was the spreading coefficient, whereγoandγwwere the surface tension of the hydrocarbon oil and the aqueous solution respectively,γo/wwas the interfacial tension of the aqueous solution against hydrocarbon oil,
It was found that individual spreading coefficients, as calculated from these surface energy parameters by the geometric mean equation, can be combined to one single parameter, called combined spreading coefficient S C . The latter is defined by the geometric mean of the polymer spreading coefficient...
Eliminating \(u_1,u_2\) and \(v_1\) from the first fixed points, we find a cubic equation for the toxic fixed point (\(v_2^\textrm{T}\not =0\)) given by $$\begin{aligned} c_0+c_1 v_2+c_2 v_2^2+c_3 v_2^3=0 \end{aligned}$$ with coefficient values given in ...
This is expressed as a spreading parameter, S=σo-σs (which is distinct from the spreading coefficient for a drop placed on an immiscible subphase) [5]. For S > 0, the deposited surfactant creates a surface tension gradient that drives Marangoni spreading outward from the deposition site....
(See the Method section). According to the definition of Kendall’s tau coefficient, −1 ≤ τ ≤ 1. In the most ideal case whereτ = 1, for each pair of two nodesiandj, ifiis ranked higher thanjby the method, the spreading originated fromiwill cover more targets than...
In the presence of azimuthal anisotropy above the reflector, the azimuthal variation of the geometrical‐spreading factor is often comparable to that of the reflection coefficient. Application of the algorithm to wide‐azimuth 3D data collected at Weyburn field (Canada) shows that the geometrical ...
Determining the optimal coefficient of the spatially periodic Fisher–KPP equation that minimizes the spreading speedKPP equationTraveling waveMinimal speedSpreading speedThis paper is concerned with the spatially periodic Fisher–KPP equation u_t=(d(x)u_x)_x+(r(x)-u)u u_t=(d(x)u_x)_x+(...
Testing on full-wavefield synthetic data generated by the reflectivity method for layered VTI media confirms that MASC accurately reconstructs the plane-wave conversion coefficient from conventional-spread PS data. Errors in the estimated conversion coefficient, which become noticeable at moderate and ...
(d) 0.7 0.6 Degree K−core Betweenness RLP 0.5 0.4 0.3 0.2 0.04 0.08 0.12 0.16 0.2 0.24 0.28 0.32 0.36 λ Figure 4. Kendall's tau rank correlation coefficient τ between the rankings obtained from different methods and the true spreading ability ρ under different infection probabilities ...
where ξA(A) is the damping coefficient determining the dissipative force, kB is the Boltzmann constant, and the random function η is zero-mean unit-variance Gaussian noise. The random term in Eq. (3) is a mathematical ansatz designed to satisfy the fluctuation-dissipation theorem36 and it ...