Результаты поиска по 'facility location':
Найдено статей: 2
  1. Grigorieva A.V., Maksimenko M.V.
    Method for processing acoustic emission testing data to define signal velocity and location
    Computer Research and Modeling, 2022, v. 14, no. 5, pp. 1029-1040

    Non-destructive acoustic emission testing is an effective and cost-efficient way to examine pressure vessels for hidden defects (cracks, laminations etc.), as well as the only method that is sensitive to developing defects. The sound velocity in the test object and its adequate definition in the location scheme are of paramount importance for the accurate detection of the acoustic emission source. The acoustic emission data processing method proposed herein comprises a set of numerical methods and allows defining the source coordinates and the most probable velocity for each signal. The method includes pre-filtering of data by amplitude, by time differences, elimination of electromagnetic interference. Further, a set of numerical methods is applied to them to solve the system of nonlinear equations, in particular, the Newton – Kantorovich method and the general iterative process. The velocity of a signal from one source is assumed as a constant in all directions. As the initial approximation is taken the center of gravity of the triangle formed by the first three sensors that registered the signal. The method developed has an important practical application, and the paper provides an example of its approbation in the calibration of an acoustic emission system at a production facility (hydrocarbon gas purification absorber). Criteria for prefiltering of data are described. The obtained locations are in good agreement with the signal generation sources, and the velocities even reflect the Rayleigh-Lamb division of acoustic waves due to the different signal source distances from the sensors. The article contains the dependency graph of the average signal velocity against the distance from its source to the nearest sensor. The main advantage of the method developed is its ability to detect the location of different velocity signals within a single test. This allows to increase the degree of freedom in the calculations, and thereby increase their accuracy.

    Keywords: acoustic emission, Newton – Kantorovich method, calibration, location, iteration method, defects.
  2. Rusyak I.G., Nefedov D.G.
    Solution of optimization problem of wood fuel facility location by the thermal energy cost criterion
    Computer Research and Modeling, 2012, v. 4, no. 3, pp. 651-659

    The paper contains a mathematical model for the optimal location of enterprises producing fuel from renewable wood waste for the regional distributed heating supply system. Optimization is based on total cost minimization of the end product – the thermal energy from wood fuel. A method for solving the problem is based on genetic algorithm. The paper also shows the practical results of the model by example of Udmurt Republic.

    Keywords: facility location, mathematical model, optimization, wood fuel, thermal energy, genetic algorithm.
    Views (last year): 5. Citations: 2 (RSCI).

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