MATHEMATICAL MODELLING OF BLOOD FLOW
Author: Joao Oliveria Venture, Khujatov Nurbek Jumaboevich
Abstract:
The paper presents the two-phase model to describe blood flow in large and in small blood vessels. Based on this model the study gives an explanation for long known features (effects) of blood flow in the vessels: dependence of the hematocrit (packed cell volume) on the diameter of the vessel, existence of cell-free plasma layer near the vessel wall, obtuse (as compared with the profile of Poiseuille flow) velocity profile of a blood; dependence of the blood viscosity on the diameter of the vessel. The researcher determines dependences of the blood rate and viscosity on the diameter of a blood vessel.
With the flow of blood in small vessels (less than 200 μm), the rheological properties of the blood depend on the size of the vessel - the apparent viscosity of the blood drops with a decrease in the diameter of the blood vessel. To describe the flow of blood in small vessels, it is necessary to create an equation of state that depends (apart from other parameters) on the diameter of the vessel.
MODEL OF OPTIMIZATION OF TECHNOLOGICAL REGIMES OF OILEXTRACTION PRODUCTION FOR THE MINIMUM COSTS
Author: Abdullayeva G. K.
Abstract:
In the stochastic manufacturing process conditions and classification of end products of oil extraction production by intersecting quality areas, manufacturing costs can be reduced by varying the values for the number of modes and their coordinates. 25 Built in the model optimization mode technology is designed to surround the purposes of (current) planning production of oil extraction enterprise products.
THE MODEL OF OPERATIONAL CONTROL OF THE PRODUCTION PROCESS IN COTTON PROCESSING ENTERPRISE
Author: Firnafas Y.
Abstract:
Mathematical formalization of the test process is reduced to the construction of the static model of operational control of technological progress of the
primary processing of raw cotton, thus it is considered a fixed process parameters and usage of digital technological modes.