ISSN 0236-235X (P)
ISSN 2311-2735 (E)

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Higher Attestation Commission (VAK) - К1 quartile
Russian Science Citation Index (RSCI)

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Publication date:
16 June 2024

Articles of journal № 3 at 2012 year.

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41. Peculiarities of working with documents in information management systems [№3 за 2012 год]
Authors: Вичугова А.А., Вичугов В.Н., Дмитриева Е.А.
Visitors: 11935
The article describes aspects of document management in modern multiplayer communication systems that allow you to automate structured electronic information storage and management. Models of these information systems are considered. Analysis of the notion of «electronic document» is performed, including metadata and inner content, as well as the major differences between product data management systems (PDM) and electronic document management systems (ECM) concerning objects of «document» type. Possible states of a document's life cycle in the information system are listed. There are considered features of Workflow management methodology on the example of work with documents. There is a fragment from the developed model of project information management system as an example of the technological data management in instrument manufacture. There are compared document management features on the example of PDM-system Enovia SmarTeam of IBM and Dassault Systems production and domestic ECM-system DIRECTUM, developed by a homonymous Russian company.

42. Combined method of text tonality automatic identifying [№3 за 2012 год]
Author: Котельников Е.В.
Visitors: 12202
The article is devoted to the problem of automatic text sentiment analysis. Sentiment analysis is used for many important applications, for example, the research for a commercial organization of the relations of customers to its production, or the development of a recommendatory system for the customers of specified groups of goods or services. The new method of text sentiment analysis which combines the results of work of Support Vector Machines (SVM) and Keywords method is suggested in the article. The SVM is a well-known classification method which shows good results on text analysis. The Keywords method is based on the counting of weights of features which the text contains. Words and word combinations, the importance of which is evaluated on the base of Relevance Frequency (RF), are used as features. The combined method contains two phases – training and recognition. On the first phase SVM-classifier and Keywords-classifier are trained on the labeled collection of texts. On the second phase the results of recognition by both classifiers for a new text are combined and the final decision is formed; confidence levels of both classifiers are taken into account. Each of the used methods (SVM, Keyword, combined methods) has its set of parameters. The selection of optimal values of parameters is accomplished with the help of cross-validation. The effectiveness of the combined method is proved experimentally on the text collections of seminar ROMIP-2011. The metrics of precision, recall, accuracy and F1 measure are used for the assessment. F1 measure of the suggested method is equal to 79 %, what is two per cent more than the best result achieved on the seminar ROMIP-2011.

43. Capability of Matlab package related to distant computation using numerical approach for the problem solution [№3 за 2012 год]
Author: Нгуен Зуи Тхаи
Visitors: 10955
The Web-application is designed on Matlab, Web Server (MWS) and distant computation of various math problems that expands capabilities of the previous numerical approach for laboratory-based practical. This laboratory-based practical represents implementation of numerical technique collection on Matlab provided for cal-culations of functions with given accuracy; non-linear equation solution; solution of simultaneous linear algebraic equations; interpolation of tabulated functions using polynom; approximation of a function; solution of differential equations; numerical integration and numerical optimization of functions. Large library of standard MWS functions used in the technology, can create applications, where Matlab uses World Wide Web to send data to Matlab and display results in a Web-browser. MWS depends on transfer data TCP/IP protocol and it links client and MATLAB. The application works at server and user interacts with it through Web-browser and the user does not need Matlab. Therefore, MWS is also an interact communication service of MatLab with the Web-server Apache. MWS has some advantages. When a network user works with Matlab package, there is no need to install resource-intensive software on local computers, because all computations are made by server. Preparation of the Web-application to work in the net is similar to design of local Matlab application and it includes additional step: design of the Web-interface, which means creation of Web-pages on HTML language. Implementation of the Web-application facilitates teaches’ work, it improves effectiveness of the software in case of distant education.

44. Increase of storage coefficient of computing complex efficiency when using virtualization [№3 за 2012 год]
Author: Тетюшев А.В.
Visitors: 10739
The article gives a mathematical description of the effect of increased storage coefficient of computing system efficiency using virtualization tools if certain conditions are performed. These conditions are determined by the efficiency win of the virtual system compared to the physical system at the stage of data processing. It is the efficiency win of the virtual system (service) for certain computational tasks that can be used as a weighting factor that determines the reliability of the whole computing complex. To prove theoretical research has been made an experiment, which included the local area network to the physical server and several workstations. On the physical server a virtual server was raised. During the experiment, the servers reset so that the virtual system exceeded the physical one in the data processing phase. Measuring the efficiency of servers was performed using software agents Ziff-Davis «NetBench». The result of the experiment demonstrated the feasibility of the conditions under which the efficiency of the virtual system can exceed the physical one in the data processing phase. In this case the total reliability of the system is increased without additional funds. The value of this research is that it is possible to develop highly reliable computing systems based on the virtual servers (services), comparable in reliability to existing, but with a much lower cost.

45. Design-automation system of wireless network IEEE 802.11 [№3 за 2012 год]
Authors: Zhukov V.G., Parotkin N.Yu.
Visitors: 10022
The article considers automation design issue related to wireless local computational IEEE 801.11 networks. The problem involves selection of optimal ratio of active network equipment parameters, its settings and location in order to provide maximum access rate for a client to the network in the building and minimize the signal outside the building. Last requirement concerns not only information security but meeting requirement of the Russian law. The article describes legislative and regulatory acts that regulate this field; it also describes the use of the wireless equipment IEEE 801.11. Transmission signal model was improved and formalized to solve the problem of automation design of the network. Based on input parameters that depend on equipment, it makes computation of the signal power in any place of the room, taking into consideration obstacles reducing the power. This helps to make integral estimation of the network type according to assigned deviation of speed inside the room and signal power outside the room. Ideal network shall be characterized by maximum value and, therefore, optimization shall be required. It is recommended to use differential adaptive genetic algorithm. The article describes software system that implements model and algorithm, and it also provides easy graphic interface to work with them. The measurement result revealed that calculated signal power differed from the real power less than for fifteen per cent.

46. Tablet computer for outfit of the industrial enterprise workplaces [№3 за 2012 год]
Author: Матвеев А.И.
Visitors: 8926
There are two variants of the development of a portable computer engine operated on the basis of the motherboard as a desktop computer or as a portable computer (laptop). In consequence of the devices’ characteristics analysis, which is made on the data obtained during assembly, the choice is made in favor of the computer engine, working on the basis of the motherboard of a desktop computer. Created Tablet Computer is a mobile and is powered by a rechargeable battery. It causes to changes in all motherboard power system and eliminates to use the standard power unit. Power supply of the created Tablet Computer is based on the PWM generator. This method is easy to implement because of the large variety of MAXIM's chips and ISL (possibility of the programmatic control of the voltage level), the long hardware component base as of PWM-generating chips as well as several field transistors in a single package. The matrix (display) of the portable computer (laptop) is also used; the image is transmitted to the matrix through the DVI-output. The solution of a number of technical problems ensures compliance with the required functional characteristics and cost performance, which allows you to equip the required number of concerned industrial enterprise workplaces.

47. Planning system for production with concurrent product assembly [№3 за 2012 год]
Authors: Сидоренко А.М., Khobotov E.N., Мелкишев В.Н.
Visitors: 10152
The article offers ideas and algorithm of planning and scheduling of works at the enterprise level. There is considered the computational algorithm scheme to make schedules for components processing and units assembly in mechanical workshops of an enterprise, as well as the structure of the planning and scheduling system for enterprises, created using the proposed algorithm. To verify functionality of the proposed algorithms and software prototype of the system there was held a series of numerical experiments showed their sufficiently high effectiveness. Creation of planning and scheduling systems for enterprises on the basis of such algorithms can significantly improve the efficiency of production.

48. Computing and modeling of fuzzy Cauchy problem using virtual perspective method [№3 за 2012 год]
Author: Myshev A.V.
Visitors: 7982
The work describes computing and modeling of fuzzy Cauchy problem using virtual perspective method with limitations, closedness and indeterminancy. It was investigated dynamic evolution of space objects within predicative model of bounded problem N – mass body using methods of standard computational mathematics and virtual perspective method. Obtain results showed that virtual perspective method was more effective and advanced in comparison with traditional simulation models. Computational modeling of this problem using virtual perspective method it is described on information modeling language. In this case the problem is defined and set as a discrete dynamic information system, specified at the set of nodes of coordinate and perspective arrays. Copmputing systems present character strings and its compositions as a information prototype of computing environment and its elements. Modeling in the virtual environment is characterized by following specifics. First, computation process creates dynamics of related image links (RIL) in modeling technologies. Second, information interaction mode and relations of the virtual objects in the model environment in the form of RIL conditions and real conditions of simulated problem, is reflected in coordinate nodes. This array is a geometry pattern of active memory of the computation environment. It was used two types of discrete sampling of the formal evolution operators for the modeled problem; they were used for RIL construction that corresponds to dynamics equation of the Cauchy problem modeling. Two patterns for RIL construction were shown in computing modeling of the fuzzy Cauchy problem. First model was constructed using Runge-Kutta techniques, and the second one was constructed using Adams techniques. Currently, in computing modeling technologies these methods were studied and examined best of all. For the fuzzy problems, related image links according to any variable of the evolution operator were considered as set of projections of the local information dynamic system in the basic array nodes.

49. Program based traffic generator of the virtual lab resource users [№3 за 2012 год]
Authors: Жевнерчук Д.В., Николаев А.В.
Visitors: 11835
In design process of cloud calculations it becomes necessary to model query stream. Query models provide estimation of server hardware resources for the maintenance of client systems under operation or peak load. The work describes software and hardware for the study of processes happening in cloud environment of simulation modeling. The system is implemented on .NET Framework 2.0 platform. It was designed with MS Visual Studio 2008, GPSS World, MySQL 5. The work provides functional model of this system, ER model. The model implements preparation of the model pattern and generation of the final code. Series experiments was made in order to set up traffic generation subsystem; this was done in university laboratory of simulation modeling using GPSS World, the access to this system was provided with Cloud Computing technology. Time metering was performed with GPSS shell, time meter 1.0, which maintains user’s log. Special attention was paid to interaction of a user with the server. Using obtained consistent patterns they built empiric GPSS functions, which describe user’s interaction with the system. The work provides taxonomy of interaction modes with simulation models; based on experiments, it defines basic types of client queries; the work shows users’ interaction models with simulation model environment; the work offers an architecture of model environment for network traffic. Obtained models can be used for estimation of the server hardware resource; this helps to take into account peak load and idle time. Traffic generators that use empiric models can be used for the study of load algorithms of distributed environment for simulation modeling.

50. Automation design of tools using metal extrusion technology modeling [№3 за 2012 год]
Authors: Агапитова О.Ю., Бывальцев С.В., Zalazinsky A.G.
Visitors: 13463
Present day production systemы involve growing number of chipless shaping processes for low moldable and difficult-to-form metals and alloys. The most promising process to perform works with such materials is hydraulic-mechanical extrusion. Hydraulic-mechanical extrusion process of difficult-to-form metals is studied with automation design system. MATLAB is integrated with solid state modeling package SolidWorks and DEFORM 2D (3D) system. The process modeling was performed; there were calculated basic power consumption features; lasting quality was tested and assembly drawings were produced together with accessories for hydraulic-mechanical extrusion process. Practical application of this software solution was illustrated using model example of extrusion of difficult-to-form aluminum alloy. The model showed how important is the use of active force of friction that reduce extrusion forces.

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