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In this report, we suggest an approach to fault-tolerant multichannel digital averaging converter based on the usage of original structural organizations of hardware systems. Such systems are oriented on the processing of the measurement results presented in the pulse stream forms and perform primary functional conversions of pulse data flow on the base of integration of informational processes of...
A method of modeling of thermal field of substrate of semiconductor integrated circuits (IC), based on similarities of thermal and electric processes is proposed. Based on the proposed method, corresponding electrical circuit of IC heat exchanger, which consists of current source and resistance, is built. The commercial software modeling tool HSpice has been used for model implementation. The effectiveness...
A technique of finding a set of sequential circuit nodes in which Trojan Circuits (TC) may be implanted is suggested. The technique is based on applying the precise (not heuristic) random estimations of internal node observability and controllability. Getting the estimations we at the same time derive and compactly represent all sequential circuit full states (depending on input and state variables)...
The area of SRAM on the chip has increased significantly in recent years (up to 90% in projects of 2014–2015). Thus, the development of the new techniques for accurate estimation of memory block characteristics due to technology variation is required. One of the main problems is the accurate estimation of the minimal voltage difference (MVD), that will reduce the pessimism in the evaluation of performance...
In this paper, the graphical user interface design in Qt framework for the educational microcomputer Edulent to be used on different platforms is given. The benefits gained when compared to previous MFC library based Visual C++ implementation is also presented.
The problems of the synthesis and analysis of discriminators under the influence non-Gaussian noise with a band-limited are considered. It is shown that in the above case, the discriminator is dual channel. Therefore the characteristics of the nonlinear transformation unit of the discriminator are determined by the Fisher information relative to the density of probability distribution of the amplitude...
The paper is devoted to the analysis of the chirp signal generation method which significantly improves the frequency deviation parameter compared to the existing techniques. Self-phase modulation is known as an effect of nonlinear optics that causes a spectrum broadening of a high-power light impulse during its propagation over the optical fiber. In some cases, the optical pulse transforms into a...
An approach to address the shortcomings of existing steganographic systems is considered. The mechanism of detection of sustainable image areas on the basis of the method the edge enhancement image objects is offered. A comparative evaluation of the experimental results to identify areas for sustainable steganographic embedding is carrying out.
The parameter optimization features of CMOS operational amplifiers (OA) based on dual-input-stage under constraints on power consumption, unity gain frequency, phase margin, open loop gain and compensation capacitance are considered. It is shown that the maximum slew rate of the output voltage is proportional to the DC currents of dual-input-stage due to the usage of current mirror based push-pull...
The paper describes Spoken Document Retrieval system based on Speech Recognizer, Vector Space Model and high-order Markov chain phonemic transcribing method. Relevance of a document and an query is estimated by a weighted cosine measure. Phonemic transcribing allows to transform a recognized text of a spoken content to phoneme sequences. This phoneme sequences are used for retrieval by text user's...
The dried blood spot (DBS), a sample of filter paper bearing dried blood, has been applied in the field of clinical chemistry and pharmaceutical industry, for detection of different diseases and for drug development. This paper presents electrical characterization of DBS samples with different concentrations of a chemotherapy agent — drug methotrexate (MTX). Experimental characterization was conducted...
The work is devoted to the method development of an optimal control systems design for nonlinear technical plants basis on a Jordan controlled form of their equations. The definition of this form for the plants with single control is given. The solution of the problem design of the optimal system there is if all the nonlinear plant state variables are measured and the plant equations are represented...
A new architecture of the BiJFet of Op-Amps is proposed, in which the non-linear operating conditions of the input (DS) and intermediate (DP) stages are eliminated, when they work in the large-signal operation. As a DS, we use a scheme of class «AB» on BiJ and BiJF transistors with different principles of action. In the intermediate DP on the BiJT “folded” cascode an automatic switching of the signaling...
A majority-dynamic method of reconfiguring the on-board computer system in the time slot required for the control and diagnostics system performance is described. The described method provides fault tolerance of multiprocessor supercomputer rack in accordance with the concept of the integration of on-board equipment IMA. Using the control automat with implemented algorithm of self-diagnostic makes...
This article describes approaches to building a set of nodes and blocks that are sufficient to create the matching processor for the parallel dataflow computing system. Investigations of various sets of nodes and blocks of the matching processor have been carried out. As a result, some regularities were revealed characteristic for hardware-software solutions that implement the dataflow computing model...
The purpose presents the algorithm for software implementation of the expert system block to perform diagnostics and update the parameters of complex technical systems, operating in changing conditions when external factors assessment is presented in the form of fuzzy expert information. The block is intended to input, analyze, and update the expert knowledge, on the basis of which a fuzzy logic inference...
In order to improve the efficiency of the sparse matrices multiplication task on a traditional cluster supercomputer, it is necessary to take into account different levels of parallelism when programming. To work around these problems the dataflow computing model with the dynamically formed context and the architecture of the parallel dataflow computing system can be used. The article describes the...
We considered the issues of quasi-optimal signal processing with the correlated non-Gaussian narrowband noise on the background. It is shown that introducing a demodulator of blocks in the block diagram, where processing is carried out by instantaneous values and by the envelope of influencing non-Gaussian noise which range is comparable or narrower than the range of the processed signal, can improve...
A multi-parameter criterion and an appropriate approach for the arrangement of elements on the crystal surface for individual integrated circuit (IC) levels is proposed. The proposed placement criterion is identical to the traditional criteria for minimizing the total length of connections between the elements which makes it possible at the placement stage to apply an additive multi-parameter criterion...
The authenticity of the readings of accelerometers and magnetometers is of great importance when using sensors in orientation systems. At the same time, simple calibration methods do not always provide the accuracy required for operation. The article considers a method based on the calculation of correction coefficients using the method of least squares. The stochastic approach allows calibrating...
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