Intelligent scheduling processes and controlling workload in computing systems

Methods and algorithms of adaptive scheduling processes and workload control in computing systems are considered.     

Motion of and mass transfer into a liquid droplet in the swirling flow of the geothermal medium

Based on the set of equations of the motion of and mass transfer into a single liquid droplet in a gas flow, a model was proposed that describes the behavior of the dispersed phase of the condensate of the geothermal heat-transfer medium in a cyclone apparatus. The motion of and the mass transfer into droplets in the swirling flow were studied in relation to the inhomogeneous flow pattern, the growth of droplets in the supersaturated medium, and their deformation and breakup. An analytical formula for the collecting power of a cyclone was derived, and recommendations for optimizing the apparatus parameters were made.     

Effect of the Products of Plasma-Chemical Transformations on the Properties of a Plasma and Its Dynamic Behavior

A glow-discharge plasma bounded by a chemically reactive surface is studied. It is shown that the investigation of the properties of such systems must take into account heterogeneous reactions and chemical feedback. A study is undertaken to explore the dynamics of attaining the steady-state values of the discharge current and the plasma glow intensity in a case where there is gas desorption from the boundary surface. A formal model of the process is proposed that takes into account the accumulation of negative ions in the bulk of the positive column of the discharge. This model enables one to qualitatively explain the experimentally observed dynamic features of a plasma.     

Interaction between Copper(II) Oxide and Aqueous Ammonia in the Presence of Ethylenediaminetetraacetic Acid

The interaction of copper(II) oxide with aqueous ammonia containing ethylenediaminetetraacetic acid (H₄L) is analyzed in terms of formal heterogeneous kinetics and the fractal dimension of the dissolving space. It is shown experimentally that, in the presence of H₄L, the dissolution rate of CuO grows with increasing ammonia concentration. At a fixed ammonia concentration, the dissolution rate of CuO passes through a maximum at an H₄L concentration of 8 × 10^–3mol/l. Two mechanisms of dissolution are suggested, namely, an adsorption and a redox mechanism. The adsorption mechanism involves four intermediate species and implies that the dissolution rate is a fractional rational function of the EDTA concentration. The redox mechanism takes into account the oxide/electrolyte interfacial potential. The role of the CuOHL^3–ion is elucidated, and the kinetic parameters of dissolution are derived.     

Taking into account the nonlinear properties of low-temperature plasma in the design of a plasma chemical reactor

An approach to the design of plasma chemical reactors is suggested. The concept of the plasma chemical reactor efficiency is introduced. A correlation between the formation rate of active species and the modification rate of the polymer is established, within the linear approximation, for the stable uniform steady state of plasma. Experiments have demonstrated that, under certain conditions of the interaction between lowpressure plasma and a polymer, the evolution of plasma properties and polymer modification occur in a complicated manner. Models are suggested that take into account the effect of gaseous reaction products on plasma properties as well as the modification rate. Reported at the Conf. “Liquid-Phase Systems and Nonlinear Processes in Chemistry and Chemical Technology,” Ivanovo, 1999.     

Exchange forms of binder-free granulated zeolites A and X: Synthesis and properties

Samples of crystalline aluminosilicates, the granules of which are intergrowths of zeolite A and X crystals with various degrees of exchange of Na⁺ cations for K⁺, Li⁺, H⁺, Mg²⁺, Ca²⁺, and La³⁺ in them, have been synthesized. The influence of the chemical nature and concentration of the exchange cation on the phase composition and the characteristics of the pore structure of the zeolite granules has been studied. The equilibrium adsorption capacities for H₂O vapor and CO₂ of binder-free granulated zeolites A and X in the Na, K, Li, H, Ca, Mg, and La-forms have been determined, and their adsorption activities in natural gas drying and removal of H₂S and CO₂ impurities in the dynamic mode at 20–25°C and atmosphere pressure have been examined. The relationships between the amount of the adsorbate and the type and concentration of exchange cations in the binder-free granulated zeolites A and X have been found.