Smoothing of sections of contours of glove parts using parametric B-spline and interpolation spline

Develop software for smoothing contour sections of glove parts using parametric B-spline and interpolation spline

Statistical Description of Hydrodynamic Processes in Ionic Melts with taking into account Polarization Effects

Statistical description of hydrodynamic processes for ionic melts is proposed with taking into account polarization effects caused by the deformation of external ionic shells. This description is carried out by means of the Zubarev nonequilibrium statistical operator method, appropriate for investigations of both strong and weak nonequilibrium processes. The nonequilibrium statistical operator and the generalized hydrodynamic equations that take into account polarization processes are received for ionic-polarization model of ionic molten salts when the nonequilibrium averaged values of densities of ions number, their momentum, dipole momentum and total energy are chosen for the reduced description parameters. A spectrum of collective excitations is investigated within the viscoelastic approximation for ion-polarization model of ionic melts.Comment: 24 pages, RevTex4.1-format, no figure

Strain-induced kinetics of intergrain defects as the mechanism of slow dynamics in the nonlinear resonant response of humid sandstone bars

A closed-form description is proposed to explain nonlinear and slow dynamics effects exhibited by sandstone bars in longitudinal resonance experiments. Along with the fast subsystem of longitudinal nonlinear displacements we examine the strain-dependent slow subsystem of broken intergrain and interlamina cohesive bonds. We show that even the simplest but phenomenologically correct modelling of their mutual feedback elucidates the main experimental findings typical for forced longitudinal oscillations of sandstone bars, namely, (i) hysteretic behavior of a resonance curve on both its up- and down-slopes, (ii) linear softening of resonant frequency with increase of driving level, and (iii) gradual recovery (increase) of resonant frequency at low dynamical strains after the sample was conditioned by high strains. In order to reproduce the highly nonlinear elastic features of sandstone grained structure a realistic non-perturbative form of strain potential energy was adopted. In our theory slow dynamics associated with the experimentally observed memory of peak strain history is attributed to strain-induced kinetic changes in concentration of ruptured inter-grain and inter-lamina cohesive bonds causing a net hysteretic effect on the elastic Young's modulus. Finally, we explain how enhancement of hysteretic phenomena originates from an increase in equilibrium concentration of ruptured cohesive bonds that are due to water saturation.Comment: 5 pages, 3 figure

Optimizing the movement of the cutting tool in automatic cutting with water jet or laser beam

The purpose of automated cutting of materials is to reduce material costs, shorten cutting times and increase the quality of products. Development of algorithms and a software product for optimizing the movement of a cutting tool during automatic cutting using a water jet or a laser beam

Algorithm for finding rotation angles α and β, respectively, for stationary and moving flat geometric objects when constructing dense stacks of these objects

Rational and economic spending of material and energy resources, as well as protection of the environment from pollution have always been and are priority directions in the development of Ukraine. And for this, it is necessary to reduce the amount of waste. Thus, materials make up more than 80% of the cost of shoes, and the technological features of shoe production lead to the fact that only the waste of cutting shoe materials makes up more than 20%, so the importance of rational use of materials is obvious. Development of algorithms and a software product for the design of dense lattice stacks for two types

Construction of lattice packings of two flat geometric objects with different configuration of the external contour

The method of construction of the latticed piling for two plane geometric objects with different configuration of outer contours and search is in-process examined the densest from the possible latticed piling for these objects. To do this, the mathematical formulation of the problem, highlighted the structural components of the problem and given their analytical description. Analytical expression is got for a goal function and the method of her optimization is offered. The proposed method of construction of lattice packing’s has been implemented in a software product for the automatic construction of lattice packing’s for two planar geometries with a different configuration of the outer contour and the search of the densest lattice packing’s permissible for these objects

Стационарный циркониевый анализатор кислорода в дымовых газах

Розглянуто проблему оптимального використання вуглеводного палива шляхом підвищення коефіцієнта корисної дії теплових агрегатів. Описано математичну модель, особливості розробки та експлуатації вітчизняного газоаналізатора 151ЭХ02.The problem of optimum use carbogydrate of fuel by increase of coefficient of efficiency of thermal aggregate (CE) is considered. The mathematical model, feature of development and operation of domestic analyzer of gas 151EC02 is described.Рассмотрена проблема оптимального использования углеводородного топлива путем повышения коэффициента полезного действия тепловых агрегатов. Описана математическая модель, особенности разработки и эксплуатации отечественного газоанализатора кислорода 151ЭХ02

Содержание масла в семенах нута Национальной коллекции Украины

Chickpea (Cicer arietinum L.) is an important legume crop grown and consumed worldwide. Oil content in chickpea seeds ranges from 4 % to 7 % according to various data sources. Considering the interest of breeders in this issue, as well as for the purpose of inventory of the presented chickpea genetic material in the collection of the National Center for Plant Genetic Resources of Ukraine, these studies were carried out. Field experiments were carried out in 2016-2018 in the scientific crop rotation of the Plant Production Institute n.a. V. Ya. Yuriev of NAAS (Kharkiv, Ukraine). 43 samples (21 - kabuli type and 22 - desi type) of different ecological and geographical origin were studied. Oil content in chickpea seeds was determined using gravimetric method of S. V. Rushkovsky (Yermakov, 1987) in the laboratory for genetics, biotechnology and quality of the Plant Production Institute n.a. V. Ya. Yuriev of NAAS. On average, over the years of study, in the kabuli type accessions, the oil content level in the seeds made 7.08 %; for accessions - 6.05 %. The range of variability of this trait for the kabuli chickpea ranged from 5.22 % to 8.69 %, and for desi - from 4.40 % to 7.26 %. A low variability of the studied trait was noted for both the kabuli (V = 6.88-15.04 %) and for desi (V = 8.98-14.15%) chickpea cultivars. The advantage in terms of oil content in seeds, regardless of the growing conditions, was retained for the kabuli type. The accessions with the maximum level of the “oil content in seeds” trait manifestation were selected as “reference” for each type: for kabuli - variety Pamyat (Ukraine) - 7.95 %, for desi - Yarina (Ukraine) - 7.13 %. The best oil-bearing chickpea samples can be used in specialized programs to create new genotypes with a higher oil content in seeds.Нут (Cicer arietinum L.) является важной зернобобовой культурой, которую выращивают и потребляют во всем мире. Содержание масла в семенах нута по различным данным колеблется от 4 до 7 %. Учитывая интерес к данному вопросу со стороны селекционеров, а также с целью инвентаризации представленного генетического материала нута в коллекции Национального центра генетических ресурсов растений Украины были проведены настоящие исследования. Полевые опыты были проведены в 2016–2018 гг. в научном севообороте Института растениеводства им. В.Я. Юрьева (Харьков, Украина). Исследовали 43 образца (21 тип kabuli и 22 типа – desi) разного эколого-географического происхождения. Содержания масла в семенах нута определяли гравиметрическим методом С.В. Рушковского (Ермаков, 1987) в лаборатории генетики, биотехнологии и качества Институра растениеводства им. В.Я. Юрьева НААН. В среднем за годы изучения у образцов морфотипа kabuli содержание масла в семенах составило 7,08 %; у образцов типа desi – 6,05 %. Диапазон изменчивости данного признака для морфотипа kabuli колебался от 5,22 до 8,69 %, а у desi – от 4,40 до 7,26 %. Отмечена невысокая вариативность изучаемого признака как для морфотипа kabuli (V = 6,88–15,04 %), так и для desi (V = 8,98–14,15 %). Преимущество по содержанию масла в семенах, независимо от условий вегетации, сохранялось за морфотипом kabuli. В качестве «эталонных» для каждого из морфотипов выделены образцы с максимальным уровнем проявления признака «содержанием масла в семенах»: для морфотипа kabuli – сорт Память (Украина) – 7,95 %, для desi – сорт Ярина (Украина) – 7,13 %. Лучшие по масличности образцы нута могут быть использованы в специализированных программах для согдания новых генотипов с повышенным содержанием жира в семенах