In order to study the dynamic changes in gas concentration, to reduce gas hazards, and to protect and improve mining safety, a new method is proposed to predict gas concentration, based on the opposite degree algorithm. A priori and a posteriori values, opposite degree computation, opposite space, prior matrix, and posterior matrix are 6 basic concepts of the opposite degree algorithm. Several opposite degree numerical formulae to calculate the opposite degrees between gas concentration data and gas concentration data trends can be used to predict empirical results. The opposite degree numerical computation (OD-NC) algorithm has greater accuracy than several common prediction methods, such as RBF (Radial Basis Function) and GRNN (General Regression Neural Network). The prediction mean relative errors of RBF, GRNN and OD-NC are 7.812%, 5.674% and 3.284%, respectively. The simulation experiments show that the OD-NC algorithm is feasible and effective in practice.

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Keywords Data prediction, Gas concentration, Mining safety, Numerical simulations, Opposite degree algorithm
JEL Forecasting and Other Model Applications (jel C53), Computational Techniques; Simulation Modelling (jel C63), Mining, Extraction, and Refining: Hydrocarbon Fuels (jel L71)
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Journal Journal of Reviews on Global Economics
Yue, X.-G. (Xiao-Guang), & McAleer, M.J. (2017). Prediction of gas concentration based on the opposite degree algorithm. Journal of Reviews on Global Economics, 6, 154–162. doi:10.6000/1929-7092.2017.06.13