One of the most important technological aims is to obtain a fiber concrete with uniform (aggregate) distribution of the fibers by volume of concrete, from which depend essentially on the constructive and performance attributes of fiber concrete. Authors proposed pipeline technology of preparation of fiber concrete with aggregate distribution of the fibers, also they studied changes in its structural characteristics, and developed estimated recommendations for the evaluation of its strength and deformability characteristics and strain diagrams in compression and tension  

Keywords: fiber concrete with aggregate distribution of fibers, strength and deformability characteristics, deformation diagrams

The flight scheduling process is briefly described in the article. It is one of the most important stages of space flight control task solution. Three stages of flight scheduling are given: strategic, tactical and executive. The result of each scheduling phase is presented by special plan type: on-orbit operation summary, weekly lookahead plan, short-term plan. The difference of these plan types is in planning interval and data processing depth. The mathematical modeling of all required data and restrictions is made. A crew downtime minimization is the selected optimization criterion. Modified genetic algorithm for decision of assigned task is designed. The future tasks regarding crew activities scheduling process optimization are defined  

Keywords: scheduling, flight operation, crew activities, optimization, mathematical modeling, genetic algorithm

With the increase in the coefficient of friction is a growth of the torque transmitted by the lead pair of friction of the main friction, reducing torque is transmitted by the slave pairs of friction friction core group and a couple of extra friction of the friction. Load transfer in the adaptive friction clutches reduces spacer force and accelerate the growth of the torque transmitted by the friction pair of the main driving frictional group.

Keywords: the coefficient gain, a separate positive connection, the coefficient of friction, clutch, friction pair

The coefficient of friction, whereby the total nominal load adaptive clutch transmitted only the leading pair of friction friction basic group is less than the maximum value, which may take the coefficient of friction in actual operation of the coupling. Appearance and an increase in the strength of the spacer when the external load and increasing at an elevated value of the friction coefficient begins at a certain minimum value of the external load, which depends on the total number of pairs of friction of the friction core and the gain. The dependences of the distributions of the torque between the lead pair of friction friction main group and driven friction pairs of basic friction and friction pair of extra friction.  

Keywords: the coefficient gain, a separate positive connection, the coefficient of friction, clutch, friction pair

The proposed method of designing hardware components optical switching systems simplifies prototyping and development of systems of optical switching and multi-core VLSI. This method allows to automatically set parameters of the optical system at the design stage, depending on the requirements. This method may be cost-effective at the stage of technical specifications of the project, as will reduce the time required for its coordination between the customer and the design engineer.
At the heart of developing a method of designing systems, optical switching elements is a comprehensive analysis of the equations and functions describing the electrical and optical properties of laser heterostructures, as well as electro-optic modulators and Fabry-Perrot resonators. Fundamental static and dynamic characteristics of semiconductor diode lasers can be calculated by using a set of kinetic equations describing the interaction of electrons, holes and photons in the active layer of the laser structure. At various stages of this method is processing, evaluation and calculation of the main characteristics of the elements of integrated optical switching systems.  

Keywords: optical switching, integrated injection laser, quantum-scale heterostructure, amplitude modulation, terahertz range

In the article a double-gap cavity with anti-phase excitation that has wide application in designs of floating-drift klystrons is considered. One of the ways of reduction of time during machine design of klystron’s cavity is using of the simple analytical expression, allowing to determine the main klystron electrodynamic parameters with a sufficient accuracy for practice. In the article we presented the results of physical and mathematical modeling of the double-gap cavity, the corrected mathematical models were introduced that can be utilized in programs of a prompt optimization of klystron's type devices. The technique of creation of approximate mathematical model in this case was reduced to definition of basic analytical function, and the subsequent approximation between experimental and calculated data by means of a method of planned experiment. In presented work the analysis of adequacy was carry out. Analysis revealed inaccuracy of a resonance frequency of an anti-phase type in chosen ranges of change of influencing factors doesn’t exceed 1%, characteristic impedance- 5%. The received analytical ratios allow carrying out quickly calculation of parameters of the cavity, without labor-consuming and expensive experiments and calculations.

Keywords: double-gap cavity, electrodynamic parameters, mathematical simulation, resonance frequency, characteristic impedance, method of planned experiment

In this work we have investigated the structure of individual single-walled and multi-walled carbon nanotubes by high-resolution electron microscopy and electron diffraction. To grow carbon nanotubes we used a catalytic chemical vapor deposition method. It was shown, that this synthesis protocol gave in general single-walled and double-walled carbon nanotubes with a high level of crystallinity. The diameters of the nanotubes were in the range 1.5 - 7 nm. We also observed that there was a certain level of amorphous carbon deposited on the nanotube surface during the growth. In this work we also present the structure analysis of the double-walled carbon nanotube by means of electron diffraction. We show that the structural date derived from electron microscopy and electron diffraction agree within the experimental error.

Keywords: Carbon nanotubes, electron diffraction, electron microscopy

The atricle considers the problem of finding the best carrier. It describes by the expert method of solving the problem, as well as an algorithm for selecting a carrier. Describes a software module implemented with the involvement of technology ActiveX, which greatly simplifies the process and reduces the development time of projects. The proposed application allows you to define a list of the best carriers, ranked by rating according to the user's request.

Keywords: Carrier selection, expert method, weighting coefficient, rank, user application

The construction of moving part suspension of electrical-type measuring instrument was considered as well as analyses of its functioning was realized. The theoretical foundation of mathematical model construction of moving part suspension which describes the behavior of system, was set.  

Keywords: moving part, taut band, beam, graph, matrix, incidence matrix, simulation, equation

We consider the technical systems at the operational stage of the process and study their possible development. The generalized law of the development of technical systems as a function of its components can form the main factors influencing the evolution of the technical system and the process of their modernization.

Keywords: the evolution of the network, structure, system, process, modification, chains, model development, dependence

A method of expanding the bandwidth and improve the performance of the differential voltage divider – attenuator (AT), which have parasitic capacitance on the outputs C01, C02. Wide range of transmission of the AT provided by introducing a compensation circuit C01, C02, which is achieving data quality indicators. Simulation results of desired are shown.

Keywords: a resistive voltage divider, differential attenuator, the parasitic сapacitance load, speed, upper frequency limit, analog-to-digital converters.

In article the description of models of adaptive management outlining the content electronic courses. Model based on the analysis of factor run content element and the factor of time interacting with the content element CEMA (classifiers events - management analyzer) for calculating an objective indicator of course studying result of user to send a learning management system (LMS). A model of the DCG (dynamic content generation) to localize errors in the develop electronic courses and to the human factor in learning process. Proposed criteria and shown one model implementation AMLM (adaptive management e-learning materials). Results of the study found use in educational institutions and commercial enterprises involved in the introduction of new technologies and improve efficiency in e-learning. Organizations interested in the development of services provided by e-learning and stimulating economic benefits will find helpful many aspects of this work for planning strategies for education and training of personnel companies-customers, students and the public. 

Keywords: education, e-learning, Learning Management System, electronic learning course, models of adaptive management outlining of content

Main disadvantages of a dark image are considered. Alternative algorithm of improving dark images is proposed.

Keywords: Preliminary processing, digital image analysis, digital image improvement, Gaussian noise, dark images.

The monitoring system of process of stabilization of levels of metal on continuous moulding of preparations machine, constructed useing the observer of a condition is considered. The developed nonlinear observer allows to increase the accuracy of an assessment of levels of the melted metal in the ladle with steel ,industrial ladle and crystallizers, and also makes continuous diagnostics of a condition of glasses of latches. The analysis made on the basis of linearized model, showed the observability and controllability of system on all interval of pouring.

Keywords: Machine of continuous moulding preparations,the controllability, the observability, the observer of a condition, the level of metal

There is considered the problem of structuring indicators of the quality of information-computing systems, including transport. For each quality indicator is determined by the number of corresponding criteria. An algorithm for analysis of subscriber delays.

Keywords: quality, indicator of quality, quality criterion, computer information system of railway transport,subscriber delay