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An intelligent algorithm of minimum cutting plane to find the optimal size of extractable-blocks in dimension stone quarries

Abdollahisharif J., Bakhtavar E.

Archives of Mining Sciences

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2009

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Vol. 54, no 4

641-656

EN

Exceed 152 various active Dimension Stone (DS) quarries extracting by means of diamond wire are scattered throughout West Azerbaijan province in Iran. In this manner, incomes due to DS quarrying will affectively increase providing that costs of the diamond wire consumption and consequently specific cut (cutting planes per the unit of DS volume or weight) decrease. Therefore, in this study attempts hale been made to minimize specific cut so that a computerized procedure is pursued. The assembled data from the 110 working faces were employed during the computerized procedure design. Consequently, for the purpose that the specific cuts might be impressively reduced, an optimal shape and size of minableblocks were attained.

PL

W prowincji Azerbejdżan Zachodni w Iranie w ponad 152 kopalniach kamieni urabia się skały przy wykorzystaniu pił diamentowych. Uzyskane w ten sposób dochody z wydobycia kamieni mogą wzrosnąć, pod warunkiem jednakże, że koszty zużycia elementów diamentowych a także wielkość zabioru (ilość płaszczyzn tnących na jednostkę objętości lub wagi uzyskanych kamieni o żądanych wymiarach). W artykule tym podjęto próbę zminimalizowania ilości cięć w oparciu o skomputeryzowaną procedurę. Dane niezbędne do badań zebrano ze 110 ścian wybieranych w oparciu o procedurę komputerową. W rezultacie ilość operacji cięcia uległa znacznemu obniżeniu i pozyskano kamienie o optymalnym kształcie i wymiarach.

2

Procedury komputerowe obliczeń nośności ściskanych elemntów żelbetowych

Murzewski J.

Inżynieria i Budownictwo

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2003

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R. 59, nr 11

634-637

PL

Przedstawiono procedury projektowania: zwyczajną i macierzową. W rozważaniach uwzględniono ustalenia normy PN-B-03264:2002.

EN

Usual and matrix design procedures are presented. Provisions for the new Polish standard PN-B-03264:2002 are rearranged and transformed in order to get rid of impicit expressions and descriptive requirements.

3

Determination of the surface state density distribution and fermi level position on the InP (100) surface from excitation-power-dependent photoluminescence efficiency spectra

Adamowicz B., Miczek M., Domagała T., Hasegawa H.

Elektronika : konstrukcje, technologie, zastosowania

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2001

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Vol. 42, nr 8-9

76-78

EN

The energy distribution of the surface state density NSS(E) on the chemically polished n-type InP (100) surface was determined from a rigorous computer analysis of the band-to-band photoluminescence efficiency (ϒ PL) versus excitation light intensity (θ). We obtained a very good modelling of the experimental ϒ PL-θ spectrum, taken from the literature, which exhibited a strong increase of ϒ PL. The theoretical values of ϒ PL were calculated using a numerical simulator taking account of all possible recombination processes in a bulk and via surface states. Due to an optimised fitting realised by means of a novel fully-computer procedure based on Genetic Algorithm, we determined the U-shaped NSS(E) distribution as well as the values of surface state cross sections for capturing electrons (σn) and holes (σp). In addition, we analysed the behaviour of the quasi-Fermi levels (EFn, EFp) on the surface and profiles of the radiative recombination velocity (Urad) under increasing excitation intensity.