We investigate, whether the alleged failure of standard photoion-ization codes of the Diffuse Ionized Gas (DIG) is simply caused by geometrical effects and the insufficient treatment of the radiative transfer. Standard pho-toionization models are applicable only to homogeneous and spherical symmetric nebulae with central ionizing stars, whereas the geometry of disk galaxies requires a 3D distri...

Flotation is an important part of coal preparation, and the flotation column is widely applied as efficient flotation equipment. This process is complex and affected by many factors, with the froth depth and reagent dosage being two of the most important and frequently manipulated variables. This paper proposes a new method of switching and optimizing control for the coal flotation process. A h...

The shell map is a very simple representation of the structure of foams, combining the geometrical (random tiling) and dynamical (loss of information from an arbitrary cell out) aspects of disorder. We will illustrate it and give several examples, including a few arising from discussions in Cargese. This chapter is written by following the main lines of two previously published papers [1, 2]. I...

Froth feature extraction plays a significant role in the monitoring and control of flotation process. Image-based soft sensors have received great deal interest process due to their low-cost non-intrusive properties. This study proposes data-driven sensor models based on froth images predict key performance indicators The ability multiple linear regression (MLR), backpropagation neural network ...

This paper will discuss the use of CFD in foam and froth modelling. The physics of froths is introduced and the methodology of combining the models for each phase into a complete description is reviewed. The utility of the CFD model is illustrated in two ways: First the equations are solved explicitly, giving a clear interpretation of process variables and their importance. Second, an example o...

A 25-year-old woman was diagnosed with a ruptured ectopic pregnancy. During laparoscopic surgery, the patient was in the Trendelenberg position (20° degrees). Massive froth in the endotracheal tube was observed at the end of surgery. A portable chest x-ray, checked at the end of the operation, showed diffuse haziness in both upper lung fields. After one hour of aggressive treatment with drugs a...

It is widely accepted that the implementation of model-based predictive controllers (MPC) ensures optimal operation if an accurate model process available. In case froth flotation, modelling for control purposes a challenging task due to inherent instabilities. Most models have only focused on pulp phase rather than phase, which usually oversimplified or even neglected. Despite fact stability c...

Flotation is one of the most used methods to upgrade natural graphite resources. However, efficiency usually decreased due entrainment undesirable fine gangue minerals. In this work, impact different factors such as particle size, pulp density, and flotation reagent on mica quartz in a flake was studied. The single mineral results showed increased when reducing size minerals increasing density....