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This paper related to investigation of gastrointestinal (GI) motility sound's power. Developed special chest piece was used for this aim. This one can be configured to pick up and sound to electric converse of certain sounds and murmurs. The time-response findings of sounds emitted by GI operating good agree with digestion process.
The article is devoted to the calculation of benefit in fast operation of Hartley transform relatively Fourier transform which is approximately 36%. It is due to the absence of complex numbers in the calculations thereby reducing requirements to the processor system as a whole.
The paper introduces several variants of hierarchical Gibbs model applied for solving the problem of textured images segmentation. Binary contour preparation and three-valued texture preparation are used to describe textured images. We demonstrate the performance of the developed algorithms with examples of practical processing real textured images.
In this paper, qualification of the p-cascade tuned filter capacity estimation is presented for radio communication systems using multiposition phase-shift keyed signals with n-discrete states. It is shown that the capacity will be limited to the resolution time of linear systems that are present in the RCS linear radio-frequency section and that are an integral part of channel. The method of estimating...
This paper presents an antenna array for the third generation (3G) mobile communication. A numerical simulation results of the proposed antenna system in frequency band 1900 – 2200 MHz are obtained together with the relevant parameters. Array consists of four radiating elements of the same type, forming by truncated ellipses. Created an experimental model of proving the efficiency of the device that...
Due to fast development and complication of microwave radio technical devices, new miniaturization approaching are appearing. Compact devices should have comparable characteristics to standard constructions. In this paper the impact of substrate permittivity are observed, in the case of miniaturization problem for micro-strip branch-line coupler. Process on miniaturization initializing with fast and...
The present paper is devoted to influence research of the substrate material thickness on the miniaturization degree of the microstrip branch-line coupler device. The miniaturization is executed with the replacement of the ordinary microstrip line by its equivalent in the form of lower frequencies. There have been compared the numerical simulation results of the modeling of branch-line coupler structures...
The paper considers fusion of data streams of different nature which are describing properties of the same layered medium. It has been shown that combining these streams gives the fused stream with high intensity at the bound between layers. The simulation has shown that histogram of the fused stream have noticeable threshold between low and high intensity. The simulation has also approved that the...
The results of the analysis of the frequency dependence of the main energy indicators key generator forming a loop that operates without adjustment of the oscillating system.
In the thick blood sample images, problems of red blood cells counting and their analysis given by optical method were considered. Algorithms, based on Canny approach to edge detection, have been developed and realized with the following circle determination in the images by Hough transformation. The experimental test results of the algorithms are presented.
The article describes structural principles and generic mathematical model of the fine reading channel based on interpolation of a three-phase indication system. The device is intended for using as a part of two-speed displacement transducers. Implementation of the device can simplify the optical arrangement of the transducer with the same informative capacity.
The article describes structural design of using a rectangle Porro prism at a fiber-optic digital-to-analog converter (FODAC) intended for channeling of digital fiber-optic devices' channels.
The principle of parasitic responses appearance is discussed. It is demonstrated that the ambiguousness of multiple liquids determination occurs in conjunction with the presence of parasitic responses. An algorithm of primary responses selection in the background of high-order responses is developed.
The structure of microwave diplexers based on two-dimensional (2D) electromagnetic crystals of various size has been theoretically and experimentally investigated. In the proposed devices with high-frequency selective properties two rows of microstrip quarter-wave resonators electromagnetically connected with each other and with the input of the strip conductor are used. This allows splitting the...
New multimode irregular microstrip resonators and designs of wideband bandpass filters based on them are being theoretically and experimentally investigated. A central multimode resonator electromagnetically connected with single-mode or two-mode resonators at the input and output of a structure are used in the developed filters. It is the first experience giving the possibility of combining inherent...
The article describes the method of signals forming with usage of wavelet functions. This method is based on joint usage of pseudorandom sequence and wavelet function for widening of the spectrum of the signal. The modeling of facility which forms phase modulated wideband signal and wavelet modulated signals allows calculating an interfe-rence immunity of forming signals. The comparative analysis...
The mathematical model of an autodyne, under the influence of its own microwave radiation reflected from the object, microwave oscillator internal noise and power supply fluctuations are given. Calculations of signal and noise characteristics as a functions of the reflected radiation time delay are executed. Results of analysis are confirmed by the experiments performed on the 8-mm band Gunn diode...
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