نتایج جستجو برای: empirical correlations

تعداد نتایج: 315978  

Journal: :The Journal of analytical psychology 2013
Harald Atmanspacher Wolfgang Fach

We present a typology of mind-matter correlations embedded in a dual-aspect monist framework as proposed by Pauli and Jung. They conjectured a picture in which the mental and the material arise as two complementary aspects of one underlying psychophysically neutral reality to which they cannot be reduced and to which direct empirical access is impossible. This picture suggests structural, persi...

2001
Andrew Ang Joseph Chen

Correlations between U.S. stocks and the aggregate U.S. market are much greater for downside moves, especially for extreme downside moves, than for upside moves. We develop a new statistic for measuring, comparing, and testing asymmetries in conditional correlations. Conditional on the downside, correlations in the data differ from the conditional correlations implied by a normal distribution b...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2007
Megan E Frary Christopher A Schuh

We explore the percolation threshold shift as short-range correlations are introduced and systematically varied in binary composites. Two complementary representations of the correlations are developed in terms of the distribution of phase bonds or, alternatively, using a set of appropriate short-range order parameters. In either case, systematic exploration of the correlation space reveals a b...

2010
Lahouari Ghouti Saeed Al-Bukhitan

Pressure-Volume-Temperature (PVT) properties are very important in the reservoir engineering computations. There are many approaches for predicting various PVT properties based on empirical correlations and statistical regression models. Last decade, researchers utilized neural networks to develop more accurate PVT correlations. These achievements of neural networks open the door to data mining...

2013
Baruch Barzel Albert-László Barabási

Predictions of physical and functional links between cellular components are often based on correlations between experimental measurements, such as gene expression. However, correlations are affected by both direct and indirect paths, confounding our ability to identify true pairwise interactions. Here we exploit the fundamental properties of dynamical correlations in networks to develop a meth...

Journal: :Bulletin of environmental contamination and toxicology 2009
Chia-Pin Chio Man-Ting Cheng Yu-Chi Lin Chung-Min Liao

The main objective of this study was to develop parsimonious empirical models for predicting the mass and number concentrations of ultrafine particulate (UFP, aerodynamic diameter < 0.1 or 0.18 microm) in the atmospheric environment. We found strong correlations existed between the mass/number concentration of UFP and the mass concentration of PM(2.5) (aerodynamic diameter < 2.5 microm) by fitt...

Journal: :international journal of occupational hygiene 0
ali karimi occupational health department, school of public health and nutrition, shiraz university of medical sciences, shiraz, iran and occupational health eng. department, school of public health, tehran university of medical sciences, tehran, iran. farideh golbabaei occupational health eng. department, school of public health, tehran university of medical sciences, tehran, iran. mohammadreza mehrnia biotechnology group, school of chemical engineering, university college of engineering, university of tehran, tehran, iran. kazem mohammad epidemiology and biostatistics department, school of public health, tehran university of medical sciences, tehran, iran. masoud neghab occupational health department, school of public health and nutrition, shiraz university of medical sciences, shiraz, iran. ahmad nikpey occupational health department, school of public health, qazvin university of medical sciences, qazvin, iran.

a laboratory stirred tank bioreactor with six single and dual-impeller configurations was tested to obtain the optimum operating conditions for future biological processes. six impeller combinations consisting of three basic impeller types, namely rushton turbine (rt), pitched 4blade (p4b) and pitched 2blade (p2b) downward flow were investigated in 1.77 l bioreactor working volume. power consum...

Journal: :gas processing 0
hossein kaydani department of chemical engineering, faculty of engineering, shahid bahonar university of kerman, kerman, iran ali mohebbi department of chemical engineering, faculty of engineering, shahid bahonar university of kerman, kerman, iran mohammad hassan saffaripour department of mechanical engineering, faculty of engineering, shahid bahonar university of kerman, kerman, iran

gas compressibility factor (z-factor) is an important parameter widely applied in petroleum and chemical engineering. experimental measurements, equations of state (eoss) and empirical correlations are the most common sources in z-factor calculations. however, these methods have serious limitations such as being time-consuming as well as those from a computational point of view, like instabilit...

Journal: :gas processing 0
hamidreza yousefi department of petroleum engineering, amirkabir university of technology, iran ebrahim shamohammadi department of petroleum engineering, amirkabir university of technology, iran ehsan khamehchi department of petroleum engineering, amirkabir university of technology, iran

gas hydrates are a costly problem when they plug oil and gas pipelines. the best way to determine the hft and pressure is to measure these conditions experimentally for every gas system. since this is not practical in terms of time and money, correlations are the other alternative tools. there are a small number of correlations for specific gravity method to predict the hydrate formation. as th...

2014
Long Huang Vikrant Aute Reinhard Radermacher Long HUANG Vikrant AUTE Reinhard RADERMACHER

Numerical simulation is extensively used in heat exchanger design and performance evaluation. While evaluating potential working fluids, pure fluids and fluid mixtures with different component combinations and fractions are compared based on simulation results. Two of the challenges while conducting such studies are the uncertainties of refrigerant properties and the applicability of empirical ...

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