articles
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The rapid development of the Internet, the emergence of new services related to the placement and
processing of data on the Internet necessitates the implementation of educational programs aimed at
training data protection and personal security on the Internet. Therefore, this article provides an analysis
of methods for assessing the level of safe behavior on the Internet, including Microsoft Computing
Safety Index, Networked Readiness Index and a number of others. The author substantiates the choice
and carries out the practical implementation of the original methodology developed by the Internet
development Fund and the Faculty of psychology of Lomonosov Moscow State University, which allows
to evaluate the four components of digital competence: knowledge, skills, motivation and responsibility
in relation to the four spheres of activity on the Internet: content processing, communication,
consumption, technosphere. According to the results of the study, an educational program is developed
that takes into account the identified features of digital competence of students, namely the
need to improve competence in the components of «Communication» and «Consumption», the need
to increase motivation for learning and responsibility for their actions. The implementation of the educational
program is based on the method of intensive training, focused on the formulation of students
rules of safe behavior on the Internet in relation to all areas under consideration, followed by
the consolidation of the knowledge gained in the development of relevant cases and practical tasks.
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The article presents a theoretical result in the form of a new synthesis algorithm of a control system
for a two-dimensional object whose mathematical model is a system of second-order nonlinear difference
equations. Two types of control systems for such an object are presented for the cases of its functioning
both in deterministic conditions and in stochastic conditions. The theoretical basis of the algorithm
for controlling the synthesis of a two-dimensional discrete stochastic object is the analytical design
method for aggregated regulators. The application of this method for synthesis control of the abovementioned
object was implemented as a two-stage procedure. At the first stage, the structure of the control
system is formed on the basis of predefined target macro variables, the form of which determines the
description of target manifolds. The second stage poses the task of robust control of the object’s output
to a given manifold with a minimum variance for the output macro variable. The paper provides the results
of numerical modeling with quality assessment of transient processes, confirming the consistency
of the received control system of the economic object and positive properties in comparison to classical
control. The algorithm for control system design and the implemented corresponding control algorithm
to the problem solution for stabilizing of the stochastic object can be useful for any nonlinear systems.
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№ 6(78)
28 december 2018 year
Rubric: Models and Methods Authors: Rogulin R., Evdakimova N., Goncharov E., Maximenko V., Nechaev P., Pleshanov D. |
This article contains a model of generalization of three previously known linear programming problems:
The production problem (Classical setting) — the solution is a vector of the number of produced
final products, found with limitations on the number of resources taking into account of maximization
of profit. The task of accounting for time — this task is rather an additional condition in the general
system of restrictions and relates to the objective function (minimization of the total time spent on the
transportation of goods), the transport task — determination of the ways and volume of transportation
of products on the graph (road system). The statement of the problem, which integrates all three of the
above problems into one integrated one, is exactly suited to the case when the task of determining the
volume of production of various types of products is followed by the determination of the transport
routes to each point of consumption (the consumer) so as to minimize, taking into account of capacity
of the graph roads) transportation costs. This task appeared on the timber-processing complex in the
process of production and sale of goods. This paper is devoted to constructing a linear mixed-integer
model, finding a method and selecting an algorithm for determining the optimal solution to the production
and transportation problem. This problem can be attributed to the class of non-trivial combinatorial
problems when making decisions at an enterprise.
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We employ a contemporary set of sentiment analytics methods for the dataset of Russia-related
news texts and compare a variety of sentiment dictionaries as applied to the news texts. In this paper
we evaluate the applicability of the AFINN, NRC, Loughran and McDonald dictionaries to determine
the impact of the sentiment polarity on the stock and foreign exchange markets. The dictionaries are
selected due to their applications in the area of textual analysis and the number of sentiments polarities
classes they cover. The empirical basis of the research is the 2,5 million Russia-related news texts,
acquired via the Thomson Reuters authorized sources for the period from January 2012 to June 2018.
Based on the textual analysis method known as the «bag-of-words» we evaluate the polarity of each
of the news texts with the use of all selected dictionaries. The correlation of oscillating polarities and
the major stock market indicators is determined. We show that the Russia-related news sentiments
demonstrate substantial impact on the stock markets. In addition, the negative news polarities predominantly
affect the markets being a major media factor for the market players. The NRC Emotion
Lexicon dictionary fits best the sentiment analysis of the Russia-related news.
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The competitiveness of a company is influenced by many factors. A person, very often, cannot effectively
take them into account and make a balanced solution. This fact negatively impacts on business.
One way to correct the aforementioned situation is the usage of artificial intelligence, in particular,
Data Mining. Russian companies, unfortunately, rarely use the technology. The purpose of the
paper was to demonstrate the capabilities of Data Mining in terms of improving the company’s competitiveness.
To the effect, a file with depersonalized client information of a real telecommunications
company was used. In addition, the authors analyzed the prognostic abilities of Data Mining methods
to identify the one that best suits for the specified subject area. In this paper, using the Orange analytical
system, six methods were tested: «Decision Tree», kNN, «Random Forest», SVM, «Neural Network»,
and «Association Rules». Each of them was tested in two stages. At the first stage, with the fixed values
of the «Evaluate» widget settings (see Table 3), the prognostic model of the selected Data Mining
method was studied. At the second stage, the values of the «Evaluate» widget settings (see Tables 4
and 5) were changed, and the values of the predictive model settings were fixed (most effective values
of the settings from the previous step was used). An F-measure was used to evaluate the model’s performance.
As a result, it was found that the «Random Forest» and SVM are the most preferred methods.
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№ 1(79)
20 february 2019 year
Rubric: Training technologies Authors: Yumashova S., Lozhkarev A., Yamshchikova А. |
The use of computer simulation technology in the educational process is the key to improving
the quality of education. It affects the relevance of modeling technical systems and processes using
the tools of the game engine Unity 3D. Unity is a professional multiplatform game engine and an integrated
powerful game editor created from the very beginning to facilitate the creation of animations.
This engine is something like a constructor, as there is a great editing environment with a convenient
user interface that allows you to create an animation visually. The visual model is a set of software
tools that allow you to simulate the work of the object under study and the individual elements that
make up it. As such a tool for creating visual models, it is proposed to use the graphical tool Unity,
propose to use the graphical tool Unity, designed to create interactive and multimedia applications.
The task is to simulate the road crossing and operation of the cameras. This article provides visual tools
for developing and visualizing interactive 3D projects in Unity3d in real time, including C# scripts.
Demonstration a specific example of a typical situation in Unity3d using C# programming with their
analysis. The result of the work is the created scene, which displays the details of this section of the
intersection of roads. With the help of this illustration, students develop model thinking and focus their
attention on the phenomenon under study.
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