نتایج جستجو برای: saft eos

تعداد نتایج: 4163  

Journal: :Journal of Molecular Liquids 2022

• Density and viscosity behavior of CO 2 + pentane or hexane is determined. Measurements were carried out up to 100 MPa temperatures (293.15 393.15) K. The data good correlated using Tammann-Tait VFT models for densities viscosities, respectively. GERG 2008, PC-SAFT CP-PC-SAFT are examined modelling densities. Viscosities compared with REFPROP10 MYS predictions. This work reports new experiment...

2016
Shlomi Bulkowstein Shalom Ben-Shimol Noga Givon-Lavi Rimma Melamed Eilon Shany David Greenberg

BACKGROUND We compared demographic and clinical characteristics of early-onset sepsis (EOS) and community-acquired late onset sepsis (CA-LOS) in infants. METHODS Our medical center is the sole hospital in southern-Israel, enabling incidence calculations. EOS (<7 days) and CA-LOS (7-90 days) episodes recorded between 2007 and 2013 were reviewed. Univariate and multivariate analyses were perfor...

Journal: :The journal of physical chemistry. B 2007
Lino M B Dias Eduardo J M Filipe Clare McCabe Telma Cordeiro Jorge C G Calado

The vapor-liquid equilibrium of binary mixtures of xenon + SF6 has been measured at nine temperatures from 235.34 to 295.79 K and pressures up to 6.5 MPa. The mixture critical line is found to be continuous between the critical points of the pure components, and hence, the system can be classified as type I phase behavior in the scheme of van Konynenburg and Scott. The excess Gibbs free energie...

2015
Giovanni Alfredo Guarneri Daniel Rodrigues Pipa Flávio Neves Junior Lúcia Valéria Ramos de Arruda Marcelo Victor Wüst Zibetti

Ultrasound imaging systems (UIS) are essential tools in nondestructive testing (NDT). In general, the quality of images depends on two factors: system hardware features and image reconstruction algorithms. This paper presents a new image reconstruction algorithm for ultrasonic NDT. The algorithm reconstructs images from A-scan signals acquired by an ultrasonic imaging system with a monostatic t...

2012
J. Brizuela J. Camacho L. Medina J. F. Cruza

This work describes the development of a new 3D ultrasonic imaging method that combines different beamforming techniques (Phased Array -PAand Synthetic Aperture Focusing Technique -SAFT-). The proposed methodology uses a silicone mask along the x-axis to produce a wide beam in the array width direction (y-axis). Then, a coherent-spatial composition of several phased array B-scan images is imple...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده مهندسی شیمی و نفت 1392

در این پایان نامه، کشش بین سطحی سیالات به صورت نظری و با استفاده از نظریه گرادیان، تعیین شده و نتایج با داده¬های تجربی مقایسه شده اند. برای این منظور، معادله حالت¬های ck-saft و spc-saft، برای سیالات حالت خالص و مخلوط به کار برده شده اند. سیالات بررسی شده در حالت خالص، شامل آلکان¬ها (c1، c3، c5، c7، c10)، مبرد¬ها (r-22، r-32،r-125،r-152a، r-134a، r-143a) و سیالات با جمله¬های همبسته متفاوت (بنزن...

2007
Lixin Sun Honggang Zhao

The SAFT-VR equation of state is combined with a semi-continuous thermodynamic approach to model several synthetic and crude oil systems. In our approach, the oil fractions are defined by a continuous distribution that is then represented as discrete pseudo-components using the Gaussian quadrature method. The SAFT-VR parameters for the pseudo-components are obtained from simple linear relations...

2003
Jayant K. Singh David A. Kofke Jeffrey R. Errington

Vapor–liquid interfacial tension of square-well ~SW! fluids is calculated using three different methods viz., molecular dynamics ~MD! with collision-based virial evaluation, Monte Carlo with virial computed by volume perturbation, and Binder’s density-distribution method in conjunction with grand-canonical transition-matrix Monte Carlo ~GC-TMMC!. Three values of the SW attractive well range par...

Journal: :Molecules 2016
Linda Lange Stefan Heisel Gabriele Sadowski

In this work, the solubilities of pharmaceutical cocrystals in solvent/anti-solvent systems were predicted using PC-SAFT in order to increase the efficiency of cocrystal formation processes. Modeling results and experimental data were compared for the cocrystal system nicotinamide/succinic acid (2:1) in the solvent/anti-solvent mixtures ethanol/water, ethanol/acetonitrile and ethanol/ethyl acet...

2013
QIUFENG LI XUEJUAN YANG PAN HUANG YIN LIAO

Because of the need of rapid detection of internal defects and embedded object in concrete structures, a ultrasonic detecting method with linear array transducers is presented here, which is the high-resolution and efficient imaging technique for concrete materials by combining with synthetic aperture focusing technique (SAFT). At first, simulation data of array detection are processed to be am...

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