No abstract
A framework for porous media topology reconstruction from petrographic thin sections for clastic rocks is proposed. The framework is based on two sequential stages: segmentation of thin sections imagesinto grains, porous media, cement (with further mineralogical classification of segmented elements) and reconstructing a three-dimensional voxel model of rock at pore scale. The framework exploits machine learning algorithms in order to segment2D thin section images, perform structural and mineralogical classification of grains, cement, pore space, and reconstruct 3D models of porous media. Segmentation of petrographic thin section images and mineral classification of the segmented objects are performed by the means of combination of image processing methods and Convolutional Neural Networks (CNNs). The 3D porous media reconstruction is done by means of the Generative Adversarial Networks (GANs) are applied to the segmented and classified 2D images of thin sections. As the criteria of the reconstruction quality, the following metrics were numerically calculated and compared for original and reconstructed synthetic 3D models of porous rocks: Minkowski functionals (porosity, surface area, mean breadth, Euler characteristic) and absolute permeability. Absolute permeability was calculated using pore network model. The 3D reconstruction framework was tested on a set of thin sections and CT tomograms of the clastic samples from the Achimovskiy formation (Western Siberia). The results showed the validity of the goodness-of-fit metrics based on Minkowski functionals for reconstruction the topology of porous media. The combined usage of CNN and GAN allowed to create a robust 3D topology reconstruction framework. The calculated poroperm characteristics are correlated with laboratory measurements of porosity and permeability. The developed algorithms of automatic feature extraction from petrographic thin sections and 3D reconstruction based on these features allow to achieve the following goals. First is the reduction of the amount of the routine work done by an expert during petrographic analysis. Second leads to the reduction of the number of expensive and time-consuming CT scannings required for each physical sample in order to perform further absolute and relative permeability calculations. The proposed method can bring the petrographic thin section and CT data analysis to a new level and significantly change traditional core experiments workflow in terms of speed, data integration and rock sample preparation.
One of the main problems of the Far East of Russia is a tendency of long-term reduction of the population of the region. While maintaining natural loss, there is an outflow of labor resources in the central part of Russia. In this situation, it is advisable to refer to a historical experience of state policy on replenishing the region with labor. The paper focuses on a comprehensive study of the activities of government agencies on the implementation of agricultural family relocation policies from the central part of Russia to the Far East. The reasons for family relocations, contributing to an increase in the population of the region, are substantiated. Some features of the organization of the process of resettlement and adaptation of the families of agricultural migrants in the 20s and 30s of the 20th century are considered. The findings on the economic and social-legal regulation of family relocations in the 20s and 30s of the 20th century can be used in the development of federal and regional programs to consolidate the population in the Far East of the country.
To obtain high-quality pipes, it is necessary to minimize the transverse diversity. To do this, experts create new calibrations of the mill rolls for longitudinal rolling with a short mandrel (automatic, in particular tandem). This work is devoted to improving the shape of the rolls that form the caliber. Another concept of choosing the shape of the fillet successfully has tested in the design of two-roll round calibers with round releases. In this concept it was assumed a smooth connection of the fillet only with the release. The use of the proposed shape in the mill of longitudinal rolling allows to limit the possibility of metal pipe's flow during deformation into the gap between the rolls and, accordingly, to reduce the transverse diversity of the pipe. A method for calculating the geometric parameters of the caliber with a new shape has been developed. New calibration of rolls for longitudinally rolling mills with round caliber and round shape was successfully tested at the rolling mill 140 of OJSC "Interpipe Nico Tube".
Информация о статьеДата поступления 23 января 2017 г. Дата принятия в печать 25 мая 2018 г. Дата онлайн-размещения 18 июня 2018 г. Ключевые словаОпьянение; алкоголь; транспортное средство; дорожно-транспортное происшествие; расследование; медицинское освидетельствование; химико-токсикологическое исследование; биологические жидкости; медицинская организация Аннотация. Среди явлений, присущих современной цивилизации, алкоголизм и наркомания занимают особое место, поскольку отрицательно влияют на все сферы жизни общества. Одним из наиболее опасных видов преступлений, совершенных в состоянии опьянения, являются дорожно-транспортные преступления. Негативная динамика указанной категории преступлений обусловливает необходимость их эффективного расследования, успех которого во многом зависит от правильного применения мер государственного принуждения, направленных на установление состояния опьянения лица, управляющего транспортным средством. Особое значение при этом имеют меры административного, административно-процессуального и уголовно-процессуального принуждения. В статье проводится системный анализ норм уголовного и административного права, уголовного и административного процесса, определяющих порядок освидетельствования на состояние опьянения и медицинского освидетельствования на состояние опьянения. Также рассматриваются вопросы назначения и производства судебных экспертиз, направленных на установление состояния опьянения, порядок получения биологических образцов для исследования. Анализируется судебная практика в сфере как административной юрисдикции, так и уголовного судопроизводства. Авторы приходят к выводу о том, что порядок проведения медицинского освидетельствования лица, управляющего транспортным средством, нуждается в совершенствовании. Основные проблемы, возникающие при этом, обусловлены правовой неопределенностью выбора медицинского учреждения, в котором должны осуществляться химикотоксикологические исследования биологических жидкостей. Кроме того, законом не предусмотрено производство подтверждающих исследований биологических образцов на предмет выявления наркотических средств и психотропных веществ, в случае если получены отрицательные результаты предварительных исследований, которые зачастую не обнаруживают некоторые разновидности наркотических средств, в частности спайсы. Для выявления состояния опьянения необходимо производство освидетельствования в порядке, предусмотренном уголовно-процессуальным законодательством, которое должно сопровождаться получением биологических образцов для исследования с целью дальнейшего назначения судебной химико-токсикологической экспертизы.Abstract. Alcohol and drug abuse hold a special place among the phenomena accompanying the modern civilization because they have a negative impact on all aspects of society. One of the most dangerous types of crimes committed under the influence is road traffic accidents. The negative trend of this category of crimes necessitates their efficient investigation, the success of which greatly depends on the right measures of legal coercio...
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