regression equation

The values of the highest heat of combustion for the dry ashless state of combustion of 35 samples of vegetable raw materials and 35 charcoal were determined. The need for calculating indicators of their technical and elemental analysis was established. Mathematical and graphical relationships between the actual and estimated values of the highest heat of combustion of plant raw materials for the production of biogas and charcoal were developed. A statistical analysis of the dependence data was performed.

Today, all the more significant share in the network of highways is occupied by roads with Portland cement concrete pavements. Materials stabilized with Portland cement are increasingly used under rigid pavements, therefore the problem of correct thickness of the basis is of a great importance. Soil cement and gravel-cement bases have considerable dispersion, which leads to a significant increase in the bearing capacity of concrete pavement.

The article present the empirical mathematical model of receiving oxidized oil bitumen modified by polymeric petroleum resin with fluorine-containing functional groups. The given model allows to predict oxidized oil bitumen performance (penetration, ductility, softening temperature) without any additional experiment while changing certain process managing factors. Запропонована емпірична математична модель одержання окиснених нафтових бітумів модифікованих нафтополімерною смолою з флуорвмісними функціональними групами (НПСФ).