In this paper the method of reconstruction of the urban environment on the topographical plan. A method of recognition and classification of objects on topographic maps as buildings, vegetation, traffic lights, etc. &...
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Porous silicon (PS) layers were formed on silicon substrates treated with compression plasma flow. Lateral size and density of pores formed on the substrates treated with plasma are by 25% larger than that on untreate...
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The paper provides an analysis of acoustic emission signals recorded with fiber optic sensors during the propagation of ultrasonic waves in a polymer composite material. The fiber optic sensors for acoustic emission w...
The paper provides an analysis of acoustic emission signals recorded with fiber optic sensors during the propagation of ultrasonic waves in a polymer composite material. The fiber optic sensors for acoustic emission were constructed according to the scheme of an adaptive holographic interferometer. Unlike piezoelectric sensors, fiber optic sensors are distributed type sensors. This imposes certain features on the detection of signals in plates in which fiber optic sensors are embedded. It is established that the spectrum of acoustic emission signals differs in different directions of wave propagation. The local maxima of the spectrum are determined by the mode of wave propagation in the plate in different directions and the location of fiber optic sensors.
Numerical modelling of smoldering in porous media under natural convection is considered. Smoldering can be defined as a flameless exothermic surface reaction; it is a type of heterogeneous combustion which can propag...
Numerical modelling of smoldering in porous media under natural convection is considered. Smoldering can be defined as a flameless exothermic surface reaction; it is a type of heterogeneous combustion which can propagate in porous media. Peatbogs, landfills and other natural or man-made porous objects can sustain smoldering under natural (or free) convection, when the flow rate of gas passed through the porous object is unknown a priori. In the present work a numerical model is proposed for investigating smoldering in porous media under natural convection. The model is based on the assumption of interacting interpenetrating continua using classical approaches of the theory of filtration combustion and includes equations of state, continuity, momentum conservation and energy for solid and gas phases. Computational results obtained by means of the numerical model in one-dimensional case are compared with the experimental data of the smoldering combustion in polyurethane foam under free convection in the gravity field, which were described in literature. Calculations shows that when simulating both co-current combustion (when the smoldering wave moves upward) and counter-current combustion (when the smoldering wave moves downward), the numerical model can provide a good quantitative agreement with experiment if the parameters of the model are well defined.
The advancement of method of nonlinear soft sensor development using a nonparametric approach based on the example of industrial multicomponent distillation column is considered. The proposed procedure for soft-sensor...
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This paper considers an approach to creation of reliable dead reckoning system (DRS) for autonomous underwater vehicle (AUV) with accommodation to incorrect sensors information. Proposed DRS is based on using of diagn...
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The paper provides an introduction into the area of inductive formation of knowledge bases and highlights the current topical problems, including the interpretability of the results. A method is suggested for inductiv...
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The paper provides an introduction into the area of inductive formation of knowledge bases and highlights the current topical problems, including the interpretability of the results. A method is suggested for inductive formation of easily interpretable medical diagnostic knowledge bases. It includes the new definitions of classification and clustering problems for dependence model with parameters, the learning algorithm (solving mentioned problems in their new definitions) is developed for the practically useful and easily interpretable mathematical dependence model with parameters, which is a near real-life ontology of medical diagnostics (defined by a system of logical relationships with parameters). Also included is the software package InForMedKB (INductive FORmation of MEDical Knowledge Bases), which implements this mentioned learning algorithm.
The various formulations of the problem of technical diagnosis are possible when coming to the creation and use of analog circuits. One approach allows deviation parameters sufficiently large set of parameters of the ...
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The recently discovered, ultralow-threshold, nonlinear refraction of low-intensity laser radiation in dielectric nanostructures has an atypical dependence on radiation intensity in the pulsed and continuous modes. In ...
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The recently discovered, ultralow-threshold, nonlinear refraction of low-intensity laser radiation in dielectric nanostructures has an atypical dependence on radiation intensity in the pulsed and continuous modes. In this study, we present a theoretical explanation. The theory suggests that the nonlinearity is photoinduced in nature, rather than thermal, and depends directly on the nanoparticle electronic structure and the relationship between permittivities of the dielectric matrix and the nanoparticles.
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