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Modern digital technologies make it easier to process and analyze large data. Because MR studies require the doctor to work with a large number of images, by the possibility of their construction-improving improves the quaUty of analysis due to faster processing.
The use of correlation analysis made it possible to characterize the relationship between the epiphysis — the central organ of regulation of circadian rhythms — and the immune system in various experimental situations: in mice of different lines and rats in conditions of disturbance of the light regime and the application of melatonin. Based on the increase of the number of correlation links between...
Importance of genetic algorithms (GA) usage in the investigation of an ultrashort pulse peak voltage in multiconductor structures of printed circuit boards (PCB) is highlighted. Trapezoidal ultrashort pulse propagation along the conductors of real PCB multiconductor bus was simulated. With the usage of GA, an optimization of the rise, top and fall durations of the ultrashort pulse was made by criteria...
The paper describes the simple technique for the quarter-wave symmetric output voltage waveform formation of the three-phase multilevel inverter. This technique is based on the applying the appropriate natural nonsymmetric three-segment vectors switching sequence to the recently proposed simple voltage source multilevel inverter space vector PWM algorithm. Some Mathcad simulated voltages waveforms...
The methodology to synthesis of a digital regulator for a solar battery energy conversion channel in a spacecraft power supply system is presented. The mathematical model of a shunt converter in the basis of commutation function has been developed, it is linearized and simplified. Simulation modeling power supply system with digital control has been carried out in solar battery energy converter operation...
The calculation technique of Fisher information matrix in the steady-state is used for the object parameters specification. The mathematical ratios are given. Modeling is executed in the Simulink environment. The transition process schedule is shown. The parameter estimation results for a case when an object is under the noise are given. It is offered to use the steady-state that it allows to simplify...
This paper considers the method of pattern recognition based on a convolutional neural network using Sobel filters. Parameters of the convolutional neural network blocks were chosen experimentally by software modeling in MATLAB. We presents the architecture of the convolutional neural network constructed with residue number system for delay minimization. Using of special type of modules allows to...
The experiments showed that when using various control algorithms, it is possible to significantly reduce the time of the model execution and the amount of memory expended, and increase the responsiveness of the model for control events. Using the new proposed version of the “event calendar”, you can significantly reduce the time it takes to test the model for performance. Using the agent at run time...
This paper shows the analysis of median filters with weighted central elements using for cleaning of images from impulse noise. The influence of the probability of obtaining undistorted pixels and distortion of the image pixel distribution function on the processing result is shown. We demonstrated that median filters with a 3×3 window allow to obtain a higher quality of image cleaning from noise...
High content screening (HCS) of microscopic images is a very active field in computational cell biology and a powerful technique to reveal how chemical, genetic, and environmental perturbations affect cellular state. HCS has been effectively used to study organelle morphology, drug discovery, signaling pathways, sub-cellular protein localization, and functional genomics. Hence, high content screening...
Importance of an investigation of the ESD effects on a printed cictuit board (PCB) bus of spacecraft autonous navigation system is highlighted. Simulation results of the ESD signals propagation along the conductors of the PCB bus are presented. The ESD current source according to the IEC 61000-4-2 was used. The peak voltage of 471 V in the active conductor of the bus with 50 Ohm terminations was obtained...
The relevance of controlling a level of conductive emissions of a modern radioelectronic equipment is noted. A description of the new device for monitoring the level of conductive emissions, which is distinguished by the absence of galvanic connection with the controlled line and by the integration into a printed circuit board is given. The possibility of determining the voltage spectrum of an interference...
Multicriteria optimization by genetic algorithms is considered. Parameters of multiconductor modal filters (MF) are optimized. Optimization with the use of a multicriteria objective function with amplitude and time criteria for matching with the characteristic impedance of 50 Ω is considered. One amplitude, two range-time and one interval-time criteria, as well as the matching criterion are used....
In this paper authors designed an application to increase the coverage path loss prediction. Nowadays there are a lot of the empirical and semi-empirical of radio propagation models. The models show the behavior of the radio signal spreading through the space. In this article, the COST 231 Hata model was considered. The model was made for the specific geographical location and electromagnetic conditions...
Computer translation system from Russian sound language to Russian Sign language, semantic analyses unit are considered in the article, advantages of taking into account these specifics are identified. The general case of translation (from sounding Russian into Russian sign language) is discussed. It is proved, that accounting semantic component in the translation process is a great advantage of system...
This article considers the approach to design of the diagnostic text in the medical expert system, which based on integration of the “European” and “Eastern” medicines. The Bayesian approach and the conditional entropy are applied to select more probabilistic diseases. The specified approach is implemented in the medical decision support system “Aimedica”.
We propose a method for semi-supervised classification using a combination of ensemble clustering and kernel based learning. The method works in two steps. In the first step, a number of variants of clustering partition are obtained with some clustering algorithm working on both labeled and unlabeled data. Weighted averaged co-association matrix is calculated using the results of partitioning. We...
The problem of designing bandpass FIR filters by frequency sampling method in case of one frequency sample (transition coefficient) in each transition band is considered. The analytical expressions for calculating these samples are obtained. Samples are calculated on the basis of criterion of minimum of the sum of squared frequency response values in selected points in the stopband. In the general...
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