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The paper introduces a new methodology for evaluation of innovations. It is based on the notation of utility, depending on the capital rate of return and safety. Safety is definded as the notion complementary to the value at research risk (VaR). The value as safety (VaS) is and increasing function of reasearch and development period (T). The methodology enables one to derive the optimum utility maximizing...
In this paper an algorithm of fuzzy context evaluation for generalized conditional weighted fuzzy clustering is desribed. To find the unknown context values a preliminary clustering algorithm is employed. The application of several clustering methods in the process of context estimation is presented. An example of the Iris data classification problem is shown to illustrate the advantages of the proposed...
This paper presents a new method of so-called double-matched detection. It consists in matching the receiver filter both to the useful signal as well as to interference. The detection process consists of two steps. First, the signal + interference is whitened due to power spectrum of interference P(z). Second, the replica of signal is filtered via P-1(z) to match it to the new shape of useful signal...
The paper deals with cost - benefit - risk analysis of an innovation project. The analysis is considered in the case of two parties involved in the project realization, and negotiating joint venture contract. A model and a computer-based system are presented supporting the analysis and negotiation process. Some numerical results illustrating the problem discussed are included.
In the paper a concept and example of practical software realization of an object-oriented hybrid expert system using Case Based Reasoning is presented. The system uses Approximate Nearest Neighbour Algorithms and Artificial Neural Networks in retrieve stage of Case Based Reasoning cycle. The system has been successfully tested as a decision-making classifier of electronic filter realization technology...
The technology of CMOS very large-scale integrated circuits (VLSI) has achieved remarkable advances over last 25 years and the progress is expected to continue well into this century. However, even before the minimum feature sizes of the active VLSI devices reach the fundamental limits, this evolution is expected to encounter severe technological and economic problems when the dimensions go below...
Two properties of plane, steady, creeping flow generated in the infinite domain around a given contour by a single singularity are investigated in the paper. The first property concerns velocity field. It is shown, that stream uniform at infinity must occur automatically in this case, and formulae for velocity of the stream are derived. The second property concerns similarity of streamline pattern...
In the paper novel application of Lerner prototype filters in audio cosine-modulated filter banks is discussed and their optimal design is addressed. Since the Lerner filters are characterized with small and very fast decaying side-lobe levels they are mainly used in transmultiplexers in digital multicarrier (multitone) communication systems where stopband performance is critical. It is shown in the...
Necessary and sufficient conditions are established for the existence of a state-feedback gain matrix K such that the closed-loop characteristic polynomial is of the zero degree det[Es – A + BK] = α ≠ (α is independent of s). Necessary and sufficient conditions are also established for the existence of a solution X = InY = K to the polynomial matrix equation [Es – A]X + BY = U(s) for an unimodular...
The paper deals with dynamic circuits described by standard equation. The algorithm for estimating the range of capacitors or inductors values ensuring asymptotic stability or unstability of the equation points of some class of circuits is presented.
An improved version of programmable high-frequency operational transconductance amplifier (OTA) is presented. The designed OTA has been simulated and fabricated in CMOS technology. The results show that the OTA has the transconductance [formula] tuneable/programmable in a wide range of more than 450 times and the 3dB bandwidth larger than 300MHz. The OTA application for use in the Field Programmable...
The paper deals with the synthesis procedure of a closed-loop quadratic, near-optimal control of a linear, time-invariant system, subject to known, deterministic, external disturbances. On the basis of the approximate, open-loop control obtained for that system by application of Legendre polynomials method the state-feedback matrix and the input signal vector were found.
In the paper the vibrations of the complex mechanical system in non-stationary state have been analysed. The characteristics feature of the system is that all masses move along straight line and each of them, apart from the exreme ones, interacts only with neighbouring one. The interaction forces are ninlinearly dependent on displacements and relative velocities. The system in question is a model...
The method of continuous monitoring of acoustic emission (AE) descriptors was applied to monitor structural changes of the mesophase in the surfactant (CTAB) - silicate (TEOS) system in the water-alcohol solution. The AE signals that appeared due to structural changes about one hour after the solutions were mixed, differed both as concerned the times of duration and the maximum frequencies in comparison...
The paper presents the problem of external dynamic linearization of the discret-time systems defined on smooth or analytic manifold. The main result is that nonlinear system is externally dynamically feedback linearizable if its difference output universe is free. Moreover, the number of free generators of this universe coincide with the number of controls of the given system.
A novel solution for fully-balanced transconductance amplifier controlled from bulk terminals is presented. The circuit operates from a single supply voltage of only 1.2V and exhibits improved linearity over previously known solutions.
Fuzzy set theory [101] and rough set theory [68] deal with the concept of vagueness in the setting of set theory in seemingly different ways. The connection between these two theories of vague sets has been studied in [71], [94], [99], [100], where the probabilistic membership function of fuzzy set theory is derived within approximation spaces. This note initiates the study how "vague power sets"...
Equilibrium states of the positive 2D Roessner model with constant strictly positive inputs are defind. It is shown that the equilibrium states of an asymptotically stable 2D Roessner model are unique and positive and they are strictly positive if and only if the matrix A of the model is irreductible.
The problem of identification//tracking of a dynamic time-varying system is considered. The notion of an equivalent estimation memory, originally developed for exponentially weighted least squares algorithms, is extended to the other, frequently used adaptive filters: the least mean squares filters and the algorithms based on Kalman filtering. The concept of an estimation memory allows one to compare...
New concept of perfect full-order and reduced-order observers for linear standard continuous-time systems are presented. Necessary and sufficient conditions for the existence of the perfect observers are established. Procedures for designing of the perfect observers are derived and illustrated by numerical examples.
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