The paper deals with some aspects of EMC interference signal measurements in the presence of undesired ambient signals that appear mainly by an open field test site measurement. The method for efficient ambients cancellation is described, and discussed in the article from theoretical, as from practical point of view. The method, which is in the form of special hardware/software utilities already implemented in some modern electromagnetic interference (EMI) receivers, is based on ambient signals storing in an internal receiver memory and then on their “subtracting” from actual measured signals. Results of this concept depend first of all on the character of actual ambients signals, and on their time and frequency stability. After the theoretical background of the concept is stated, its effectiveness was checked in series of EMI measurements by using the EMI Spectrum Receiver from the Seaward Ltd. in the frequency range from 9 kHz to 1000 MHz. By this, we have used various types of simulated as well as real existing ambient signals and various modes of EMI receiver. The cancellation of ambients was tested for continuous harmonic signal, for continuous square wave ambient signal, and for signal of broadband white noise character. The simultaneous treatment of these types of signals was also investigated. All tests were executed under the Peak-Detection mode of the EMI receiver, some of their also by using the Quasi-Peak detection mode. Our measurement demonstrated, that the “subtraction” effect is more effective in Quasi-Peak mode measurement, as in Peak detector mode. Simultaneously, the accuracy of the cancellation increases with decreasing of the measuring frequency span. Thus, our practical experiences show, that by taking a proper measuring process, the obtained results are very good, and the cancellation of undesired ambients can be made very effectively. 

In this paper, the microstatistic multi-user detection receiver (MSF-MUD) will be introduced. The output of the MSF-MUD is taken as the sign of the multi-channel non-linear transformation of the output of a bank of matched filters (BMF). In the case of the MSF-MUD, this transformation is done by multi-channel conventional microstatistic filter (M-CMF). Because the M-CMF theory has not been available, a method of the time-invariant M-CMF design is developed in this paper, too.

The article describes a construction of a Boolean (Zhegalkin) polynomial with respect to a given Boolean function, and vice versa. It also presents a simple way of writing symmetric Boolean functions that allow easy construction of minimal disjunctive normal forms.

In the report, I depicted the new outlook on the problem of reliability of the network. It is the logistic point of view, taking into consideration the form of the terrain and infrastructure of the communication network, which is crucial for the time needed for the emergency forces to get to the place of breakdown. The presented logistic ratios describing reliability can constitute an additional tool aimed at decreasing the time of shortage of energy supply. The report contains also analyses conducted on the basis of data of the chosen distribution company. The final part of the research is correlation analysis being a basis for presentation of general dependencies.

In our paper we present a dealing with a mathematical language as a basis for formulating different kinds of specifications for a general problem solving by computers. We concentrate on the mathematical basis of data abstractions as program units with mathematically defined meanings and we concern with the development of programs from requirements to results.

Using fiber optics and microoptics technologies was designed an innovative fiber optic index of refraction transducer that has unique properties. On the base of this transducer a laboratory equipment type fiber optic refractometer was developed for liquid index of refraction measurements. Such refractometer may be used for medical, pharmaceutical, industrial fluid, petrochemical, plastic, food, and beverage industry applications. For example, it may be used for measuring the concentrations of aqueous solutions: as the concentration or density of a solute increase, the refractive index increases proportionately. The paper describes development work related to design of laboratory type fiber optic refractometer and describes experiments to evaluation of its basic properties.

This paper focuses on basic principles of learning algorithm design. It presents various principles employed in known learning algorithms dealing with different representations of concept definitions. It discusses pros and cons of application of the presented basic principles in relation with classification task. The focus is also on systematization of algorithm election or design in several steps. First, a problem / learning task is analyzed. Next, those of basic principles are selected, witch match the given learning task requirements. Lastly, a general algorithm is designed in the form, which can be transformed into a selected programming language without difficulties.