Work is dedicated to the synthesis of neural network to inverse kinematics task of spherical parallel manipulator. This neural network is used for calculating of the desired orienting drives rotation angle for this pa...
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Work is dedicated to the synthesis of neural network to inverse kinematics task of spherical parallel manipulator. This neural network is used for calculating of the desired orienting drives rotation angle for this parallel manipulator. The carry out investigations showed high efficiency and accuracy of the approach proposed.
In the article are given the results of the researches of the glass sea sponges Hyalonema sieboldi and Ferronema sp. spicules as new object of nano-photonics. The distribution of refractive index over the cross sectio...
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This work presents an adaptive fiber-optic interferometer which is based on multimode optical fiber (MOF) as a sensor and diffusion holograms recorded in semiconductor PR crystal CdTe:V without any electric field as a...
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This work presents an adaptive fiber-optic interferometer which is based on multimode optical fiber (MOF) as a sensor and diffusion holograms recorded in semiconductor PR crystal CdTe:V without any electric field as adaptive phase demodulators. Vectorial mixing of light waves (lambda = 1064 nm) with different polarization states (linear and elliptical) in the geometry of anisotropic diffraction makes possible to avoid applying electric field to the crystal for realization of linear phase-to-intensity transformation. At the same time recording of the hologram at high spatial frequencies (Lambda ap 0.19 mum) in the reflection geometry with appropriate concentration of PR centers allows to increase both hologram efficiency and, as a sequence, interferometer's sensitivity without applying external electric field to the crystal.
The results of investigations devoted to a search of conditions of the simultaneous metal and semiconductor silicides formation being important problem for microelectronics are presented in the paper. The Si(111)-Fe a...
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A relaxation-contour method for retrieving motion vectors from sequential satellite images is presented. The contour part explores image contours (level set) to extract targets (extreme points on these contours). Moti...
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A relaxation-contour method for retrieving motion vectors from sequential satellite images is presented. The contour part explores image contours (level set) to extract targets (extreme points on these contours). Motion vectors are derived by examining the correspondence between targets extracted from symmetrical pairs of images. The basic criterion is geometrical similarity of contours taken at the same level (contour matching), while gradient information is used to sustain robustness of search. Vague contouring generates much more motion vectors than by the current template matching methodology. Naturally, many invalid vectors are generated in this way, yet their abundance gives preferentiality to a relaxation labeling approach aimed at selection of correct vectors from several candidates to be consistent (in space and time) with others. Estimates of water vapor motion vectors obtained using relaxation-contour and maximum cross-correlation (with and without relaxation labeling) methods have been compared to those derived manually. Results show advantages of the relaxation-contour method both in density and quality. We contemplate future integration of this scheme with assimilation models.
The paper deals with the sequential synthesis procedure of decentralized (multi-loop) PID-controllers based on the estimation of control loops interaction in the form of multiplicative plant uncertainty. It is shown t...
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The paper deals with the sequential synthesis procedure of decentralized (multi-loop) PID-controllers based on the estimation of control loops interaction in the form of multiplicative plant uncertainty. It is shown t...
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The paper deals with the sequential synthesis procedure of decentralized (multi-loop) PID-controllers based on the estimation of control loops interaction in the form of multiplicative plant uncertainty. It is shown that the each synthesis iteration is accompanied by the correction of the robust performance criteria for the coupled SISO-systems. The results of industrial application of proposed sequential design for reactive distillation unit is cited as well as comparison analysis with the other techniques is given.
The real-time optimization (RTO) system of distillation column has been proposed using sliding modes. On the basis of formulated optimization problem, the parameters for the distillate composition controller are so se...
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The real-time optimization (RTO) system of distillation column has been proposed using sliding modes. On the basis of formulated optimization problem, the parameters for the distillate composition controller are so se...
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The real-time optimization (RTO) system of distillation column has been proposed using sliding modes. On the basis of formulated optimization problem, the parameters for the distillate composition controller are so selected that the condition for the occurrence of sliding modes holds in order to provide a search procedure. An investigation of the transient performance of RTO-system under feed composition disturbances indicated a stable tracking for the shifted optimal distillation operating points.
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