Search

The article discusses the features of performing a kinematic analysis of a controlled power mechanism, which additionally implements a force turn mode with a zero radius. The mechanism can be used for transmission of wheeled and caterpillar transport and technological machines. Related mechanisms are mainly used on cars to improve handling, stability, traction and dynamic properties in difficult road conditions, but do not provide a turn with a zero radius. In Russia, such mechanisms are not produced, although theoretical studies are underway, the results of which will make it possible to determine the main parameters of the mechanism and to synthesize its kinematic scheme. The approaches proposed in the article are based on the methods used in the kinematic analysis of planetary gears, however, it is taken into account that the power distribution mechanism during operation has two degrees of freedom. The presence of structural and functional similarity between the vehicle power distribution mechanism and the tracked vehicle turning mechanism is indicated. In one of the modes of operation, the mechanism under consideration functions similarly to the existing ones: due to the controlled sliding in the disk controls, the turning radii pass from infinite (rectilinear) to minimum (calculated). The calculated turning radius is the radius obtained in the absence of slippage in the friction controls of the power distribution mechanism. In the other, a turn is performed in place with a zero radius. When the vehicle is in a straight line, the controls are disabled, the absence of power circulation in the drive axle is ensured, as in traditional transmissions, by the differential, which is part of the mechanism. [ABSTRACT FROM AUTHOR]

The article deals with the problem of statistical processing of poorly structured information about qualitative classification signs on the example of diagnostics in dentistry for specific age categories of patients. A multi-stage technique for processing digitized data, which is a binary weakly structured sequence, developed by the authors, is presented. The problem of estimating the statistical relationship of two binary weakly structured sequences is considered in a general form. A theoretical and practical comparison of the Pearson and Tanimoto coefficients for such sequences is carried out. Criteria estimates are found for practical data obtained at the departments of orthopedic dentistry at Sechenov University, FSBEI HE SOGMA of the Ministry of Health of Russia. A block diagram of an algorithm for expert evaluation of the results of dental diagnostics of patients based on the concordance coefficient is presented. [ABSTRACT FROM AUTHOR]

The purpose of the study is to determine the state and strategic alternatives for the development of the Russian market for aerostats on the basis of marketing research. The work used the methods of primary analysis and systematization of commercial information, SWOT analysis, the method of expert assessments, and determination of the degree of consistency by the Kendall coefficient of concordance. The initial analysis of commercial offers, materials of manufacturers' websites showed that a wide range of lighter-than-air aircraft is presented on the national market for solving various tasks. To assess the strategic prospects of the market, a SWOT analysis was carried out. Its factors were ranked based on peer review. As a result, two most promising strategic alternatives were identified: the use of airships for transporting goods in poorly developed regions of the North of Russia, the use of aerostats as stationary observation posts. In these areas, the competitive advantages of aerostats correspond to the prospects for economic development. The main problem in the development of the Russian aerostat market is overcoming the QWERTY effect (absolute dominance of aircraft heavier than air) in conditions of low investment activity. [ABSTRACT FROM AUTHOR]

The article discusses the relevance of developing an information system for monitoring and analyzing traffic safety based on traffic police data, building a system model, and existing systems and the practice of their use in the world and on the example of the situation in Russian Federation and Russian traffic police data. [ABSTRACT FROM AUTHOR]

Twin oil (20 & 24 inch) and gas (20 & 48 inch) pipeline systems stretching 800 km are being constructed to connect offshore hydrocarbon deposits from the Sakhalin II concession in the North to an LNG plant and oil export terminal in the South of Sakhalin island. The onshore pipeline route follows a regional fault zone and crosses individual active faults at 19 locations. Sakhalin Energy, Design and Construction companies took significant care to ensure the integrity of the pipelines, should large seismic induced ground movements occur during the Operational life of the facilities. Complex investigations including the identification of the active faults, their precise location, their particular displacement values and assessment of the fault kinematics were carried out to provide input data for unique design solutions. Lateral and reverse offset displacements of 5.5 and 4.5 m respectively were determined as the single-event values for the design level earthquake (DLE)—the 1000-year return period event. Within the constraints of a pipeline route largely fixed, the underground pipeline fault crossing design was developed to define the optimum routing which would minimize stresses and strain using linepipe materials which had been ordered prior to the completion of detailed design, and to specify requirements for pipe trenching shape, materials, drainage system, etc. This Paper describes the steps followed to formulate the concept of the special trenches and the analytical characteristics of the Model. [ABSTRACT FROM AUTHOR]