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Performance evaluation of continuous miner based underground mine operation system: An OEE based approach

REFERENCES Elevli, S. and Elevli, B., 2010. Performance measurement of mining equipments by utilizing OEE. Acta Montanistica Slovaca, 15(2), p.95. Government of India, Ministry of Coal. (2018). Chapter-6, Coal and Lignite production, Annual Report 2017-18. Available at: https://coal.nic.in/sites/upload_files/coal/files/coalupload/chap6AnnualReport1718en.pdf (Accessed: 30 June, 2019) Government of India, Ministry of Mines, Indian Bureau of Mines. (2017). Indian Minerals Yearbook 2017 (Part-III, Mineral reviews). Available at: https

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Business Performance Measurements in Asset Management with the Support of Big Data Technologies

References [1] D. Baglee, M. Knowles and S. Kinnunen, “A Proposed Maintenance Strategy for a Wind Turbine Gearbox Using Condition Monitoring Techniques”, International Journal of Process Management and Benchmarking, vol. 6, no. 3, pp. 386-403, 2016. [2] J. Lee, J. Ni, D. Djurdjanovic, H. Qiu and H. Liao, “Intelligent prognostics tools and e-maintenance”, Computers in Industry, vol. 57, no. 6, pp. 476-489, 2006. [3] T. Taticchi, F. Tonelli and L. Cagnazzo, “Performance Measurement and Management: A Literature

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Experimental Investigation of a Centrifugal Pump Hydraulic Performance in Hydraulic Transmission of Solids

reduce the variance of the results so that they are less dependent on the specifics of a single classifier. This will also reduce the variance of the bias, because a combination of multiple classifiers may lead to a more expressive concept class than a single classifier [ 1 ]. In a clear contrast to the general performance of centrifugal slurry pumps in conventional solid–liquid systems, the total head height increased with an increase in the slurry solid mass content because of several reasons, including unique friction loss behavior ( i.e ., drag reducing feature) of

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A Four-Node Tetrahedral Finite Element Based on Space Fiber Rotation Concept

., Yamashiro, T., and Yagawa, G. “Free mesh method using tetrahedral element including the vertex rotations”, in : Proceedings-Japan Society of Civil Engineers , DOTOKU GAKKAI, pp. 97–108, 2004. [4] Tian, R. and Yagawa, G., “Generalized nodes and high-performance elements”, International Journal for Numerical Methods in Engineering , 64, 2039–2071, 2005. doi.org/10.1002/nme.1436. [5] Tian, R., Matsubara, H. and Yagawa, G., “Advanced 4-node tetrahedrons”, International Journal for Numerical Methods in Engineering , 68, 1209–1231, 2006. doi.org/10.1002/nme.1744

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Analysis of Selected Aspects of Knowledge Management in the Context of Their Impact on the Quality Level in Metallurgical Enterprises

dynamic capabilities. Advances in Developing Human Resources, 11(3), 320-333. Hung, R. Y., Lien, B., Fang, S. C., McLean, G. N., (2010). Knowledge as a facilitator for enhancing innovation performance through total quality management. Total Quality Management, 21 (4), 425-438 Houselid, M.;A., (1995). The impact of human resource management practices on turnover, productivity and corporal financial performance. Academy of Management Journal, 38(3), 635-872. Kabo, Felichism, 2018. The architecture of network collective intelligence: Correlations between

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The Design of Forecasting System Used for Prediction of Electro-Motion Spare Parts Demands as an Improving Tool for an Enterprise Management

REFERENCES [1] J. F. Robeson and W. C. Copacino. The Logistics Handbook , New York, NY: The Free Press, 1994. [2] Y. Wang and B. Tomlin. “To Wait or Not to Wait: Optimal Ordering Under Lead Time Uncertainty and Forecast Updating”. Naval Research Logistics. vol. 56, pp. 766-779, 2009. [3] A. Wieczorek. “Methods and techniques of prediction of key performance indicators for implementation of changes in maintenance organisation”. Management Systems in Production Engineering , vol. 5, pp. 5-9, 2012. [4] T. Berlec, P. Potocnik, E. Govekar

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An Eight-Node Hexahedral Finite Element with Rotational DOFs for Elastoplastic Applications

Abstract

In this paper, the earlier formulation of the eight-node hexahedral SFR8 element is extended in order to analyze material nonlinearities. This element stems from the so-called Space Fiber Rotation (SFR) concept which considers virtual rotations of a nodal fiber within the element that enhances the displacement vector approximation. The resulting mathematical model of the proposed SFR8 element and the classical associative plasticity model are implemented into a Fortran calculation code to account for small strain elastoplastic problems. The performance of this element is assessed by means of a set of nonlinear benchmark problems in which the development of the plastic zone has been investigated. The accuracy of the obtained results is principally evaluated with some reference solutions.

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An attempt to increase technological capabilities of laboratory vibratory mills by changing the construction of chamber

Abstract

The paper presents the issues related to the grinding process in the vibration mills with low vibration frequency. These mills are rated among devices with high energy of impacts with much wider potential of industrial use than the classic gravitation mills. In vibratory mills there is an unfavorable decrease in the intensity of the grinding process along with the increase in the chamber diameter, which makes it impossible to achieve high performance of such devices. One of the ways to reduce or eliminate this occurrence is to intensify the load movement inside the chamber – this is the subject of this article. The article shows that in a vibrating mill of periodic action it is possible to increase its technological capabilities by application of an appropriate cylindrical component permanently installed inside the milling chamber. The paper also presents an attempt to increase the technological capabilities of a laboratory continuous vibratory mill.

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Defects and Incompatibilities of Pipes Manufactured by Pilgrim Method

Abstract

The increase in the quality requirements for the pipes and the increasing needs to reduce production costs, while increasing the efficiency of the process in market of hot rolled pipes are observed. One of the cost reduction factors is the reduction of the number of defects by early detection and, if possible, the removal of non-conformities. Incompatibility is an error that can be removed in accordance with the performance standard that does not cause defects (Norma API). The defect is imperfection that is so important that it is the basis for the removal of the product or its part based on the criteria set out in the performance standards. In pipe manufacturing processes, defects and batch incompatibilities can be distinguished, which arise in the steelworks during metal solidification and roll forming in the course of metal processing. The defect may also arise as a result of removing steel material or result from rolling processes defects. The paper presents the analysis of the process of quality control of pipes manufactured using the pilgrim method on the basis of real process data. The analysis were involved 1070 pieces of ingots from 11 different melts for rolling pipes. At various stages of production, discrepancies and defects were revealed, which were caused by metallurgical or technological defects associated with rolling pipes. The total amount of discrepancies and defects eliminated 168 pieces of finished pipes. The aim of the work is to show that by means of appropriately selected methods of eliminating imperfections, it is possible to increase the efficiency of the manufacturing process.

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Numerical modeling of vertical axis wind turbine with air guides

U., Piaskowska-Silarska M., Gumuła S., Farmaha I., (2019). Application of evolutionary algorithms to analysis the possibilities of wind energy use. W: ICCC 2019. Kraków – Wieliczka, May 26-29, 2019 e-ISBN: 978-1-7281-0701-1. pp. 1-7. Rahman M., Salyers T.E., El-Shahat A., Ilie M., Ahmed M., Soloiu V. (2018). Numerical and Experimental Investigation of Aerodynamic Performance of Vertical-Axis Wind Turbine Models with Various Blade Designs. Journal of Power and Energy Engineering, 6, 26-63. Kacprzak K., Sobczak K. (2013). Numeryczna analiza przepływu

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