This article presents a new approach to developing an adaptive genetic optimization algorithm (MAGAMO/A) using agent modeling techniques. The peculiarity of this approach is the support of the mechanism of adaptive control of key characteristics of GA, in particular, the values of the probabilities of crossover operators and mutations, their types and other important characteristics that affect the population diversity and the rate of convergence of GA. Support for adaptive control is provided by using the mechanism of agent state charts and the specified rules of transition between the corresponding states that determine the values of the control parameters of the GA at the individual level of each agent-process. The review of the most popular GAs used for multicriteria optimization, including SPEA2, NSGA, MOEA, etc., is reviewed. The main metrics for evaluating the effectiveness of such GAs (Hypervolume, Generational Distance, distance between solutions on the Pareto boundary, etc.) are considered. The efficiency of the developed approach in the solution of optimization problems of large dimension on several test examples and in comparison with other known GA is demonstrated. The main directions of further research in the field of development of agent-oriented genetic algorithms are formulated.
In the context of the studies on natural language processing, this paper substantiates the topicality of semantic search for specialists based on natural language queries. It also states the requirements to applied computer systems aimed at solving this problem, such as the necessity to extensively use semantics of natural language and structure of an available corporate database in the process of search. The principal ideas for development of such computer systems are set forth. A significant distinguished feature of the proposed method is the usage of SK-languages (standard knowledge languages), introduced in the V. A. Fomichov’s theory of K-representations (knowledge representations), for formalizing semantics of natural language queries and for reflecting semantics of words and short word combinations in linguistic databases. The described method underpinned the design of a semantic search system ExpSearch, it was implemented in the programming language Python.
The article addresses the issues expert system development which provides style analysis of a written academic text in English produced by a nonnative Russian speaker. Producing a high quality text written according to the rules of contemporary Academic discourse is a challenging task for any nonnative speaker, even more challenging for novice writers. Since publishing in well recommended academic journals and magazines is a primary task for researchers using special software which checks style against criteria set by publishes might save time and effort. The system which implements the task of assessment of L2 written academic text against the style criteria set by publishers of academic journals is developed in CLIPS environment. The article provides comparative analysis of existing software products. On the basis of the analysis and identifying weakness and limitations of existing systems the major goals of the expert system are formed. The main steps of system development in CLIPS environment are presented in the article. In conclusion practical and pedagogical implications of the system are presented
In article the problem of mechanical processes modelling of radio-electronic designs is considered. It is supposed, that the basic complexity at modelling is made by process of construction of mechanical process model. The review of existing schemes of technologies of construction of modular models is executed. More perfect scheme of the technology which efficiency is shown on a practical example is offered.
Main stages of projective model order reduction (MOR) methods for electrical circuits include model construction by Pade approximation, implementation of Krylov subspace methods for essential decrease of computational noise, application of congruent transform to save circuit passivity, using block-Krylov methods for multiport circuits and multipoint rational-Krylov algorithms to mitigate the redundancy of reduced models. The considerable drop in the redundancy was achieved by applying singular value decomposition and by adaptive choosing the expansion points to be used for the moment matching. Thus, further progress in redundancy elimination cannot be provided by the modifications improvement of basis construction algorithms, and other directions to decrease redundancy should be considered. Known methods suppose direct connection of signal sources to network ports, thus resulting in the network solutions that often cannot exist in the framework of real surrounding. Then the reduction algorithm to provide required accuracy for such solutions excessively increases the model order
The article contains key results of a consumer study that identifies the role of modern Internet technologies in the communication process for medical organizations. The results are obtained during the market research, which consisted of three parts and aimed at the formation of the structure of communication environment for medical organization with the assessment of its use effectiveness. The results of the performed consumers study for medical organization presents model that describes the way of searching and selecting a medical centre by a customer. The model highlights 6 key groups of sources of information that are important for costumers. These are recommendations of existing users received in a personal conversation, by phone; recommendations of existing users received on forums, discussions in social networks; recommendations of doctors; website on the Internet; advertising (TV, radio, Newspapers, magazines), accommodation nearby. Also the model highlights 10 groups of parameters that influence the final choice of the medical organization. These are recommendations of existing users of the medical center, friends; recommendations of doctors; reputation of the medical center; convenient location; high level of service; price for services; specific specialist; qualification of doctors; uniqueness of the services provided; advertising. Taking into account the results of the study, the full map of the communication environment of the medical organization is given. The results of the study can be implemented by Russian medical organizations.
We consider a problem of computer assisted language and pronunciation learning based on the deep learning methods and the information theory of speech perception. In order to improve the efficiency of testing of pronunciation quality, we propose to train a convolutional neural network using the best reference utterances from the user. The experimental results proved that the proposed approach is characterized by higher accuracy and word recognition speed for several acoustic models when compared to conventional techniques.
This article presents an original information-analytical system developed using parametric approximation and simulation techniques and designed for scenario forecasting the dynamics of oil production in wells. This system is implemented as a software, the core of which is a simulation model developed in an IDE AnyLogic, integrated with a database and describes the dynamics of production at each well, taking into account implemented and planned geological and technical measures (GTM). A prototype system has been successfully implemented in Russia's largest oil company and used to predict the incremental oil production around the pool of all existing wells (more than 100,000 wells in the ten-year time frame), as well as assessing the potential effect of GTM for subsequent reallocation of resources between wells.
In today's democratic digital society, the relevance of conducting open and objective voting using new information technologies is increasing. Existing solutions to practically used voting systems focus on technical and legal issues, rather than on the application of new information technologies at the voting stage. The article analyzes the problems of modern electoral systems, and based on an analysis of their shortcomings, a method, algorithms and software implementation of a voting system based on blockchain technology applications with a special software implementation of smart contracts, in which the shortcomings of existing systems are eliminated, are proposed.
The article discusses criteria for comparative assessment of different computers. Special attention is paid to such criterion as performance. There is given analysis of the of the different methods advantages and disadvantages for performance measurement.
In this article we propose a new formalism — the structure of Petri nets (PN-structure) designed to study the models of complex systems. Structures or lattices are called partially ordered set in which any two elements there is a precise accurate lower and upper faces. In this paper we use the term "structure". Typed operations transformation Petri nets (PN) designed for the analysis and synthesis of new JV structures. It is shown that the introduced operations, allows us to decompose any SP into many linear or linearcyclic fragments (LF), which simultaneously will be treated as a class of automata Petri nets and class synchronization Petri nets. Presents operations only allow you to analyze structural properties of the JV, while there are a number of studies in which the analysis of behavioral properties of the PN. Describes the properties of PN-structures, introduced quasimatrices space structures PN. In the space of the PN-structures entities set multiple functions of evaluation, which introduced a system of scales, allowing a quantification of the properties of PN-structures. A distinctive feature of this formalism is an effective combination of properties of the device in PN with the possibilities of the theory of structures. The practical application of the proposed methods of analysis and synthesis of PN is demonstrated by the classic example of two ejectors designed to transport parts. Showing the procedure of the synthesis of alternative options PN-models of the system of ejectors, showing their advantages and disadvantages, as well as a quantitative assessment of model structures with the display in the selected coordinate systems.