Pulse load on a stationary barrier during an explosion in water

С использованием экспериментальных данных о взрывах в воде найдена аналитическая зависимость распределения удельного импульса взрывной нагрузки по длине балки. Учтены эффекты отражения возмущенного потока воды от поверхности преграды, глубина ее расположения в водоёме, взаимное расположение сферического заряда ВВ и преграды в воде, физические характеристики заряда. Using experimental data on explosions in water, an analytical dependence of the distribution of the specific impulse of the explosive load along the length of the beam is found. The effects of reflection of the disturbed water flow from the barrier surface, the depth of its location in the reservoir, the mutual location of the spherical explosive charge and the barrier in the water, the physical characteristics of the charge are taken into account.

Results of experimental studies of the mutual influence of tenometric sensors on the plane elements of the road machine design

Analysis of the use of road vehicles in recent years shows an increasing trend continuous mode of their operation. In these circumstances, it is important to know the current technical status condition of the road machine. To a large extent, this is determined by the reliability of the measurement information about dynamic loads on the structural elements of a road machine. In order to increase the accuracy and reliability of dynamic measurements of loads, the authors conducted a number of experimental studies. Experimental studies of the mutual influence of strain gauges on the errors of dynamic load measurements on the structure of the road machine were carried out using a model of the planar element of the structure of the road machine. A computerized four-channel spatially distributed measurement information system was used in the experimental studies. Research results are presented mutual influence of strain gauges under various static and dynamic loads. It is established that due to the action of inertia forces and acceleration, the interaction between the sensors is manifested to a greater extent. Using the methods of comparison, comparison and complex analysis of the results of experimental studies, the dependences of the errors of dynamic load measurements on the angle of action and load removal were established. According to the results of research, the functions of dependence of dynamic loads on the direction and force of action on each of the 4 strain gauges, taking into account their mutual location, are obtained. It is shown that the experimentally obtained coefficient of the interconnection of strain gauges depends on both the mutual location of the sensors and the spatial direction of the force and has a nonlinear dependence. The experimentally determined error function between the four strain gauges was 3%. The reason for the increase in measurement errors of dynamic planar loads is the displacement of the operating point upwards by the transformation function at positive load, or downwards at negative load. The magnitude of the displacement depends on both the magnitude of the load and its removal.The results obtained will allow optimizing the placement and number of strain gauges on board Measuring Information System on the structure of of the road machine. As a result, the accuracy and reliability of measuring the parameters of the dynamic loads of the road machine will significantly increase.

Deep Learning Insights into Lanthanides Complexation Chemistry

Modern structure–property models are widely used in chemistry; however, in many cases, they are still a kind of a “black box” where there is no clear path from molecule structure to target property. Here we present an example of deep learning usage not only to build a model but also to determine key structural fragments of ligands influencing metal complexation. We have a series of chemically similar lanthanide ions, and we have collected data on complexes’ stability, built models, predicting stability constants and decoded the models to obtain key fragments responsible for complexation efficiency. The results are in good correlation with the experimental ones, as well as modern theories of complexation. It was shown that the main influence on the constants had a mutual location of the binding centers.

About methodology of identification of rural settlements with using the available information about them in documents and cartographic materials of the 16th–19th centuries (on the examples rural of Ruzsky District of Moscow Province)

The research presented in this article is devoted to solving the problem of searching for information about rural in the materials of the 16th-19th centuries when performing historical, genealogical, local history and similar studies, which arise as a result of the instability in time of their names and changes in the places where information about them is stored. The study found that initially this problem (the problem of identification) was solved by specifying various features for rural in documents in addition to their names, and later — in addition to this, by drawing up drawings and plans depicting the mutual location of rural and surrounding terrain objects, however, the systematization of these features and methods of their use, suitable for use in the preparation of algorithms for the functioning of modern geoinformation systems has not been developed so far. We present in this article the work is done using information about the rural of Ruzsky district, Moscow province contained in the historical documents of 16th–19th centuries and a synthesis of their literature (Cadastre, Census, Metric, Boundary, Sentinel, Accountant, Income, Domashnih and Quitrent books, as well as in the Confessional statements), and on cartographic materials of the 17th–19th centuries (drawings, plans, maps and one diagram), on the basis of which criteria identification of rural and the methodology of its implementation. In the course of the work, the systematization of the factual material and its presentation in tabular form, suitable both for the purposes of the presented research, and for use by other specialists working in related fields of science and practice. The approbation of the proposed method, the evaluation of its effectiveness and the results obtained in the course of this work showed the possibility of applying the results of the presented work for practical use.

RESEARCH INFLUENCE OF TECHNOLOGICAL DOWNLOADING ON MOTION PARAMETERS OF VIDRATION SEPARATOR

In the article research of influence of the technological loading is presented on stabilizing of the oscillating system. An oscillation separator is examined as an oscillating system that carries out force vibrations under the action of revolting force. By the feature of oscillation technological machines, such as oscillation separators, there is substantial influence of the technological loading that causes both quantitative and quality changes of motion of executive branch. In this case a concept of the added mass is unacceptable. The known researches do not decide the problem of the uneven specific loading of working surface of sieve in a complete measure. The growing productivity of modern separators envisages the increase of loading of working surface of vibrosieves. The process of vibrosieve separation is very sensible to the increase of loading, brings a division over to the decline of quality, needs more intensive office hours. The size of the initial specific loading substantially influences on the mutual location of areas of overload and underloading of working surface. The process of sifting becomes complicated at presence of areas of overload that results in the increase of thickness of layer and compression of mixture. Appearance of areas of underloading results in reduction of the use to the area of working surface. There is a decline of efficiency of process in these cases. For oscillation separators working in far superresonance modes at the comparatively small size of the technological loading influence of him is small felt. For resonant separators the insignificant sizes of the technological loading on an executive branch resulted in the substantial changes of parameters of his motion. For confirmation of this influence on the parameters of motion of executive branch special studies of oscillation separator were undertaken with the combined occasion. On the basis of results of researches of influence of the technological loading on the parameters of motion of oscillation technological machine drawn conclusion in relation to expediency of the use of the combined causative vibroagent for stabilizing system.

The spatial planning of industrial areas in an urbanized area for cargo, in the development of inland waterway transport

Spatial planning, taking into account the configuration of the surface, i.e. its shape (relief) and the presence and mutual location of objects and points of characteristic water ports, is a derivative of several natural, economic, market, technical, social and political factors. It depends on the destination port, the planned structure of trade in cargo, the forecasted traffic of ships, passageways, the technology of reloading used, as well as on the anticipated demand for the development of shipping and trade by sea and inland waterway. The article analyzes the transport accessibility of the Port of Gdynia through the construction of a dock to determine the proposals for improving the conditions of transported cargo.

CALCULATION OF OPTIMAL INJECTION RATE FOR DISPERSED WATERFLOODING SYSTEM

The article presents a description of the settlement method of necessary injection rates calculation, which is depended on the injected water migration into the surrounding wells and their mutual location. On the basis of the settlement method the targeted program of geological and technical measures for regulating the work of the injection well stock was created and implemented by the example of the BV7 formation of the Uzhno-Vyintoiskoe oil field.