and without addition of 1-5% KF, NaF, L1F, A1F and NaOH. Graphs of the resulting data are presented. It Is concluded that these additives increase Al + H.O ignltibility and decrease critical diameter, that NaF and KF have a greater effect on combustion rate than the others and that the Improved ignition and combuFtlon result from the action of boiling water solutions of NaF and KF in destruction of the oxide films. A sample of water, gelated with 3% sodium salt of carboxymethylcellulose (CMC), was thoroughly mixed with aluminum powder (mean aluminum particle size, 1 p, was determined in a PSKh-2 instrument), the quantity of which corresponded to the stoichlometric composition Al:H-O=50:50. In introduction of the additive, a sample of fluoride was mixed with aluminum powder beforehand. The slightly soluble Li and Al fluorides had particle sizes of less than 50 p. The soft mixture was rubbed through a 160 p mesh screen with a rubber stopper, to obtain small granules, a sample of which was placed in a small glass beaker and compressed manually to a density of 1.0-1.1 g/cnr (K . ■ 0.5-0.6). packThe charge was ignited with a nichrome spiral, heated by an electric current, and sometimes with an intermediate charge, for which a mixture usually was used which was close to the one being studied in composition and igniting easily under the test conditions. Introduction of 5% KC1 into the mixture, not only does not decrease, but even somewhat increases (from 32 to 37 mm) the critical diameter; the Al+H 0 mixture with KC1 burns very slowly and irregularly.
The problem of one-type uncertainty is solved when cardiovascular system parameters in hypertensive patients undergoing physiotherapy aren’t differentiated by stochastics, but these differences are clearly revealed by the methods of neurocomputing and calculation of parameters of quasi-attractors. Simultaneously, the solution of system synthesis problem is possible, i.e. identification of more important diagnostic characters xi from the whole set of state vector of cardiovascular system x(t) in hypertensive patients. Efficiency of physiotherapy is estimated at two stages of course of treatment: in the initial state (initial physiotherapy) and after the termination of course of treatment. The dynamics of motion of quasi-attractors in phase space of states in hypertensive patients is shown. Thus, the problem of elimination of one-type uncertainty in studying the effi-ciency of curative measures is solved.
This article presents the methods of analysis of the dynamics of bioelectrical activity of the flexor muscles of the little finger of his right hand as a reaction to the static force in compression dynamometer, manifested in changes of the quasi-attractors parameters. The main research methods were deterministicstochastic methods and methods of the chaos theory and self-organization to describe complex biological systems. The authors present a comparative analysis of calculating the parameters of the obtained results, in particular, in the framework of the chaos theory and self-organization - the calculations of the phase plane and their areas; in the framework of the deterministic-stochastic approach - the calculation of the Shannon entropy. Calculations are aimed at assessing the level of randomness of the recorded signal. Analysis of the recorded signal and the evaluation of the level of randomness in a signal of bioelectrical activity of muscles showed that an increase in the static load quasi-attractors bioelectric muscle activity increases dramatically. The degree of change was estimated by calculating the parameters of quasi-attractors according to the chaos theory and self-organization. The changes of state of the system in the direction of increasing the degree of variability in the bioelectric activity of the extensor muscles of the little finger are demonstrated. The high efficiency of application of the chaos theory and self-organization in the assessment of the neuromuscular human system is showed. The obtained results allow to determining the level of the ability of performing the specified operations under the influence of static loads.
A clinical medicine usually uses the amplitude-frequency characteristics of recorded biopotentials. The paper presents still chaotic dynamics, which takes place for the autocorrelation function A(t) and statistic function of distribution fix). It is proposed two new approaches for estimation of parameters of electroencephalograms. The first is based on the construction of the matrix of pairwise comparisons of recorded samples of brain potentials in subjects in different physiological (mental) states: with photostimulation and without it. The second method is based on calculating the parameters of quasi-attractors, which are built on the plane in the coordinates x1=U(t) - a function that changes due to registration of biopotential in current point and x2=dx1/dt - rate of change of x1. The quasi-attractors in this two-dimensional phase space are quantitatively different options for patients (epilepsy) and healthy subjects. It is possible to construct a three-compartmental model quasi-attractor in the phase space of states, which is also discussed. It was demonstrated the stochastic of function fix) for normal and pathological patients. It was proved the nonfictions of entropy parameter for the EEG modeling.
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