Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

MARS model

The %HIA, on a scale between 0 and 100%, for the same dataset was modeled by Deconinck et al. with multivariate adaptive regression splines (MARS) and a derived method two-step MARS (TMARS) [38]. Among other Dragon descriptors, the TMARS model included the Tig E-state topological parameter [25], and MARS included the maximal E-state negative variation. The average prediction error, which is 15.4% for MARS and 20.03% for TMARS, shows that the MARS model is more robust in modeling %H1A. [Pg.98]

There are significant differences in the 142Nd and e182W values obtained for the different types of Martian meteorites (Fig. 9.15). These variations indicate that the meteorites were derived from distinct mantle reservoirs that were established early in the history of Mars. Modeling based on s l42Nd and e182W indicates that differentiation of the silicate mantle could have taken place contemporaneously with core formation or could have been... [Pg.334]

The compressed mean densities and calculated moments of inertia for the three Mars models are compared in Table 5. The models are all in reasonable agreement with measured values, although the Sanloup et al. (1999) model has the most variance. [Pg.604]

The Cahn analyses already performed for early surface enrichment observations [167,170] have shown that the yielded relation of the surface energy derivative (—dfs/dc]))s vs (]>, cannot be described by the linear form suggested by simple arguments presented above. While it can be argued that the more sophisticated enthalpy-based models (e.g., [185]) might eventually account for these discrepancies, the relation (—dfs/dc]))s has been interpreted with the Cohen and Muthuku-mar model [183] instead. This model considers entropic effects due to the restriction of the configuration of polymers in the vicinity of an external interface (surface) and finds the additional entropic contribution to the bare surface free energy fss to be equal to... [Pg.49]

The authors record their appreciation of funding over many years for the basic analytical Raman spectroscopic studies of terrestrial extremophiles and Mars models from the European Space Agency and UK organisations (EPSRC, NERC and PPARC/STFC) which have enabled the preliminary work to be carried out to establish the viability of the Raman technique for incorporation into extraterrestrial life-detection instrumentation and for the opportunity to take novel analytical chemical science to the last frontier . Professor Edwards is especially grateful for... [Pg.26]

The configrtration described above has also been the starting point for mar modelling studies (Brasser, 2006). In these models, the (iynamics of the air flow rmdemeath the garment is usitally highly simphfied, neglecting temporal and... [Pg.239]

Climate dataset generation The climate dataset for simulation comprises of a synthetic wind speed, significant wave height and wave period time series. These are generated using a Multivariate Auto-Regressive (MAR) model, shown in Equation 1, normalised by the mean of the data p where is the simulated wind speed at time-step t, n is the number of variables, is a variable state vector, is a matrix of the MAR model coefficients and is a noise vector with mean zero and covariance matrix of the data, order p (Box and Jenkins, 1970). [Pg.1179]

The Experimental Breeder Reactor (EBR-11) development activities in the United States in the 1980s included studies of natural circulation in this machine (GUlette et al., 1980 Planchon et al., 1985 Singer et al., 1980). Ha et al. (2010) validated the MARS models and code with EBR-11 test data. The IAEA (2013) conducted a blind benchmark exercise using data from the PHENIX sodium-cooled reactor. [Pg.497]

Wright, K., and D. Embrey. Using the MARS Model for Getting at the Causes of SPADS. Rail Professional, 2000,6-10. [Pg.209]

K. K. Boon, "A Flexible Mathematical Model for Analy2ing Industrial P. F. Furnaces," M.S. thesis. University of Newcasde, AustraUa, Sept. 1978. R. H. Essenhigh, "A New AppHcation of Perfectly Stirred Reactor (P.S.R.) Theory to Design of Combustion Chambers," TechnicalEeport FS67-1 (u), Peimsylvania State University, Dept, of Euel Science, University Park, Pa., Mar. 1967. [Pg.148]

M. Dente and co-workers, "TLE Fouling Model," paper presented atMJOE SpringNationalMeetings Orlando, Fla., Mar. 18—22,1990. [Pg.448]

In a mixture of / -hexane and benzene (29), the deep catalytic oxidation rates of benzene and / -hexane in the binary mixture are lower than when these compounds are singly present. The kinetics of the individual compounds can be adequately represented by the Mars-VanKrevelen mechanism. This model needs refinements to predict the kinetics for the mixture. [Pg.505]

Load and Extract - converts information to/from the generic output found in the Models and Results Database (MAR-D) file format to/from the SAPHIRE database file. [Pg.141]

Frost, R. W. (1987). Grazing control of phytoplankton stock in the open subarctic Pacific ocean a model assessing the role of mesozooplankton, particularly the large calanoid copepods Neocalanus spp. Mar. Ecol. Prog. Ser. 39, 49-68. [Pg.275]

Here, the equation for the crack growth rate Aa/AN is defined in terms of the maximum energy release rate Tmax. the power-law exponent F R), and the point at which the crack growth rate data converge. The power-law exponent F R) for the Mars-Fatemi model is of the form... [Pg.679]

Mars, W.V. et al.. Fatigue life analysis of an exhaust mount, in Constitutive Models for Rubber IV, Austrell, K., Ed., Swets Zeiflinger, The Netherlands, 2005, 23. [Pg.682]

Mars, W.V. and Fatemi, A., A phenomenological model for the effect of R ratio on fatigue of strain crystallizing rubbers. Rubber Chem. Tech., 76, 1241, 2003. [Pg.683]

Dumesic et al. proposed a model involving six steps based on the general Mars-van Krevelen mechanism for oxidations ... [Pg.398]

A. A. Allen and D. H. Dale. Dispersant mission planner A computerized model for the application of chemical dispersants on oil spills. In Proceedings Volume, volume 1, pages 393-414. 18th Environ Can Arctic Mar Oilspill Program Tech Seminar (Edmonton, Canada, 6/14-6/16), 1995. [Pg.348]

The miniaturized Mossbauer instruments have proven as part of the NASA Mars Exploration Rover 2003 mission that Mossbauer spectroscopy is a powerful tool for planetary exploration, including our planet Earth. For the advanced model of MIMOS II, the new detector technologies and electronic components increase sensitivity and performance significantly. In combination with the high-energy resolution of the SDD, it will be possible to perform XRF analysis in parallel to Mossbauer spectroscopy. In addition to the Fe-mineralogy, information on the sample s elemental composition will be obtained. [Pg.464]

Spencer DW, Bacon MP, Brewer PG (1981) Models of the distribution of " b in a section across the North Equatorial Atlantic Ocean. J Mar Res 39(1) 119-137 Staubwasser M, Henderson GM, Berkman PA, Hall BL (in press) Ba, Ra, Th and U in marine mollusc shells and the potential of Ra/Ba dating of Holocene marine carbonate shells. Geochim Cosmochim... [Pg.528]

As mentioned in Chapter 4, although this is a dynamic experiment where data are collected over time, we consider it as a simple algebraic equation model with two unknown parameters. The data were given for two different conditions (i) with 0.75 g and (ii) with 1.30 g of methanol as solvent. An initial guess of k =1.0 and k2=0.01 was used. The method converged in six and seven iterations respectively without the need for Marquardt s modification. Actually, if Mar-quardt s modification is used, the algorithm slows down somewhat. The estimated parameters are given in Table 16.1 In addition, the model-calculated values are... [Pg.285]


See other pages where MARS model is mentioned: [Pg.42]    [Pg.42]    [Pg.303]    [Pg.114]    [Pg.266]    [Pg.42]    [Pg.42]    [Pg.303]    [Pg.114]    [Pg.266]    [Pg.351]    [Pg.226]    [Pg.413]    [Pg.275]    [Pg.71]    [Pg.679]    [Pg.679]    [Pg.679]    [Pg.682]    [Pg.551]    [Pg.186]    [Pg.200]    [Pg.357]    [Pg.490]    [Pg.492]    [Pg.528]    [Pg.576]    [Pg.602]    [Pg.293]   
See also in sourсe #XX -- [ Pg.303 ]




SEARCH



Marlies

Marring

Mars

Mars-van Krevelen models

Mars—Fatemi model

© 2024 chempedia.info