Modeling of parallel operation of distribution transformers with thyristor voltage and powe regulator are considered here. Models are made in Simulink. Structural model of parallel operation of two three-phase transformers is presented. Model allows us to study electromagnetic processes at phase by phase control.
Keywords: three-phase transformer, parallel operation of transformer, simulation, Simulink.
In article results of the previous work of authors of numerical modeling of jointed rocky massifs at tectonic loadings are. Also in article the detailed description of carrying out physical modeling with use of equivalent materials is given. Results of this modeling and their comparison with numerical experiment are yielded.
Keywords: physical modeling, numerical modeling, mathematical modeling, imitating modeling, method of final elements, the intense deformed state
This scientific research presents an analysis of the dynamics social tensions and political attitudes among students of 1 - 2 courses for the period 2013-2014 RSSU. Presents the distribution function of a indicator set, such as a deprivation, involvement in political processes, relation to power structures, the assessment of the political situation, the level of protest. of protest. It revealed a decrease levels of participation in the political process and emotional involvement by 2014. The relation of students to government structures improved slightly, there was a shift from low to average sustainable level. Thus lower level of electoral activity of young people to the middle of 2014 is observed. Received higher assessment of the political situation in Russia as a whole by the end of the study period. The level of latent protest generally low, and continues to fall.
Keywords: a political tension, deprivation, group installation, cognitive component, behavioral component, questionnaire, the descriptive statistics
The experimental temperature dependences of the basic MOSFET parameters (the transconductance parameter and threshold voltage) in a wide temperature range covering both cryogenic temperature and regular temperatures are considered. The methods which acceptable for engineering practice and allow to approximate the experimental temperature dependences of the basic MOSFET parameters by the simple analytical expressions in the form of linear or power functions are presented. The investigated MOSFETs was designed for work as active elements of amplifying devices. Temperature dependences of the basic MOSFET parameters are needed for estimation of the sensitivity, prediction of uptime and optimizing the choice of refrigerant for low-noise amplifiers.
Keywords: MOSFET, transconductance parameter, threshold voltage, temperature dependencies, approximation, cryogenic temperatures
The article discusses the application of the method of delays in electric power networks and the possibility of its further improvement in order to reduce the number of calculations and simplify the hardware implementation.To do this, conducted a study on the impact of the delay signal measurement result. The result of the study is to select the optimal delay time. The model proposed in MatLab Simulink program and a study of measurement error as the frequency of mains voltage.
Keywords: measuring, power, electric network, the method of delays, delay time, optimization, modeling
The article discusses the Pan-Tompkins algorithm to detect QRS complexes in real time, when applied to a PC for analysis of records not in real time and pre-recorded. QRS complexes detection algorithm was published Dzhiapu Pan and J. Willis. Tompkinson in the journal IEEE Transactions on biomedical engineering, vol. BME-32, NO. 3 in March 1985. The algorithm has been designed for use in real time. Pan and Tompkinson developed an algorithm for real-time detection of QRS complexes of ECG signals. Algorithm for QRS complexes reliably recognize, by analyzing the inclination of the complex amplitude and width. Special digital bandpass filter reduces the number of false detections caused by different kinds of interference present in the ECG signal. This filtering allows the use of low detection thresholds, thereby increasing the sensitivity of detection. The algorithm automatically adjusts thresholds and parameters periodically to adapt to such changes ECG QRS morphology and as the heart rate. For standard recording duration 24 hours from the database MIT / BIH arrhythmia database, this algorithm correctly recognized 99.3 percent QRS complexes. However, this time the algorithm is rather outdated, as it was designed for computers that time. With certain modifications and current capabilities, parameters can improve the quality and speed of analysis. A modified version of the algorithm has been developed for use in the client software mobile multifunctional hardware-software complex and long-term cardiac monitoring ergonometrii. Better and more precise analysis of QRS complexes in the signal more accurately assess the state of the cardiovascular system of the person, which is an important factor in the treatment and diagnosis of heart disease in the early stages.
Keywords: ECG, accurate analysis, detection of QRS, algorithm Pan-Tompkinson, cardiovascular system.
This paper, based on the content of the axioms for the randomized algorithm, considers the collection of using correct algorithms at synthesis for solving the problem of probabilistic hidden Markov model. Application of this model allows forming algorithm with its flexibility according to a substantial situation for ensuring structural and functional stability of the program realizing this algorithm. We found that randomization of the algorithm, increasing its flexibility and efficiency, does not improve its risk compared with the corresponding deterministic algorithm. The synthesis of the algorithm based on hidden Markov model implies that the available observed data is used to determine hidden parameters of the most likely sequence of states, determining the synthesized algorithm. At the first strategy step, the "back and forth" algorithm is used to evaluate how well the model matches with the input data of the synthesized algorithm. At the second stage, the given hidden Markov model with the space of hidden states, initial probabilities of presence in state i and probabilities of transition from state i to state j, and basing on the observed states and using the Viterbi algorithm, the Viterbi path is found. At the third strategy stage, the hidden Markov models are corrected by optimizing the parameters of the model using the Baum-Welch algorithm.
Keywords: hidden markov model, "back and forth" algorithm, viterbi algorithm, Baum-Welch algorithm
The analysis of existing methods of warming up the "old" asphalt with regard to its further use. Found that known methods of heat grinding are energy-intensive, which limits their use in industry. A new method of thermal regeneration based inkjet influence of coolant with subsequent classification of the particles.
Keywords: asphalt, grinding, heating, classification, agglomerate, device, analysis, method, jet, coolant, air
The article deals with the optimization of the process of disintegration of rock jaw crusher. The mathematical model that minimizes the costs of the process of crushing the rock.
Keywords: disintegration of rock, mathematical models, optimization
We consider the parallel implementation of a simplified shingles algorithm for the speed-up of text documents comparison on heterogeneous computing system based on multi-core processors and the Many Integrated Core (MIC) accelerators. A step-by-step gradual modification of the original single-threaded program is presented as well as the architecture of distributed software web-service for document comparison. The results of testing of the developed prototype, showing the possibility of reducing the time of comparison of documents up to 12 times using multiple accelerators in the system are presented.
Keywords: shingles algoritm, CRC32, Intel Xeon Phi ™, MIC, OpenMP, Mono, ASP.NET
The solution of the navigation problem on the basis of integration of inertial-satellite navigation systems, complexed with odometer, in the general case - without simplifying assumptions about the object model of its trajectory, etc. The effectiveness of the solution with the loss of satellite signals is illustrated by numerical experiment.
Keywords: tight integration, inertial - satellite navigation systems, odometer, nonlinear Kalman filter, continuous-discrete filtering
The article describes a software complex based on the software system of formation and solving of nonlinear dynamics equations to calculate the stress-strain state of the model by discrete elements. Steps of the method found suitable for acceleration using parallel computing. The results of the testing of a modified software package are presented. A general 2.4 times acceleration of method implementation was achieved.
Keywords: computer modeling, FRUND, parallel computing, differential-algebraic equations, stress-strain state, orthogonal grid, engineering construction, approximation function, sparsed matrix, system of linear algebraic equations
Solution of the problem of navigation on the basis of integration of inertial-satellite navigation systems, complexed with odometer, and the approximation of the trajectory of motion of the object by means of electronic charts (EC) set of great circle paths. Given the discrete nature of satellite measurements of the parameters of motion estimation is carried out by successive application of two non-linear Gaussian filters: continuous - the interval between satellite measurements (including at their failure) and discrete-continuous - when they occur. Thus obtained estimates of the parameters of motion implemented in the great circle path, having a minimum dimension, provide fundamentally accurate snap estimated coordinates to the true path of movement defined by the EC.
Keywords: tight integration, inertial-satellite navigation systems, odometer, e-cards, great circle path, a Gaussian filter
The analysis of group attitudes structure among RGSU’s students in relation to a political order in 2015 is carried out. Presents the distribution function of a indicator set, such as a socio-economic protection, involvement in political processes, relation to power structures, the assessment of the political situation, the level of protest. It revealed a low level of participation in the political process, and the average level of emotional involvement, and as a result are weak electoral and social activities. The assessment of a political situation is the average level, both in the region and in Russia as a whole. The level of latent protest is generally below average. Analysis of the level relative deprivation showed separation group into three subgroups with low, medium and high levels of social tension.
Keywords: a political tension, deprivation, group installation, cognitive component, behavioral component, questionnaire, the descriptive statistics
The final work in the series of four articles devoted to the development of a methodology for a comprehensive study of latent conflicts of students (on the basis of the Karachay-Cherkess University). From empirical measurement, development indicators, characterizing the possibility of conflicts with various parties and identifies their relationship, to the definition of integrative indices of affective and cognitive components. At the final stage, reflected in the present work, on the basis of these components is constructed an index of the overall conflicts. For this purpose, a stochastic psychosemantic model, developed based on the concept of typicality, in the framework of the catastrophe theory. It allows taking into account the measurement uncertainty and instability of the respondents ' opinions. The index of total conflicts is modeled by a random variable. Statistical characteristics of which were determined by Monte Carlo simulation using agent - oriented simulation package AnyLogic. Offered in a series of technique can be used not only to monitor but also to predict the situation and simulate the impact of various adverse factors, or Vice versa, proactive assessment of impacts. The paper also shows the specific results for the investigated sample of students KCR. In particular, it was found that the subgroup of the risk of formation of conflictogenic processes includes 15% of all respondents.
Keywords: latent conflict potential, cognitive and affective indicators, measurement error, random variable, the Langevin equation, typicality, multi-agent simulation, Monte Carlo method, distribution function, and structural stability
Applying of teaching programs in study of theoretical mechanics is considered in this article; the main topics included in the teaching complex and it's structure (consists of three parts) are shown. Work algorithm of teaching program is presented, the block diagram of the algorithm for the "Projection of force on the axis" is shown, the shape of the output rules of theoretical mechanics is given, the output window of test question is presented for example, the main advantages of applying complex of teaching programs and the future prospects of its development are shown
Keywords: theoretical mechanics, complex of teaching programs, testing, static, teaching
In article results of the analysis of process of a disinhibition of the car are stated. Dependences of an integrated indicator of a disinhibition from the construction of parameters of brake system are investigated. Approach to development of a method of modern diagnostics of brake system is developed.
Keywords: diagnosing, car, indicator, braking
Currently, there is a certain quantity of different game level generators. However, most of solutions in this segment have typical disadvantages, such as lack of versatility, specialization on specific game level types, game logic or incompatible output data. Some of these solutions require additional software or special hardware, when some of them are encapsulated in a gaming application without any possibility of interaction with user. These problems could be solved by developing partly-automated universal game level generator that supports certain level of human control. Proposed approach involves partial automation of the process of creating game levels. Designed generator is implemented as a dynamic link library that contains all necessary tools for generating game level. The library is the main part of the software package. This library implements several different methods of generating game levels that include functions for generating basic path, creating static geometric objects and placing interactive game objects. This software package also has specific tool for game level designer that allows declaring and designing pluralities of basic level elements which are used by the generator.
Keywords: game level, game level creation, game level generation, user managed generation, dynamic link library
The paper proposes a model system for managing the process of formation of professional skills of trainees during exercise using a computer simulator. A distinctive feature of the proposed system models is the opportunity for the shortest time to achieve a high degree of quality development and skills by computing the integrated assessment exercise learners based on a number of quality indicators with different physical nature (using fuzzy set theory and the analytic hierarchy process) as well as full control of the dynamics of the development of skills in view of the gradual development of skills with repeated exercises under repeatability conditions (using mathematical models of iterative learning).
Keywords: automated training systems, computer simulator, professional skills, fuzzy sets, iterative learning model, analytic hierarchy process
The paper presents the theoretical and methodological bases of research in the social partnership system of additional vocational education through building dynamic game-theoretic models of interaction.
Keywords: social partnership, additional professional education, game theory, simulation
In this paper we propose a model to automatically obtain a comprehensive assessment of the level of formation of professional skills of operators of industrial-technological system, scientific novelty which, compared with existing, is the ability to relate the quality of some exercises on a computer simulator with different physical nature (time, distance etc.) with coefficients of development, are dimensionless quantities and therefore suitable for further processing. On the basis of the proposed model in the near future plans to implement algorithms, software and information support automated training system operators of industrial and technological processes.
Keywords: automated training systems, computer simulator, professional skills, fuzzy inference algorithm Mamdani, fuzzification, defuzzification
The optimization of multilayered one-dimensional nonlinear structure of Raman amplifier of optical signals consisted of alternate active nonlinear metal layers and passive dielectric has been studied. The amplification of the reflected and passed field energy was calculated for different structure types. The effective replacement of passive layers by active media in the middle and in the end of structure has been demonstrated.
Keywords: raman scattering, amplifier, photonic crystal, nonlinear effect, photonic bandgap
The paper proposes a method of calculating the amount of visual information in an image. The method is based on the model of local analysis in the early vision. We are talking about the information perceived by an observer under certain conditions, not about the information contained in the raster image per se. Simple striate cortex neurons respond to the simple visual features of image, for example, the bright stripes in a dark environment, and the brightness gradients. To evaluate the amount of information in the image, it is possible to take the ratio of the number of activated neurons to the total number of neurons in a model. It is necessary to consider the angular size of the image to calculate the value of the estimate.
Keywords: Simple visual feature, raster image, information, entropy, redundancy, simple striate neuron, Gabor function, computer simulation
In this paper we propose a model, the hallmark of which is the ability to automatically obtain a comprehensive assessment of the level of formation of professional abilities of operators, called a complex coefficient was calculated in the development and completion of learning exercises as a weighted average based on the weights of quality indicators used in this exercise, and the coefficients of development according to indicators of quality. Detail the features of the application of the analytic hierarchy process, which is calculated using the weights needed to calculate the complex factors of development. In the short term plan to implement algorithms, software and information support automated training system in accordance with the proposed model.
Keywords: automated training systems, computer simulator, professional skills, analytic hierarchy process, comprehensive assessment, the coefficient development skills
The article describes the main factors ranking sites by search engines. Using and analysing of these factors by developers of the sites gives to the high positions in results of delivery of search engines. Three groups of factors are specified and examined in the article: internal ranking factors, external ranking factors and behavioral ranking factors. The giving example of search engine ranking pages of Yandex and Google for the developed site consider these factors.
Keywords: the ranking factor, the sorting sites, the search engine optimization, the search engine, site optimization, Internet