Software & Systems

Articles of journal № 2 at 2016 year.

Order result by: Public date | Title | Authors

21. Bank clients’ solvency forecasting based on machine learning methods and Markov chains [№2 за 2016 год]
Authors: Shunina Yu.S., Klyachkin, V.N.
Visitors: 10090
Customer financing is one of the banking priorities. The greater part of a banking net profit is formed due to income from credit financing. However, the commitment to profitability of these operations is always related to various types of risks, which can lead to losses. In order to prevent the losses the article proposes the system for decision-making support of credit financing, starting from granting of credit to the subsequent repayment of current loan payments. When making a decision about granting a loan the system forecasts the creditworthiness of a potential borrower using aggregated classifiers. These classifiers are the results of using several independent machine learning methods that are united by a mean value, as well as by a voting procedure. The input data are client’s records specified in the application for a loan. During the repayments of the current loan the system analyzes the dynamics of an individual borrower's repayment taking into account credit terms, information about a borrower and his credit history. The system then predicts changes in the borrower’s solvency for the next month. The article proposes using Markov chains of 1st and 2nd order, as well as machine learning methods as models. Moreover, the system provides a preliminary analysis and input data processing including non-numeric data coding, continuous data sampling, selection of the most informative features, as well as the recovery of missing data of credit history. The article includes the example showing the effectiveness of the proposed methods and algorithms.

22. Object-oriented technologies in the method of aircraft body automated design [№2 за 2016 год]
Authors: Bykova I.S., Pripadchev A.D.
Visitors: 8562
The article states and proves the automated design method for a long-range aircraft body using the developed software. The method is based on the algorithm developed using object-oriented programming for developing a software tool that allows determining fuselage characteristics at the preliminary design stage (geometric and constructive, mass, mode, aerodynamic, strength, ergonomic). It also helps to create an opportunity to update exhisting aircrafts and design a family of new aircrafts depending on the customer requirements (from geometric and constructive to ergonomic, i.e. positioning passengers in the cabin of the aircraft). The software tool allows performing iteration calculations of these characteristics and creates a report with obtained results. Then it creates a 3D model of the designed aircraft body using OpenGL (Open Graphics Library) and allows exporting it to the 3D modeling system KOMPAS 3D for further imitation and physical mdeling. The software tool is written in the integrated development environment Microsoft Visual Studio 2010 using the high-level object-oriented programming language C#. The method includes the implementation of information (databank), applied programming and algorithmical software.

23. Software of information technology for solving conflict situations in multi-agent environment [№2 за 2016 год]
Authors: Semenov N.A., Mutovkina N.Yu., Klyushin A.Yu.
Visitors: 8647
The agents’ behavior in a dynamically changing multi-agent environment (ME) depends on both external factors and personal characteristics, agents’ qualities. The external factors include interests, preferences, opinions and beliefs of the environment, “fashion”, the possibility of realization of their own desires and needs, etc. The main personal characteristic of the agent is its psycho-behavioral type, which is influenced by external factors. The agent can provoke a conflict in ME under an adverse influence of external factors along with the negative type. It is possible to control a psycho-behavioral agent using a certain combination of influences. This is a unique combination for each type of agent. It depends on the potential strategic behavior of an agent in interaction with other agents. The reduction of deviant agent to a compromise type allows resolving a conflict in ME. The article describes the main ways of avoiding a conflict, a mathematical model of matching representations of the agents and the algorithm for solving a conflict in the ME. The presented information technology allows predicting the agent’s behavioral strategy in the system in conflict and developing a control scheme of the type of the agent. The proposed technology is based on a mathematical apparatus of the game theory, fuzzy logic, the theory of active systems, the mathematical theory of values, interests and judgments. This technology has become the basis for development of an expert system for ME conflict resolution. The best way of developing such a system is the use of so -called “shells” and special software systems, e.g., EXSYS or G2.

24. The software of technological process of soldering spacecrafts’ waveguides [№2 за 2016 год]
Authors: Tynchenko V.S., Bocharov А.N., Laptenok V.D., Seregin Yu.N., Zlobin S.K.
Visitors: 9834
The paper solves the problem of automated control of soldering space vehicles waveguides using induction heating. The authors analyze the peculiarities of the induction soldering process and identifie a necessity of information-control system automation. The developed automated system controls a product heating process by varying the power of the ind uctor on the basis of information about the soldering zone temperature, and stabilizing temperatures in a narrow range above the solder melting point but below the waveguide melting point. This allows automating the soldering process, improving the quality of waveguides and eliminating burn-throughs. The software product is a Windows-based application that works in Windows XP/7/8/8.1/10. It is developed in C++ language in the programming system Borland C++ Builder 6.0 using the object-oriented approach. The article shows a block diagram of a software system consisting of five modules and describes the main algorithm of its work. There is also a description of the waveguide automated soldering system operation that explains basic functions and limitations of the system. The developed software product allows setting measurement equipment, setting and changing soldering parameters, as well as looking through temperature graphs recorded by the system. Furthermore, it is possible to monitor and edit process database. The system has an advanced human-machine interface and does not require additional skills from users. Moreover, it offers flexible scalability features. There article presents the results of experimental studies that show high quality of soldering process control and system applicability to automation tasks.

25. A software suite for simulating drugs dissolution kinetics [№2 за 2016 год]
Authors: Ivanov S.I., Tiptsova I.A., Matasov A.V., Sinitsa E.A., Gordienko M.G., Menshutina N.V.
Visitors: 9521
Dissolution in the pharmaceutical industry is an essential process at a development stage of new original drugs. It is also important for selection of generic compositions. In order to reduce time and cost for carrying out multiple experiments of dissolution of different substance compositions the authors have developed a software suite for modeling drugs dissolution kinetics. The software suite is created using C# in Microsoft Visual Studio. The basis of software calculation module is a model of a dissolution process based on cellular automata with changing sizes of cells. There is also a modified algorithm developed in order to increase calculation performance. It allows reducing the time of calculation by 1,5 times compared to the traditional algorithm of a cellular automaton model. To test the adequacy of the developed software complex the authors compared experimental data with calculated by the example of dissolution of various drugs. The article presents calculated data and visualization of the software operation on example of dissolution of granules that are distributed inclusions of the system “labrasol-ibuprofen” in a mixture of soluble substances (maltodextrin and gum Arabic).

26. Simulator programs for temperature fields in flat form products [№2 за 2016 год]
Author: Margolis B.I.
Visitors: 10826
The article considers a model of a temperature field in the flat shape product at asymmetric convecti ve-radiant heat transfer of product surfaces to the environment and protecting surfaces (heating elements) of production equipment. The paper presents equations for calculating product temperature distribution using numerical finite-difference methods. There is a calculation example of convective-radiant cooling of a glass plate. The article shows that the calculation results are in a good agreement with published sources. It also states possible solutions for the problem in Matlab. The standard function pdepe in MatLab has become a basis for development of a program that allows simulating a product temperature field according to specified thermal and physical characteristics of a material (thermal conductivity, temperature conductivity) and convectiveradiant heat transfer parameters (a convective heat transfer coefficient and emissivity factors). The paper considers program development features related to setting functions such as differential equations, initial and boundary conditions. There are program codes of functions, of the main program and calculation results of the temperature distribution. A comparative analysis of problem solution in Matlab and the results obtained using the finite-difference relations demonstrates their good agreement. The paper shows the prospects of using standard Matlab functions to solve the identification problems of heat transfer conditions and optimization of product thermal treatment in various technological processes.

27. Development of an online radio mobile application [№2 за 2016 год]
Authors: Bychkovsky D.Yu., Abu-Abed, F.N., Khabarov A.R., Karelskaya K.A.
Visitors: 7555
The article considers the problem of informing the students and applicants of higher education institutions. The authors suggest solving this problem partially using student media and mobile applications, in particular a student radio. A student radio is not just a platform for training of journalists and specialists working with sound equipment, but is also a great mechanism for treatment of news and important events, live or not. An announcer during thematic broadcasting may announce whatever he will be asked or make a note which will include the etheric grid, thus the people listening to the broadcasting at this point will already be aware of what is happening. The mobile application allows accessing radio content from any location with a connection to the network. It may combine not only the means for reproducing the stream from the server, but also many other methods of quick and easy access to different information sources. The article describes data transfer methods from the server to clients, required basic functionality based on analytics for testing tie and the structure of the developed mobile application for on-line radio of the Tver State Technical University. There are also operating algorithms of its services. This article describes the aspects of working with the API requests and JSON data. It also gives the examples of API requests.

28. Visual analytics support system of VLSI layout design for double patterning technology [№2 за 2016 год]
Authors: Shakhnov V.A., Zinchenko L.A., Verstov V.A., Makarchuk V.V.
Visitors: 8960
The paper discusses a software tool for visualization and analytical support of VLSI layout design process. It is noted that visualization is a very important part of the system-on-chip design process. Nowadays a VLSI design engineer has to manage big data arrays during his everyday duties. The paper notes that the main purpose of visualization is data transformation from format that is suitable for high-performance computing to format that is convenient for human perception and cognition. An analytics support tool for system-on-chip design process is based on clustering and cognitive technologies for different project solutions representation of VLSI layout during its decomposition for double or multi-patterning. VLSI layout decomposition is based on graph models, e.g. a contradiction graph. The paper proposes an approach to clustering and classification of contradictions that a design-engineer has to manage during VLSI layout decomposition for double or multi-patterning. The authors propose different project solutions according their contradiction classification. They also illustrate the approach to contradiction visualization for the double patterning technology.

29. System analysis and decision-making on reengineering of corporate information management systems [№2 за 2016 год]
Author: Shilnikova O.V.
Visitors: 9438
Qualitative and quantitative analysis of functional parameters, performance properties and survivability in a distributed multi-level information management system is performed using computer modeling tools including simulation. The models take into account heterogeneity and variability of structures, network bandwidth and distributed database features. In recent years investigation of the evolving information system properties in corporation management has become topical. This article considers the evolution of information management systems (IMS). Modeling of support IMS performance process is carried out with using an optimal composition of the resources required at the first stage. The model takes into account the fact that system parameters gradually drift far enough away from the optimum and the phase trajectory is “attracted” to the stable but non-optimal point in the evolution. As a result, we can see that necessary features to achieve the bifurcation point are performed. The article proves the validity of the hypothesis about the need to release a new version of MIS. Bringing the system to even more efficient state without interrupting the life cycle requires some special solutions. One of them is a release of the next IMS version. Scientific research and consulting units in corporations can carry out systematic analytical study of IMS on their own, or set targets for outside organizations (universities or research institutes).

30. Training software to perform technological calculations [№2 за 2016 год]
Author: Valko D.V.
Visitors: 9092
One of the important problems in vocational education is the lack of modern problem-oriented teaching and research complexes in a significant part of technical specialties. It is accompanied by inaccessibility of dedicated industry software for educational organizations including the lack of free education equivalents. The aim of the article is to analyze the requirements and to develop software focused on using by the students of secondary vocational education in the specialty 22.02.05 “Metal Forming” in order to acquire professional competencies needed for a steel industry. The article states the criteria and requirements for software solutions in the field of teaching a technology of metal forming. It also analyses the most suitable software products including computer-aided design and modeling systems, their advantages and disadvantages. The developed software product for modeling manufacturing processes of metal forming in terms of calculating calibration systems during rolling by the method of B.P. Bakhtinov, M.M. Shternov, A.I. Tselikov can be recommended for effective teaching students about the basics of setup and operation of high-quality rolling mills and implementation of relevant calculations. The software product differs from its analogues by a simple step-by-step interface and the ability to be integrated into an educational process in the specialty 22.02.05 “Metal Forming” of the secondary vocational education. It allows you performing technological calculations on the calibration systems, such as box pass, diamond-square passes, oval-square passes, hexagon-square passes, oval-round passes, oval-rib oval passes. It provides the ability to edit and correct data while calculating, tabulating the calculations results with the ability to edit and save. The product can build diagrams of basic technological parameters (temperature, absolute reduction, etc.). Testing and introduction of the product is carried out using practical data on the rolling mills of the “Chelyabinsk Metallurgical Plant” in the South-Ural Versatile College, Chelyabinsk.

◄ ← Preview | 1 | 2 | 3