Published:
2004-04-01
Articles
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At the moment, the theory, methods and techniques concerning the application of mathematical models are wide-used. The research in this field is very intensive, and area of applications and range of the models' classes are growing permanently. Nevertheless such problems as a problem of multi-criteria models' quality estimation, a problem of analysis and arrangement of models' classes, a problem of justified selection of applied task-oriented models are not well investigated yet. The importance of the considered problem increases when the object of research is described not via a single model, but via a multiple-model complex, consisting of models related to different classes or combined models (f. e. analytical-imitating, logical-algebraic, etc). Aforementioned problems are the primary objects of the theory of mathematical models' and multiple-model complexes' quality control. The article presents methodological and technical basics of this theory.
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The article is devoted to different approaches for decision support systems (DSS) elaboration and utilization. Various types of mathematical models and mathematical methods stored in libraries and used in decision support systems are analyzed. The ways of criteria formulation for models evaluation are recommended. On this basis cost effective method for DSS models selection and elaboration is proposed.
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The real existence of the market occurs in terms of its segmentation. The task of searching rational behavior strategies both suppliers and consumers on the different market segments taking into consideration a large number factors is actual. The article is devoted to the model 2×2×2, including two suppliers, two consumers associated on the two market segments and task of searching of rational suppliers behavior policy.
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Proposed approach allows estimation of software reliability in case of absence of reliability information of its components.
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Logical-and-linguistic simulation and analysis of purposes suppose first of all linguistic formalization of purpose. The special activity model of purpose used for linguistic formalization of purpose is suggested. The model of purpose and the adaptive language of purpose representation based on it are discussed.
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A new approach to optimization task formulating and solving for economical analyisis is suggested and discussed. The task is formulated as a fuzzy optimization task in terms of developing theory of fuzzy numbers and fuzzy functions. A simple exsample of the fuzzy optimization task is presented. That is concerning to financial providing for a technical complex development.
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One of the major problems in developing the theory of bayesian belief networks remains the problem of having directed cycles in the belief network graph. In this paper we consider a belief network consisting of a single cycle of n vertices. We suggest techniques for handling this network. We prove that in order to check consistency in the general case one has to consider the joint probability distribution of all the vertices in the graph.
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The Deep Data Diver system uses a new technology of associative rules search which is based on modified tools of linear algebra and the usage of a data self-organization procedure and an informational structural resonance effect. The unique characteristics of the system allow to search data for highly accurate associations of the items comprising the initial transaction set with a given item. These sets form a basket with high support level and long itemsets. The article provides a general overview of the Deep Data Diver system and gives the comparison results of solving the specific task of market basket analysis.
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Image is presented as the superposition of invariant and arbitrary representations. In accordance with invariance condition the first representation (VCND) does not depend on the second оne in prescribed limits of arbitrary intensity variation for each image pixel. The total volume of arbitrary representation is treated as non–probabilistic adaptive estimation of information amount. Some experiments are described.
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The overview on evolution of digital technologies is leaded. The difference between paradigm of digital realization of analog models and digital technologies is noted. The algorithmic approach to audio video signal processing is considered.
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The different approaches to TV signal information redundancy decreasing are viewed. The advantages of proposing method of adaptive dynamic segmentation from the viewpoint of psycho-physiologic perception are shown. The methods for efficiency estimation of information redundancy decreasing are considering.
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There is introduced in the article that the imitation of optical effects using modern computer vector graphics programs opens up new possibilities for the experiments in the field of catoptrics. The results of experiments on imitation of 2D and 3D objects reflections in the mirror surfaces in the environment of 3D Studio MAX are introduced.
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The brief survey of existent architectures of multimodal interfaces and systems, which use speech as one of the main components of information input, is presented in this paper. The key differences between unimodal and multimodal interfaces as well as possible methods for multimodal information fusion are presented. The applied domains of multimodal interfaces both in state-of-the-art and in perspective systems of human-computer interaction are described.
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The conceptual model of representation of natural language and subject domain for model of integral speech understanding is proposed. The model is based on the methods of object domain processing and generalised form of semantic-pragmatical information presentation.
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Reviewed major components of speech interface, its current usage and principles of organization.
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Ones of the perspective mechanisms supplementing existing mechanisms of information resources protection in computer networks are malefactors’ deception mechanisms. These mechanisms are intended for increasing the security of target information systems on the base of attraction of malefactors to false information goals, deceptions, identification of their actions and disclosure. Malefactors’ deception mechanisms are realized by means of development and usage of deception systems (DS) or components named also false information systems, simulators of information systems, traps or honeypots. The paper defines the destination, functions and structure of DS, presents their classification, submits the offered approach to development of perspective DS, offers the schemes of realization of disguised counteraction against network attacks and architecture of the DS prototype developed, describes the experiments spent with the prototype.
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The approach to the enciphering, based on use fractal iterative functions is offered.
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The paper presents information technology for immersion of arbitrary computer-synthesized virtual object, in particularly, robot-manipulator, into real environment. Developed technology provides visual and tactile-force effects of perception. The technology realizes so called Augmented Reality which is fast developing branch of Virtual Reality. Virtual object in this case is augmentation to Reality. Unlike from the known variants the technology presented by the paper provides more realistic perception of the virtual object into the real environment and this technology requests more small expenditure. In this issue the first part of paper is presented which is devoted theoretical description of technology. Second part of paper will be presented in the next volume of issue, it is devoted experimental results.
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Methods for solution of artificial intelligence problems on the base of multi-valued and probabilistic logics have been discussed. Logic and network approach for analogous derivation has been suggested. Method for regularity search, logic-axiomatic and logic-probabilistic methods for learning of terms and pattern recognition in the case of multi-valued logic have been described and generalized.
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Methods for functional diagnostics of robots and mechatronic systems on the base of their direct and inverse dynamics models have been suggested. Criteria for correct functioning have been formulated and dynamics models of faults have been presented. Methods for fault-stable programme, stabilizing and invariant control for programmed motion have been described and evaluations of permissible boundaries (tolerances) of possible faults have been obtained. Use of these methods in combination with algorithms for identification with finite time of adaptation provides high quality and correctness for functioning of robots and mechatronic systems in a wide class of possible faults.
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The paper describes and analyses a proposed contract net protocol designed as a part of the being developed “SIZ”-approach. Improvements to the contract net protocol concern the formalism of agents’ knowledge representation and the scenario of the agents’ interaction. For the agents’ knowledge representation and manipulation a formalism of object-oriented constraint networks is proposed. Modifications related to the interaction scenarios include introduction of iterative negotiation, concurrent conformation of proposals, extended set of available messages, an additional role for agents and agents’ ability to change their roles during scenarios.
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Rule based executable specifications of interacting different dynamic processes are discussed. Possible structures of process state transition rules are presented and peculiarities of simple hybrid process programming, based on these rules, are considered.
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The paper describes importance of the task of knowledge indexing for knowledge search in the knowledge management systems. It presents a decision of this task with use of knowledge map in the framework of the developed scientific approach to knowledge logistics “Knowledge Source Network” (“KSNet”). The formal model of knowledge map and requirements to its building are presented.
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Requirements for Decision Support System for relational database refactoring are proposed and problems that this System should solve are formulated.
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The discrepancy issue between two notions of informatics as a higher school subject and as a science is considered. To overcome this issue, a new notion of informatics as a higher school subject is given on the basis of the object oriented approach and analysis of the modern Russian laws and norms in the area of higher education. In the paper, there is a classification of higher school subjects and annotated magisterial programs, studied by students with specialization in the area of informatics.
