[Prediction and analysis of pulse frequency in cosmonauts by the method of extrapolation modelling in the class of differential equations]. / Prignozirovanie i analiz chastoty pul'sa kosmonavtov metodom ékstrapoliatsionnogo modelirovaniia v klasse differentsial'nykh uravenii

The paper discusses the use of the methods of the theory of automatic control and identification for predicting and analyzing the cardiovascular function of crewmembers in long-duration space missions. On the basis of the inflight heart rate data models characterizing the cardiovascular function can be built. The models have the form of linear differential equations of the second order and are used to calculate values of the heart rate. With respect to the parameters of the equations, the characteristics of the quality and specificity of the cardiovascular regulation inflight are determined. The paper describes the practical application of the above methods to predict and analyze the cardiovascular function of the crewmembers of the Soviet Salyut-1 and Salyut-4 and US Skylab-3 space stations.

[Theroretical aspects of the problem of prognosing the state of the human body during space flight]. / Teoreticheskie aspekty problemy prognozirovaniia sostaoianiia organizma cheloveka vo vremia kosmicheskogo poleta

The paper presents general principles underlying the construction of mathematical systems used to predict the human health status in space flight. It describes methods of prediction based on the concepts of homeostasis and general adaptation syndrome. The paper discusses applications of methods of statistic approximation and expertise estimates to predict changes in different parameters of the Salyut crewmembers. It gives an evaluation of the accuracy with which variations in the heart rate of the Salyut crewmembers were predicted using a linear model and expertise estimates.