articles
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In this paper, using the Berlekamp-Massey algorithm, the linear complexity of the signals generated
by communication systems was estimated, the modeling of which was carried out in [5]. In addition,
the linear complexity of the communication system with simple signals represented by a sine wave
was evaluated [13]. As a result of the calculations, it was found that of the considered communication
systems, the most linear complexity is possessed by communication systems with chaotic signals (with
the exception of a communication system based on chaotic masking, in which the Rossler attractor is
used as a generator of chaotic signals). Among the considered systems of communication with chaotic
signals the most linear complexity has a communication system based on chaotic modulation. The least
linear complexity has a communication system based on simple signals. Communication systems based
on "classical" noise-like signals have a linear complexity much greater than the communication system
with simple signals, but less than the communication system with chaotic signals. It is established that
communication systems with chaotic signals in general are more preferable for secure communication
systems than communication systems based on "classical" noise-like signals. In general, it should be
noted that in order to increase the security of transmitted information using communication systems
based on noise-like signals, it is necessary either to complicate the structure of the transmitted signal,
making it looks like white noise, or to use a potentially infinite number of sets of different classes
of expanding sequences and their periodic change, subject to certain requirements for expanding
sequences.
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This article discusses the server indexing system based on the FTP protocol. The article describes
a set of functions for indexing files, search engine and database. The authors have shown the possibility
of FTP server indexing, possible problems and the ways of solving them. Despite the evolution of
file storages through the 34 years passed after the creation of FTP protocol this issue remains relevant
and useful because of big amount of data, stored on FTP servers and wide functionality of developed
search system. The search system developed by the project consists of three main parts: indexing system,
database and Web-service. Indexing system is the most important and difficult part of the project,
it indexes various types of servers, which are fundamentally different from each other in the format of
data on files, and avoids link traps and upload indexed data to database. To ensure multi-threaded operation
and efficiency, the indexing system is implemented with Python. Web-service accepts requests
from the end user, makes a request to the database and returns the search result. The user can create a
query specifying the full or partial file name, file type and size. The unique difference of this system is
the storage of the change history of files and servers that can be tracked for each file, directory or server.
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The Aivika simulation framework is represented in this article, where a distributed module implementing
the Time Warp method is considered in detail. It is shown that main discrete event simulation
paradigms including the process-oriented one can be used in the distributed simulation. Also it is
represented how a GPSS-like embedded domain-specific language can be used in simulation. The important
details of the implementation are des
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№ 4(82)
30 august 2019 year
Rubric: Algorithmic efficiency Authors: Bulygina O. V., Emelyanov A., Selyavskiy Y. |
The article discusses some new results obtained in the problem solving process of developing new
tools for assessing the viability of large innovative multiprojects in the metallurgical industry for the
new metal products issue. Accordingly, methods have been created for predicting the performance indicators
of enterprises participat-ing in such multiprojects. The results obtained are important to development
of economic-mathematical and instrumental methods for analyzing the effectiveness of
in-novation in the dynamic environment. A model has been created for the implementation of a large
innovative multiproject as part of the new metal production creation with the ability to carry out this
project stages by several participants. An assessment was made of the various components of the metallurgical
enterprises innovation potential and their external environment using dynamic growing pyramidal
networks and Kalman filtering. A computer actor-simulation model for implementation of
the organizational stage of production in the metallurgical complex has been developed. An organizational-
computational procedure and an information system for decision-making support to managing
a large innovative multiproject in the metallurgy and approving technical tasks for its subprojects. An
organizational-computational procedure and an information system for decision-making support to
managing a large innovative multiproject in the metallurgy and approving technical tasks for its subprojects.
The created economic and mathematical tools were used to develop recommendations for
the implementation of an innovative project carried out at the stage of semi-finished production for
future metal-made products.
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№ 5(83)
25 october 2019 year
Rubric: Business analytics Authors: Kravchenko T., Druzhaev A., Gomenyuk K., Lipatnikov A. |
Business analysis is fundamental to organizations seeking to maximize business value. The body
of knowledge on business analysis includes six areas of knowledge: planning and monitoring business
analysis; identifying requirements and working with stakeholders; requirements life cycle management;
strategic analysis; requirements analysis and design solutions; evaluation of the quality of
the decision. The goal of business analysis planning is to determine an effective approach to achieve
the objectives of the project. Agile business analysis applies flexible thinking to fundamental knowledge,
competencies and business analysis methods. The purpose of the study is to develop an approach
to business analysis planning in a specific company for making an innovative decision. The tasks are
formulated that are solved in planning a business analysis. The forecast and adaptive approaches to
business analysis, their features and differences are compared. Company N, which is considered in
the work, plans to engage in the leasing of standardized online store site management software to the
mainstream consumer and other web development services. It is assumed that the rented website will
be integrated with the business process automation system and an ERP tool such as warehouse management
with the ability to integrate with the 1C system and translation of the website into 5 languages.
Rental of software will be based on the SaaS model (“software as a service”). The services
provided by сompany N allow other companies to avoid the risks associated with investing in their
own website. Prior to the start of business analysis planning, the potential segment of the clientele is
determined with the need to rent the website, the advantages and disadvantages of the service for the
buyer. In this paper, only the following main tasks of business analysis planning are considered: identification
of stakeholders; planning ways to implement business analyst communications with stakeholders;
planning an approach to managing requirements using Agile methodology; business process
modeling. The process of managing requirements by Agile methodology is considered in more detail:
the development of a fully functional version of the product has been modeled.
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New trends in human resource management (HRM) require information systems to be
compliant with fast–changing business requirements and tasks. The article presents the results
of HRM tasks analysis through the prism of using the capabilities of information technologies to
support actual HRM tools. New applications of such a tool as a competency model are discussed.
The proposed decision–making support algorithm for planning activities in the field of personnel
development, based on the use of a company’s competency model, is described.
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