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Методические указания к лабораторной работе по дисциплине Электромеханические устройства и системы «Исследование разомкнутого асинхронного электропривода с тиристорным регулятором напряжения с использованием ПЭВМ
Method development of intelligent systems used when implementing the digital motor control in the mode electrodynamic braking subsystem control the speed of the fan that cools the induction motor mechatronic system. Modeling working capacity of a fuzzy controler performed in MatLab and Simulink. The results confirming the possibility to operate of variable frequency drive without overheating the windings.
Key words: induction motor, braking, intelligent systems.
Executive functions (EF) are a set of higher order cognitive processes that are engaged in a goal directed behaviour. It has been suggested that these functions work differently depending on the type of stimuli (non-affective or affective). Although there are many studies where EF measures have been used for affective or non-affective stimuli, the obtained results do not provide the opportunity to directly compare the data from both measures. To address the problem, the present study aimed at presenting a new battery of cognitive tasks working with non-affective and affective stimuli. Thus, the n-back, Stroop and letter-number tasks were used to assess three core EF, namely updating, inhibition and shifting. New affective versions of the classical n-back, Stroop and letter-number tasks were created as well. Eighty-four participants completed a neutral version followed by the affective version of each task. The results showed a significant positive correlation between the neutral and affective versions in updating and shifting, but not inhibition. There were no significant differences in performance on the neutral and affective versions of updating, cost of inhibition and shift cost. More experiments should be conducted to further broaden the applicability of this novel approach in the assessment of EF in emotion-cognition interactions.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.