Journal•ISSN: 1008-0562
Journal of Liaoning Technical University
Liaoning Engineering Technology University Editorial
About: Journal of Liaoning Technical University is an academic journal. The journal publishes majorly in the area(s): Coal & Coal mining. Over the lifetime, 1374 publications have been published receiving 2693 citations.
Papers published on a yearly basis
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TL;DR: Wang et al. as discussed by the authors studied the movement properties of long distance and pressure relief rock mass upon exploited coal seam, the properties of crannies distribution and the seepage of pressure relief gas in long distance by the method of combining numerical simulation with experiments in the mine.
Abstract: This article studies the movement properties of long distance and pressure relief rock mass upon exploited coal seam, the properties of crannies distribution and the seepage of pressure relief gas in long distance by the method of combining numerical simulation with experiments in the mine. At the same time it also puts forward the extraction method of long distance and pressure relief gas according its flowage properties.At last by the experiments in Panji mine 1 of Huainan city of safe and highly efficient exploitation of coal and gas it proves that the long distance gas extraction method of using gridding bores through coal and rock seams in bed plate tunnel can eliminate the coal and gas outburst danger of pressure relief coal seams territorially, reduce the gas content in pressure relief coal seams efficiently and realize the safe and highly efficient exploitation of high gas content coal seams which have the coal and gas outburst danger.
22 citations
Journal Article•
TL;DR: The theory of fuzzy structuring element not only provides a simple and effective tool for the fuzzy analysis and calculations, but also makes a new path to study the theory and application of fuzzy analysis.
Abstract: Fuzzy number and fuzzy-valued functions are the basic concepts in fuzzy analysis. Generally, the operations of fuzzy numbers and fuzzy-valued functions are provided with the form based on the extension principle. In paper [1], presented the concept of fuzzy structuring element, and discussed some of its useful properties, proved the structuring element representation theorem of fuzzy number and fuzzy-valued function. In this paper, gave the differential and integral calculate method of fuzzy-valued functions using fuzzy structuring element method. The theory of fuzzy structuring element not only provides a simple and effective tool for the fuzzy analysis and calculations, but also makes a new path to study the theory and application of fuzzy analysis.
21 citations
Journal Article•
TL;DR: In this paper, the authors deduced the radii of the smashed and cracked areas in rock by a long charge explosion, with the Mises' strength criterion Meanwhile, the three-directional load and strain-rate effects of rock are taken into consideration, and the explosive charge for the controlled perimeter blasting is discussed.
Abstract: The formulae are deduced for calculation of the radii of the smashed and cracked areas in rock by a long charge explosion, with the Mises' strength criterion Meanwhile, the three-directional load and strain-rate effects of rock are taken into consideration Then, the explosive charge for the controlled perimeter blasting is discussed For the familiar rocks, the values from the formulae accord with blasting practice
20 citations
Journal Article•
TL;DR: The results indicate that the theory of Factor Space is a natural and effective approach for KDD performing knowledge discovering and concept generation.
Abstract: According to the applications of existing information systems theory and formal concept in database, this paper proposed a concept factor data-base which is a new database based on the theory of Factor Space, then introduced its own specific process on how to use factor data-bases to do feature partition and the concept lattice forming. Some polynomial algorithms are presented for extracting the concept lattice from concept analysis table.The results indicate that the theory of Factor Space is a natural and effective approach for KDD performing knowledge discovering and concept generation. Factor data-base is an application of the mathematical theory of Factor Space in the database, which can enrich and expand the functions of database in information processing.
18 citations
Journal Article•
TL;DR: In this paper, the authors proposed a method of line fitting by total least squares, which is more effective than that of ordianary least square on the whole on the line equation with errors-in-variables model.
Abstract: Line fitting obtained by ordingary least square is often different if the independent variable is defferent,the reason that result in the defference is analysised in the paper Then the method of line fitting by total least squares is proposed We describle the line equation with errors-in-variables model,and in the parameter solution the coefficient matrix is divided into two parts by using the QR decomposition And then the Related parameter can be achieved by the ordianary least squares and total least squares A conclusion can be got that ling fitting by total least squares is more effective than that of ordianary least square on the whole
16 citations