in this study, the possibility of producing coal with less than 11% ash from tailings of flotation process was investigated. the effect of six flotation parameters: collector type, collector consumption, frother type, frother consumption, pulp density and mixing rate were studied on a sample from a tailing dam. a software based experimental design approach (dx7) was applied to determine and mod...

Turbulent mixing plays an important role in a variety of applications ranging from astrophysics to combustion and even pollutant dispersion. The Direct Numerical Simulation (DNS) that resolves all scales is not feasible for most engineering since the flow has wide range length time scales, which yields extremely high resolution requirements. Large Eddy Simulations (LES) overcome this limitation...

The strong mixing property for a sequence of random variables is interesting in its own right. It is discussed that under what conditions the strong mixing property holds for linear stochastic processes and in particular ARMA processes. Then an example of Non-Strong mixing Autoregressive Processes is discussed here.

We present a method for estimating transmission matrices that describe the mixing and the probability of infection between age groups. Transmission matrices can be used to estimate age-dependent forces of infection in age-structured, compartmental models for the study of infectious diseases. We have analyzed the social network generated by bipartite graphs for the synthetic city of Portland and...

[1] It is often assumed that ventilation of the atmospheric boundary layer is weak in the absence of fronts, but is this always true? In this paper we investigate the processes responsible for ventilation of the atmospheric boundary layer during a nonfrontal day that occurred on 9 May 2005 using the UK Met Office Unified Model. Pollution sources are represented by the constant emission of a pas...

For a strictly stationary sequence of regularly varying random variables we study functional weak convergence of partial sum processes in the space D[0, 1] with the Skorohod J1 topology. Under the strong mixing condition, we identify necessary and sufficient conditions for such convergence in terms of the corresponding extremal index. We also give conditions under which the regular variation pr...

Assortative mixing feature is an important topological property in complex networks. In this paper, we extend degree-degree mixing feature to non-identical nodes networks. We propose the degree-frequency correlation coefficient to measure the correlations between the degree and the natural frequency of oscillators. We find that the perfect assortative degree-frequency network is quite easy to s...

Historical ship drifts from the tropical Atlantic Ocean are compared with surface currents from a general circulation model forced with monthly mean climatological winds. The model accurately reproduces the spatial structure of the currents and its time dependence, which varies considerably from the eastern side of the basin, where a semiannual harmonic is prominent, to the western side, where ...

We study mixing of two fluids of different viscosity in a microfluidic channel or porous medium. We show that the synergetic action of alternating injection and viscous fingering leads to a dramatic increase in mixing efficiency at high Péclet numbers. Based on observations from high-resolution simulations, we develop a theoretical model of mixing efficiency that combines a hyperbolic mixing mo...

In certain cases, images of different scenes can be mixed to produce an image of a novel scene. For example, an image of a pink sphere can be additively mixed from suitable images of a red and a white sphere. Three ways in which scenes can differ are considered: in the spectral composition of the illuminant and in the spectral and the geometric reflectance of scene objects. Sufficient condition...