Informatica

Control laws' design strategies in order to stabilize a class of linear delay-differential systems are developed by using the matrix measure. A new measure, the delay measure, is introduced in order to clarify and formalize the results.

A fail-safe sequential machine is one that produces error signal when failures occure in the machine. This paper presents a new method of realization of fail-safe sequential machines under the following assumptions:

This paper is devoted to the new approach in the stability analysis of steady state solutions. Two important nonlinear optics problems are used as model problems. Stability properties of classical and splitting difference schemes are investigated. Some numerical results are given.

An algorithm testing methodology used in the programming teaching process is presented. Turbo Pascal system is used. Due to systematic use of some features of this system a pseudo-direct execution of algorithms expressed by Pascal procedures and functions may be ensured. The need to use data read and write statements is excluded. This enables a novice learner to concentrate himself on the main actions of an algorithm.

A classification of teaching forms is introduced. One-to-many (group) distance teaching forms are discussed with respect to the means, which are used in the programming teaching process. The role and the possibilities of electronic mail in this process is discussed. The experience of Lithuanian Young Programmers' School by Correspondence is referred to.

The hierarchy of information units and interactions in managing of Organizational Systems is ruther complicated. Interactions between departments of different levels of hierarchy are named “co-ordination” (Mesarovic, Mako, Takahara, 1970). This paper deals with the coordination as the “vertical” informational interfaces between the units called “elementary management cycles” which compose the structure of managing process.

An attempt to explain a basic nature of the information processing hierarchy in Organizational Systems is made. A framework for intelligent information processing at managing is presented. Organizational System (Enterprise) as the framework of so called elementary management cycles is decomposed. The structure of elementary management cycle (EMC) is presented and its properties discussed. A taxonomy of information processing hierarchies is based and presented. Such considerations seems to be important for the design of intelligent management information systems.

This paper is devoted to research aspects of the convergence rate of conservative difference schemes (d.s.) with time-adaptive grids in cases, where a space grid is irregular and the third boundary-value problem is considered for one-dimensional linear parabolic equations. The unconditional convergence of created d.s. is proved in a C-metric at the rate O(h²+τ0^1/2).

The universal structural type of information units-entities is presented the paper. This approach can be recommended for data base modelling at the conceptual and relational levels.

An analytical equation for a generalization error of minimum empirical error classifier is derived for a case when true classes are spherically Gaussian. It is compared with the generalization error of a mean squared error classifier – a standard Fisher linear discriminant function. In a case of spherically distributed classes the generalization error depends on a distance between the classes and a number of training samples. It depends on an intrinsic dimensionality of a data only via initialization of a weight vector. If initialization is successful the dimensionality does not effect the generalization error. It is concluded advantageous conditions to use artificial neural nets are to classify patterns in a changing environment, when intrinsic dimensionality of the data is low or when the number of training sample vectors is really large.