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The results of the test of numerical methods for solving systems of differential equations describing the system with a complex and chaotic dynamics are discussed. Discusses the results of numerical solution of differential equations based on microwave oscillator equivalent circuit in various dynamic modes. The quantitative evaluation of the actual, global and the mean square error of the numerical...
This paper exploits Duffing equation and discusses some numerical methods to solve it. Numerical calculation's errors of the amplitude and the period of free oscillations of a large time interval of codes TR, BDF, and RADAU5 are computed. Publications describe a plurality of stiff test problems. The highly oscillating problems is known much less. Duffing equation can serve as test concurrently stiff...
Bronchial asthma is a chronical lung disease, involving people of all age groups. Thus, the problem of development and practical realization of new diagnostic methods that can be used for people of all age groups and especially for children is becoming actual. In this paper the practical realization of the device for non-invasive diagnosis of bronchial asthma based on investigation of characteristics...
This article dedicates to the dynamic analysis model of implementation technological capability in the industrial sector. The dynamic analysis model represents in the form of a matrix with three main indicators: the level of capacity utilization, the level and quality of technological capabilities. The development of main directions of increasing technological capability in the industry provides at...
This article describes the management methods for increasing the industry technological capabilities, which includes instruments for determining the level and quality of technological capabilities. Tools are aimed to obtain an objective assessment of the actual level of technological capabilities and its growth factors, in particular it allows to estimate the accumulated (dynamic capabilities), and...
In this paper the methods of switching of a deterministic self-oscillating microwave system into chaotic mode are discussed. Comparative research of different methods of the microwave oscillator chaotization is done by exposure of the dynamical system to an external harmonic signal and introducing of an inertial closed loop. Microwave oscillator based on the avalanche transit time diode is chosen...
In this paper the method of bronchial asthma diagnostics based on analysis of microwave band electromagnetic radiation propagation through the patient chest is described. The suggested method allows to realize innocuous non-invasive diagnostics of respirator system diseases among patients of all ages. It also allows to monitor the patient's condition and the disease progression during the whole period...
In this article the results of testing of numerical methods of solution of differential equations describing the systems with chaotic dynamics in MATLAB are discussed. The results of evaluation of the actual error, the global error and root-mean-square error of the numerical solution of the test differential equation system are discussed. The results of evaluation of the main radio technical parameters...
In this paper the investigation on the special aspects of usage of broadband chaotic signals in the systems of precise positioning and radiolocation is done. The results of the numerical experiment on the investigation of the influence of the productivity of the analog-digital converter (ADC) and additive white noise in the radio channel on the performance and working efficiency of the system are...
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