Article
Воздействие микроволнового излучения на многослойные биологические ткани
The results of microwave influence aimed at the temperature rise in local area in multilayered biological tissues are given. the experimental results of temperature distribution in multilayered biological tissue are presented at the electromagnetic field frequency of 2450MHz. The model and analytic calculations for the temperature distribution inside the biological tissue are presented. The calculation results for the temperature distribution in multilayered biological tissues are given.
Theoretical and experimental results of microwave radiation influence on the multi-layered biological tissues at 2450 MHz electromagnetic field frequency oscillations. Model and analytical calculation method of the temperature distribution inside the volume of biological tissue are presented. The prospects of the microwave radiation therapy are shown.
The experimental research results of the basalt cardboard thermal treatment with the microwave electromagnetic energy application are presented in the article. The weight change diagrams of the basalt cardboard samples during the drying process are given. Changes in the temperature behaviour are analyzed on the surface and inside the samples depending on coupling medium. An advice on the drying process parameters improvement is given.
Theoretical and experimental research results in the field of highly effective rod material's with low thermal conductivity microwave heat treatment technologies are presented. Rods made of polymeric composite materials are used as reinforcement in construction industry. Proposed microwave throughout the volume uniform heating method of the dielectric rod removes the internal thermal stresses in the process of polymerization reactions. Volumetric heating of the dielectric rods leads to fullness of polymerization and high quality of products. A loaded long line with given boundary conditions was used as a model of microwave device with the processed material. Microwave device, consisting of two different in design electrodynamic system sections with complementary temperature distribution over the cross section of a rod, was proposed for a highly efficient dielectric rods' with different diameters heat treatment. The first electrodynamic system (round waveguide) provides the maximum temperature along the axis of the dielectric rod and its decline along the radius to the outer surface of the rod. The second electrodynamic system (diaphragmatic waveguide slowwave structure) provides the maximum temperature on the outer surface of the rod, and its decline along the radius to the axis of the dielectric rod. The resulting temperature distribution over the cross section of a rod from the two sections of the microwave device should provide the temperature distribution over the cross section of a rod, which satisfies the technological process requirements. Experimental studies were carried out on the electromagnetic field frequency oscillations of 2450 MHz with a rod of 40 mm in diameter. Divergence of the theoretical and experimental crosssection temperature values of the rod does not exceed 6%, and the temperature deviation in the material rod does not exceed 8% from the nominal temperature value. Polymer composite materials' thermal conductivity is very small and their heat treatment with gas or other known methods does not lead to the entire volume uniformity of heating, which leads to various flaws in the finished products during production.
The results of calculation and measurement of temperature distribution in the leasing out of dielectric materials which are heated up in the microwave devices wave-water type. The calculation method of microwave devices of a waveguide type of heat treatment of sheet dielectric materials. Considered microwave devices, Otley-exclusive feature of which is the change of the geometrical sizes of a narrow wall of a rectangular waveguide, working mainly on the type of waves to ensure a uniform temperature in the processed sheet the dielectric-dielectric material.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.