Создание повторно используемых моделей для прогнозирования технологических данных с использованием средств интеллектуального анализа

Большинство предприятий, занятых в сфере добычи нефти и газа, используют автоматизированные системы для мониторинга состояния оборудования. Процесс мониторинга может создавать большие объёмы данных. Поскольку эти данные потенциально могут содержать ценные с точки зрения улучшения технологического процесса знания, требуется их анализ. Ввиду сложности создания и поддержания моделей прогнозирования на основе таких данные, требуется использование методов для создания моделей, которые могут быть использованы повторно. В данной работе предлагается технология, представляющая собой последовательность шагов по созданию переиспользуемых моделей интеллектуального анализа данных нефтегазового оборудования

Polymeric Layers for Optical Structures with Controllable Waveguide Parameters

Anisotropic planar waveguides based on a liquid crystal monomer with principal refractive indices

Relaxation-induced stabilisation of optical pulsed vortex beams in media with a composite cubic-quintic nonlinearity

The problem of the generation of stable (quasi-stable) 3+1D light bullets in nonlinear media is addressed. We consider a medium with a two-component relaxing cubic nonlinearity, and non-relaxing quintic one. It is shown that a special adjustment of the pulse duration and the parameters of the two-component relaxing nonlinearity enables one not only to suppress distortions of the temporal pulse envelope and self-induced frequency shift, but to suppress a destructive effect of the azimuthal instability of vortex pulsed beams as well

Risk Assessment of Land Degradation Using Satellite Imagery and Geospatial Modelling in Ukraine

In this publication, the authors considered the effect of unprecedented human activity into land degradation and desertification processes in Ukraine. The land degradation mapping technique based on processing of a two-level model for multispectral satellite imagery of low and medium spatial resolution was described. This technique was used to investigate land degradation and desertification within relatively pristine and human-inspired mining and industrial landscapes located in the central, southern, and eastern parts of Ukraine. In each particular case, the authors offered thematic land degradation maps obtained as a result of multispectral images processing, allowed assessing the state and tendencies in land degradation processes within the study areas. Data obtained visually emphasize the level of anthropogenic stress, impact of long-term change of vegetation cover, and correlation of intensive development of mining, construction, agricultural and other human activities with high level of land degradation within investigated areas. The transition to adaptive farming systems implies the achievement of maximum compatibility between soil and plant, development of crop rotation, soil conservation tillage system. Conducted research on the creation of adaptive systems of crop production takes into account the environmental, landscape and geochemical peculiarities of the steppe zone of Ukraine, to get the production of environmentally safe agricultural products. They can be used in further studies of a differentiated approach to achieving a balanced potential of agricultural landscapes. Remote detecting of degradation and desertification processes intensification at early stages will be able to promote further measures for improving the territories conditions. The further research has to be directed on development of geoinformation technologies for landscape changes remote mapping

Features of pulsed synchronization of a systems with a tree-dimensional phase space

Features of synchronization picture in the system with the limit cycle embedded in a three-dimensional phase space are considered. By the example of Ressler system and Dmitriev - Kislov generator under the action of a periodic sequence of delta - function it is shown, that synchronization picture significantly depends on the direction of pulse action. Features of synchronization tons appeared in these models are observed.Comment: 16 pages, 11 figure

Numerical And Experimental Study Of Multi-Point Forming Of Thick Double-Curvature Plates From Aluminum Alloy 7075

The paper describes various rod type work tools intended for forming parts and their design peculiarities and technological processes they are used in. We present the device for multi-point forming thick double-curvature plates with the use of reconfigurable core punch and die in large temperature and speed range. The results of finite element modeling of forming and machining process are demonstrated. It is revealed that heating the work piece results in pressing of the rod into the work piece in the areas of maximum pressure. The depth of pressing depends on mechanical behavior of the material at forming temperature and force to forming rods. The paper presents the results of experiments on developing of multi-point forming plates

Fabrication and properties of L-arginine-doped PCL electrospun composite scaffolds

The article describes fabrication and properties of composite fibrous scaffolds obtained by electrospinning of the solution of poly({\epsilon}-caprolactone) and arginine in common solvent. The influence of arginine content on structure, mechanical, surface and biological properties of the scaffolds was investigated. It was found that with an increase of arginine concentration diameter of the scaffold fibers was reduced, which was accompanied by an increase of scaffold strength and Young modulus. It was demonstrated that porosity and water contact angle of the scaffold are independent from arginine content. The best cell adhesion and viability was shown on scaffolds with arginine concentration from 0.5 to 1 % wt

Photoinduced Absorption in Bismuth Titanate Crystals on Nano- and Picosecond Excitation

The peculiarities in the induced absorption of bismuth titanate (Bi12TiO20) crystals upon their irradiation by high intensity nano and picosecond pulses with a wave length of 532 nm have been studied. The relationship between the photochromic effect and radiation intensity at the fixed radiation dose in con ditions of pulsed laser excitation has been established. A threshold character of the relationship between the photochromic effect and intensity has been found for the first time. A phenomenological model making it possible to explain qualitatively the dynamics of the trapping level population process has been proposed