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A fuzzy logic inference method is proposed for higher-order Takagi–Sugeno systems with applying the order reduction operation to rules. The possibility of using hierarchical fuzzy higher-order systems to decrease the number of rules and to parallelize fuzzy inference is analyzed. The method is implemented in an intelligent software system to speedup computations in the problem of evaluating investment projects. 相似文献
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Metallurgist - Pearlite transformation is a necessary step in the production of ultra-high strength wires and nanostructured bainitic steels. The initial austenite grain size has an important... 相似文献
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B. G. Yershov P. A. Morozov A. V. Gordeev A. F. Seliverstov 《Journal of Water Chemistry and Technology》2009,31(6):381-388
The paper studied the impact of the pH and temperature on kinetics of ozone decomposition in water. It has been shown that
in the pH range 4 to 8 it is well described by the equation of the second order reaction. At an increase of the pH and temperature
the rate of ozone decomposition increases. The relationship between the logarithm of the constant and the pH at 19°C corresponds
to the equation log k(pH) = −0.7 + (0.49 ± 0.03)(pH 4). The energy of ozone decomposition activation constitutes 76.0 ± 8.3 kJ/mol. The presence in
the solution of phosphate ions and tert-butyl alcohol substantially increases the rate of the decomposition chain process. 相似文献
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D. Skripniks S. Sarkovskis A. Yershov E. Grab 《Automatic Control and Computer Sciences》2017,51(4):279-284
This article proposes special digital filtering structures formed by one multiplier, one adder and a delay line. Such structures can be used to synthesize finite impulse response Hilbert filter. The advantage of such approach is reduced number of multipliers, compared to standard implementation. The quotients of structures can be calculated by local optimization methods. This article shows an example of the 30-th order Hilbert filter calculation, which requires only 6 multipliers for implementation. 相似文献
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The results are presented of experimental studies of electrical discharge occurring in the atmosphere along a free water surface
between a spike above the water surface and a remote submerged electrode during quasi-rectangular high voltage pulses. Three
stages of such discharge are identified, and the stage of the discharge gliding along the water surface is investigated. 相似文献
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Serhii Tkachenko David Nečas Oleg Datskevich Jan Čupera Zdeněk Spotz Martin Vrbka 《摩擦学汇刊》2016,59(2):340-351
In this study, a series of Ti–Si-based in situ composites was manufactured by means of a common argon arc melting technique and tribologically evaluated using a sliding ball-on-disc tester under simulated body fluid lubrication. The composite microstructure, mechanical properties, and surface roughness were characterized using light and scanning electron microscopy (SEM), vertical scanning interferometry (VSI), X-ray diffraction (XRD) analysis, and hardness measurements. The evolution of coefficients of friction (COFs) and the appearance of contacting surfaces showed that two the principal wear mechanisms were mixed elastohydrodynamic lubrication (EHL), typically followed by abrasive wear. The mixed EHL was due to the combined effect of serum solution lubrication and surface irregularities, which were produced during the routine surface preparation of samples. The mixed EHL provided the absence of wear and low and stable COFs, which did not depend on the phase composition, microstructure, or hardness of Ti–Si-based alloys. However, in most cases, the change in contact geometry led to the transition from mixed EHL to conventional boundary lubrication, accompanied by increased and unstable friction, adhesive material transfer of metal to the ceramic counterbodies, and abrasive wear. In this respect, the low wear resistance and high adhesion affinity of the titanium matrix of Ti–Si-based alloys should be improved. 相似文献
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A. V. Zelenkov D. Liepkalns A. Yershov A. Maklakovs 《Automatic Control and Computer Sciences》2012,46(1):25-33
The designing of a continuous wave radar (CW) intended for remote counting of traffic (remote traffic counter) and speed measurement
of vehicles using speed trajectories in the radar beam for long-range transferring of these data is considered. It was experimentally
shown that, for recording the current number of vehicles and measuring the speed of each of them in both traffic directions,
it is more expedient to use a CW radar rather than an FMCW radar (frequency modulation continuous wave radar). A CW radar
is more immune to noises of the receiver and the interferences formed due to the offset of the phase and amplitudes at quadrature
outputs of the IQ mixer, the lateral lobes of the antenna directivity diagram, and interfering reflections from low Doppler
and stationary targets. The circuit and the signal processing software for the CW radar have been developed. The CW design
proposed by the authors is currently implemented based on the Xilinx FPGA programmable logic integrated devices (PLD) entering
the working radar prototype. 相似文献
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A complex of problems related to the category-theoretic formalization of fuzzy UML diagrams, fuzzy graphs, and fuzzy-graph
transformation systems is examined. The basic constraints that must be satisfied by UML diagrams, which are the basis of fuzzy
models of intelligent systems, are investigated. The category-theoretic approach is used to analyze the properties of inference
specification based on a distributed system of fuzzy-graph transformations. Means for the compositional construction of fuzzy
systems are developed using morphisms and categories of fuzzy graphs. 相似文献
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Constitutive equation of rheology describing a phenomenological level of superplastic deformation as functional correlation between tensor components of stress and strain rate has been analyzed for the case of superplastic ceramic flow. Rheological properties of material are taken into account by means of scalar rheological coefficients of shear and volume viscosity, which are functions of temperature, effective stress (or strain rate) and density of material. 相似文献