Wyniki 1-3 spośród 3 dla zapytania: authorDesc:"Kanat MUSSABEKOV"

Justification of ice melting capacity on 6-10kV OPL distributing power networks based on fuzzy modeling DOI:10.15199/48.2019.05.26

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As it is known [1], the key circuit parameters of ice melting are the value of active power losses per unit of wire length in the mode of melting deposits (melting capacity) and the time of melting deposits, which is a function of the melting capacity. When designing the ice melting schemes with using the special electric power plants of ice melting (limiting reactors, bearish autotransformers [2], iceprotected transformers [3]), which have recently used more often for harmonization of power system with the lines’ parameters. There is a problem of choosing an independent option of melting schemes (the melting capacity of deposits that must be provided by such a facility). The feasibility of mass industrial production of standardized installations for ice melting on 6-10 kV overhead power line (OPL) wires and a variety of parameters of electrical networks 6-10 kV lead to the need to solve this problem, taking into account factors of input data uncertainty. Approaches for designing of ice melting at 6-10 kV OPL electric distribution networks [1, 4] showed that the existing technical and economic models do not allow to take into account the effect of melting deposits power on cost of melting schemes characteristics and make selecting this option. In [5] we developed a single criterion technical and economic model for optimization the parameters of the ice melting schemes at 6-10 OPL using the reduced cost criterion, which takes into account the impact of melting capacity of deposits on such factors of the melting schemes as insufficient outputting of electrical energy to consumers during melting, electric power consumption for melting, the cost of electric power installations for ice melting, the cost of additional capacity of power transformer of the 110-35 / 6- 10 kV district substation. Basing on the model we carried out optimization of power ice melting, which should be provided by different electric power plants wi[...]

Substantiation of consolidated inertial parameters of vibrating bunker feeder DOI:10.15199/48.2019.04.09

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Vibrating bunker feeders are commonly used to automate production processes. They are widely manufactured by different world enterprises: Spirol International Corporation, Moorfeed Corporation A Division of Executive Automation Systems Inc., NTN Corporation. [1-5]. Two main types of vibration bunker feeders can be distinguished: with directed (fig. 1) and independent (fig. 2) oscillations. In vibration bunker feeders with independent (elliptical) oscillations, the direction of throwing is provided by force disturbance at two independent coordinates. Therefore, for determining the coefficients of stiffness of elastic nodes, we use well-known expressions for the consolidated mass at rectilinear oscillations or the consolidated moment of inertia of the system at angular oscillations [6-10]. a) b) Fig. 1. Vibrating bunker feeders with guided (screw-like) oscillations in which the bowl is made cylinder-like (a) and a conical-like (b) In vibration bunker feeders with propeller oscillations, the direction of throwing is ensured due to sloping elastic elements. In such structures, the propeller movement involves two: rectilinear and angular. Therefore, in order to determine the stiffness coefficient of an elastic node on the basis of a hyperboloid torsion, it is necessary to know the consolidated mass or the summed moment of inertia at propeller-shaped oscillations, which themselves contain, respectively, the proportion of the consolidated moment of inertia of the system at angular oscillations or the consolidated mass in rectilinear oscillations [11,12,16]. Fig. 2. Vibrating bunker feeder with independent (elliptical) oscillations In the technical literature you can find methods for calculating vibration bunker feeders parameters. One of the defining parameters is the consolidated mass or the summed moment of inertia of the oscillatory system, the motion of which is carried out on a propellant trajectory. It is impossible to c[...]

Determination of oxygen saturation and photosensitizer accumulation in the tumor with the help of LEDand laser diode-based irradiation sources and fiber-optics probes DOI:10.15199/48.2017.05.25

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In this paper the possibility of monitoring oxygenation of the tumor tissue through the registration LED technology in photodynamic therapy. The method is applied in the wavelength range, where the spectral difference between oxygenated and deoxygenated hemoglobin is rather high. This method will also help assess the effectiveness of PDT, the level of vascular damage and the degree of the tumor oxygenation. Streszczenie. W artykule przedstawiono możliwość monitorowania stopnia natlenienia tkanki nowotworowej poprzez wykorzystanie źródeł światła LED (light-emitting diodes) w terapii fotodynamicznej (PTD). Metoda może być wykorzystana w takim zakresie długości fal, w którym różnica spektralna pomiędzy hemoglobiną dotlenioną i niedotlenioną jest wysoka. Zaproponowana metoda może być również wykorzystana w ocenie skuteczność terapii PTD, ocenie poziom uszkodzenia naczyń oraz stopienia natlenienia nowotworu. (Wyznaczanie saturacji tlenem oraz akumulacji fotouczulacza w nowotworze przy użyciu sondy światłowodowej oraz źródeł promieniowania wykorzystujących diody LED oraz diody laserowe). Keywords: photodynamic therapy, oxygen saturation, CCD spectrometer, diffuse reflectance spectroscopy, signal fluorescence Słowa kluczowe: terapia fotodynamiczna, nasycenie tlenem, spektrometr CCD, spektroskopia odbicia rozproszonego, sygnał rozproszenia i fluorescencji. 1. Introduction The photodynamic therapy (PDT) procedure involves administration of a photoactive substance - a photosensitizer (PS), which selectively accumulates in malignant tissues, followed by light (laser) irradiation at a wavelength that corresponds to PS absorption characteristics [1, 2]. PS can interact with molecular oxygen, transforming absorbed light energy into singlet oxygen which damages cancer cells due to its strong oxidant activity. Therefore, the effectiveness of PDT treatment depends on molecular oxygen saturation level of irradiated tissues. In clinical settings tumor[...]

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