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Modeling power definition

When data can be assumed to be approximately multilinear there is little if any benefit in matricizing the data before analysis. Even though the two-way models describe more variation per definition, the increased modeling power does not necessarily provide more predictive models in terms of modeling either the independent or the dependent variables. Even when the data do not approximately follow a multilinear model (e.g. sensory data), the multilinear models can be preferred if the possible bias in having too simple an X-model is counteracted by the smaller amount of overfit. [Pg.288]

DFT has been much less successful for the soft repulsive sphere models. The definitive study of DFT for such potentials is that of Laird and Kroll [186] who considered both the inverse power potentials and the Yukawa potential. They showed that none of the theories existing at that time could describe the fluid to bcc transitions correctly. As yet, there is no satisfactory explanation for the failure of the DFTs considered by Laird and Kroll for soft potentials. However, it appears that some progress with such systems can be made within the context of Rosenfeld s fundamental measures functionals [130]. [Pg.157]

In the next section, I introduce the concept of power, confronting some different definitions of power from different realms of social science. Section 3 surveys economic literature on power, stemming from the view of the standard model to the newest theories developed by the new institutional economics and to power definition and concepts suggested by different strands of social network analysis. Section 4 uses different concepts of power to address some organizational problems in the food system. [Pg.199]

Same definitions as 5-26-M. ILff = effective viscosity from power law model, Pa-s. <3 = surface tension liquid, N/m. [Pg.617]

Establishing the physical and analytical boundaries for a QRA is also a difficult task. Even though you will provide input, the scope definition will largely be made by the QRA project team. Defining the physical boundaries is relatively straightforward, but it does force the QRA team to explicitly identify and account for interfaces that may significantly affect the QRA results. Eor example, analysts often treat a connection to a power supply (e.g., a plug) or a feed source as a physical boundary yet, loss of power or contamination of the feed must be considered in the QRA model. [Pg.27]

The present author was worried about the lack of knowledge concerning the quality of the kinetic models used in the industry. A model is by definition a small, scaled-down imitation of the real thing. (Men should remember tliis when their mothers-in-law call them model husbands.) In the industry all we require from a kinetic model is that it describe the chemical rate adequately by using traditional mathematical forms (Airhenius law, power law expressions and combinations of these) within the limits of its applications. Neither should it rudely violate the known laws of science. [Pg.117]

Other less definite yet important effects such as profile changes due to nonlinear refractive index alteration in spatially nonuniform high power beams must be carefully considered. As example, the use of nonidentical liquids and optical paths prior to and in, say, EFISH cells and the usual quartz calibration cells could cause potentially inaccurate x determinations. Obviously these types of considerations are important when precise experimentation to test fine models of molecular behavior are intended, but have not stood as obstacle to uncovering the important general trends in molecular nonlinearity enhancement. [Pg.47]

Note that Eq. (3) (respectively Eq. (2)) is in fact the definition of the liquid (gas) film thickness dL (dG), which cannot be measured because it does not really exist. The advantage of this model is its simplicity, its teaching power, and its ability to describe the coupling of mass transfer with chemical reactions sufficiently accurately for most practical cases. [Pg.1519]

It should be noted, however, that our application of the new interpretation does not imply that the traditional labour embodied definition of value should be completely abandoned. Foley (2000 30) is open to the possibility that there may be a role for both the new and traditional interpretations of the value of labour power. As Appendix 4 shows, the labour embodied definition of the value of labour power is nested in the input-output model of the circulation of money between departments of production, regardless of how prices are defined. The deviation of prices from values does not modify the constituent role of the labour embodied measure in the interindustry monetary circuit. It is only when a macroeconomic aggregation is developed under price-value deviations, and in the derivation of the scalar Keynesian multiplier, that a switch to the value-form definition is required. [Pg.100]

Despite the broad definition of chemometrics, the most important part of it is the application of multivariate data analysis to chemistry-relevant data. Chemistry deals with compounds, their properties, and their transformations into other compounds. Major tasks of chemists are the analysis of complex mixtures, the synthesis of compounds with desired properties, and the construction and operation of chemical technological plants. However, chemical/physical systems of practical interest are often very complicated and cannot be described sufficiently by theory. Actually, a typical chemometrics approach is not based on first principles—that means scientific laws and mles of nature—but is data driven. Multivariate statistical data analysis is a powerful tool for analyzing and structuring data sets that have been obtained from such systems, and for making empirical mathematical models that are for instance capable to predict the values of important properties not directly measurable (Figure 1.1). [Pg.15]

A model was adopted in which the delocalizing power of the substituent was defined analogously to Fischer s increments (Fischer, 1964) and Arnold s o -scale (Arnold, 1986). Experimental delocalization parameters S"P were calculated according to (10). By definition, 5 is zero for the... [Pg.149]

Computational modeling can be a very powerful tool to understand the structure and dynamics of complex supramolecular assemblies in biological systems. We need to sharpen the definition of the term model somewhat, designating a procedure that allows us to quantitatively predict the physical properties of the system. In that sense, the simple geometrical illustrations in Fig. 1 only qualify if by some means experimentally accessible parameters can be calculated. As an example, a quantitative treatment of DNA bending in the solenoid model would only be possible if beyond the mechanical and charge properties of... [Pg.398]

Several other points perhaps need better definition and several questions await answers. We hope that many of them will emerge from the arguments gathered in the previous sections. Nevertheless, in view of the conclusions so far reached and of the new problems arising out of these results, we feel that all the experimental responses and the attempts to interpret them in the study of conformational properties of organic molecules in general, and of acyl heterocycles in particular, represent a powerful test for the models of electronic structure of molecules and for the behavior they exhibit under different conditions. [Pg.170]


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See also in sourсe #XX -- [ Pg.206 ]




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