Materials Literature
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The method of attack the research problems of the multiextremal dependencies in order to find several extremes simultaneously is described. It concerns both the problems of determining several equisignificant global extrema, and the problems of allocation, apart with the global, of the most significant local extrema.…
Non-stationary signals of biogenic character (cardiogram, eleсtroencephalogram, etc.) are considered. Analysis of signals with the use of wavelet-transform and Prony method - which unlike classical Fourier method make an improved spectral evaluation - is applied.
The squeezing process by the screw press is considered, design defects are analyzed, and the direction of the screw efficiency promotion is chosen. The operating device has been tested. Made working element tests for working capacity. The received results confirm the designed construction efficiency.
A mathematical model presenting transport processes and assimilation of harmful substances (soot and benzapyrene) in the breaking-in areas is specified. The designed model allows to forecast air quality in the working areas, to define hazardous cancerogenic zones in the deleterious gases concentration fields.
Alginate-chitosan (ALG-CHI) microspheres obtained by polyelectrolyte complexation are pH-sensitive, biocompatible and adhesive, and are excellent candidates for the delivery of drugs, proteins and peptides in the human body. A wide variety of methods for the production of these polymeric complexes has been provided. T…
Aphrons fluids are being studied for application in oil well drilling operation. These fluids consist, basically, of polymer and surfactant, which act as thickening agent and microbubbles producer, respectively. The specific function of aphrons is to act in the filtrate reduction of oil reservoirs presenting low press…
Generalized structural and conceptual hydrokinetic analytical models, and technique for developing a mathematical model of multiengined hydromechanical systems are presented.
An original improvement of modern information models of conventional engine is proposed. Within the model all internal as well as external processes related to engine are integrated to a general system. Additional procedure to simulate nitric oxide kinetics in a combustion chamber is elaborated. The problem of exhaust…
The concept of enterprise economic management is presented. Basic set of tools - in the form of 'chain' - is described. The role of activity-based costing as an engineering marketing instrument in the economic management system is determined.
The given work states an estimation to two updatings of genetic algorithm which give decisions very close to optimum, for polynom time. Both these of algorithm, lead, finally, to the decision of a two-instrument minimax problem, however on various computing ways.
The use of slow release fertilizer has become a new trend to save fertilizer consumption and to minimize environmental pollution. Due to its polymeric cationic, biodegradable, bioabsorbable, and bactericidal characteristics, chitosan (CS) nanoparticle is an interesting material for use in controlled release systems. H…
The influence of cyclone devices design parameters on their aerodynamic properties and efficiency is considered. The comparative experimental studies of cylindrical and conical cyclones are presented. A mathematical model of aerodynamic processes in the cyclone apparatus of various designs which is refined by experime…
Braking modes with application of hydroshock-absorbers for MECHANISMS OF INCREASED OPERATION SPEED are analyzed. Improvement tasks of hydroshock-absorbers for process equipment are formulated.
The results of current trends and tendencies of business tourism development in Rostov region are presented, the role of business tourism for tourist industry system performance is defined on the world, national and regional levels.
Mechanism of the regional control of the industrial enterprises business processes ecologization under transformation conditions. Methods of environmental economics developed by both Russian and foreign scientists are examined.
Experimental optimization of convergence rate of the genetic approximation algorithm accomplished with the application of the specialized scientific design of experiments software tools is described.
The creation of 'open marketing system' which can help a modern and active enterprise to respond dynamically to market changes is suggested. Open Source taken as a basis is a new marketing mix to supply and implement an innovative product or service.
Algorithmic and program implementation of modeling of the technological objects distributed systems is considered. The technology of hierarchic class structure development agreed upon multiple inheritance in C++ is offered for software authoring. Research of the given software tool when modeling standard simulation mo…
Optimal correlation between polymer and metal-ceramic areas in the friction zone is established for the developed construction of polymer-powdered bearings with a combined working surface that can hold the grease contained in the metal matrix pores.
Poly(vinyl alcohol) (PVA) hydrogels have been used for numerous biomedical and pharmaceutical applications, as a consequence of their non-toxic, non-carcinogenic and bioadhesive properties. In this communication the effect of different factors, such as type of electrolyte, ionic strength, temperature (ranging from 20…