2020 Issue №4

Currently, a number of diagnostic situations requiring consideration from the position of a council of physicians of the same (rarely) or different specialization is growing. Convening a council is often difficult or it is neces­sary to wait for a long time. Therefore, modeling mechanisms for solving of a diagnostic problems and its and cognitive visualization is relevant. The latter is also due to the fact that the safety of the made decisions depends on the speed of the doctor's response to the emerging problematic diagnostic situa­tion. The paper is dedicated to the research of the convening and group activi­ty of specialists within the council. Results of it would provide the basis of hy­brid functional intellectual systems with cognitive modeling of a diagnostic problem.

One of the most difficult task for an operator is the operational work with an image in intelligent complex dynamic control systems of a directly not per­ceptible object and projecting information from the outside onto this image. In this regard, the development of computer imitation of cognitive formations will lead to an increase in human intelligence in operational work, by supple­menting the operator's natural abilities to process operational and technologi­cal information by software and hardware (mechanisms) that expand human thought processes. This paper presents the results of the work of the first stage of the second year of the research on the topic of cognitive hybrid intelligent systems. Namely, results of the study of the operational and technological con­trol system of the regional electric power system, results of the categorization of the ontological semantics of the objective reality and the mathematical reali­ty of the object of technology operations activities.

The results of single-mirror antenna with a dual-band log-periodic irra­diator geometric parameters optimization and model researches of it’s range properties in MathCAD are presented in this article. The model of the mirror antenna radiation field used by the authors is based on the base of the surface currents method, the method of induced EMFs and theory of electric circuits with distributed parameters. The results of the research showed the adequacy of the constructed model and the compliance of the directional properties of the mirror antenna with the requirements imposed on them.

Research topic: the applicability of an external feature — electret-thermal analysis — to the study of liquid dielectrics, which are exotic types of edible vegetable oils.

The purpose of scientific research: to establish the relationship of the cur­rent response with heating of oil samples with their fatty acid composi­tion.

Description of the research methodology: for the analysis of samples of vegetable oils (pumpkin, walnuts, black cumin), the method of electret-thermal analysis, that is widely used in condensed matter physics, was ap­plied. When this method is implemented, during the heating of samples, a current response to the physicochemical changes occurring in them is rec­orded, which is compared with the fatty acid oils composition.

The main results, conclusions of the research work: based on the exist­ence of a non-zero current response, a hypothesis is put forward that ther­mally stimulated and accompanied by the flow of current destruction of un­stable supramolecular formations — associates of fatty acid triglycerides — occur in the samples. It has been established that the spectrum type of the thermally stimulated current is in obvious accordance with the fact which triglycerides of which specific fatty acids prevail in the composition of a par­ticular oil. A change in the current spectrum in comparison with the char­acteristic spectrum for this oil type can be considered a marker of damage or falsification.

The paper describes an algorithm for integrating digital measuring devic­es with a personal computer as part of a multifunctional instrument complex for using the resources of the Matlab application software package for record­ing and processing received signals. The basic device is a memory oscilloscope manufactured by «Tektronix», which has proven itself in laboratory experi­ments on radio spectroscopy. The proposed procedure for connecting the oscil­loscope to the software package is a sequence of actions that are quite accessi­ble to any user. At the same time, it can significantly increase the efficiency of using digital measuring devices in experimental technology.