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Mixed random, definition

Note that the form of the projection tensor P depends on the form chosen for the hard components of Z v Specifically, values of the mixed soft-hard components of P, , which are not specified by the definition of a generalized projection tensor given in Section VIII, are determined in this context by the values chosen for the mixed components of Z v, which specify correlations between hard and soft components of the random forces that are not specified by Eq. (2.295) for Z v... [Pg.137]

In either interpretation of the Langevin equation, the form of the required pseudoforce depends on the values of the mixed components of Zpy, and thus on the statistical properties of the hard components of the random forces. The definition of a pseudoforce given here is a generalization of the metric force found by both Fixman [9] and Hinch [10]. An apparent discrepancy between the results of Fixman, who considered the case of unprojected random forces, and those of Hinch, who was able to reproducd Fixman s expression for the pseudoforce only in the case of projected random forces, is traced here to an error in Fixman s use of differential geometry. [Pg.151]

Mixed-layer illite-montmorillonite is by far the most abundant (in the vicinity 90%) mixed-layer clay. The two layers occur in all possible proportions from 9 1 to 1 9. Many of those with a 9 1 or even 8 2 ratio are called illites or glauconites (according to Hower, 1961, all glauconites have some interlayered montmorillonite) and those which have ratios of 1 9 and 2 8 are usually called montmorillonite. This practice is not desirable and js definitely misleading. Other random mixed-layer clays are chlorite-montmorillonite, biotite-vermiculite, chlorite-vermiculite, illite-chlorite-montmorillonite, talc-saponite, and serpentine-chlorite. Most commonly one of the layers is the expanded type and the other is non-expanded. [Pg.4]

The layers may be regularly or randomly interstratified. The latter are by far the more common and are probably the second most abundant clay mineral species, following illite (which in most cases is a mixed-layer clay). More regularly interstratified clay minerals have a definite periodicity and some are given specific mineral names. The randomly interstratified clay minerals are described in terms of the type and proportion of the two or more types of layers. Many of them exhibit some degree of regular interlayering. [Pg.107]

The implications of the disparity between empirical and nominal significance levels of the likelihood ratio test in mixed effects modeling and simulation are clear however, definitive solutions or corrections are not. While the significance of random effects is not generally the subject of interest in a simulation, the bias in hkelihood ratio test-determined p value for fixed effects could be very influential on trial simulation findings. Thus, simulation exercises should provide for determination of empirical p values to avoid faulty conclusions about power and sample size. [Pg.317]

As described above, the /3-carotene molecules are randomly oriented in the SC film, but the above discussion suggests that the short-range order similar to that in of the single crystal exists in the SC film. Therefore, we can now conclude definitely that the SC film is an amorphous film, and this conclusion supports the assumption by Babaev and Al perovich (1973). As for the LB film, the optical absorption spectrum measured on normal irradiation with light polarized parallel to the x-axis ofthe substrate showed exactly the same spectral pattern with that parallel to they-axis, although the intensifies of these spectra were apparently different. This shows that there is only one transition moment in the mixed LB film. Saito et al. (1991 a,b) reported the optical absorption spectra of various molecular aggregates in the... [Pg.354]

The fundamental approaches to definition of turbulent flows macro-kinetics and macro-mixing processes are considered in [136-139]. Special attention was focused on micro-mixing models in the context of method based on equation for density of random variables probabilities distribution. Advantage of this method is that we can calculate average rate of chemical reaction if know the corresponding density of concentration and temperature possibility distribution. [Pg.18]

As an example, the joint analysis of IR and Raman spectra provided evidence of the partial ordering of cations in a Fe-Cr corundum-type mixed sesquioxides, which are used industrially as high temperature water-gas shift catalysts, but are also active in olefin oxidative dehydrogenation. X-ray diffraction (XRD) patterns of these solids indicate the conmdum-type structure without any superstructure. This implies that iron and chromium ions are randomly distributed. IR and Raman spectra instead definitely show that cations are at least partially ordered in layers such as in the ilmenite-type superstructure. Similarly, XRD analysis shows a cubic (non-ferroelectric) structure of nanometric BaTi03, while vibrational spectroscopies reveal microscopic asymmetry of this structure. Similarly, IR spectroscopy allowed the determination of the state of vanadium in solid solution in Ti02 anatase catalysts, and the presence of Ti" + in the silicalite framework of TSl catalysts, " used for the selective oxidation of phenol and the ammoximation of cyclohexanone with hydrogen peroxide. [Pg.450]

The well-known mean-field incompressible Flory-Huggins theory of polymer mixtures assumes random mixing of polymer repeat units. However, it has been demonstrated that the radial distribution functions gay(r) of polymer melts are sensitive to the details of the polymer architecture on short length scales. Hence, one expects that in polymer mixtures the radial distribution functions will likewise depend on the intramolecular structure of the components, and that the packing will not be random. Since by definition the heat of mixing is zero for an athermal blend, Flory-Huggins theory predicts athermal mixtures are ideal solutions that exhibit complete miscibility. [Pg.42]

Point 7 has very special properties. It occurs at random close-packing density and provides a definition of it. Point / is an isostatic point, where the number of particle contacts equals the number of force balance equations to describe them. As a result, it is a purely geometrical point the properties of the state at point / are independent of potential. Also, point / appears to be a zero-temperature mixed phase transition, with a discontinuity in the number of contacts, characteristic of first-order phase transitions, and diverging length scales, characteristic of second-order phase transitions. [Pg.478]


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See also in sourсe #XX -- [ Pg.4 ]




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