892 research outputs found
Automated system for the creation and replenishment of users' electronic lexicographical resources
This article proposes a solution to improve the efficiency of automated generation of electronic lexicographical resources based on strongly-structured electronic information arrays processing. The developed automated information system for lexicographical resources creation and replenishment have been described is this article. Several supporting subsystems of developed automated system have been characterized. The effectiveness of the information system has been evaluated
Tungsten wire/FeCrAlY matrix turbine blade fabrication study
The objective was to establish a viable FRS monotape technology base to fabricate a complex, advanced turbine blade. All elements of monotape fabrication were addressed. A new process for incorporation of the matrix, including bi-alloy matrices, was developed. Bonding, cleaning, cutting, sizing, and forming parameters were established. These monotapes were then used to fabricate a 48 ply solid JT9D-7F 1st stage turbine blade. Core technology was then developed and first a 12 ply and then a 7 ply shell hollow airfoil was fabricated. As the fabrication technology advanced, additional airfoils incorporated further elements of sophistication, by introducing in sequence bonded root blocks, cross-plying, bi-metallic matrix, tip cap, trailing edge slots, and impingement inserts
Two-step percolation in aggregating systems
The two-step percolation behavior in aggregating systems was studied both
experimentally and by means of Monte Carlo (MC) simulations. In experimental
studies, the electrical conductivity, , of colloidal suspension of
multiwalled carbon nanotubes (CNTs) in decane was measured. The suspension was
submitted to mechanical de-liquoring in a planar filtration-compression
conductometric cell. During de-liquoring, the distance between the measuring
electrodes continuously decreased and the CNT volume fraction
continuously increased (from up to % v/v). The two
percolation thresholds at and can reflect the interpenetration of loose CNT aggregates and
percolation across the compact conducting aggregates, respectively. The MC
computational model accounted for the core-shell structure of conducting
particles or their aggregates, the tendency of a particle for aggregation, the
formation of solvation shells, and the elongated geometry of the conductometric
cell. The MC studies revealed two smoothed percolation transitions in
dependencies that correspond to the percolation through the
shells and cores, respectively. The data demonstrated a noticeable impact of
particle aggregation on anisotropy in electrical conductivity
measured along different directions in the conductometric cell.Comment: 10 pages, 6 figure
Agroecological substantiation of Medicago sativa cultivation technology
Medicago sativa is one of the most productive legumes, which provides high protein
production. Application of the biostimulant and microfertilizers is quite relevant and effective.
Theoretically substantiates and presents ways to solve the scientific problem of formation of
Medicago sativa productivity and the impact on them of seed treatment and foliar nutrition, taking
into account the conditions of the Forest-Steppe right bankof Ukraine. The research was
conducted in the research field of Vinnytsia National Agrarian University in the village of
Agronomichne, Vinnytsia district during 2016–2018. Sinyukha variety was sown (2010). There
has been established that the use of pre-sowing treatment of seeds and crops of Medicago sativa
with biostimulant and microfertilizer improves the conditions of growth and development of the
crop and increases individual productivity. On the researches it is established that fodder
productivity of Medicago sativa sowing is provided by application of biostimulators of growth
and microfertilizers on crops, genetic potential the culture realized as much as possible on the
2nd year of cultivation. The effect of growth stimulants on Medicago sativa productivity was
defined and the optimal combination of macro- and microelements in modern complex fertilizers
was determined, which contributes to the maximum possible yield of Medicago sativa green
mass. New technological regulations for the use of bioorganic preparations and components in
the technological scheme of Medicago sativa cultivation have been developed. It was found that
on average for three years of vegetation of Medicago sativa sown on gray forest soils in the
Forest-Steppe Right Bank, the highest yield of seeds and green mass provides the option of
treatment with biostimulator Saprogum® and microfertilizer Wuxal®. Creating optimal conditions
for mineral nutrition for Medicago sativa plants through the use of bacterial fertilizers and foliar
nutrition contributed not only to the formation of high grain yields, but also significantly
improved biochemical parameters and, consequently, increased crude protein content in grain,
which is important for solving the problem of vegetable protein and balancing the diets of farm
animals. The research results are aimed at solving current problems of technological renewal and
development of agro-industrial complex on the basis of development of bioorganic models of
varietal technology of Medicago sativa cultivation with orientation at the level of adequate arable
productivity and climate fertility
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