منابع مشابه
Cut-off Grade Optimization for Maximizing the Output Rate
In the open-pit mining, one of the first decisions that must be made in production planning stage, after completing the design of final pit limits, is determining of the processing plant cut-off grade. Since this grade has an essential effect on operations, choosing the optimum cut-off grade is of considerable importance. Different goals may be used for determining optimum cut-off grade. One of...
متن کاملMultiple Type Discriminating Mine Fire Sensors
Multiple Type Discriminating Mine Fire Sensors J.C. Edwards, R.A. Franks, G.F. Friel, C.P. Lazzara, and J.J. Opferman NIOSH/Pittsburgh Research Laboratory Pittsburgh, PA 15236-0070 ABSTRACT It was determined that a selection of different types of fire sensors could be used to discriminate mine fires from nuisance emissions produced by diesel equipment. A neural network (NN) was developed for ap...
متن کاملIn-mine Evaluation of Underground Fire
The current s t a t e of the a r t of f i r e and smoke detect ion technology i s reviewed from the standpoint of s u i t a b i l i t y f o r use i n underground metal and nonmetal mines. Detection modes, f i r e signatures, and environmental considerat ions a r e included. Preliminary r e s u l t s of longterm, in-mine t e s t s a r e presented.
متن کاملSTUDY OF NUCLEAR LEVEL DENSITY AND SPIN CUT-OFF FACTORS
Nuclear level densities and spin cut-off factors have been deduced for nuclei in the mass region 24‹A‹63,from a microscopic theory, which includes nuclear pairing interaction. Single particle levels for both Seeger and Nilsson potentials were used in the calcdations. Level densities extracted from the theory are compared with their conesponding experimental values, It is found that the overall...
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ژورنال
عنوان ژورنال: Journal of the Franklin Institute
سال: 1879
ISSN: 0016-0032
DOI: 10.1016/0016-0032(79)90596-9