Software & Systems

Articles of journal № 1 at 2016 year.

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21. A microcontroller for a fuzzy control system in a sensorless BLDC drive [№1 за 2016 год]
Authors: Lgotchikov V.V., Gorchakov D.V.
Visitors: 11930
The paper suggests an option to implement a control system for a BLDC sensorless drive using fuzzy logic. In this case, using a fuzzy logic controller makes the system more stable and increases the quality of motor control. After testing the system model in Simulink the authors created a base of fuzzy rules. Adjusting the drive phase switching moment is possible due to using the base of fuzzy rules. Fuzzy logic control system uses normalized values of current and a rate of rotation as input parameters. A fuzzy regulator adjusts the moment of commutation using the base of fuzzy rules. The paper describes the scheme and the algorithm of the proposed control system, which is based on a microcontroller. It also considers a program code for the microcontroller implementing the sensorless algorithm. The authors calculated minimal requirements for computational power of the microcontroller to create a control system. The analysis shows that almost any conventional industrial microcontroller is suitable for the proposed control system. As a result, it can be stated that using in-tellectual control methods in sensorless drive motors is reasonable due to the current level of computational devices' devel-opment. Such usage can significantly increase the quality of control while the cost of the whole system is almost the same.

22. Logical analysis of corrective operations to construct high-quality recognition algorithm [№1 за 2016 год]
Authors: Lyutikova L.A., Shmatova E.V.
Visitors: 8187
The article carries out a logical analysis on study domain, which includes the object and its characteristics described it in terms of running value logic. A research subject is methods and algorithms aimed to find practical solution to the problems of pattern recognition in weakly formalized areas or expertise. These areas include medical, technical, geological reconnaissance diagnostics, forecasting, expert systems construction. While solving such problems, a large number of incorrect (heuristic) algorithms were introduced. The authors examine the such aspects as: the importance of developing the theory of error-correcting operations, the synthesis of minimal complexity correct algorithms using mathematical logic. The most important problems in this field are the problems of logical regularity productive search in objects characteristic descriptions (when the objects are considered as elementary classifiers). The final rule uses a conjunction procedure for each of constructed elementary classifiers. As a general rule, recognition algorithm correctness (the ability to classify training objects correctly) is provided by correctness of each generated elementary classifiers. This is the basis of recognition procedures logical synthesis. However, to use the structures of a logic-algebraic approach in building correct recognition algorithms based on arbitrary sets of recognition algorithms including incorrect ones is of great interest. This paper considers the logical method of constructing algorithms, which includes sequential addition of a small part of unrecognized information. This method ensures correction of a previously constructed algorithm with insignificant changes of its characteristics. In many cases such inductive methods allow building highly accurate and correct algorithms that expand the area of the obtained solutions for substantially less time.

23. Comatch. A search engine for transcription factors cooperative binding sites [№1 за 2016 год]
Authors: Nikitin S.I., Cheremushkin E.S.
Visitors: 9147
Recognition of short sequences called transcription factor binding sites is one of the most important problems in bioinformatics. Transcription factor binding sites are short sequences located in DNA regulatory areas and play a key role in transcription process, which is a basic element of every living organism. About 100 algorithms are developed to solve this problem and a number of algorithms is still growing. However, there is no universal algorithm due to many factors that influence binding. For example, in complex living organisms transcription factors are joining into complexes during binding to DNA. Here we present a novel algorithm, which predicts statistically overrepresented transcription factors binding sites pairs. In this case the first site in a pair belongs to initially known fixed transcription factor and another factor should be found. The method uses two kinds of input data: an experimental sequence set and a background sequence set. It searches for significant difference between sites in experimental and background sets. As a result, a user obtains the list of binding sites pairs with P-values, which characterizes the probability to get a pair accidentally, and FDR (False Discovery Rate) is calculated for every pair. In addition, the authors developed a P-value cor-rection option for datasets overrepresented by the anchor matrix binding sites. In this case, dependence between P-value and the selected anchor matrix is made invisible. As a result, the significance of obtained results increases.

24. Development of access control model for the standard medical information system [№1 за 2016 год]
Authors: Olennikov E.A., Zakharov A.A., Olennikov A.A., Shirokikh A.V., Varnavsky V.V.
Visitors: 9450
The article describes a model developed by the authors to protect the security of data in medical information systems. At the beginning of the article is formulated and substantiated the idea that the use of health information systems in the classical models of safety significantly complicates the procedure of access rights settings to the data and makes the process very time-consuming. First of all it is connected with the need to provide access only to the data of the patient, who needed medical attention at any given time to carry out their professional duties. This requirement implies the need for constant adjustment of access rights of users of medical information systems. Thus, the security administrator workload increases substantially, and as a result increases the likelihood of error setting permissions. The solution to this problem the authors see the development of a new security model that takes into account the specifics of the organization to access data in medical information systems. The following is a detailed description of the developed model, which takes into account additional features such as access time, the current relationship between doctor and patient, the status of the patient, the degree of privacy and so on. It describes the basic elements of the operators of the model. Considered in detail the implementation of the procedure for determining access rights to protected objects. In conclusion, the authors conclude that the use of the developed model of security to protect the data in medical information systems allow to automate the process of assigning permissions and significantly reduce the workload of the security administrator.

25. Modeling of social and economic processes for subject of administration [№1 за 2016 год]
Authors: Piskunov A.A., Suvorov A.V.
Visitors: 4365
The paper describes a semantic topology of a concept structure for social and economic processes (SEP) in the Russian Federation. It is based on a formal model called a Special Form Dynamic Hypergraph. To describe SEP the authors define the notions of a sanction, an operation, a transaction. These terms are applied to design a SOT space (sanction, operation, transaction). In this SOT space the authors design calendar structure and calendar-technology structure within the model of Special Form Dynamic Hypergraph to describe some processes of elements modification and SEP structures.

26. Using Global-EAM and “2P-Kadry” to manage productive capacity of the enterprise [№1 за 2016 год]
Authors: Razinkov P.I., Razinkova O.P.
Visitors: 7291
The article considers the issues of software application to improve the productive capacity management in an enterprise. Improving the efficiency of using productive capacity of an enterprise is one of the most important factors of production crisis prevention. Development of production crisis depends on generatation and efficiency of using fixed assets, labour and other resources. The effectiveness of generatation and use of capacity, workforce and fixed assets is affected by external and internal factors. Their number and impact increases. Thus, it is not only necessary to consider the impact of external and internal environmental factors, but to model these processes. It will identify characteristics of the structural components of fixed assets, labor and other elements of the productive capacity of an enterprise. Modeling will allow more detailed analyzing element properties and predicting their possible behavior in different situations, under external and internal environmental factors. To solve these problems the authors prove the need to use Global-EAM and “2P-Kadry”. They can significantly increase the efficiency of using productive capacity of an enterprise.

27. Tactical trainers of anti-submarine aviation suites [№1 за 2016 год]
Authors: Sikorsky S.T., Tsukanov A.A.
Visitors: 9606
Flight crew training using flight simulators is essential in order to ensure safe operation of aircraft and helicopters, and the effective implementation of their tasks. Flight simulators are particularly valuable in military aviation as they allow simulating a real combat situation with no restrictions. This is very difficult to simulate in a peaceful time. The article discusses general theoretical issues related to feasibility and development of tactical aircraft system trainers for naval aviation. These simulators are designed for aircrew tactical training so that a crew could use aircraft systems independently and in cooperation with other forces in a unified information-modeling environment. Exercises are carried out at training complex using a method of “virtual” tactical exercises both as unilateral using “computer power” and as “dueling situations”. Weapon simulators and military equipment are in a modeling system, which ensures their operation in one information field. It allows soldiers to act as they would act in real combat conditions. The article considers possible structural schemes of tactical simulators for similar and different types of aircraft systems.

28. Equipment layout data insertion in a graph model of ship damage control analysis [№1 за 2016 год]
Authors: Sorokin V.E., Bolotov A.A., Reut E.V.
Visitors: 7844
Ship damage control evaluation is based on the ability of its technical means (ship systems) to withstand combat damage and emergency, ensure combat mission accomplishment and prevent its crash. Estimated functional dependency graph (EFDG) is a mathematical model based on structured-logical schemes of ship system operation performance dependence on the state of the elements of these systems. The graph is designed to estimate ship damage control in combat and operational damages of ship systems. This model logically formally reflects functional dependencies between functionally significant elements of various level of ship system equipment aggregation as they perform functionally independent operations. External simulation conditions on EFDG are set by equipment failure models caused by combat and operational damages. The article proposes including in EFDG the nodes of a ship sections (rooms) status with arcs reflecting equipment placement according to the electronic model of the ship. For a slight increase in model dimensionality, this significantly reduces the total number of original data and the amount of considered variants. Such approach allows performing an effective computational analysis of ship damage control for a single model, when this ship damage control is provided by its systems regardless of equipment failure causes. Thus, analysis computational efficiency allows extending the spatial and functional variability of modeling to determine a ship project with the best damage control assessment.

29. A software suite as a development training facility [№1 за 2016 год]
Author: Stolyarchuk V.A.
Visitors: 6229
The article describes the development process of an open source training CAE Sigma in a higher education institution aimed to train developers of CAE-based applications. For educational purpose the system development is considered to be continuous and never-ending process, in which the created suite is an object of design and an endless source of problems for students. The paper considers an aggregated list of issues and problems directly related to studying the method of finite elements, as well as features and algorithms of CAE systems that can be solved by students in order to modify and improve a software system. The authors briefly describe the suite, its structure, the calculation unit work scheme, as well as sub-systems that provide and facilitate system modification by the students during their learning process. The authors also note the disadvantages of the initial basic system that initiate the development of an advanced version of the suite, as well as the positive aspects of the implemented approach to teaching students. By virtue of the ability to import the geometric model from CAD-systems like AutoCAD and Solid Edge to the Sigma system and to export generated source data to AnSys and Nastran CAE-systems, the described suite considered to serve as the initial stage of commercial CAD/CAE-systems studying. The possibility to compare different CAE-system calculation results with identical source data is an incentive for students to more in-depth studying the finite element method and CAE-systems’ algorithms.

30. A respiratory sounds interpreter adaptated to signal recording devices [№1 за 2016 год]
Author: Khaneev D.M.
Visitors: 7415
The article considers the problem of constructing respiratory sounds interpreter programs that are customized for signal recording device parameters. When using neural network technologies for respiratory sounds classification, technical characteristics of electronic stethoscopes are different. Thus, the paper shows that it is necessary to readjust scales for assessing learning sample objects’ features. The paper describes the architecture and features of the software to analyze respiratory sounds records; it highlightes the subsystem for adjusting to a noises recorder, which allows generating an individual set of classification rules for each stethoscope model. These rules are generated by neural-like hierarchical structures; each of them synthesizes concepts of several respiratory sounds classes recorded by the stethoscopes of one model. The class descriptions are created using fuzzy features. The generation of scales for their evaluation is automated. The paper considers the results of system operation with 3 different types of respiratory sounds registration devices (3M Littmann 4100, an original device Pat. 66174 and KoRA-03M1 device) that have different characteristics. The analysis of the results revealed significant differences in the parameters of the classifiers of neuron-like hierarchical structures formed for different respiratory sounds recording devices. However, the generated rules showed similar results (88–93 % accuracy) of respiratory sounds interpreters for each electronic stethoscope model.

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