179 research outputs found

    System engineering as a tool for the implementation of engineering projects

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    Модель вимірів параметрів стабілізації висіння гелікоптера відносно точкових об'єктів

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    Here we explain measuring model of helicopter's hovering stabilization parameters againstpoint object that requires smaller volume of calculation and preserves high speed and accuracy ofstabilization. Also we investigate reduction of number of state vectors and volume of calculation viausage of extended Kalman filter and standard sensorsОбоснована модель измерений параметров стабилизации висения вертолета относительно точечных объектов, которая требует меньшего объема вычислений и сохраняет высокую скорость и точность стабилизации. Исследована возможность сокращения векторов состояния и измерений за счет использования расширенного фильтра Калмана и штатных измерителейОбґрунтовано модель вимірів параметрів стабілізації висіння гелікоптера відносно точкових об’єктів, яка вимагає меншого обсягу обчислень і зберігає високу швидкість і точність стабілізації. Досліджено можливість скорочення векторів стану та вимірювань за рахунок використання розширеного фільтра Калмана та штатних вимірювачі

    Influence of convective flow on the growth of pure and alloyed dendrite

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    The paper presents the model of anisotropic growth of dendritic crystallization of chemically pure and binary liquid (solution or melt) based on forced convection of the liquid phase. The dependencies of the growth rate and the radius of the top of a dendrite from under-cooling fluid in cases of a chemically pure material and alloys are presented. A comparative analysis of the influence of forced convection on the dendrite growth kinetics is carried out. Evaluation of growth rate and morphology of dendrite by high-speed crystal growth model was done. The contribution of convective flow and the anisotropic properties of the liquid-crystal boundary were taking into account. The model is also used hyperbolic diffusion equation to describe the non-equilibrium impurity capture by crystal surface, which occurs under the rapid crystals growth

    Features of Big Data technology in human resource management

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    В данной статье рассмотрена значимость применения технологии Big Data в инновационных стратегий управления, технологий и методов управления людьми в профессиональной деятельности в условиях цифрового общества, проанализированы перспективы применения данной технологии для менеджмента, в том числе и для системы образования. Показаны возможности применения технологий Big Data для современных технологий и методов управления в условиях современного рынка. This article discusses the importance of using Big Data technology in innovative management strategies, technologies and methods of managing people in professional activities in a digital society, and analyzes the prospects for using this technology for management, including for the education system. The possibilities of using Big Data technologies for modern technologies and management methods in the modern market are shown

    Small-Size Resonant Photoacoustic Cell of Inclined Geometry for Gas Detection

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    A photoacoustic cell intended for laser detection of trace gases is represented. The cell is adapted so as to enhance the gas-detection performance and, simultaneously, to reduce the cell size. The cell design provides an efficient cancellation of the window background (a parasite response due to absorption of laser beam in the cell windows) and acoustic isolation from the environment for an acoustic resonance of the cell. The useful photoacoustic response from a detected gas, window background and noise are analyzed in demonstration experiments as functions of the modulation frequency for a prototype cell with the internal volume ~ 0.5 cm^3. The minimal detectable absorption for the prototype is estimated to be ~ 1.2 10^{-8} cm^{-1} W Hz^{-1/2}.Comment: 11 pages, 5 figure
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