fuzzy logic

The article is devoted to the use of semantic analysis in the generalization of text documents. The analysis of features of the most widespread methods of generalization of text documents and an estimation of quality of results of an estimation is carried out. Features of the improved method of annotative generalization of text documents, which uses the principles of hidden semantic analysis and elements of fuzzy logic to identify semantically important sentences, are presented.

One of the key problems in the implementation of closed-loop control systems is to measure all states of a dynamic system, especially, when there are severe environmental conditions. Consequently, the use of certain types of sensors is impossible for technical or economic reasons. Also, in electromechanical systems, there are a lot of values that cannot be directly measured by physical sensors. Thus, mathematical algorithms named as observers and estimators are in use to calculate the states of the dynamic system utilizing math model and available set of sensors.

A fast convergence speed of an observer helps improve the capability to track the states of a system for an arbitrary divergence between a real and an estimated initial conditions.  This property of the observers is significantly useful if a system has fast dynamics and its states change rapidly.  Thus, the convergence time is one of the main performance criteria of linear and non-linear state observers.

Now for the developed countries of the world community is inherent to ensure quality by organizational and management measures, namely development, implementation, certification and continuous improvement of quality systems. Proceedings of the outstanding scientists of the twentieth century W. Shewhart, W. E. Deming, Joseph M. Juran (first introduced the concept of “quality control”), F. Crosby, K. Ishikawa, Armand V. Feigenbaum, H. Taguchi, T. Seyfi formed a modern strategy based on the application of quality management systems (QMS).

In this work has been increased quality of service in mobile systems based on efficient network and radio utilization of resources of heterogeneous network and optimal procedure of intellectual vertical handover based on cloud technology and fuzzy logic. Thus a novel network selection mechanism using intelligent agents has been proposed, which select the best network based on QoS parameters uses theory of fuzzy sets.

The method of content management as its life cycle stage based on fuzzy logic is proposed. The method of content management describes the commercial Web resources forming and automation technology that simplifies the content management. Ways and procedures of project decision making in management of commercial web-projects under conditions of incomplete and inaccuracy of some are described in the paper. Principal factors of project decision making were analyzed, reasons and nature of project characteristics of incomplete and inaccuracy are defined.

Описано функціональну структуру та особливості розробленого спеціалізованого програмного забезпечення інтерактивної комп’ютеризованої системи корекції стану користувача зі зворотним зв’язком.

On the example of two-mass fuzzy control system the influence of characteristic polynomial’s roots on the characteristics of a dynamic system is investigated. The conclusions about the advisability of setting controller to the appropriate standard linear forms depending on the size of the error of system’s output coordinate.