Previous retrospective studies correlated the spot sign score (SSSc) with ICH expansion, mortality, and clinical outcome among ICH survivors. We performed a prospective study to validate the SSSc for the prediction of ICH expansion, mortality, and clinical outcome among survivors. METHO...

2010
Murat Guvendiren Jason A. Burdick Shu Yang

We investigated solvent induced transition of surface instability from wrinkles to creases in poly(2-hydroxyethyl methacrylate) (PHEMA) gels with depth-wise crosslinking gradients. The mode of surface instability and morphology of surface patterns was found to be dependent on the equilibrium linear expansion, which was a function of crosslinker concentration and the solvent–polymer interaction....

2007
M. P. Escudier P. J. Oliveira R. J. Poole

The results are reported of an experimental investigation of turbulent flow through a plane sudden expansion of expansion ratio R=D/d=4 and aspect ratio A= w/h=5.33. It is well known that plane sudden expansions with R greater than 1.5 produce asymmetric flows and this was again seen in this study. The literature for the asymmetric situation (R>1.5) is surprisingly limited and only axial veloci...

2014
Chang Gi Kim

This study investigated the effect of the built-in volume ratio of an expander on the performance of a dual-loop Rankine cycle system for the engine waste heat recovery of a vehicle. Varying vehicle operating conditions can cause a positive displacement expander to operate in both underand over-expansion states. Therefore, analysis of the off-design performance of the expander is very important...

Journal: :journal of operation and automation in power engineering 2014
behnam alizadeh shahram jadid

this paper presents an application of benders decomposition to deal with the complexities in the simultaneous generation expansion planning (gep) and transmission expansion planning (tep). unlike the power system operation fields of study, the power system planning methods are not expected to be fast. however, it is always preferable to speed up computations to provide more analysis options for...

2010
Silvia Gago Dirk Schlatter

In this paper we study various models for web graphs with respect to bounded expansion. All the deterministic models even have constant expansion, whereas the copying model has unbounded expansion. The most interesting case turns out to be the preferential attachment model — which we conjecture to have unbounded expansion, too.

Journal: :Sustainability 2022

Student mobility is one of the most important indicators to reflect institutional internationalization in a sustainable higher education system. issues have been addressed previous studies, and phenomenon was discussed association with related factors persistently. Since development has received much scholarly attention, monitoring student flows adjust international strategies necessary. This s...

2017
Zhiping Zhang Weikang Sun Hongfei Liu Guanhua Xie Xiaobing Chen Xianghua Zeng

Zr2WP2O12/ZrO2 composites were fabricated by solid state reaction with the goal of tailoring the thermal expansion coefficient. XRD, SEM and TMA were used to investigate the composition, microstructure, and thermal expansion behavior of Zr2WP2O12/ZrO2 composites with different mass ratio. Relative densities of all the resulting Zr2WP2O12/ZrO2 samples were also tested by Archimedes' methods. The...

2004
B. Jackson S. Stringari

– We discuss the effects of collisions on the expansion of a degenerate normal Fermi gas, following the sudden removal of the confining trap. Using a Boltzmann equation approach, we calculate the time dependence of the aspect ratio and the entropy increase of the expanding atomic cloud taking into account the collisional effects due to the deformation of the distribution function in momentum sp...

Journal: :The European respiratory journal 2006
P A de Jong F R Long J C Wong P J Merkus H A Tiddens J C Hogg H O Coxson

The aim of the current study was to use computed tomography (CT) to estimate airway wall and lumen, and arterial and parenchyma dimensions in children throughout the growth period, and to provide normative data to study alterations caused by pulmonary disease. Clinical CT scans reported as normal that were performed in children for nonpulmonary and noncardiac reasons were analysed for lung weig...

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