Mathematical model of selecting of the optimal structure of MPLS networks

A cost model for selecting the optimal structure of MPLS based networks taking into account their structural reliability is proposed. An MPLS network is represented as a logical graph built over a physical network.     

Informational Modeling of the Behavior of a Teacher in the Learning Process Based on Fuzzy Logic

The purpose of this paper is to develop rules, knowledge, and algorithms that will engender a real shift in most of the educational process on the computer environment. On the basis of artificial neural networks, this work is a mechanism that allows taking into account the subjective opinion of experts without requiring changes in the system. With the help of fuzzy logic, this paper offers an original method of monitoring a student's knowledge by closely mimicking the behavior of the teacher in the student survey, which combines the power and brevity, not previously accessible to automated systems.     

Modeling the Process of Liquid Flow in the System “Formation–Pipeline”

Journal of Engineering Physics and Thermophysics - A model of the process of nonstationary motion of a liquid in the conjugate system “formation–pipeline” has been constructed,...     

Efficiency of recovering energy in thermal power and engineering systems and their elements

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 6, pp. 3–6, June, 1992.     

A kinetic approach to the rheology of inhomogeneous systems with account for the interaction of disperse-phase particles

By measuring the optical characteristics of a flow the rheology of a viscous non-Newtonian fluid — an aqueous solution of hydrolyzed polyacrylonitrile — has been studied. The loss of stability by the system with chaotic fluctuations of transparency has been established. A kinetic model, as well as kinetic equations that describe the flow of heterogeneous systems, have been suggested. It is expected that this approach will be used in calculations in oil-and gas production and filtration of non-Newtonian systems in porous media. __________ Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 79, No. 6, pp. 90–97, November–December, 2006.     

Oil reservoir waterflooding efficiency evaluation method

The effective hydrocarbon field development requires a well-developed waterflooding strategy with surveillance plan for continuous efficiency monitoring. The modified capacitance resistance model (CRM) is proposed to monitor the efficiency of oil field waterflood. The model outcomes give and understanding of flooding response. Forties field data was used to test and present the waterflood performance based on proposed modified CRM model.     

Combined method of regeneration of return water glass mixture (in the form of a discussion)

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 7, pp. 29–30, July, 1990.     

Specific features of the gas-liquid mixture filtration

Summary The problem of an isothermic filtration of a gas-liquid mixture under pressure, exceeding the saturation pressure in a porous medium, is presented in the paper. Experimental results of the influence of the surface effect on the behaviour of the mentioned gas-liquid systems in the pre-critical area are also described here. It is demonstrated that increasing the wetting of the surface of the porous medium capillaries leads to the removal of the flow rate anomaly near the saturation pressure. Models to explain the observed effects occurring during the period of the gas-liquid mixture filtration when the pressure is higher than the saturation pressure have been offered.Notation P Static pressure - P _s Saturation pressure - P ₂,P ₁ Pressures of the inlet and outlet of the column with the porous medium - P _m Average pressure - P Pressure drop - P/l Pressure gradient - Q Flow rate of liquid - Q ₀ Liquid flow rate of Poiseulle-flow or flow rate by Darcy - Q/Q ₀ Relative flow rate of liquid - Q _m Maximum relative flow rate of liquid - Q ₁ Flow rate of the central layer of liquid - q Flow rate of liquid when flow is with slippage - Rate of fluid - ₀ Rate of filtration with slippage - Fluid viscosity - _C Apparent viscosity - l Length of the specimen of the porous medium - F Cross-sectional area of the specimen of the porous medium - m Porosity - K Permeability - R Capillary radius - R _C Average radius of pore channels - D Diameter of the porous medium particles - Gas-liquid mixture density atP - ₀ Gas-liquid mixture density atP _S - ₂, ₁ Density, according to gas-liquid mixture at the inlet and outlet of the porous medium - ₁, ₂ Minimum and maximum of the compressibility coefficient - V Volume of the sample - V Change of the sample volume - Dimensionless thickness of near wall layer - Ratios between the viscosities of the fluid layer in the central and at the walls of the capillary - C Surfactant concentration - C ₀ Nucleus concentration - b Slip coefficient - E _S Work of the heterogeneous formation of the gas phase nucleus - W Work of the homogenous formation of the gas phase nucleus - Contact angle between the liquid and the solid surface - f() Function of the contact angle - k Boltzmanns constant - T Absolute temperature - , , a _i , c _i Constant coefficients