Application features of dynamic memory devices based on binary fiber-optic structures are researched in optimal filters of sequence of pulse signals.
The possibility of significant improvement of signal-to-noise ratio in optimal filters of sequence of pulse signals using non-recirculating binary structures compared to recirculators is proved.
Application of the technical solution based on the method of enhancing identity copies in binary fiber-optic structures allows to achieves the gain in signal-to-noise ratio of about 37 dB for 4096 copies processed, this corresponds to the gain of 22 dB compared to typical recirculator.
Keywords: binary fiber-optic structure, optimal filter, pulse sequence, signal-to-noise ratio
The paper studies the possibility of interaction of acrylamide with aliphatic di-, tri-, tetra- and pentaamines using quantum chemical ab initio modeling. The interest to the preparation of these compounds can only increase since they may serve as feedstock for the production of other useful materials which may find adequate application. The choice of reaction conditions depends on the thermodynamic principles of the process, and for that reason, the paper determines thermodynamic parameters and the logarithms of the equilibrium constants of acrylamide reaction with aliphatic amines in ratio of 1:1 and 2:1 in the gas phase by quantum-chemical method based on density functional theory using a hybrid exchange-correlation of B3LYP functions in the basis of 3 -21G* within 273 ÷ 450 K temperature range and pressure of 0.1 MPa. These calculations served as a base for defining the conditions that must be followed when developing the technology for these compounds, and it was shown that the reaction of their synthesis with high probability of acrylamide - amine reactants ratio of 2:1 should be conducted under relatively mild conditions. Theoretical calculations comply with the experiment, because the interaction of acrylamide with amines at various ratios of reagents and temperatures within 325 ÷ 330 K leads predominantly to the transformation at acrylamide-amine 2:1 reagent ratio, as evidenced by the number of reactive reagents, and frequency analysis of FT-IR, NMR 1H and 13C spectra. Thus, the possibilities of mathematical modeling allow determining the highest probability of spontaneity for a particular reaction, using the method of computer simulation by changing the process temperature (within the model) without performing any technological experiments.
Keywords: Acrylamide, aliphatic amines, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepenta-amine, thermodynamic parameters, Gibbs free energy, isobaric-isothermal potential, equilibrium constant.
In article the main approaches to creation of information structure of a post of diagnosing of the car, providing an optimum combination of the logical conditions solved automatically and non-automatic, raktsionalny distribution of information on types and form representations when developing a method and means of diagnosing are stated
Keywords: diagnosing, post, information structure, model
Ingenuity in the new science is different from the inventive technique that invented intangible tools of knowledge - concepts, principles, laws. Modern inventor of new technology, wanting to maximize their arsenal, serious scientific knowledge, without which the inventors treated wheels, the steam engine and mousetraps .In this regard, the development of the Russian innovation system needs a dramatic increase in research universities. The article deals with examples of scientific discoveries that demonstrate that the knowledge economy promising raw material economy. And in first place in the priorities therefore goes high quality engineering education. In Russia almost no programs for innovative engineering, a course which has been developed by Israeli scientists Clement Levkova and Oleg Figovsky. While it is realized only by the Open University Skolkovo. In particular, this course shows that the development of innovative products is the preparation and implementation of innovative changes and consists of interconnected phases forming a unified whole. The innovation process involves the creation, development and dissemination of innovations. It is a common goal of a certain subject innovation economy. This activity is aimed at implementing the completed research and engineering applications in the form of new or significantly improved and marketable product. Results of innovation are new or modified processes used in practice, as well as associated with these changes, additional research and development. Innovative engineering is based on the systematic, focused and coordinated interaction of all participants in the innovation process at the executive level. However, the implementation of the innovation life cycle stages of technical innovation central figure is an innovative engineer. Innovative engineer carried out the task of building a functional model (structural and functional image) future innovation and its prototype. Without the introduction of this course is difficult to expect a breakthrough in the Russian engineering education.
Keywords: engineering education, innovation process, innovative engineering, innovative engineer.
The paper describes the method for determining the position of the contact wire of electrified railways using microwaves. The method is based on the triangulation system of two georadars and allows to determine a contact wire zigzag and height from the rail head. The proposed method is all-weather with the possibility of continuous monitoring of the overhead contact wire in plan and profile with the opportunity to automate the processing and signaling abnormalities.
Keywords: railroad contact line, contact wire location, GPR, automatic control systems
By self-propagating high-temperature synthesis (SHTS) prepared fine powder оf La2-xSrxNiO4 composition , which is used to obtain dense ceramics exhibiting the properties of n-type semiconductor. Prolonged annealing of the samples resulted in a decrease of the conductivity on the order of 3-4, and the changing nature of the dielectric spectrum: dielectric constant ε' has a stable value of 4·104 Hz in the range of 0,4 − 1·105 Hz .
Keywords: dielectric constant, phase separation, nikelate of strontium lanthanum, self-extending high-temperature synthesis
The authors implemented methodological apparatus homeostatics used to determine the effect of the internal contradictions of the processes of functioning and development of socio-economic systems and management to the survival of the system and its transition to a new stable state.
Keywords: structural and functional stability of the transport and logistics cluster, the cybernetic approach Homeostatics
This paper presented the study of the mechanochemical activation powder mix in dry and liquid grinding media, accompanied by agglomeration of the particles. It Is shown that when agglomerate particles having a bimodal size distribution is forming during the treatment in a dry grinding media and partially (2 wt % ) decaying at grinding by pestle in mortar. The transition to liquid grinding media is leading to a unimodal size distribution and increasing dispersion of the agglomerated particles, characterized by secondary agglomerating when using the alcohol and destruction when using activation in saturated aqueous solution of boric acid. Inherited effect mechanical activation parameters on the compaction process during cold compaction and hot stamping has been determined. Application treated in a high energy mill in an grinding media saturated aqueous H3BO3 Al-Si powder mix results in the formation of moldings with low cold-pressing relative density (0.735) and the activation of the hot stamping compaction (|εh| = 0,592) providing production of hot-deformed powder material with increased mechanical properties.
Keywords: mechanochemical activation, hot-deformed powder material, aluminum, silicon, dispersion, agglomeration
An original mathematical model describing different activities of actors in the vertical marketing system is presented. They are a provider, a agent, a trading enterprise are presented as a controlling subjects. The model is based on the game-theoretical and hierarchical approach. An equilibrium of Germeyer G1 game in terms of sustainable development is established. The method of impulsion is used as a method of hierarchical control to solve this model. The main system operation laws based on numerical experiments are presented.
Keywords: game theory, hierarchical, three-level control system, method of impulsion
The article presents a method of accounting land limits (charges) during the cadastral valuation of agricultural land. This allows us to differentiate the cadastral value , depending of presence of protection zone, water protection zone and on other zones on the lands. Cadastral cost of agricultural land on the example of Leningrad region counted. Determination of cadastral cost on the basic presented coefficients will reduce the land tax on the territory which include restricted mode zones of use. It will increase the objectivity of cadastral evaluation.
Keywords: cadastral evaluation of land, agricultural land, land limits, analytic hierarchy process of T.Saaty
The article discusses issues related to the development of the optimal structure of neural networks. One of the major problems in the synthesis neural conrollers is ensuring optimal number of neurons and connections between layers in the network. Necessary to achieve a compromise between the representational network capabilities, and memory that will be required to store it. The article presents a number of heuristics, allowing to reach such a compromise by limiting the number of connections for each neuron.
This is done through the introduction of two characteristics for the neuron: the radius of the coverage and density of connections. Coverage radius determines the number of neurons that could potentially have a connection to this neuron, and the density of the compound gives the actual number of such compounds. Altogether, these characteristics determine the amount of synaptic connections, which can have a neuron. The article presents the heuristics that allow to define these characteristics depending on the network structure.
Keywords: neural network, neural controller, associative memory, machine learning, optimization
The article discusses the possible causes of pollution of Taganrog Bay of the Azov Sea with oil products for the period 2008-2013. The key factors of pollution were highlighted. Effects of navigation for cotion was evaluated by navigation intensity. Effect of wastewater was evaluated by the number of oil products which fall from municipal drains and wastewater from industrial plants. The data processing of the federal statistical reporting on the influence of the main contamination factors was carried out.
Keywords: oil products, water pollution, average annual concentrations
This paper presents mathematic model of optimization of expenses of stock-piling of timber and logging timber from felling areas to timber consumers by transport networks. This model optimize technological processes which appears during the process of stock-piling of timber and logging timber.
Keywords: log truck, rail transportation in timber processing complex.
The method of laser therapy is based on synchronization of phases of inflow (anacrotism) and outflow of blood (catacrotism) in the field of the pathological center with phases of a being narrowed and extending laser spot on a projection of this pathological center. It is supposed that being narrowed on a projection of the pathological center the spot of laser light stimulates blood inflow to the spot center, and the extending spot of a laser beam – activates blood outflow in the direction from the spot center to its periphery. The developed technique of the automated correction of hemodynamic frustration consists in pilot signal formation (in charge of the power and laser positioning) for the laser machine on the basis of a difference between a reference rheogram and a rheogram of the patient (a body site) in real time.The offered technique has to allow to use more efficiently methods of laser therapy at treatment of violations of a blood-groove. The technique is calculated on the basis of numerical experiment by means of methods of mathematical model operation.In the real experiment the question of synchronization of the reference and measured signal is considered solved though this task represents a subject of separate researches.The received pilot signal can be in real time transformed to the current signal operating positioning and laser power.The method gives the chance of an operating control of a condition of the patient and blood-groove diagnostics to, in time and after a session of laser therapy. Development provides possibility of adaptive individual correction and optimization of parameters of influence during a session and a course of treatment.
Keywords: laser, therapy, technique, rheogram, diagnostics, blood-groove, management, signal
The report discusses the methods to improve the performance of the server software dispatch center. Asynchronous operations are considered in detail, as the most effective method of increasing the performance of the dispatch center, which is most of the time working with input-output operations. The results were tested on a real project of the dispatch center of high-precision positioning of objects.
Keywords: software dispatch center, methods to improve the productivity, asynchronous operations