×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • A method of numerical modeling of spectrometric systems of gas sensors

      A principle of spectrometric systems of gas sensors was described. A model and a method of numerical modeling of spectrometric gas sensor with the combined radiator-receiver of infrared radiation on the basis of the punched semiconductor thermoresistor were proposed.

    Keywords: spectrometric gas sensor, model, method of modeling

  • University marketing: market policy, innovative self-employment of graduates and creation of hi-tech startups. Part 1

    The results of theoretical analysis and application development of the marketing concept that underlies the market policy of the university, determining the direction and content of the education services, creating opportunities and conditions for self-learners and graduates are given. Special attention is paid to the marketing of education services and self-employment of graduates, focused on startups, high technology and scientific capacity production, as potential innovators of Russian economy modernization, which is to acquire the features of new economy and knowledge economy. The article can be useful for economists and technical specialists dealing with the problem of increasing the efficiency of educational institutions, employment of graduates and development of self-employment.

    Keywords: Marketing, market policy, university, educational services, self-employment, startup, labor market, new economy, knowledge economy, high-technologies, scientific capacity production

  • Mathematical and statistical models predicting efficiency of surgical treatment of certain diseases

    Article focuses on the use of statistical models to predict tolerability surgery using intracavitary hyperthermic chemotherapy (IHCT) and the definition of indications and contraindications to perform operations and tolerability for patients with cancer based on the hemostatic patient. This technique allows a high enough accuracy to prediction portability planned surgery, duration of disease-free period, the period and quality of life in the immediate and late postoperative period.Improve treatment of patients with malignant tumors of the abdomen and pelvis, is one of the priorities of modern health care. Relevance of various parameters of immunity, clinical and biological parameters of homeostasis and prognosis of malignant disease in humans will significantly reduce the proportion of late diagnoses of relapses. Recently there has been increased research to find a method of complex cytoreductive surgery and the use of cytotoxic drugs, and physical therapies, one of which is a local intraoperative hyperthermic chemotherapy. With the help of statistical methods has been studied the degree of influence on the parameters IHCT immunity and an estimate of the nature of the immunological changes in different types of surgery. Methods of binary logistic regression analysis was calculated diskriminatnogo forecast portability operation - patient survival probability. Based on the method of multiple regression were obtained algorithms calculate the duration of life of patients after surgery, and the duration of DFS. Studies based on the factor analysis showed that the main factors affecting the prognosis of disease-free period and the period of life are the morphological structure of the tumor volume cytoreduction, the sum of your immune system and cancer markers. Peritoneal cancer index, sex and age of the patient does not have a significant effect on these parameters. Thus, the introduction into clinical practice of the proposed computer systems and statistical forecasting models allow physicians to objectively evaluate the performance of homeostasis, the portability of the planned surgery, more accurately predict the course of the cancer disease and the likelihood of recurrence of the disease and the duration and quality of life.

    Keywords: statistics, modeling, forecasting, surgery, colorectal cancer, disease-free life expectancy, tolerance of surgery, immunological parameters, factor analysis, regression equation

  • Quantum-chemical analysis of various ways of the organization of polymers based on 3-alkyl pyrroles for gas sensors

      Polypyrrole is a perspective material for gas sensors. Property of polymeric chains can vary largely depending on their packing. Power characteristics are studied. Features of a structure and power tetramers thiophenes with methyl, ethyl, propyl substitutions in position 3 pyrroles a cycle are investigated. The most perspective and stable tetramers are revealed from the thermodynamic point. The estimation of laws of formation of a polymeric chain is spent.  Influence of the assistant on stability tetramers is considered.

    Keywords: Polypyrrole, quantum-chemical research, influence of alkyl substituents, tetramer, cycle, polymeric chain, power tetramers

  • Priority problem green building in Rostov-on-Don

    To create in Rostov-on-Don, ecologically effective, technologically advanced and durable green plantings to solve the problem: 1. Create a variety of trees for landscaping cities and towns; 2. Determine the principles of green plantings, ensuring their maximum environmental efficiency. In the steppe zone of Russia should use the structure of the park, with a high proportion of dense plantings (400 trees per hectare) of long-lived trees of the first magnitude.

    Keywords: green building, greening cities, assortment of trees, ecologically effective green plantings, the steppe zone

  • Multidiagnostics system for patients with postural deficits and algorithm for recognizing stabilographic signals

      Work is connected with the synthesis of information behavior of groups of autonomous intelligent agents of biomedical research, and machine learning methods to ensure the reliability of the forecast increase in their behavior using multi-agent systems based on the use of bionic principles, methods and models of swarm intelligence. Developed multi-agent system simulates the behavior of groups of autonomous intelligent agents developed methods to meet the proposed criteria of reliability, differing form the structure of the system and developed a set of specialized agents that provides the capability to model a group of biomedical robotics using autonomous intelligent agents. Classifier of stabilographic signals on the basis of Parzen method was developed. These data indicate that the auxiliary symptoms resulting from multidimensional scaling much more informative initial attributes.

    Keywords: Intelligent agent, multidiagnostics, Parzen classifier

  • Structural design of information and measurement systems for biopotential research

      The mathematical features of construction information and measuring health systems (IMS). Because biological systems are complex, not always well-defined structure, for their correct description and implementation of metrological analysis requires its imposition. Accordingly, the presentation described bioinstrumentalnoe MIS. Within the theory of metrological synthesis formulated the concept of IMS core. With the use of the mathematical theory of categories and object-oriented modeling describes the basic relationships between the elements of the core IMS. The basic position with regards to the construction of MIS based on its structure. A scheme of the developed system of environmental monitoring of water environment on the basis of an integrated assessment of water quality. The main components of the system were presented. Feature of the developed system is the consideration of non-fixed sources of pollution, which was made possible thanks to the developed method of integral evaluation.

    Keywords: Measuring health system, object-oriented modeling, method of integral evaluation

  • Principles for the development of biopotential amplifiers and method of processing data on reactions

      The requirements to be met by a data acquisition system in terms of each of the problems to be solved. Presented electric concept developed biopotential amplifier with a total gain of 2000. The theoretical model of the spectrum of RR intervals and changes depending on the running processes. The analysis revealed that the resulting spectrum satisfies the conditions considered in the theoretical model, and can be further analyzed with fractal characteristics.

    Keywords: Instrumental amplifier, biopotential, fractal index

  • Multichannel OpAmp and JFET follower IC on radiation hardened array

    The features of circuit engineering and results of chip computer simulation which consists of 4-channel operational amplifier (op amp) and 2-channel electrometric voltage follower, designed for pre-processing of sensors signals in high-energy physics are considered. 
    The characteristic properties of designed op amp are the absence of current source in the input differential stage and the use of parallel high-frequency channel for increasing of the bandwidth and slew rate.
    The results of experimental research that have confirmed the low sensitivity of the parameters of designed integrated circuits created on the field programmable gate array "FGPA-1.3" without the horizontal p-n-p transistors to the influence of gamma-irradiation and electrons with energy of 4 MeV are given.  

    Keywords: operational amplifier, field programmable gate array, voltage follower, sensor, sensing element, radiation resistance.

  • Diagnosis of psychophysiological and emotional state of the human operator

      Various non-invasive assessment of psycho-physiological and emotional state were analyzed: the fractal estimation of speech signals, the analysis of rhythmic EEG patterns and computer stabilometry. The results allowing  prediction of the transition of the individual in a particular state, were obtained and objective criteria for determining the individual personality as a specialist were identified.

    Keywords: Emotuonal speech, EEG pattern, attractor, suggestibility

  • Methods of measurement of small inductors for radio systems on a chip

    Technique for measurement of inductances (L) about 1 nanohenry or less one, is discussed. Two measurements of inductance L are executed. First one is executed for stub length l0, another - for stub length, shortened into N times. Formula for calculation of unknown inductance’ error has been obtained, where determination of unknown L with error closed to meter error has been succeeded by choice of parameters. It is shown that required measurement’s error of initial stub length for N=2 and N=5 is in tens micrometers’ range. Techniques for error’s diminishing have been considered. Estimation for basic stub length of 6,6 mm and 8,3 mm for N=2 and N=5 respectively has been executed. 

    Keywords: inductance, least-squares procedure, meter error, stub base

  • The method of extension operating frequency range of source and emitter voltage follower

    The paper discusses the features of method of extension of circuit’s operating frequency range of the source and the classical emitter voltage follower (VF). The features of this method based on the effect of the mutual compensation of the parasitic impedances are considered. Problem of improving operation speed of VF with output capacitance and reducing the time of establishment of transient at pulsed input voltage are discussed.
    The simulation results of VF in Cadence on model of SiGe integrated transistors are given. This shows that with capacitive load high-frequency cutoff, the time of establishment of transient and the slew rate improved to tens - hundreds of times. 
    The results of investigate complement of methods of improving operation speed of the classical stage with a common drain and common collector.

    Keywords: operating frequency range, source follower, emitter follower, operational speed, broadband amplifier

  • Research building complex level of competitive rail

    One of factors of success in conditions of the market relations are questions of increase of competitiveness that is especially actual for the Russian economy. In turn, Russia, possessing huge natural resources, considerable research and production and personnel potential, has low indicators on quality of life, effective use of resources and competitiveness. The analysis of existing definitions of the category "competitiveness" is provided in article, the hierarchy of levels of competitiveness is presented, the factors influencing competitiveness of construction branch are considered, the algorithm of determination of competitiveness of a construction complex of railway transport is considered.

    Keywords: Competitiveness, construction complex of railway transport, competitiveness factors, assessment rating, competitors

  • RELATIVELY EVALUATION OF THE MAIN MICRO AND MACRO DAMAGES OF BARLEY SEEDS DURING CLEANING AT THE SIEVE MODULES, MADE OF METALL AND POLYMER MATERIALS BASED ON UHMW PE

    Seed damage has a negative impact on the subsequent development of the plant, its yield, and generally on the economic efficiency of grain production. Main percentage of the grains injury occurs in the post-harvest processes, particularly in the grain cleaning. One way of solving this aim is reducing of macro and micro damage of seeds by using   of the   new polymeric materials. Researches have been conducted to reduce the micro and macro of injury barley seeds (feed material) through the use of  new sieves made of polymeric materials UHMW PE  for agricultural machinery.

    Keywords: polymeric materials, micro and macro damage, reducing injury of the seeds

  • Digital proton magnetometer to measure the geomagnetic field

    Digital compact proton magnetometer was created for measure the geomagnetic fields, including the fields of high heterogeneity. We described design of the instrument and its principles of operation. This device is using implemented digital filtering techniques and Prony method to determine the frequency of the desired signal. The experiments were made in the fields of high heterogeneity and demonstrated the possibility of precise measurements in the fields with a gradient of up to 8 mT / m. The device can be used as a metal detector, as well as for magnetic prospecting, geological studies, etc.

    Keywords: nuclear magnetic resonance, free precession, proton magnetometer, geomagnetic field, digital filtering, Prony method